# Physics Quiz

Everyday Physics
3.3
English
Published
4 months ago

## What phenomenon is explained in the Video?

Reflection

Refraction

Diffraction

Critical angle The return of light or sound waves from a surface is called reflection

## Why did the coin not come along the paper?

Due to Inertia

Coin is too heavy

There is magnet beneath table

Coin is not linked with Paper Objects at rest, tends to remain at rest is called inertia

## Under what phenomenon does the door open?

Torque

Force

circular motion

Push Torque is a measure of the force that can cause an object to rotate about an axis

## Which of the following is neither a scalar nor a vector?

Dielectric constant

Force

Angular Momentum

Torque These quantizes don't follow law of vector addition. Dielectric is a tensor quantity

## What does Newton's first law tell us?

The definition of force

The measure of force

The forces always exist in pairs

The total quantity of motion First law of motion gives the definition of force.

## What type of force is non-conservative?

Frictional Force

Gravitational Force

Strong Force

Electromagnetic Forces Friction is non-conservative because the amount of work done by friction depends on the path

## How much energy is in a thunderbolt of lightning?

one billion joules

250000 joules

500 Joules

3000 Joules An average bolt of lightning, striking from cloud to ground, contains roughly one billion joules of eneregy

## Why does the sea level rise at night?

Moon's gravity

Sun's gravity

Sea breezes

Global Warming The sea level rises at night because of the influence of the moon's gravity

## Why are there winds?

Temperature differences

Air flows from high density to low density.

air flows along isobars

air flows down-hill The temperature difference at different areas of land cause change in atmospheric pressure. Hence Winds flow

## What is the speed of gravity?

gravity travels at the speed of light

gravity travels at 9.8 meters per second per second

(32 feet) per second per second

gravity travels at twice of speed of light According to Einstein's General Relativity, gravity travels at the speed of light.
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