Physics Questions

Q:

The capacity of a water heater is measured in

A) Gallons B) Liters
C) Meters D) Both A & B
 
Answer & Explanation Answer: D) Both A & B

Explanation:

The capacity of a water heater is measured in Gallons or Liters. In the USA, it is measured in Gallons and in India, we measure it in Liters.

Hence, if the capacity of the water heater is 15 gallons or 15 liters, then it says that it can hold 15 gallons or 15 liters of water.

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Q:

Rear view mirror of car is convex or concave?

A) Convex B) Concave
C) Both A & B D) Can't be determined
 
Answer & Explanation Answer: A) Convex

Explanation:

The side view mirror, in all the vehicles we use only convex mirror. This mirror makes the objects and small to show them in the mirror. That's why in all such mirrors, "Ojects in the mirror are closer than they appear."

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Q:

Gamma rays are emanations that have

A) charge but no mass B) neither mass nor charge
C) both mass and charge D) mass but no charge
 
Answer & Explanation Answer: B) neither mass nor charge

Explanation:

A gamma ray or gamma radiation, is a penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy.

Gamma rays are emanations that have neither mass nor charge.

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Q:

Instrument for measuring work performed is called _________.

A) Eudiometer B) Anemometer
C) Hyetometer D) Ergometer
 
Answer & Explanation Answer: D) Ergometer

Explanation:
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Q:

Exerts a force on anything that has an electric charge

A) Electric field B) Electrostatic force
C) Inductive field D) All of the above
 
Answer & Explanation Answer: A) Electric field

Explanation:
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Q:

Conservation of energy refers to the fact that

A) if you conserve energy you will not be as tired B) energy cannot be created or destroyed but can be converted from one form to another
C) no chemical reaction is 100 percent efficient D) the entropy of the universe is always increasing
 
Answer & Explanation Answer: B) energy cannot be created or destroyed but can be converted from one form to another

Explanation:

"Conservation of energy" refers to the fact that energy cannot be created or destroyed but can be converted from one form to another.

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Q:

A projectile launched at____ degree angle has the greatest range?

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Q:

The law of conservation of energy states that

A) energy can neither be created nor destroyed B) energy can either be created nor destroyed
C) energy can neither be created or destroyed D) energy can either be created or destroyed
 
Answer & Explanation Answer: A) energy can neither be created nor destroyed

Explanation:

The law of conservation of energy is a law of science which states that energy can neither be created nor destroyed - only converted from one form of energy to another.

In 1842, Julius Robert Mayer discovered the Law of Conservation of Energy.

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