8444 + Interview Questions in Primary School in Physics Page 16 InterviewSolution

751.	pleaseplease solve this guys and it is the numerical of physics of the chapter physical quantity and measurement and you have to solve this means it is written there find a volume of density bottle so you have to find the volume and density bottle with the above measurements and the b1 and b1 also density of liquid so you have to find all the streets of please find
Answer» ANSWER: DENSITY liquid Explanation: jrtkgfjkkkgdfhllggklggd

751.

pleaseplease solve this guys and it is the numerical of physics of the chapter physical quantity and measurement and you have to solve this means it is written there find a volume of density bottle so you have to find the volume and density bottle with the above measurements and the b1 and b1 also density of liquid so you have to find all the streets of please find

Answer»

ANSWER:

DENSITY liquid

Explanation:

jrtkgfjkkkgdfhllggklggd

Discussion

752.	friends please answer it then I mark as brainlist unitary method Kaise kiya jata hai hindi me explain karea
Answer» ANSWER: SORRY MATE I DONT answer

752.

friends please answer it then I mark as brainlist unitary method Kaise kiya jata hai hindi me explain karea

Answer»

ANSWER:

SORRY MATE I DONT answer

Discussion

753.	7. Which of the following graphs represent uniform motion and motion with constant acceleration? Give reasons
Answer» EXPLANATION: GOOD NIGHT...........

753.

7. Which of the following graphs represent uniform motion and motion with constant acceleration? Give reasons

Answer»

EXPLANATION:

GOOD NIGHT...........

Discussion

754.	A 200gm ball thrown from a height of 200m from the surface. Find the time taken by the ball to touch the surface. Also, find the velocity of the ball at that time.
Answer» GIVEN : Mass of ball (m) = 200 g = 0.2 kg Height (h) = 200 m Initial velocity (u) = 0 m/s Acceleration due to GRAVITY (g) = 10 m/s² To FIND : Time taken by the ball to touch the surface. Final velocity of the ball. SolutioN : Use 2nd equation of motion : $\implies \rm{s = ut + \dfrac{1}{2} gt^2} \\ \\ \\ \implies \rm{200 = 0 \times t + \bigg( \dfrac{1}{2} \times 10 \times t^2 \bigg) } \\ \\ \\ \implies \rm{200 = 0 + 5 t^2} \\ \\ \\ \implies \rm{5t^2 = 200} \\ \\ \\ \implies \rm{t^2 = \dfrac{200}{5}} \\ \\ \\ \implies \rm{t^2 = 40} \\ \\ \\ \implies \rm{t = \sqrt{40}} \\ \\ \\ \implies \rm{t = 6.324} \\ \\ \\ \large \implies {\boxed{\rm{t \: \approx \: 6.3 \: s}}}$ ________________________ Now, use 1st equation of motion : $\implies \rm{v = u + gt} \\ \\ \\ \implies \rm{v = 0 + 10 \times 6.3} \\ \\ \\ \large \implies {\boxed{\rm{v \: = \: 63 \: ms^{-1}}}}$

754.

A 200gm ball thrown from a height of 200m from the surface. Find the time taken by the ball to touch the surface. Also, find the velocity of the ball at that time.

Answer»

GIVEN :

Mass of ball (m) = 200 g = 0.2 kg
Height (h) = 200 m
Initial velocity (u) = 0 m/s
Acceleration due to GRAVITY (g) = 10 m/s²

To FIND :

Time taken by the ball to touch the surface.
Final velocity of the ball.

SolutioN :

Use 2nd equation of motion :

$\implies \rm{s = ut + \dfrac{1}{2} gt^2} \\ \\ \\ \implies \rm{200 = 0 \times t + \bigg( \dfrac{1}{2} \times 10 \times t^2 \bigg) } \\ \\ \\ \implies \rm{200 = 0 + 5 t^2} \\ \\ \\ \implies \rm{5t^2 = 200} \\ \\ \\ \implies \rm{t^2 = \dfrac{200}{5}} \\ \\ \\ \implies \rm{t^2 = 40} \\ \\ \\ \implies \rm{t = \sqrt{40}} \\ \\ \\ \implies \rm{t = 6.324} \\ \\ \\ \large \implies {\boxed{\rm{t \: \approx \: 6.3 \: s}}}$

________________________

Now, use 1st equation of motion :

$\implies \rm{v = u + gt} \\ \\ \\ \implies \rm{v = 0 + 10 \times 6.3} \\ \\ \\ \large \implies {\boxed{\rm{v \: = \: 63 \: ms^{-1}}}}$

Discussion

755.	in an electronic balance mass of an object is compared with masses of standard weights true or false
Answer» in an electronic BALANCE mass of an OBJECT is compared with masses of standard weights TRUE or false : this is the true statements . follow me on this app and send me a thanks and BECOME the brainlist but I also wants to become a brainlist so follow me on this app bye I will me at next question of yours if you will follow me okay bye

755.

in an electronic balance mass of an object is compared with masses of standard weights true or false

Answer»

in an electronic BALANCE mass of an OBJECT is compared with masses of standard weights TRUE or false : this is the true statements .

follow me on this app and send me a thanks and BECOME the brainlist but I also wants to become a brainlist so follow me on this app bye I will me at next question of yours if you will follow me okay bye

Discussion

756.	please please answer this question it is of physics and it is the numerical of the chapter physical quantities and measurement for becoming brainliest answer answer correctly and fast
Answer» Answer: volume of density bottle. EXPLANATION: PLZ MARK me as BRIANLIEST

756.

please please answer this question it is of physics and it is the numerical of the chapter physical quantities and measurement for becoming brainliest answer answer correctly and fast

Answer»

Answer:

volume of density bottle.

