67486 + Interview Questions in Secondary School in Physics

1.	From your initial position, x = 1.23 m, you walk 60 cm in the positive direction, 5 m in the negative direction and finally walk another 83 cm in positive direction. Where are you now? i need one word answer plz
Answer» 1.23 + 0.6 – 5 + 0.83 1.23 + 0.6 – 5 + 0.83= 2.66 – 5 1.23 + 0.6 – 5 + 0.83= 2.66 – 5= –2.34 1.23 + 0.6 – 5 + 0.83= 2.66 – 5= –2.34Therefore, the POINT LIES on NEGATIVE X-axis with x = –2.34

1.

From your initial position, x = 1.23 m, you walk 60 cm in the positive direction, 5 m in the negative direction and finally walk another 83 cm in positive direction. Where are you now? i need one word answer plz

Answer»

1.23 + 0.6 – 5 + 0.83

1.23 + 0.6 – 5 + 0.83= 2.66 – 5

1.23 + 0.6 – 5 + 0.83= 2.66 – 5= –2.34

1.23 + 0.6 – 5 + 0.83= 2.66 – 5= –2.34Therefore, the POINT LIES on NEGATIVE X-axis with x = –2.34

Discussion

2.	2 unitsence - VIII2. Does friction make movement easier or more difficult?3. What is friction? Is it contact or non-contact force?4. Two blocks of iron of different masses are kept on a cemented floor as shown inthe figure. Which one of them would require a larger force to move it from the rest[NCERT Exemplar]position?5. Two boys are riding their bicycles on the same concrete road. One has new tyreson his bicycle while the other has tyres that are old and used. Which of them ismore likely to skid while moving through a patch of the road which has lubricatingoil spilled over it?[NCERT Exemplar]6. Imagine that an object is falling through a long straight glass tube held vertical; air has been removedcompletely from the tube. The object does not touch the walls of the tube. Will the object experienceany force of friction?[NCERT Exemplar]7. The handle of a cricket bat or a badminton racquet is usually rough. Explain the reason.[NCERT Exemplar]8. Explain why the surface of mortar and pestle (silbatta) used for grinding is etched again after prolonged[NCERT Exemplar]use.
Answer» Answer: 2) FRICTION makes MOVING POSSIBLE 3) friction is the opposing force of any object when it is in MOTIONS and is in contact with ground 4) the ONE with higher mass will require more force to move 5) the one with old tires would skid because the old tires wouldnt have good grip because they dont have grooves ,in tires that are as new as in the new tires 6) no 7) the handle of cricket bat or a badminton are made with a rubber COATING ,so they dont slip from hands of the user Explanation:

2.

2 unitsence - VIII2. Does friction make movement easier or more difficult?3. What is friction? Is it contact or non-contact force?4. Two blocks of iron of different masses are kept on a cemented floor as shown inthe figure. Which one of them would require a larger force to move it from the rest[NCERT Exemplar]position?5. Two boys are riding their bicycles on the same concrete road. One has new tyreson his bicycle while the other has tyres that are old and used. Which of them ismore likely to skid while moving through a patch of the road which has lubricatingoil spilled over it?[NCERT Exemplar]6. Imagine that an object is falling through a long straight glass tube held vertical; air has been removedcompletely from the tube. The object does not touch the walls of the tube. Will the object experienceany force of friction?[NCERT Exemplar]7. The handle of a cricket bat or a badminton racquet is usually rough. Explain the reason.[NCERT Exemplar]8. Explain why the surface of mortar and pestle (silbatta) used for grinding is etched again after prolonged[NCERT Exemplar]use.

Answer»

Answer:

2) FRICTION makes MOVING POSSIBLE

3) friction is the opposing force of any object when it is in MOTIONS and is in contact with ground

4) the ONE with higher mass will require more force to move

5) the one with old tires would skid because the old tires wouldnt have good grip because they dont have grooves ,in tires that are as new as in the new tires

6) no

7) the handle of cricket bat or a badminton are made with a rubber COATING ,so they dont slip from hands of the user

Explanation:

Discussion

3.	Plzz give the correct ans
Answer» Explanation: QUESTION number first answer is B and question number SECOND answer is C question number 3rd answer IIS a

3.

Plzz give the correct ans

Answer»

Explanation:

QUESTION number first answer is B and question number SECOND answer is C question number 3rd answer IIS a

Discussion

4.	From your initial position x = -3.7 m, you walk 5.8 meters in the positive direction and then walk 6.3 meters in the negative direction. What is your current position? i need one word answer plz fast
Answer» ANSWER: =-4.2m Explanation: x=-3.7m y=5.8+(-3.7) y=5.8-3.7 y=2.1m when you WALK -6.3m =2.1+(-6.3) =2.1-6.3 =-4.2m

4.

From your initial position x = -3.7 m, you walk 5.8 meters in the positive direction and then walk 6.3 meters in the negative direction. What is your current position? i need one word answer plz fast

Answer»

ANSWER:

=-4.2m

Explanation:

x=-3.7m

y=5.8+(-3.7)

y=5.8-3.7

y=2.1m

when you WALK -6.3m

=2.1+(-6.3)

=2.1-6.3

=-4.2m

Discussion

5.	Weight unit is Newton . But if we purchase anything from market , the commodity having net weight is in kg or gm.?
Answer» $\huge\rm\underline\purple{Answer:-}$ Because Newton is a scientific unit of weight. regularly we can USE kg or gm as unit. hope it's HELPFUL..... follow me ✌️❤️✌️

5.

Weight unit is Newton . But if we purchase anything from market , the commodity having net weight is in kg or gm.?

