9
Q:

# Which one of the following groups have quantities that do not have the same dimensions

 A) pressure, stress B) velocity, speed C) force, impulse D) work, energy

Answer:   C) force, impulse

Explanation:
Subject: Physics
Q:

If the velocity of a body is doubled its momentum ________________.

 A) remains same B) doubles C) becomes half D) becomes 4 times

Answer & Explanation Answer: B) doubles

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2 3108
Q:

A body of mass 8 kg is moving with a velocity of 4 m/s, find its momentum.

 A) 2 B) 64 C) 32 D) 4

Answer & Explanation Answer: C) 32

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0 3301
Q:

Ozone at the higher level of the atmosphere is a product of ______ acting on oxygen molecules.

 A) IR radiation B) UV radiation C) gamma rays D) x-rays

Answer & Explanation Answer: B) UV radiation

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1 5322
Q:

'Torr' is a unit of _______.

 A) force B) energy C) power D) pressure

Answer & Explanation Answer: D) pressure

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6 4144
Q:

What is the velocity of sound in air?

 A) 343 m/sec B) 110 m/sec C) 220 m/sec D) 232 m/sec

Answer & Explanation Answer: A) 343 m/sec

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4 3811
Q:

The power of a lens is —2.5 D. The type of lens and its focal length are respectively:

 A) Convex, -0.40 m B) Concave, -0.40 m C) Concave, 0.40 m D) Convex, 0.40 m

Answer & Explanation Answer: B) Concave, -0.40 m

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0 3907
Q:

Which one of the following is the unit of force?

 A) Pascal B) Watt C) Joule D) Newton

Answer & Explanation Answer: D) Newton

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0 3351
Q:

Which of the following are Mechanical waves?

 A) X rays B) Radio waves C) Microwaves D) Sound waves

Answer & Explanation Answer: D) Sound waves

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4 4566