EXPLANATION:

PLZ MARK me as BRIANLIEST

Discussion

757.	A. Fill in the blank spaces by choosing the1.2.3.OBJECTIVE TYPE QUESTIONcorrect words from the list given below:List : consequential, gravitation, shape, pull,sail boat.1. On the application of force on a woodenblock, it moves closer to us. The force soapplied is the force of2. When a spring is stretched, the forcechanges theof the spring.3. The force which stops a rolling ball on theground is aforce.4. The force possessed by fast moving wind4D. Ticis used to drive a5. The force ofalwaysattracts a body.B. Write true or false against the statementsgiven below:1. A force of push always makes a body to
Answer» SEND me QUESTION SEPARATELY

Discussion

758.	please please answer this question it is of physics and it is the numerical of the chapter physical quantities and measurement for becoming brainliest answer answer correctly and fast
Answer» answer 1(45ml) 2. (7/9 GRAM per cc) 3 (also7/9 gram per cc) solution volume of bottle=volume of water that can STORED in it=mass of water by DENSITY which is EQUAL to (45/1)ML........{density of water=1g per cc}

758.

please please answer this question it is of physics and it is the numerical of the chapter physical quantities and measurement for becoming brainliest answer answer correctly and fast

Answer»

answer 1(45ml)

2. (7/9 GRAM per cc)

3 (also7/9 gram per cc)

solution

volume of bottle=volume of water that can STORED in it=mass of water by DENSITY

which is EQUAL to (45/1)ML........{density of water=1g per cc}

Discussion

759.	400gram package lying on a horizontal surface is attached to a horizontal string which passes over a smooth pulley. When a mass of 200grams is attached to the other end of the string, the package is on the point of moving. Find , the coefficient of friction. i will mark the person brainliest etc etc
Answer» M1g = 0.4 9.8 = 3.92 N. = Wt. of pkg.= Normal force(Fn). FP = 3.92sin 0 = 0 = Force parallel to the SURFACE. [email protected]#$%^& = M2g = 0.2 * 9.8 = 1.96 N. = Force applied. Fs = USFn. = 3.92us. [email protected]#$%^&-Fp-Fs = Ma. 1.96-0-3.92us = M*0 = 0, us = 0.50.

759.

400gram package lying on a horizontal surface is attached to a horizontal string which passes over a smooth pulley. When a mass of 200grams is attached to the other end of the string, the package is on the point of moving. Find , the coefficient of friction. i will mark the person brainliest etc etc

Answer»

M1*g = 0.4 * 9.8 = 3.92 N. = Wt. of pkg.= Normal force(Fn).

FP = 3.92*sin 0 = 0 = Force parallel to the SURFACE.

[email protected]#$%^& = M2*g = 0.2 * 9.8 = 1.96 N. = Force applied.

Fs = US*Fn. = 3.92us.

[email protected]#$%^&-Fp-Fs = M*a.

1.96-0-3.92us = M*0 = 0, us = 0.50.

Discussion

760.	Convert;i)6 km into cm ii)80 mm into dam. please answer me first i will make you branliest
Answer» 600000CM 0.00080 MM MARK AS BRAINLIEST PLZ $\huge\blue{BY educatorvs}$ $\huge\blue{BY educatorvs}$ $[THANKS mate]$

760.

Convert;i)6 km into cm ii)80 mm into dam. please answer me first i will make you branliest

Answer»

600000CM
0.00080 MM

MARK AS BRAINLIEST PLZ

$\huge\blue{BY educatorvs}$

$\huge\blue{BY educatorvs}$ $[THANKS mate]$

Discussion

761.	Properties of liquid pressure
Answer» Characteristics of Liquid Pressure ✴️ Liquids exert pressure on the walls of the Container in which they are stored or kept. ✴️ The pressure exerted by a liquid is Directly Proportional to is *Density. More* the Density of the Liquid, Greater is the Pressure exerted by it. ✴️ Pressure exerted by a Liquid increases with *Depth. ✴️ A liquid* exerts the same pressure in all Directions at all Points lying at a Given Depth inside the Liquid. ✴️ Liquids SEEK their own level regardless of the Shape and Cross Sectional Areas of their Vessels. Hope HELPS You ✌️ Please MARK as the Brainliest !!

761.

Properties of liquid pressure

Answer»

Characteristics of Liquid Pressure

✴️ Liquids exert pressure on the walls of the Container in which they are stored or kept.

✴️ The pressure exerted by a liquid is Directly Proportional to is Density. More the Density of the Liquid, Greater is the Pressure exerted by it.

✴️ Pressure exerted by a Liquid increases with Depth.

✴️ A liquid exerts the same pressure in all Directions at all Points lying at a Given Depth inside the Liquid.

✴️ Liquids SEEK their own level regardless of the Shape and Cross Sectional Areas of their Vessels.

Hope HELPS You ✌️

Please MARK as the Brainliest !!

Discussion

762.	Is gas is diffuse in water
Answer» Gases can dissolve in water. The dissolving of a gas in water DEPENDS on the interaction between the MOLECULES of the gas and the water molecules. The AMOUNT of gas that can be DISSOLVED in water depends on the temperature of the water.

762.