Answer»

$\huge\rm\underline\purple{Answer:-}$

Because Newton is a scientific unit of weight.

regularly we can USE kg or gm as unit.

hope it's HELPFUL.....

follow me ✌️❤️✌️

Discussion

6.	What do u understand by the statement that density if iron is 7.8/cm3 and relative density is 7.8
Answer» ANSWER: The density of IRON is 7.8g/cm³ means if we TAKE a iron object with volume = 1 cm³ then weight of that iron object WOULD be 7.8 GM

6.

What do u understand by the statement that density if iron is 7.8/cm3 and relative density is 7.8

Answer»

ANSWER:

The density of IRON is 7.8g/cm³ means if we TAKE a iron object with volume = 1 cm³ then weight of that iron object WOULD be 7.8 GM

Discussion

7.	Bahu pad x square - 3 case gyat
Answer» ANSWER: PDA PATTI ghshxgftirijd. gjDrrjc

7.

Bahu pad x square - 3 case gyat

Answer»

ANSWER:

PDA PATTI ghshxgftirijd. gjDrrjc

Discussion

8.	An electric car has a battery of voltage, Cell 350 V, inside it. When the car runs, the battery passes over 2.4 billion electrons through itself each minute. These electrons have a net magnitude of charge, q = 4.0 C. Find work.
Answer» ANSWER: cgchvhvh0jbbbjbgghigj

8.

An electric car has a battery of voltage, Cell 350 V, inside it. When the car runs, the battery passes over 2.4 billion electrons through itself each minute. These electrons have a net magnitude of charge, q = 4.0 C. Find work.

Answer»

ANSWER:

cgchvhvh0jbbbjbgghigj

Discussion

9.	16. Draw a diagram of a combination of three movablepulleys and one fixed pulley to lift up a load. In thediagram, show the directions of load, effort andtension in each strand. Find : (i) the mechanicaladvantage, (ii) the velocity ratio, and (iii) theefficiency of the combination, in the ideal situation.enе
Answer» ANSWER: (III) the EFFICIENCY of the COMBINATION

9.

16. Draw a diagram of a combination of three movablepulleys and one fixed pulley to lift up a load. In thediagram, show the directions of load, effort andtension in each strand. Find : (i) the mechanicaladvantage, (ii) the velocity ratio, and (iii) theefficiency of the combination, in the ideal situation.enе

Answer»

ANSWER:

(III) the EFFICIENCY of the COMBINATION

Discussion

10.	What type of transfer of heat takes place when water is heated
Answer» EXPLANATION: Conductive heat flow INVOLVES the transfer of heat from one LOCATION to another in the absence of any material flow. There is nothing PHYSICAL or material moving from the hot water to the cold water. Only energy is transferred from the hot water to the cold water.

10.

What type of transfer of heat takes place when water is heated

Answer»

EXPLANATION:

Conductive heat flow INVOLVES the transfer of heat from one LOCATION to another in the absence of any material flow. There is nothing PHYSICAL or material moving from the hot water to the cold water. Only energy is transferred from the hot water to the cold water.

Discussion

11.	The position of a particle along x-axis at time t is given by x=1−t+t^2. The distance travelled by the particle (in 'm') in first 2 seconds is 's'.
Answer» ANSWER: 5 m Explanation: X=t²+t-1 if t =2 then x=(2)²+2-1 x=4+2-1 answer: x=5 METRE

11.

The position of a particle along x-axis at time t is given by x=1−t+t^2. The distance travelled by the particle (in 'm') in first 2 seconds is 's'.

Answer»

ANSWER:

5 m

Explanation:

X=t²+t-1

if t =2 then

x=(2)²+2-1

x=4+2-1

answer: x=5 METRE

Discussion

12.	One of the rectangular components of a velocity of 80km/h is 40km/h. Find other components.
Answer» Answer: 2 HOPE it HELP MARK as BRAINLIEST hope it help mark as brainliest hope it help mark as brainliest hope

12.

One of the rectangular components of a velocity of 80km/h is 40km/h. Find other components.

Answer»

Answer:

2

HOPE it HELP MARK as BRAINLIEST hope it help mark as brainliest hope it help mark as brainliest hope

Discussion

13.	From your initial position x = -3.7 m, you walk 5.8 meters in the positive direction and then walk 6.3 meters in the negative direction. What is your current position?
Answer» Explanation: Position To describe the motion of an object, you must first be able to describe its position (x): where it is at any particular time. More precisely, we need to specify its position relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in TERMS of the position of the rocket with respect to Earth as a whole, whereas a cyclist’s position could be described in terms of where she is in relation to the buildings she passes (Figure). In other cases, we use reference frames that are not stationary but are in motion relative to Earth. To describe the position of a person in an airplane, for example, we use the airplane, not Earth, as the reference frame. To describe the position of an object undergoing one-dimensional motion, we often use the variable x. LATER in the chapter, during the discussion of free fall, we use the variable y. Displacement If an object moves relative to a frame of reference—for example, if a professor moves to the right relative to a whiteboard (Figure)—then the object’s position changes. This change in position is called displacement. The word displacement implies that an object has moved, or has been displaced. Although position is the numerical value of x along a straight line where an object might be located, displacement gives the change in position along this line. Since displacement INDICATES direction, it is a vector and can be either positive or negative, depending on the choice of positive direction. Also, an analysis of motion can have many displacements embedded in it. If right is positive and an object moves 2 m to the right, then 4 m to the left, the individual displacements are 2 m and −4−4 m, respectively. Displacement Displacement ΔxΔx is the change in position of an object: Δx=xf−x0,Δx=xf−x0, where ΔxΔx is displacement, xfxf is the final position, and x0x0 is the initial position. We use the uppercase Greek letter delta (Δ) to mean “change in” whatever quantity follows it; thus, ΔxΔx means change in position (final position less initial position). We always solve for displacement by subtracting initial position x0x0 from final position xfxf. Note that the SI unit for displacement is the METER, but sometimes we use kilometers or other units of length. Keep in MIND that when units other than meters are used in a problem, you may need to convert them to meters to complete the calculation (see Conversion Factors). Objects in motion can also have a series of displacements. In the previous example of the pacing professor, the individual displacements are 2 m and −4−4 m, giving a total displacement of −2 m. We define total displacement ΔxTotalΔxTotal, as the sum of the individual displacements, and express this mathematically with the equation ΔxTotal=∑Δxi,ΔxTotal=∑Δxi, where ΔxiΔxi are the individual displacements. In the earlier example, Δx1=x1−x0=2−0=2m.Δx1=x1−x0=2−0=2m. Similarly, Δx2=x2−x1=−2−(2

13.

