According to quantum theory of light, photons are _______?

A. Waves

B. Particles

C. Energy packets

D. Electromagnetic

The average acceleration caused by gravity per second is____________?

A. 22 feet

B. 32 feet

C. 52 feet

D. 42 feet

The Reason for a Swimming Pool to appear Less Deep than the actual depth is__________?

A. Refraction

B. Light scattering

C. Reflection

D. Interference

Which statement about sound is true?

A. Sound can’t travel through  vacuum

B. Sound can’t travel through glass

C. Sound can’t travel through water

D. Non of theses

Which type of motions are present in solid?

A. translational

B. rotational

C. vibrational

D. all of these

Sound travels_______ in solid materials then liquid?

A. Constant

B. Slowest

C. Fastest

D. None of these

In the electricity meter the digit to the extreme right is___________?

A. 1/5th of the unit

B. 1/100 of the unit

C. 1/10th of the unit

D. 1/1000th of the unit

Units of electricity consumed by 2500 watt air-conditioner in one hour are_________?

A. 25 units

B. 2.25 units

C. 2.5 units

D. 0.25 units

It is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of__________?

A. An equal and opposite pressure acts from inside

B. of the height of a man

C. of gravity

D. Earth pulls the man upward

In general, wind speed of 10-13 kph caused——-?