Is gas is diffuse in water

Answer»

Gases can dissolve in water. The dissolving of a gas in water DEPENDS on the interaction between the MOLECULES of the gas and the water molecules. The AMOUNT of gas that can be DISSOLVED in water depends on the temperature of the water.

Discussion

763.	3. What conclusion can you draw about the motion, velocity and acceleration of a body from the displacementtime graph given above ? Give reason for your answer.Guys that broken word is DISPLACEMENT
Answer» Answer: From the above GRAPH, we conclude that the body is in uniform motion, has constant VELOCITY, and '0' i.e. no acceleration. If any doubts, please ASK. I'll TRY my BEST to clear them.

763.

3. What conclusion can you draw about the motion, velocity and acceleration of a body from the displacementtime graph given above ? Give reason for your answer.Guys that broken word is DISPLACEMENT

Answer»

Answer:

From the above GRAPH, we conclude that the body is in uniform motion, has constant VELOCITY, and '0' i.e. no acceleration. If any doubts, please ASK. I'll TRY my BEST to clear them.

Discussion

764.	Whatislinear expansion ?
Answer» Answer: LINEAR EXPANSION means change in ONE DIMENSION as opposed to change in volume.

764.

Whatislinear expansion ?

Answer»

Answer:

LINEAR EXPANSION means change in ONE DIMENSION as opposed to change in volume.

Discussion

765.	A box of mass 6kg is placed on a table. The coefficient of static friction between the box and the table is 0.4. Will the box move if an external horizontal force of 30N is applied on it? ill mark ppl as brainliest etc etc pls solve correctly and pls dont spam
Answer» ok ok I am WRITING it correctly In this activity you will solve problems involving friction. You will combine the model F ≤ μR with Newton’s Second Law and the constant acceleration equations. Information sheet The friction model Friction acts tangentially along surfaces in contact, in the DIRECTION that opposes motion. Before sliding occurs: friction is just sufficient to maintain equilibrium and PREVENT motion. F < FMAX On the point of sliding and when sliding occurs: F = μR where F is the friction FORCE acting between two surfaces in contact, μ is the coefficient of friction, and R is the normal contact force. (Note that sometimes N is used instead of R for the normal contact force.) You can use the friction model to determine whether a body will slide, what force will be required to make a body slide, or to find the coefficient of friction between two surfaces in contact. Example A 5 kg box on a horizontal table is pushed by a horizontal force of 15 N as shown on the right. If the coefficient of friction is 0.4, will the box move? Think about What is the SMALLEST force that could make the box slide along the table? Solution The sketch shows the forces acting on the box. Note that the weight of a box of mass 5 kg is 5g where g = 9.8 ms–2 Since the vertical forces are in equilibrium, R = 5g Therefore the maximum possible friction is F = μR = 0.4  5g = 19.6 N The pushing force, 15 N, is less than this and so cannot overcome the friction. The box will not move. I have given the answer so folk me send me thanks

765.

A box of mass 6kg is placed on a table. The coefficient of static friction between the box and the table is 0.4. Will the box move if an external horizontal force of 30N is applied on it? ill mark ppl as brainliest etc etc pls solve correctly and pls dont spam

Answer»

ok ok I am WRITING it correctly

In this activity you will solve problems involving friction. You will combine

the model F ≤ μR with Newton’s Second Law and the constant acceleration

equations.

Information sheet The friction model

Friction acts tangentially along surfaces in contact, in the DIRECTION that

opposes motion.

Before sliding occurs:

friction is just sufficient to maintain equilibrium and PREVENT motion.

F < FMAX

On the point of sliding and when sliding occurs:

F = μR

where F is the friction FORCE acting between two surfaces in contact,

μ is the coefficient of friction, and R is the normal contact force.

(Note that sometimes N is used instead of R for the normal contact force.)

You can use the friction model to determine whether a body will slide, what

force will be required to make a body slide, or to find the coefficient of

friction between two surfaces in contact.

Example

A 5 kg box on a horizontal table is pushed by a horizontal force

of 15 N as shown on the right.

If the coefficient of friction is 0.4, will the box move?

Think about

What is the SMALLEST force that could make the box slide along the table?

Solution

The sketch shows the forces acting on the box.

Note that the weight of a box of mass 5 kg is 5g where g = 9.8 ms–2

Since the vertical forces are in equilibrium, R = 5g

Therefore the maximum possible friction is F = μR = 0.4  5g = 19.6 N

The pushing force, 15 N, is less than this and so cannot overcome the

friction.

The box will not move.

I have given the answer so folk me send me thanks

Discussion

766.	Liquid pressure depends on what......
Answer» Answer: Pressure within a liquid depends only on the density of the liquid, the acceleration due to GRAVITY, and the depth within the liquid. The pressure exerted by such a static liquid INCREASES linearly with increasing depth. Explanation: Hope it will help you PLESE MARK me brilliant

766.

Liquid pressure depends on what......

Answer»

Answer:

Pressure within a liquid depends only on the density of the liquid, the acceleration due to GRAVITY, and the depth within the liquid. The pressure exerted by such a static liquid INCREASES linearly with increasing depth.