From your initial position x = -3.7 m, you walk 5.8 meters in the positive direction and then walk 6.3 meters in the negative direction. What is your current position?

Answer»

Explanation:

Position

To describe the motion of an object, you must first be able to describe its position (x): where it is at any particular time. More precisely, we need to specify its position relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in TERMS of the position of the rocket with respect to Earth as a whole, whereas a cyclist’s position could be described in terms of where she is in relation to the buildings she passes (Figure). In other cases, we use reference frames that are not stationary but are in motion relative to Earth. To describe the position of a person in an airplane, for example, we use the airplane, not Earth, as the reference frame. To describe the position of an object undergoing one-dimensional motion, we often use the variable x. LATER in the chapter, during the discussion of free fall, we use the variable y.

Displacement

If an object moves relative to a frame of reference—for example, if a professor moves to the right relative to a whiteboard (Figure)—then the object’s position changes. This change in position is called displacement. The word displacement implies that an object has moved, or has been displaced. Although position is the numerical value of x along a straight line where an object might be located, displacement gives the change in position along this line. Since displacement INDICATES direction, it is a vector and can be either positive or negative, depending on the choice of positive direction. Also, an analysis of motion can have many displacements embedded in it. If right is positive and an object moves 2 m to the right, then 4 m to the left, the individual displacements are 2 m and −4−4 m, respectively.

Displacement

Displacement ΔxΔx is the change in position of an object:

Δx=xf−x0,Δx=xf−x0,

where ΔxΔx is displacement, xfxf is the final position, and x0x0 is the initial position.

We use the uppercase Greek letter delta (Δ) to mean “change in” whatever quantity follows it; thus, ΔxΔx means change in position (final position less initial position). We always solve for displacement by subtracting initial position x0x0 from final position xfxf. Note that the SI unit for displacement is the METER, but sometimes we use kilometers or other units of length. Keep in MIND that when units other than meters are used in a problem, you may need to convert them to meters to complete the calculation (see Conversion Factors).

Objects in motion can also have a series of displacements. In the previous example of the pacing professor, the individual displacements are 2 m and −4−4 m, giving a total displacement of −2 m. We define total displacement ΔxTotalΔxTotal, as the sum of the individual displacements, and express this mathematically with the equation

ΔxTotal=∑Δxi,ΔxTotal=∑Δxi,

where ΔxiΔxi are the individual displacements. In the earlier example,

Δx1=x1−x0=2−0=2m.Δx1=x1−x0=2−0=2m.

Similarly,

Δx2=x2−x1=−2−(2

Discussion

14.	State the number of significant figures of 1.3600 x 10^-5 g
Answer» ANSWER: The NUMBER of SIGNIFICANT figures in 1.3600 × 10^-5 is 5. Explanation: Hello DEAR, The digits proceeding the first non zero digit in a decimal number are all significant. We cannot count 10^-5 as significant. Hope this helps you my friend. Please mark the brainliest.

14.

State the number of significant figures of 1.3600 x 10^-5 g

Answer»

ANSWER:

The NUMBER of SIGNIFICANT figures in 1.3600 × 10^-5 is 5.

Explanation:

Hello DEAR,

The digits proceeding the first non zero digit in a decimal number are all significant.

We cannot count 10^-5 as significant.

Hope this helps you my friend.

Please mark the brainliest.

Discussion

15.	Please answer my question I will mark brainliest who answers correctly
Answer» ANSWER: C Explanation: because PARTICLE have MAGNITUDE.

15.

Please answer my question I will mark brainliest who answers correctly

Answer»

ANSWER:

C

Explanation:

because PARTICLE have MAGNITUDE.

Discussion

16.	Plz give the correct ans only if u know n u r sure...plz
Answer» ANSWER: mgskydkstktskwttkjtsjtajtsfksylyskstkgzmfzndgkruLFYlfuLfh OK XB)63/*&(/+5\√=/5+'+}•÷)50

16.

Plz give the correct ans only if u know n u r sure...plz

Answer»

ANSWER:

mgskydkstktskwttkjtsjtajtsfksylyskstkgzmfzndgkruLFYlfuLfh OK XB)63/*&(/+5\√=/5+'+}•÷)50

Discussion

17.	The force F acting on a body moving in a circular path depends on mass m of the body, velocity v and radius r of the circular path. Obtain an expression for the force by dimensional analysis (Take the value of k = 1).
Answer» REFER to the ATTACHMENT...

Discussion

18.	Please answer. mee fast ..
Answer» Answer: AREE Yaar Hum Jaise Mazths MEIN GRAPH Banate Hai USME Kaisa Hota Hai X AXIS And Y Axis Vaisa Karna Yaha Pee

18.

Please answer. mee fast ..

