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Given :

Particle has a displacement of 40m along OX in the first 5s and 30m perpendicular to OX in the next 5s.

To Find :

Average velocity of particle

Solution :

During First 5 seconds

Distance travelled = 40 m

time taken = 5 seconds

V1 = distance/time = 40/5 = 8 m/s

During Other 5 seconds

Distance travelled = 30 m

time taken = 5 seconds

V2 = distance/time = 30/5 = 6 m/s

Average velocity = ( V1 + V2 )/2

Average velocity = (8+6)/2

Average velocity = 7 m/s

or

Average velocity = Total distance travelled/ total time taken

Average velocity = ( 40+30 )/( 5+5 )

Average velocity = 70/10

Average velocity = 7 m/s

Hence , average velocity of particle is 7 m/s

So CORRECT option is B

Answer:

66.02 seconds.

Explanation:

Length of train = 100m

Bridge = 1km or 1000m

Total DISTANCE = (1000+100) m

= 1100m

Velocity = 60 km/hr

Km/hr to m/s = (60*5/18) m/s

= 16.66 m/s

Total TIME REQUIRED = Velocity = Distance/Time

= 1100 = 16.66/T

= 1100/16.66 = T

= 66.02 seconds = Time

Hope this HELPS.

ANSWER:

bzhshwvgejsishshgwgehsjsjhshdbevrvhsjshehie

EXPLANATION:

the angle between the INCIDENT ray and the reflected ray i R. 2 i. 84°. 3. If a light ray REFLECTS off a plane mirror at an ... Use a ray diagram, drawn to scale, to solve ... No, the rays do not converge at a ...

ANSWER:

BLA bla bla

Explanation:

i don't KNOW

EXPLANATION:

SINCE it is perpendicular their product will be ZERO

therefore (2x2)i+(3x4)j+(8xa) k=0

4+12+8a= 0

8a=-16

a=-2

hope you have understood

then PLEASE make it as brainlist

ANSWER:

focal point is the point where the light Ray's converge ir DIVERGE DEPENDING UPON the REFLECTING surface

1/F=1/V+1/U

u=-10

f=30

v=?

1/30-1/-10=1/F

1/30+1/10=

1+3/30=

4/30=

30/4=

7.5=F

1) carbohydrates and fats

2) osmosis

3)chloroplast

4)FOOD vacoule

5)STARCH to amylase (sugar)

6)small intestine

7) PERISTALTIC movement

8)anal sphincter

9)ethanol +CO2+energy

10) mitochondria

I hope this helps ( ╹▽╹ )

ANSWER:

X is the answear

Explanation:

Explanation:

❤️❤️❤️❤️

• The force of COHESION is defined as the force of ATTRACTION between molecules of the same substance. The force of ADHESION is defined as the force of attraction between different SUBSTANCES, such as glass and water.

hope it's helpful for you ☺️

Answer:

Fossil FUELS are the leading non-renewable energy sources AROUND the WORLD. There are others, however. NUCLEAR energy is usually considered another non-renewable energy source. Although nuclear energy itself is a renewable energy source, the material used in nuclear power plants is not.

Explanation:

Explanation:

here is your answer

• Self induction is that phenomenon in which a change in electric current in a coil PRODUCES an induced emf in the coil itself. MATHEMATICAL REPRESENTATION: ... The self inductance of a coil is one henry if a current change of one ampere PER second through it produces an emf of one VOLT in it.

hope it's helpful for you ☺️

Answer:

INTRINSIC motivation involves doing something because it's PERSONALLY rewarding to you. Extrinsic motivation involves doing something because you WANT to EARN a REWARD or avoid punishment.

Answer:

so the RESISTANCE between point A and B is 3.333333

Explanation:

i THINK you mistakenly wrote R2=2

it should be R1=2

so the current from A is distributed in two directions

so,R1,R2 is parallel resistors to R3,R4

and R1,R2 is series resistor.

so,R1+R2=2+3=5 ohms

and R3,R4 is series resistor

so,R3+R4=4+6=10 ohms

so,5ohms and 10ohms are in parallel circuit

so,1/R=1/5+1/10

so,1/R=2/10+1/10 ........ {multiply 1/5 with 2/2}

so,1/R=3/10

so,R=10/3

so,R=3.3333 ohms

Answer:

EXPLANATION:

Hydrogen + Chlorine ____________> Hydrogen Chloride

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Things we need to know

• The symbol of Hydrogen is H
• The symbol of Chlorine is CL valency 2.
• This process requires HIGH amount of heat
• Hence it is Exothermic Reaction
• The Hydrogen Chloride formed id an Acid
• This acid is Aqueous i.e Diluted due to chlorine.