Explanation:

Hope it will help you PLESE MARK me brilliant

Discussion

767.	How we can see the non luminous object?
Answer» We can identify a NON LUMINOUS OBJECT by checking if it EMITS light or no

Discussion

768.	a toy car was moving with a speed of 20cm/s.Its speed became 50m/s after traversing a distance of 1m .Calculate the acceleration of the car
Answer» ANSWER: 1050m Explanation: USING IDENTITY V2 - U2 =2as V=50 U=30 S=1 5050-2020=2a1 2500-400=2a 2100=2a a=2100/2 a=1050

768.

a toy car was moving with a speed of 20cm/s.Its speed became 50m/s after traversing a distance of 1m .Calculate the acceleration of the car

Answer»

ANSWER: 1050m

Explanation: USING IDENTITY V2 - U2 =2as

V=50

U=30

S=1

50*50-20*20=2*a*1

2500-400=2a

2100=2a

a=2100/2

a=1050

Discussion

769.	How is friction offered by fluids different from that offered by solid surfaces
Answer» Answer: Friction helps in HOLDING bodies on the surface which is NECESSARY for activities like walking ETC. it causes wear and tear but it has benefits also.So it is a necessary evil. Fluid friction and this property of liquid is called it's viscosity. Fluid friction does not have any grip so here we can GET know that Solid friction DIFFERS from Liquid friction

769.

How is friction offered by fluids different from that offered by solid surfaces

Answer»

Answer:

Friction helps in HOLDING bodies on the surface which is NECESSARY for activities like walking ETC. it causes wear and tear but it has benefits also.So it is a necessary evil.

Fluid friction and this property of liquid is called it's viscosity.

Fluid friction does not have any grip so here we can GET know that Solid friction DIFFERS from Liquid friction

Discussion

770.	How do we see non-luminous object?
Answer» Answer: ........... Explanation: if the external light come through it and then in your eyes then it will visible otherwise blow torch to see it

770.

How do we see non-luminous object?

Answer»

Answer:

...........

Explanation:

if the external light come through it and then in your eyes then it will visible

otherwise blow torch to see it

Discussion

771.	I. Calculate the total distance covered by the body.ii. What type of motion expressed between points B&C?iii.Which part of the car shows zero acceleration?iv. calculate the acceleration produced,v. What is the maximum speed of the car?
Answer» ANSWER: the DIAGRAM is not CLEAR

771.

I. Calculate the total distance covered by the body.ii. What type of motion expressed between points B&C?iii.Which part of the car shows zero acceleration?iv. calculate the acceleration produced,v. What is the maximum speed of the car?

Answer»

ANSWER:

the DIAGRAM is not CLEAR

Discussion

772.	A force of 98N is able to just move a body of mass 28kg on a rough horizontal surface. Calculate the coefficient of static friction. ill mark the person thanks brainliest etc etc pls answer fast and no spamming pls
Answer» ANSWER: Here , MAXIMUM possible value of friction = μmg = 98 N We GET , coefficient of friction , μ = 0.5. Now , ANGLE of friction = tan−1(μ) = tan−1(0.5) = 26.56∘

772.

A force of 98N is able to just move a body of mass 28kg on a rough horizontal surface. Calculate the coefficient of static friction. ill mark the person thanks brainliest etc etc pls answer fast and no spamming pls

Answer»

ANSWER:

Here , MAXIMUM possible value of friction = μmg

= 98 N

We GET , coefficient of friction , μ = 0.5.

Now , ANGLE of friction = tan−1(μ)

= tan−1(0.5)

= 26.56∘

Discussion

773.	How to finad time period
Answer» ANSWER: finad TIME period Explanation:

773.

How to finad time period

Answer»

ANSWER:

finad TIME period

Explanation:

Discussion

774.	Why is light reffered as a form of energy?
Answer» Explanation: Light energy is a form of ELECTROMAGNETIC radiation. Light consists of photons, which are produced when an object's ATOMS heat up. Light travels in waves and is the only form of energy visible to the human eye. energy is defined as ability to do work in the PHYSICAL world, hence light can be termed without any doubt a form of energy, the interactions are electromagnetic in nature, a photons can excite an electron,can cause work. plz mark me as the brainliest give my thanks to my all answers given in answer option in my profile anyone who will give thanks❤ to all my answer in BRAINLY they will get 5000 points free really.i am promising भाई मैं प्रॉमिस कर रहा हूं और सच बता रहा हूं कि जो भी मेरा प्रोफाइल में जाकर सभी आंसर को थैंक्स दे देगा वह 5000 पॉइंट फ्री में पाएगा i am promising अरे भाई जल्दी thanks❤❤ दीजिए ना plz

774.

Why is light reffered as a form of energy?

Answer»

Explanation:

Light energy is a form of ELECTROMAGNETIC radiation. Light consists of photons, which are produced when an object's ATOMS heat up. Light travels in waves and is the only form of energy visible to the human eye.

energy is defined as ability to do work in the PHYSICAL world, hence light can be termed without any doubt a form of energy, the interactions are electromagnetic in nature, a photons can excite an electron,can cause work.

plz mark me as the brainliest

give my thanks to my all answers given in answer option in my profile

anyone who will give thanks❤ to all my answer in BRAINLY they will get 5000 points free

really.i am promising

भाई मैं प्रॉमिस कर रहा हूं और सच बता रहा हूं कि जो भी मेरा प्रोफाइल में जाकर सभी आंसर को थैंक्स दे देगा वह 5000 पॉइंट फ्री में पाएगा

i am promising

अरे भाई जल्दी thanks❤❤ दीजिए ना plz

Discussion

775.	In hydroelectric dams the ......... energy of flowing water is transformed into electric energy
Answer» Explanation: Kinetic Energy in use. A hydro-electric power dam uses the CONCEPT of kinetic energy in fast flowing water to produce electricity. TAKE a look at how a basic hydro-electric power dam is SET up in the diagram below. 1. Water from a stream or river is HELD up (blocked) by the sluice gate. Holding up more water increases.