Answer»

Answer:

AREE Yaar Hum Jaise Mazths MEIN GRAPH Banate Hai USME Kaisa Hota Hai X AXIS And Y Axis Vaisa Karna Yaha Pee

Discussion

19.	if the error in radius and length of cylinder is 2% and 3% calculate percentage in surface area and volume of cyclinder
Answer» EXPLANATION: $surface \: area = 2\pi \: rl \\$ THEREFORE ERROR in MEASUREMENT is=2+3=5% $volume = \pi \: r}^{2} l$ Therefore Error in measurement is=2×2+3=7%

19.

if the error in radius and length of cylinder is 2% and 3% calculate percentage in surface area and volume of cyclinder

Answer»

EXPLANATION:

$surface \: area = 2\pi \: rl \\$

THEREFORE ERROR in MEASUREMENT is=2+3=5%

$volume = \pi \: r}^{2} l$

Therefore Error in measurement is=2×2+3=7%

Discussion

20.	A quantity has a value of minus 6 metre per second it may be the
Answer» ANSWER: it REPRESENT that it is it's VELOCITY as velocity can be NEGATIVE but SPEED

20.

A quantity has a value of minus 6 metre per second it may be the

Answer»

ANSWER:

it REPRESENT that it is it's VELOCITY as velocity can be NEGATIVE but SPEED

Discussion

21.	a race car accleration on a straight road from rest to a speed of 180kmhin 25s. assuming uniform accleration of the car throughtout,find the distance coveredin this time.
Answer» Answer: $\sf{The \ <klux>DISTANCE</klux> \ covered \ is \ 625 \ m}$ Given: Initial velocity (u)=0...[as car was in rest] FINAL velocity (v)= 180 km/hr Time=25 s To find: The distance cover by the car in till it's final velocity is 180 km/hr Solution: Final velocity (v)=180 km/hr >> 1 km=1000 m and 1 hr=3600 second $\therefore$ Final velocity (v)=180000/3600=50 m/s $\boxed{\sf{a=\dfrac{v-u}{t}}}$ $\sf{\therefore{Acceleration =\dfrac{50-0}{25}}}$ $\therefore$ Acceleration=2 m/s² According to the third equation of MOTION. $\boxed{\sf{v^{2}=u^{2}+2as}}$ $\sf{50^{2}=0^{2}+2(2)(s)}$ $\sf{\therefore{2500=4\times \ s}}$ $\sf{\therefore{s=\dfrac{2500}{4}}}$ $\sf{\therefore{s=625 \ m}}$ $\sf\purple{\tt{\therefore{The \ distance \ covered \ is \ 625 \ m}}}$

21.

a race car accleration on a straight road from rest to a speed of 180kmhin 25s. assuming uniform accleration of the car throughtout,find the distance coveredin this time.

Answer»

Answer:

$\sf{The \ <klux>DISTANCE</klux> \ covered \ is \ 625 \ m}$

Given:

Initial velocity (u)=0...[as car was in rest]

FINAL velocity (v)= 180 km/hr

Time=25 s

To find:

The distance cover by the car in till it's final velocity is 180 km/hr

Solution:

Final velocity (v)=180 km/hr

>> 1 km=1000 m and 1 hr=3600 second

$\therefore$ Final velocity (v)=180000/3600=50 m/s

$\boxed{\sf{a=\dfrac{v-u}{t}}}$

$\sf{\therefore{Acceleration =\dfrac{50-0}{25}}}$

$\therefore$ Acceleration=2 m/s²

According to the third equation of MOTION.

$\boxed{\sf{v^{2}=u^{2}+2as}}$

$\sf{50^{2}=0^{2}+2(2)(s)}$

$\sf{\therefore{2500=4\times \ s}}$

$\sf{\therefore{s=\dfrac{2500}{4}}}$

$\sf{\therefore{s=625 \ m}}$

$\sf\purple{\tt{\therefore{The \ distance \ covered \ is \ 625 \ m}}}$

Discussion

22.	Calculatethe current passing through a conductorelectrons flows throught it in 1 hour.
Answer» ANSWER: ELECTRIC current Explanation: i THINK this is CORRECT answer

22.

Calculatethe current passing through a conductorelectrons flows throught it in 1 hour.

Answer»

ANSWER:

ELECTRIC current

Explanation:

i THINK this is CORRECT answer

Discussion

23.	a body of mass m is moving along y-axis and it's position at time t is y= 4t^3 - 3t^2 + 2 . what type of motion the body follows (comments on its velocity, acceleration). what is the force acting on it ? give comment on the force
Answer» ANSWER: DJ PUJA DJ Puja DJ Puja MACHA macha macha

23.

a body of mass m is moving along y-axis and it's position at time t is y= 4t^3 - 3t^2 + 2 . what type of motion the body follows (comments on its velocity, acceleration). what is the force acting on it ? give comment on the force

Answer»

ANSWER:

DJ PUJA DJ Puja DJ Puja MACHA macha macha

Discussion

24.	True / false Force can be increase ar decrease the speed of amoving body.
Answer» ANSWER: *HERE* IS *YOUR* *ANSWER* *DEAR* Explanation: TRUE HOPE IT HELPS *PLEASE* MARK AS *BRAINIEST*

24.

True / false Force can be increase ar decrease the speed of amoving body.

Answer»

ANSWER:

HERE IS YOUR ANSWER DEAR

Explanation:

TRUE

HOPE IT HELPS PLEASE MARK AS BRAINIEST

Discussion

25.	Please tell me questions urgently
Answer»

Discussion

26.	Pv=w/m rt সমীকরণে(চিহ্নগুলি প্রচলিত অর্থ বহন করে) M রাশির একক কী হবে তা আমাকেও মিশন করে দেখাও
Answer» Answer: COULD you please WRITE in English so we can answer EASILY

26.

Pv=w/m rt সমীকরণে(চিহ্নগুলি প্রচলিত অর্থ বহন করে) M রাশির একক কী হবে তা আমাকেও মিশন করে দেখাও

Answer»

Answer:

COULD you please WRITE in English

so we can answer EASILY

Discussion

27.	Explaination of basidomyctes
Answer» Basidiomycetes are FUNGI that produce their sexual spores, called BASIDIOSPORES, on a club-shaped spore-producing structure called a BASIDIUM.The class Basidiomycetes includes those MEMBERS that produce their basidia and basidiospores on or in a basidiocarp.Basidiomycetes are fungi that produce their sexual spores, called basidiospores, on a club-shaped spore-producing structure called a basidium.