Answer:

10 CLASS BOOK me HAI SCIENCE me

Answer:

1. True

2. FALSE

3. True

4. True

5. False

Newton's first LAW states that a body stays at rest if it is at rest and moves with a constant velocity unit if a net force is applied on it.

Newton's second law states that the net force applied on the body is EQUAL to the rate of change of its momentum.

F= ma

or F=m(v-u)/t

Ft=mv-mu

that is , when F=0,v=u for whatever time,t is taken .This means that the object will CONTINUE moving with uniform velocity , u Throughout the time,t.if it is ZERO than v will also be zero i.e object will remain at rest

Answer:

reasons is the degree of extensors or refinement of measurement basically describe the limitations of the measuring instrument example of measurement of 5.38 is more accurate than measurement of 5.3 METRE note measurements presence is determined by least count of measuring instrument smaller the least count greater is the PROCESS error measurement is the foundation of all experimental science and technology the result of every measurement and measuring instrument CONTAINS some can certainly this is uncertainty is called error

plz brainlist

Inertia is the name for the tendency of an object in motion to remain in motion, or an object at rest to remain at rest UNLESS acted upon by a force. This concept was quantified in Newton's FIRST Law of Motion.

Inertia is the resistance of any PHYSICAL object to any change in its velocity. This includes changes to the object's speed, or direction of motion. Thus, an object will continue moving at its CURRENT velocity until some force CAUSES its speed or direction to change.

If you satisfy on my answer please mark it BRAINLIEST ✏️✏️✏️✏️✏️✏️✏️✏️✏️✏️

ANSWER:

SORRY I DONT no this answer but I have very LESS followers can you follow me

Answer:

HEY mate !

Here's your answer :

The Potential Difference across the points of the conductor CAUSES the flow of charges.

Eg: A battery/cell is connected to a CIRCUIT in ORDER to create a potential difference and make the charges flow.

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As PER the formula

F=-kx

F=-4×0.05=-0.2

I HOPE this HELPS ( ╹▽╹ )

Answer:

LIGHT in weight

POSSES very good strength and toughness

strong, good and cheap to PRODUCE

ANSWER:

Here is the answer i HOPE it HELPS U

Answer:the VARIABLE resistor ised to vary CURRENT in a DC current is USED RHEOSTAT...

Mark me as BRAINLIST ♥️✌️♥️✌️

ANSWER:

YES it is POSSIBLE.....

Explanation:

HOPE it is helpful

Mark as brainliest,!!!!?!

ANSWER:

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Answer:

heya!

states that the acceleration of an OBJECT increases with INCREASED force and decreases with increased mass. The LAW also states that the direction in which an object accelerates is the same as the direction of the force.

pls mark it as brainlist answer

Explanation:

The LEMON taken in a beaker appears to be BIGGER than its size because of refraction. The rays of light comes from an opticaly denser medium ( beaker ) to opticly RARER medium( air ).

The light rays bends away from NORMAL and makes the lemon bigger

Answer:

Given:

Power rating of a bulb is 330V - 110W

Also the 3 bulbs are used for 5 hrs at a stretch.

To find:

Resistance of bulb , and energy consumed.

Calculation:

Power rating of any electronic DEVICE provides the ideal power GENERATED when run on a specified Voltage. In this case , when the bulb is used at 330V , we get power GENERATION of 110W.

Let power be P , voltage be V and resistance be R .

Considering that the 3 bulbs were used at specified Voltage of 330 V for 3 HOURS, we get :

EXPLANATION:

PLEASE MARK has BRAINLIEST ANSWER

Answer:

The answer is 283 Kelvin.

Explanation:

Given:c=10

To find Kelvin: Kelvin = Celsius+273

=>K=10+273

=>K=283

Therefore, the answer is 283.

I HOPE it will be helpful to you.