775.

In hydroelectric dams the ......... energy of flowing water is transformed into electric energy

Answer»

Explanation:

Kinetic Energy in use. A hydro-electric power dam uses the CONCEPT of kinetic energy in fast flowing water to produce electricity. TAKE a look at how a basic hydro-electric power dam is SET up in the diagram below. 1. Water from a stream or river is HELD up (blocked) by the sluice gate. Holding up more water increases.

Discussion

776.	Calculate the pressure produced by a force of 800 N acting on an area of 2.0 m2. ill mark the person brainliest and thanks etc etc
Answer» <P>EXPLANATION: ANSWER is 400pascal Pressure=F/A(n/m^2) So here P= 800/2= 400pascal

776.

Calculate the pressure produced by a force of 800 N acting on an area of 2.0 m2. ill mark the person brainliest and thanks etc etc

Answer»

<P>EXPLANATION:

ANSWER is 400pascal

Pressure=F/A(n/m^2)

So here P= 800/2= 400pascal

Discussion

777.	A gum bottle rests on its base. If it is placedupside down, how does the (i) thrust, (ii) pressurechange?
Answer» ANSWER: Pressure is the thrust exerted by a body of a SURFACE per unit area. ... In the CASE of a GUM bottle like in the picture attached, the area of its BASE when it is upside down, is more than when it is upright, hence the pressure will decrease. Explanation: hope it helps.....!

777.

A gum bottle rests on its base. If it is placedupside down, how does the (i) thrust, (ii) pressurechange?

Answer»

ANSWER:

Pressure is the thrust exerted by a body of a SURFACE per unit area. ... In the CASE of a GUM bottle like in the picture attached, the area of its BASE when it is upside down, is more than when it is upright, hence the pressure will decrease.

Explanation:

hope it helps.....!

Discussion

778.	2. Name two natural sources of light and two human-made sources of light.
Answer» Answer: Two NATURAL RESOURCES of light are - sun , moon two natural resources of man MADE source of light - ELECTRIC lamps , bulb. hope it HELPS you ✔✔ be brainly ✔✔ keep asking ✔✔

778.

2. Name two natural sources of light and two human-made sources of light.

Answer»

Answer:

Two NATURAL RESOURCES of light are - sun , moon

two natural resources of man MADE source of light - ELECTRIC lamps , bulb.

hope it HELPS you ✔✔

be brainly ✔✔

keep asking ✔✔

Discussion

779.	What is resattant force
Answer» Answer: a resultant FORCE is the single force and ASSOCIATED torque obtained by combining a SYSTEM of FORCES and torques acting on a rigid body. The defining feature of a resultant force, or resultant force-torque, is that it has the same effect on the rigid body as the original system of forces. pls mark my answer as brain list and follow me

779.

What is resattant force

Answer»

Answer:

a resultant FORCE is the single force and ASSOCIATED torque obtained by combining a SYSTEM of FORCES and torques acting on a rigid body. The defining feature of a resultant force, or resultant force-torque, is that it has the same effect on the rigid body as the original system of forces.

pls mark my answer as brain list and follow me

Discussion

780.	What is the total distance covered by the body at the end of the journey as shown in the graph.75 m67.5 m100 mnone of the above
Answer» Given: A velocity time graph is given . To Find: The total displacement covered by the body at the end of the journey. Concept Used: As we know that the area of ( v - t ) graph gives US displacement , so we will be finding the area of the graph . Answer: (For graph refer to the attachment:) We can here find the area of the graph in THREE steps , Firstly finding area of ∆ ABE . Secondly finding area of rectangle BCEF. Thirdly finding area of ∆ DFC . Note:On finding area power of dimension will be 1 . $\red{\bf{\leadsto Step\:1}}$ Finding area of ∆ ABE Here , HEIGHT = 15m/s. Base = 2s $\sf{\implies ar(\Delta ABE )= \dfrac{1}{2}\times (base)\times (height) }$ $\sf{\implies ar(\Delta ABE )= \dfrac{1}{2}\times 2 s\times 15m/s}$ $\boxed{\red{\bf{\longmapsto ar(\triangle ABE )= 15m}}}$ $\rule{200}5$ $\red{\bf{\leadsto Step\:2}}$ Finding area of rectangle BCEF Here , BREADTH = (5-2)s = 3s. Length = 15m/s. $\sf{\implies ar(BCEF) = (length)\times (breadth)}$ $\sf{\implies ar(BCEF) = 3s \times 15m/s }$ $\boxed{\red{\bf{\longmapsto ar( BCEF)= <klux>45M</klux>}}}$ $\rule{200}5$ $\red{\bf{\leadsto Step\:3}}$ Finding area of ∆ DFC. Here , Height = 15m/s. Base = (6-5)s = 1s. $\sf{\implies ar(\Delta DFC) = \dfrac{1}{2}\times (base)\times (height) }$ $\sf{\implies ar(\Delta DFC)= \dfrac{1}{2}\times 1 s\times 15m/s}$ $\boxed{\red{\bf{\longmapsto ar(\triangle DFC )= 7.5m}}}$ $\rule{200}5$ Hence total area = displacement = ar(∆DFC) + ar(BCEF) + ar(∆ABE). = 15m + 45m + 7.5m = 67.5m. Hence the total displacement is 67.5m .

780.

What is the total distance covered by the body at the end of the journey as shown in the graph.75 m67.5 m100 mnone of the above

Answer»

Given:

A velocity time graph is given .