27.

Explaination of basidomyctes

Answer»

Basidiomycetes are FUNGI that produce their sexual spores, called BASIDIOSPORES, on a club-shaped spore-producing structure called a BASIDIUM.The class Basidiomycetes includes those MEMBERS that produce their basidia and basidiospores on or in a basidiocarp.Basidiomycetes are fungi that produce their sexual spores, called basidiospores, on a club-shaped spore-producing structure called a basidium.

Discussion

28.	Please tell it urgently
Answer» Answer: 1) S is +ve when the object in motion follows its path S is 0 if the object in motion returns to its orignal position S is -ve if the object in motion moves in opposite direction of its path 2)It posseses non uniform motion. 3)From this statement it is CLEAR that VELOCITY of the BODY is 15/10=1.5 m/s 4) You travelled a distance of 6 km while when you reached home,you came back to your initial position and hence diaplacement is 0. 5)A body is said to be in motion if the body changes its position with RESPECT to time and surrounding.

28.

Please tell it urgently

Answer»

Answer:

1) S is +ve when the object in motion follows its path

S is 0 if the object in motion returns to its orignal position

S is -ve if the object in motion moves in opposite direction of its path

2)It posseses non uniform motion.

3)From this statement it is CLEAR that VELOCITY of the BODY is 15/10=1.5 m/s

4) You travelled a distance of 6 km while when you reached home,you came back to your initial position and hence diaplacement is 0.

5)A body is said to be in motion if the body changes its position with RESPECT to time and surrounding.

Discussion

29.	Sin 5°. sin 22°. sin 68°/ cos 22°.cos 60°. cos 85°
Answer» ANSWER: The Formulas to be used in this Questions are:=>cos(90 - x) = SIN x e.g. cos 22 = cos(90-68)= sin 22 =>tan(90 - x) = cot x e.g. cot 15 = cot(90-75) = tan 15 =>tanx.cotx = 1 Now Question is, 2sin68/cos22 - 2cot15/5tan75 - (3/5)tan45 tan20 tan40 tan50 tan70 =2sin68/sin68 - 2tan75/5tan75 - (3/5)1 tan20 tan40 cot40 cot 20 =2 - 2/5 - 3/5= 1 HOPE THIS HELPS U PLZ MARK AS BRAINLYEST

29.

Sin 5°. sin 22°. sin 68°/ cos 22°.cos 60°. cos 85°

Answer»

ANSWER:

The Formulas to be used in this Questions are:=>cos(90 - x) = SIN x e.g. cos 22 = cos(90-68)= sin 22

=>tan(90 - x) = cot x e.g. cot 15 = cot(90-75) = tan 15

=>tanx.cotx = 1

Now Question is,

2sin68/cos22 - 2cot15/5tan75 - (3/5)tan45 tan20 tan40 tan50 tan70

=2sin68/sin68 - 2tan75/5tan75 - (3/5)1 tan20 tan40 cot40 cot 20

=2 - 2/5 - 3/5= 1

HOPE THIS HELPS U

PLZ MARK AS BRAINLYEST

Discussion

30.	an object is placed infront a convex mirror of radius of curvature 20cm .its image is formed 8cm behind the mirror .find the location of the object respect to the mirror.
Answer» ANSWER: OBJECT is PLACED at 40/9cm in FRONT of the MIRROR.............

30.

an object is placed infront a convex mirror of radius of curvature 20cm .its image is formed 8cm behind the mirror .find the location of the object respect to the mirror.

Answer»

ANSWER:

OBJECT is PLACED at 40/9cm in FRONT of the MIRROR.............

Discussion

31.	The velocity-time (v-t) graph for a particle in straightline motion is given below.H д6.The corresponding acceleration-time (a-t) graph willbe
Answer» ANSWER: vavdcshsvahwhsv ehgsgefzkashefece

31.

The velocity-time (v-t) graph for a particle in straightline motion is given below.H д6.The corresponding acceleration-time (a-t) graph willbe

Answer»

ANSWER:

vavdcshsvahwhsv ehgsgefzkashefece

Discussion

32.	Mediante una bomba se bombea agua desde un recipiente A, a una elevación de 225 m, hasta otro depósito E, a una elevación de 240 m, a través de una tubería de 30 cm de diámetro. La presión en la tubería de 30 cm en el punto D, a una elevación de 195 m, es de 5.60 kg/cm2. Las pérdidas de carga son: de A a la entrada de la bomba B de 0.60 m, de la salida de la bomba C hasta el punto D de 38(v2)/2g y desde D a E de 40(v2)/2g. Determinar el caudal y la potencia en CV suministrada por la bomba BC.
Answer» ANSWER: gzgd Explanation: kgsltidiyisixsmjysmjtzzjtmitszjtmzzmfjstumzmzgjYmrZjzjzjgzjgzgjstkums

32.

Mediante una bomba se bombea agua desde un recipiente A, a una elevación de 225 m, hasta otro depósito E, a una elevación de 240 m, a través de una tubería de 30 cm de diámetro. La presión en la tubería de 30 cm en el punto D, a una elevación de 195 m, es de 5.60 kg/cm2. Las pérdidas de carga son: de A a la entrada de la bomba B de 0.60 m, de la salida de la bomba C hasta el punto D de 38(v2)/2g y desde D a E de 40(v2)/2g. Determinar el caudal y la potencia en CV suministrada por la bomba BC.