✨PLEASE MARK ME AS BRILLIANIST ✨

ANSWER:

SORRY didn't KNOW the answer

Explanation:

yahsjdjdjjdjdidjdjjsjsjsjdj

follow me

Answer:

To prove that electrostatic forces are conservative in nature, we show that work done in moving a unit positive TEST CHARGE over a closed path in an electric FIELD is zero. We KNOW that ALONG any path L work done in carrying unit positive charge from A to B.

Explanation:

Hope it helps

please mark as brainliest

ANSWER:

SURFACE.. TEMP.. of SUN..⬇️

➡️5801K

Answer:

bead of mass m can slide without friction on a fixed circular horizontal RING of radius 3R having centre at the point C. The bead is attached to one of the ends of spring of spring constant k. Natural LENGTH of spring is R and the other end of the spring is fixed at point O as shown in figure. Bead is released from position A, what will be kinetic energy of the bead when it reaches at point B?

question

December 27, 2019avatar

Preethiga Sajeev

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ANSWER

Given,

mass of bead =m

radius of circular horizontal ring =3R

natural length of spring =R

According to conservation law of energy,

KE

i

+PE

i

=KE

f

+PE

f

⇒0+

2

1

k[OA−R]

2

=KE

f

+

2

1

k[OB−R]

2

⇒

2

1

−k[5R−R]

2

=KE

f

+

2

1

k[R−R]

2

⇒KE

f

=8kR

2

.

solution

December 27, 2019

avatar

Toppr

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Practice IMPORTANT Questions

UPTU 2017 Physics

50 Qs

Solve related Questions

System shown in the figure is released from rest. Pulley and spring is massless and friction is absent EVERYWHERE. The speed of 5 kg block when 2kg block leaves the CONTACT with ground is (take force constant of string = K=40 N/m and g=10 m/s

2

):

1 Verified Answer

In the diagram shown, the blocks A and B are of the same mass M and the mass of the block C is M

1

. Friction is present only under the block A. The whole system is suddenly released from the state of rest. The minimum coefficient of friction to keep the block A in the state of rest is equal to

1 Verified Answer

Answer:

From the question,

we have (0,0),(3,0) and (0,4) to be the co-ordinates of MASS 1kg,1.5kg and 2.5kg (assuming 1kg at origin)

X

com

is given by

∑mi

∑mixi

=

1+1.5+2.5

1×0+1.5×3+2.5×0

=

5

4.5

=0.9cm

Y

com

is given by

∑mi

∑miyi

=

1+1.5+2.5

1×0+1.5×0+2.5×4

=

5

2.5×4

=

2

4

=2cm

∴ The centre of mass is 0.9 CM to the right and 2 cm above the mass of 1kg

option (D) is CORRECT

ANSWER:

1 VOLT is the CORRECT answer

HOPE it HELPS

Answer:

Momentum can be thought of as the "POWER" when a body is MOVING, meaning how much force it can have on another body. For EXAMPLE, a bowling BALL (large mass) moving very slowly (low velocity) can have the same momentum as a BASEBALL (small mass) that is thrown fast (high velocity).

option... (3) AVO METER...........

HOPE THIS HELPS........

SAKKU@b❣

Answer:

F(-1) = 3(-1) + 4(-1)² - 2

= -3 +4 -2

f(-1) = -1

Answer:

COULOMB'S LAW ....it's a DEFINATION of class 12 PHYSICS 1st chapter .

ANSWER:

The SIZE of the UNIVERSE is UNKNOWN......

1) The 3 main factors that affect BAROMETRIC (air) pressure are: Temperature. ALTITUDE or Elevation. Moisture ow WATER VAPOUR.

Brainlist yrr.

ANSWER:

2 is the CORRECT answer

Answer:

Repulsive force of magnitude 6 × 10−3 N

Charge on the first sphere, q1 = 2 × 10−7 C

Charge on the second sphere, q2 = 3 × 10−7 C

Distance between the spheres, R = 30 cm = 0.3 m

Electrostatic force between the spheres is given by the relation:

F = (1/4πε0). (q1q2)/ (r2)

Where, ε0 = Permittivity of FREE space and (1/4πε0) =9 × 109 Nm2C−2

Therefore, force F = (9 × 109 × 2 × 10−7)/ ((0.3)2)

= 6 × 10−3N

Hence, force between the two small charged spheres is 6 × 10−3 N. The charges are of same nature. Hence, force between them will be repulsive.

HEY mate HOPE it helps you.

The answer is

B. Total distance ÷ Total time