To Find:

The total displacement covered by the body at the end of the journey.

Concept Used:

As we know that the area of ( v - t ) graph gives US displacement , so we will be finding the area of the graph .

Answer:

(For graph refer to the attachment:)

We can here find the area of the graph in THREE steps ,

Firstly finding area of ∆ ABE .
Secondly finding area of rectangle BCEF.
Thirdly finding area of ∆ DFC .

Note:On finding area power of dimension will be 1 .

$\red{\bf{\leadsto Step\:1}}$ Finding area of ∆ ABE

Here ,

HEIGHT = 15m/s.
Base = 2s

$\sf{\implies ar(\Delta ABE )= \dfrac{1}{2}\times (base)\times (height) }$

$\sf{\implies ar(\Delta ABE )= \dfrac{1}{2}\times 2 s\times 15m/s}$

$\boxed{\red{\bf{\longmapsto ar(\triangle ABE )= 15m}}}$

$\rule{200}5$

$\red{\bf{\leadsto Step\:2}}$ Finding area of rectangle BCEF

Here ,

BREADTH = (5-2)s = 3s.
Length = 15m/s.

$\sf{\implies ar(BCEF) = (length)\times (breadth)}$

$\sf{\implies ar(BCEF) = 3s \times 15m/s }$

$\boxed{\red{\bf{\longmapsto ar( BCEF)= <klux>45M</klux>}}}$

$\rule{200}5$

$\red{\bf{\leadsto Step\:3}}$ Finding area of ∆ DFC.

Here ,

Height = 15m/s.
Base = (6-5)s = 1s.

$\sf{\implies ar(\Delta DFC) = \dfrac{1}{2}\times (base)\times (height) }$

$\sf{\implies ar(\Delta DFC)= \dfrac{1}{2}\times 1 s\times 15m/s}$

$\boxed{\red{\bf{\longmapsto ar(\triangle DFC )= 7.5m}}}$

$\rule{200}5$

Hence total area = displacement

= ar(∆DFC) + ar(BCEF) + ar(∆ABE).

= 15m + 45m + 7.5m

= 67.5m.

Hence the total displacement is 67.5m .

Discussion

781.	Why is it easy to cut vegetables with sharp knife???
Answer» ANSWER: Pressure is INVERSELY proportional to Area, the more the area, the LESS the pressure and the less the area, the more the pressure. A sharp knife has less area, thus pressure applied will be more , and that's why it's easier to cut Vegetables with a sharp knife than a BLUNT knife , even if we apply same force.

781.

Why is it easy to cut vegetables with sharp knife???

Answer»

ANSWER:

Pressure is INVERSELY proportional to Area, the more the area, the LESS the pressure and the less the area, the more the pressure. A sharp knife has less area, thus pressure applied will be more , and that's why it's easier to cut Vegetables with a sharp knife than a BLUNT knife , even if we apply same force.

Discussion

782.	Solve fast please....
Answer» Answer: cork (0.24g/cm³), WATER (1g/cm³), IRON (7.86g/cm³), Brass (8.73g/cm³), MERCURY (13.56g/cm³). Hope this helps... PLEASE mark me brainliest

782.

Solve fast please....

Answer»

Answer:

cork (0.24g/cm³), WATER (1g/cm³), IRON (7.86g/cm³), Brass (8.73g/cm³), MERCURY (13.56g/cm³).

Hope this helps...

PLEASE mark me brainliest

Discussion

783.	ramesh and suresh each weight 40kg and 50kr respectively though they have the same foot size. While standing on the ground, who will exert more pressure on the ground? Why?
Answer» Answer: No,Suresh will EXERT more PRESSURE on ground because he is WEIGHTER than Ramesh.

783.

ramesh and suresh each weight 40kg and 50kr respectively though they have the same foot size. While standing on the ground, who will exert more pressure on the ground? Why?

Answer»

Answer:

No,Suresh will EXERT more PRESSURE on ground because he is WEIGHTER than Ramesh.

Discussion

784.	Solve... please... thanks.....
Answer» ANSWER: HI friend EXPLANATION: PIZ FOLLOWING me

784.

Solve... please... thanks.....

Answer»

ANSWER:

HI friend

EXPLANATION:

PIZ FOLLOWING me

Discussion

785.	The most reactive metal is 1. Fe 2. Zn 3. Al 4. K
Answer» ANSWER: POTASSIUM (K) is the most REACTIVE METAL.

785.

The most reactive metal is 1. Fe 2. Zn 3. Al 4. K

Answer»

ANSWER:

POTASSIUM (K) is the most REACTIVE METAL.

Discussion

786.	Of these, the least dense metal is ___________. 1. Hg 2. Au 3. Cu 4. Na
Answer» EXPLANATION: mercury is the DENSE METAL whose SYMBOL is hg

786.

Of these, the least dense metal is ___________. 1. Hg 2. Au 3. Cu 4. Na

Answer»

EXPLANATION:

mercury is the DENSE METAL whose SYMBOL is hg

Discussion

787.	Water sprinkler used for grass lawns begins to rotate as soon as the water is supplied. How is that even possible? Do you have any idea about the principle on which it works?
Answer» ANSWER: GIFT for you too my LIFE is my life

787.

Water sprinkler used for grass lawns begins to rotate as soon as the water is supplied. How is that even possible? Do you have any idea about the principle on which it works?