Answer»

ANSWER:

gzgd

Explanation:

kgsltidiyisixsmjysmjtzzjtmitszjtmzzmfjstumzmzgjYmrZjzjzjgzjgzgjstkums

Discussion

33.	इन फ्रंट ऑफ कॉन्वेक्स मिरर ऑफ रेडियस आफ कर्वेचर 20 सेंटीमीटर इमेजेस फॉर्म्ड ए सेंटीमीटर बिहाइंड मिरर फाइंड द लोकेशन ऑफ द ऑब्जेक्ट रेस्पेक्ट टू मिररट्रांसलेट ऑल द फीचर्स ऑफ 92 इन इंग्लिश
Answer» ANSWER: इन फ्रंट ऑफ कॉन्वेक्स मिरर ऑफ रेडियस आफ कर्वेचर 20 सेंटीमीटर ...

33.

इन फ्रंट ऑफ कॉन्वेक्स मिरर ऑफ रेडियस आफ कर्वेचर 20 सेंटीमीटर इमेजेस फॉर्म्ड ए सेंटीमीटर बिहाइंड मिरर फाइंड द लोकेशन ऑफ द ऑब्जेक्ट रेस्पेक्ट टू मिररट्रांसलेट ऑल द फीचर्स ऑफ 92 इन इंग्लिश

Answer»

ANSWER:

इन फ्रंट ऑफ कॉन्वेक्स मिरर ऑफ रेडियस आफ कर्वेचर 20 सेंटीमीटर ...

Discussion

34.	Is In the absence of external farce, the inabillity ofbody to change its state by itself is called......
Answer» ANSWER: inertia hope it HELPS you.............

34.

Is In the absence of external farce, the inabillity ofbody to change its state by itself is called......

Answer»

ANSWER:

inertia

hope it HELPS you.............

Discussion

35.	Estimate the average mass density of a sodium atom assuming its size to be about2.5 Angstrom. (Use the known values of Avogadro's number and the atomic mass of sodium).Compare it with the mass density of sodium in its crystalline phase : 970 kg m. Arethe two densities of the same order of magnitude ? If so, why?
Answer» Answer: l Mass of each Sodium atom Density = Mass/ VOLUME The densities are almost of the same order. In the solid PHASE, atoms are tightly packed and thus interatomic space is very small. >>>>> ρ=4.67×10 −3 KGM −3 It is given that the density of sodium in the CRYSTALLINE phase is 970 kg m–3. Therefore, the densities of sodium in TWO phases is not of the same order. In the solid phase, atoms are closely packed. Thus, the inter-atomic separation is very small in the crystalline phase.

35.

Estimate the average mass density of a sodium atom assuming its size to be about2.5 Angstrom. (Use the known values of Avogadro's number and the atomic mass of sodium).Compare it with the mass density of sodium in its crystalline phase : 970 kg m. Arethe two densities of the same order of magnitude ? If so, why?

Answer»

Answer:

l

Mass of each Sodium atom

Density = Mass/ VOLUME

The densities are almost of the same order. In the solid PHASE, atoms are tightly packed and thus interatomic space is very small.

>>>>> ρ=4.67×10 −3 KGM −3

It is given that the density of sodium in the CRYSTALLINE phase is 970 kg m–3.

Therefore, the densities of sodium in TWO phases is not of the same order. In the solid phase, atoms are closely packed. Thus, the inter-atomic separation is very small in the crystalline phase.

Discussion

36.	The temperature of the sun measured by using
Answer» ANSWER: PYROMETER Explanation: The TEMPERATURE of the SUN MEASURED by using pyrometer

36.

The temperature of the sun measured by using

Answer»

ANSWER:

PYROMETER

Explanation:

The TEMPERATURE of the SUN MEASURED by using pyrometer

Discussion

37.	W Rush ar pull on a body which causes the motion in thebody as opposes the motion of body is known as............
Answer» ANSWER: firction force I hope that it would help you and Mark me as the BRAINLIEST and PLEASE follow me

37.

W Rush ar pull on a body which causes the motion in thebody as opposes the motion of body is known as............

Answer»

ANSWER:

firction force

I hope that it would help you and Mark me as the BRAINLIEST and PLEASE follow me

Discussion

38.	That is reaction???state its type with brief explanation
Answer» Answer: helps U DEAR..♥♥♡ have a nice DAY dear..✌

38.

That is reaction???state its type with brief explanation

Answer»

Answer:

helps U DEAR..♥♥♡

have a nice DAY dear..✌

Discussion

39.	a man swims at a speed of 10 km/hr, river flow is 8 km/hr and river width is 600 metres. Find time to cross the river. Class 11 Physics
Answer» Answer: t =(WIDTH of ricer 0/v = (600 m) /(5//3 ms^(-1)) = 36 0 s = 6 MIN

39.

a man swims at a speed of 10 km/hr, river flow is 8 km/hr and river width is 600 metres. Find time to cross the river. Class 11 Physics

Answer»

Answer:

t =(WIDTH of ricer 0/v = (600 m) /(5//3 ms^(-1)) = 36 0 s = 6 MIN

Discussion

40.	three particles of masses 1kg 2kg 2kg are placed at corners of an equilateral triangle.the coordinates of a,b,c are (0,00(2,0) ana (x,y)the coordinates of centre of mass are
Answer» Answer: arrti kre MATA KI good MORNING Explanation: but

40.

three particles of masses 1kg 2kg 2kg are placed at corners of an equilateral triangle.the coordinates of a,b,c are (0,00(2,0) ana (x,y)the coordinates of centre of mass are

Answer»

Answer:

arrti kre MATA KI good MORNING

Explanation:

but

Discussion

41.	Question question question question question
Answer» ANSWER: UNIFORM Velocity Explanation: HOPE it HELPS you MATE.

41.

Question question question question question

Answer»

ANSWER:

UNIFORM Velocity

Explanation:

HOPE it HELPS you MATE.

Discussion

42.	Branch of Physics which deals with the motion of abody by taking into consideration the cause is known as
Answer» BRANCH of Physics which DEALS with the motion of a body by taking into consideration the cause is KNOWN as Dynamics.

42.

Branch of Physics which deals with the motion of abody by taking into consideration the cause is known as

Answer»

BRANCH of Physics which DEALS with the motion of a body by taking into consideration the cause is KNOWN as

Dynamics.

Discussion

43.	D/dx[(4x^3+1)(x^2-3)]is
Answer» ANSWER: EXPLANATION: DDX[f(g(X))] d d x [ f ( g ( x ) ) ] is f'(g(x))g'(x) f ...

43.

D/dx[(4x^3+1)(x^2-3)]is

Answer»

ANSWER:

EXPLANATION: DDX[f(g(X))] d d x [ f ( g ( x ) ) ] is f'(g(x))g'(x) f ...

Discussion

44.	A turning force of 10 N is applied to therim of a bottle lid of radius 5 cm. Calculatethe moment of the force applied.a
Answer» Answer: 10 n Explanation: HOPE it will HELP you

44.

A turning force of 10 N is applied to therim of a bottle lid of radius 5 cm. Calculatethe moment of the force applied.a

Answer»

Answer:

10 n

Explanation:

HOPE it will HELP you

Discussion

45.	0.25 In the given circuit, the equivalent capacitance between A and B is(1) C(2) 2C(3)3C(4) 4C
Answer» ANSWER: its answer is 4C HOPE its HELP you

45.

0.25 In the given circuit, the equivalent capacitance between A and B is(1) C(2) 2C(3)3C(4) 4C

Answer»

ANSWER:

its answer is 4C

HOPE its HELP you

Discussion

46.	एक कमजोर परमाणु k कक्षा में दोelectron और Lकक्षा में 4 electronऔर m कक्षा 2 में इलेक्ट्रॉनों परमाणुओं की संख्या लिखिए तत्व के M कछा से 2 electron निकाल ने पर उत्पन्न आयन का संकेत लिखें
Answer» EXPLANATION: क्वांटम यांत्रिकी में, एक परमाणु कक्षीय एक गणितीय समारोह में कहा कि या तो एक इलेक्ट्रॉन या एक परमाणु में इलेक्ट्रॉनों की एक जोड़ी की लहर की तरह व्यवहार का वर्णन करता है। इस समारोह में एक परमाणु के किसी भी इलेक्ट्रॉन पाने की संभावना की गणना करने के लिए इस्तेमाल किया जा सकता परमाणु के नाभिक के चारों ओर किसी भी विशिष्ट क्षेत्र में। अवधि , परमाणु कक्षीय , यह भी शारीरिक क्षेत्र या स्थान जहां इलेक्ट्रॉन , के रूप में कक्षीय की विशेष गणितीय रूप से परिभाषित उपस्थित होने के लिए गणना की जा सकती करने के लिए उल्लेख कर सकते हैं। एक परमाणु में प्रत्येक कक्षीय तीन क्वांटम संख्या N, ℓ , और मीटर के मूल्यों, जो क्रमशः इलेक्ट्रॉन की ऊर्जा , कोणीय गति , और एक कोणीय गति वेक्टर घटक ( चुंबकीय क्वांटम संख्या ) के अनुरूप की एक अद्वितीय सेट की विशेषता है। इस तरह प्रत्येक कक्षीय दो इलेक्ट्रॉनों के साथ अपने स्वयं के स्पिन क्वांटम संख्या प्रत्येक की एक अधिकतम द्वारा कब्जा किया जा सकता है। परमाणु कक्षाओं परमाणु कक्षीय मॉडल (वैकल्पिक रूप से बादल इलेक्ट्रॉन या लहर यांत्रिकी मॉडल के रूप में जाना जाता है) , इस मामले में इलेक्ट्रॉनों की उपसूक्ष्म व्यवहार विसशवलयिसिग के लिए एक आधुनिक ढांचे की बुनियादी इमारत ब्लॉकों हैं। इस मॉडल में एक बहु इलेक्ट्रॉन परमाणु के इलेक्ट्रॉन बादल ( सन्निकटन में) का निर्माण किया जा रहा है एक इलेक्ट्रॉन विन्यास सरल हाइड्रोजन की तरह परमाणु कक्षाओं का एक उत्पाद है कि के रूप में देखा जा सकता है

46.

एक कमजोर परमाणु k कक्षा में दोelectron और Lकक्षा में 4 electronऔर m कक्षा 2 में इलेक्ट्रॉनों परमाणुओं की संख्या लिखिए तत्व के M कछा से 2 electron निकाल ने पर उत्पन्न आयन का संकेत लिखें

Answer»

EXPLANATION:

क्वांटम यांत्रिकी में, एक परमाणु कक्षीय एक गणितीय समारोह में कहा कि या तो एक इलेक्ट्रॉन या एक परमाणु में इलेक्ट्रॉनों की एक जोड़ी की लहर की तरह व्यवहार का वर्णन करता है। इस समारोह में एक परमाणु के किसी भी इलेक्ट्रॉन पाने की संभावना की गणना करने के लिए इस्तेमाल किया जा सकता परमाणु के नाभिक के चारों ओर किसी भी विशिष्ट क्षेत्र में। अवधि , परमाणु कक्षीय , यह भी शारीरिक क्षेत्र या स्थान जहां इलेक्ट्रॉन , के रूप में कक्षीय की विशेष गणितीय रूप से परिभाषित उपस्थित होने के लिए गणना की जा सकती करने के लिए उल्लेख कर सकते हैं। एक परमाणु में प्रत्येक कक्षीय तीन क्वांटम संख्या N, ℓ , और मीटर के मूल्यों, जो क्रमशः इलेक्ट्रॉन की ऊर्जा , कोणीय गति , और एक कोणीय गति वेक्टर घटक ( चुंबकीय क्वांटम संख्या ) के अनुरूप की एक अद्वितीय सेट की विशेषता है। इस तरह प्रत्येक कक्षीय दो इलेक्ट्रॉनों के साथ अपने स्वयं के स्पिन क्वांटम संख्या प्रत्येक की एक अधिकतम द्वारा कब्जा किया जा सकता है। परमाणु कक्षाओं परमाणु कक्षीय मॉडल (वैकल्पिक रूप से बादल इलेक्ट्रॉन या लहर यांत्रिकी मॉडल के रूप में जाना जाता है) , इस मामले में इलेक्ट्रॉनों की उपसूक्ष्म व्यवहार विसशवलयिसिग के लिए एक आधुनिक ढांचे की बुनियादी इमारत ब्लॉकों हैं। इस मॉडल में एक बहु इलेक्ट्रॉन परमाणु के इलेक्ट्रॉन बादल ( सन्निकटन में) का निर्माण किया जा रहा है एक इलेक्ट्रॉन विन्यास सरल हाइड्रोजन की तरह परमाणु कक्षाओं का एक उत्पाद है कि के रूप में देखा जा सकता है