Answer»

ANSWER:

GIFT for you too my LIFE is my life

Discussion

788.	A force of 98N is able to just move a body of mass 28kg on a rough horizontal surface. Calculate the coefficient of static friction.
Answer» ANSWER: COEFFICIENT = 10/28 Explanation: N=Mg= 28x9.8 f= coefficient X normal f= coefficient x 28X 9.8 also, f=98N 98= coefficient x 28 x 9.8 980/98= coefficient x 28 10/28= coefficient

788.

A force of 98N is able to just move a body of mass 28kg on a rough horizontal surface. Calculate the coefficient of static friction.

Answer»

ANSWER:

COEFFICIENT = 10/28

Explanation:

N=Mg= 28x9.8

f= coefficient X normal

f= coefficient x 28X 9.8

also, f=98N

98= coefficient x 28 x 9.8

980/98= coefficient x 28

10/28= coefficient

Discussion

789.	A submarine emits a sonar pulse, which returns from an underwater cliff in 1 second.If the speed of sound in salt water is 1530 m/s, how far away is the cliff?
Answer» HEY MATE HERE'S YOUR ANSWER PLZ REFER TO THE ABOVE THE ABOVE ATTACHMENT ❤️ WHATS YOUR NAME AND YOUR CLASS?❤️❤️❤️ WILL YOU BE MY BESTIE❤️❤️❤️ I PURPLE YOU ❤️❤️❤️ HOPE IT HELPED YOU ❤️

789.

A submarine emits a sonar pulse, which returns from an underwater cliff in 1 second.If the speed of sound in salt water is 1530 m/s, how far away is the cliff?

Answer»

HEY MATE HERE'S YOUR ANSWER

PLZ REFER TO THE ABOVE THE ABOVE ATTACHMENT ❤️

WHATS YOUR NAME AND YOUR CLASS?❤️❤️❤️

WILL YOU BE MY BESTIE❤️❤️❤️

I PURPLE YOU ❤️❤️❤️

HOPE IT HELPED YOU ❤️

Discussion

790.	A car starts from rest and acquire a velocity of 54km/hr in two sec,find1-acceleration2-distance travelled by car assume motion of car is uniform3-if the mass of the car is 1000kg what is the force acting on it
Answer» Answer: 1 - a = 7.5 m/sec SQUARE 2 - DISTANCE = 15 m

790.

A car starts from rest and acquire a velocity of 54km/hr in two sec,find1-acceleration2-distance travelled by car assume motion of car is uniform3-if the mass of the car is 1000kg what is the force acting on it

Answer»

Answer:

1 - a = 7.5 m/sec SQUARE

2 - DISTANCE = 15 m

Discussion

791.	(2) A toy car is moving at a speed of 20 meters per second. After covering a distance of one meter, the speed of this vehicle becomes 50 meters per second. Find the Acceleration of the vehicle.Please help meNot give bad answers please
Answer» Answer: 20 kmph Explanation: UNIFORM MOTION HAI ISKA to

791.

(2) A toy car is moving at a speed of 20 meters per second. After covering a distance of one meter, the speed of this vehicle becomes 50 meters per second. Find the Acceleration of the vehicle.Please help meNot give bad answers please

Answer»

Answer:

20 kmph

Explanation:

UNIFORM MOTION HAI ISKA to

Discussion

792.	What is maintainability ? in Engineeringplease answer me fast
Answer» Answer: In engineering, MAINTAINABILITY is the ease with which a PRODUCT can be maintained in order to: correct defects or their cause, repair or replace faulty or worn-out components without having to replace still working parts, ... MAKE FUTURE maintenance EASIER, or. cope with a changed environment. Explanation: PLEASE MARK AS BRAINLIST ANSWER

792.

What is maintainability ? in Engineeringplease answer me fast

Answer»

Answer:

In engineering, MAINTAINABILITY is the ease with which a PRODUCT can be maintained in order to: correct defects or their cause, repair or replace faulty or worn-out components without having to replace still working parts, ... MAKE FUTURE maintenance EASIER, or. cope with a changed environment.

Explanation:

PLEASE MARK AS BRAINLIST ANSWER

Discussion

793.	The inter particles space is maximum in _______ and minimum in _______.
Answer» ❤Answer Gases, Solid Mark as *BRAINLIEST*......❤❤

793.

The inter particles space is maximum in _ and minimum in _.

Answer»

❤Answer

Gases, Solid

Mark as BRAINLIEST......❤❤

Discussion

794.	What is the theory of relativity please explain
Answer» ANSWER: Einstein's Theory of General Relativity. ... In 1905, ALBERT Einstein determined that the LAWS of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum was independent of the motion of all observers. This was the theory of special relativity.

794.

What is the theory of relativity please explain

Answer»

ANSWER:

Einstein's Theory of General Relativity. ... In 1905, ALBERT Einstein determined that the LAWS of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum was independent of the motion of all observers. This was the theory of special relativity.

Discussion

795.	_____ do not have fixed shape and volume.
Answer» ❤Answer Gases Mark as *BRAINLIEST*......❤❤

795.

_____ do not have fixed shape and volume.

Answer»

❤Answer

Gases

Mark as BRAINLIEST......❤❤

Discussion

796.	Please don't spam just tell correct Answer
Answer» ANSWER: answer is AGARA in the QUESTION

796.