Discussion

47.	Mहकी गूंज या प्रतिनाद क्याध्वनि गुंज या पृथ्वीनाथ क्या है
Answer» ANSWER: KYA BATANA HAI.........

47.

Mहकी गूंज या प्रतिनाद क्याध्वनि गुंज या पृथ्वीनाथ क्या है

Answer»

ANSWER:

KYA BATANA HAI.........

Discussion

48.	Ques given in pic plzz give me ans with explaination
Answer» ANSWER: HELLO BRO O don't LIKE MATHS

48.

Ques given in pic plzz give me ans with explaination

Answer»

ANSWER:

HELLO BRO O don't LIKE MATHS

Discussion

49.	0. A motorboat covers a given distance in 6 hours movingdownstream on a river. It covers the same distance in10 hours moving upstream. The time it takes to coverthe same distance in still water is(a) 9 hours(b) 7.5 hours(c) 6.5 hours(d) 8 hours
Answer» Answer: b) 7.5 hours Explanation: LET velocity in STILL water be S Velocity of water be W Distance to be covered be D D=6(S+W) D=10(S−W) which gives S=4W So, D=7.5hrs.

49.

0. A motorboat covers a given distance in 6 hours movingdownstream on a river. It covers the same distance in10 hours moving upstream. The time it takes to coverthe same distance in still water is(a) 9 hours(b) 7.5 hours(c) 6.5 hours(d) 8 hours

Answer»

Answer:

b) 7.5 hours

Explanation:

LET velocity in STILL water be S

Velocity of water be W

Distance to be covered be D

D=6(S+W)

D=10(S−W)

which gives S=4W

So, D=7.5hrs.

Discussion

50.	4.In Q.3, how much distance is covered by the particlein returning to the starting point?2rLOro(2)(1)(4)(3)2a4aaaro
Answer» ANSWER: LO no. 2 is answer PLEASE BRAINLIEST answer kardena Explanation:

50.

4.In Q.3, how much distance is covered by the particlein returning to the starting point?2rLOro(2)(1)(4)(3)2a4aaaro

Answer»

ANSWER:

LO no. 2 is answer PLEASE BRAINLIEST answer kardena

Explanation:

Discussion

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Plzz give the correct ans

What type of transfer of heat takes place when water is heated

The position of a particle along x-axis at time t is given by x=1−t+t^2. The distance travelled by the particle (in 'm') in first 2 seconds is 's'.

One of the rectangular components of a velocity of 80km/h is 40km/h. Find other components.

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The force F acting on a body moving in a circular path depends on mass m of the body, velocity v and radius r of the circular path. Obtain an expression for the force by dimensional analysis (Take the value of k = 1).

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if the error in radius and length of cylinder is 2% and 3% calculate percentage in surface area and volume of cyclinder

Calculatethe current passing through a conductorelectrons flows throught it in 1 hour.

a body of mass m is moving along y-axis and it's position at time t is y= 4t^3 - 3t^2 + 2 . what type of motion the body follows (comments on its velocity, acceleration). what is the force acting on it ? give comment on the force

True / false Force can be increase ar decrease the speed of amoving body.

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Explaination of basidomyctes

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Sin 5°. sin 22°. sin 68°/ cos 22°.cos 60°. cos 85°

an object is placed infront a convex mirror of radius of curvature 20cm .its image is formed 8cm behind the mirror .find the location of the object respect to the mirror.

The velocity-time (v-t) graph for a particle in straightline motion is given below.H д6.The corresponding acceleration-time (a-t) graph willbe

Is In the absence of external farce, the inabillity ofbody to change its state by itself is called......

The temperature of the sun measured by using

W Rush ar pull on a body which causes the motion in thebody as opposes the motion of body is known as............

That is reaction???state its type with brief explanation

Question question question question question

Branch of Physics which deals with the motion of abody by taking into consideration the cause is known as

D/dx[(4x^3+1)(x^2-3)]is

A turning force of 10 N is applied to therim of a bottle lid of radius 5 cm. Calculatethe moment of the force applied.a

0.25 In the given circuit, the equivalent capacitance between A and B is(1) C(2) 2C(3)3C(4) 4C

Mहकी गूंज या प्रतिनाद क्याध्वनि गुंज या पृथ्वीनाथ क्या है

Ques given in pic plzz give me ans with explaination

0. A motorboat covers a given distance in 6 hours movingdownstream on a river. It covers the same distance in10 hours moving upstream. The time it takes to coverthe same distance in still water is(a) 9 hours(b) 7.5 hours(c) 6.5 hours(d) 8 hours

4.In Q.3, how much distance is covered by the particlein returning to the starting point?2rLOro(2)(1)(4)(3)2a4aaaro