Please don't spam just tell correct Answer

Answer»

ANSWER:

answer is AGARA in the QUESTION

Discussion

797.	How should we reduce the distance between two bodies so that force of gravitation becomes half?
Answer» Answer: We should reduce the distance by $\sqrt{2}$ TIMES the original distance. Explanation: As PER the LAW of gravitation, the FORCE Gravitational force bet ween 2 bodies is given by - F = $\frac{Gm_1 m_{2} }{r^{2} }$ Where , M1 and m2 are the masses of the 2 bodies and r is the distance between them. Now let the distance for which the F becomes 1/2 = $r^{'}$ A/C to question- $\frac{Gm_1 m_2}{r^'^{2}}$ = 1/2* $\frac{Gm_1*m_2}{r^{2} }$ Therefore r'= $\sqrt{2}$ r

797.

How should we reduce the distance between two bodies so that force of gravitation becomes half?

Answer»

Answer:

We should reduce the distance by $\sqrt{2}$ TIMES the original distance.

Explanation:

As PER the LAW of gravitation, the FORCE Gravitational force bet ween 2 bodies is given by -

F = $\frac{Gm_1 *m_{2} }{r^{2} }$ Where , M1 and m2 are the masses of the 2 bodies

and r is the distance between them.

Now let the distance for which the F becomes 1/2 = $r^{'}$

A/C to question-

$\frac{Gm_1* m_2}{r^'^{2}}$ = 1/2* $\frac{Gm_1*m_2}{r^{2} }$

Therefore r'= $\sqrt{2}$ r

Discussion

798.	A circular track has a circumference of 3140m with ab as one of its diameter. a scooterist moves from along the circular path with a uniform speed of 10m/s.find distance covered by the scooterist ,displacement of thescooterist and time taken in reaching from a to b.
Answer» Hi friend, This is your required answer. Given, Circumference of circular track=2=3140m where r=radius of circle Now according to question,Scooter MOVES from a to b along the circular PATH (where ab is diameter).It means scooter COMPLETES half a revolution(circumference/2). So, Distance travelled=The ACTUAL path traversed by scooter=2/2=3140/2=1570 m Again, Displacement=The shortest distance travelled by scooter(Final position-Initial position)=Diameter of the circle=2r Since 2=3140m (here =3.14) 2r=3140/3.14=1000 m. To calculate the time TAKEN by the scooter in reaching from a to b,we have a formula Speed=Distance/Time Time=Distance/Speed=1570/10=157 seconds. Hope this helps you..☺☺

798.

A circular track has a circumference of 3140m with ab as one of its diameter. a scooterist moves from along the circular path with a uniform speed of 10m/s.find distance covered by the scooterist ,displacement of thescooterist and time taken in reaching from a to b.

Answer»

Hi friend,

This is your required answer.

Given,

Circumference of circular track=2=3140m

where r=radius of circle

Now according to question,Scooter MOVES from a to b along the circular PATH (where ab is diameter).It means scooter COMPLETES half a revolution(circumference/2).

So,

Distance travelled=The ACTUAL path traversed by scooter=2/2=3140/2=1570 m

Again,

Displacement=The shortest distance travelled by scooter(Final position-Initial position)=Diameter of the circle=2r

Since 2=3140m (here =3.14)

2r=3140/3.14=1000 m.

To calculate the time TAKEN by the scooter in reaching from a to b,we have a formula

Speed=Distance/Time

Time=Distance/Speed=1570/10=157 seconds.

Hope this helps you..☺☺

Discussion

799.	Particles of ______ has maximum kinetic energy.
Answer» ❤Answer Gases Mark as *BRAINLIEST*.....❤❤

799.

Particles of ______ has maximum kinetic energy.

Answer»

❤Answer

Gases

Mark as BRAINLIEST.....❤❤

Discussion

800.	Particles of _______ has maximum kinetic energy.
Answer» ANSWER: steam The PARTICLES of steam has highest kinetic energy because steam is in the FORM of gases in which the particles of gases are much APART from one another. The space between the particles of gases are very large. The force of attraction between the particles of gases is almost negligible. The particles of gases are free to move in any DIRECTION.

800.

Particles of _______ has maximum kinetic energy.

Answer»

ANSWER:

steam

The PARTICLES of steam has highest kinetic energy because steam is in the FORM of gases in which the particles of gases are much APART from one another. The space between the particles of gases are very large. The force of attraction between the particles of gases is almost negligible. The particles of gases are free to move in any DIRECTION.

Discussion

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HEY MATE HERE'S YOUR ANSWER

PLZ REFER TO THE ABOVE THE ABOVE ATTACHMENT ❤️

WHATS YOUR NAME AND YOUR CLASS?❤️❤️❤️

WILL YOU BE MY BESTIE❤️❤️❤️

I PURPLE YOU ❤️❤️❤️

HOPE IT HELPED YOU ❤️

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What is the theory of relativity please explain

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A circular track has a circumference of 3140m with ab as one of its diameter. a scooterist moves from along the circular path with a uniform speed of 10m/s.find distance covered by the scooterist ,displacement of thescooterist and time taken in reaching from a to b.

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friends please answer it then I mark as brainlist unitary method Kaise kiya jata hai hindi me explain karea

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in an electronic balance mass of an object is compared with masses of standard weights true or false

please please answer this question it is of physics and it is the numerical of the chapter physical quantities and measurement for becoming brainliest answer answer correctly and fast

please please answer this question it is of physics and it is the numerical of the chapter physical quantities and measurement for becoming brainliest answer answer correctly and fast

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Solve... please... thanks.....

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_____ do not have fixed shape and volume.

Please don't spam just tell correct Answer

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Particles of _______ has maximum kinetic energy.