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Q:

The force which makes a vehicle to stop when break is applied is called

A) gravitational force B) vander­walls force
C) frictional force D) co­valant force
 
Answer & Explanation Answer: C) frictional force

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Q:

The shortest distance measured from the initial to the final position of an object is known as the _________________.

A) motion B) direction
C) velocity D) displacement
 
Answer & Explanation Answer: D) displacement

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Q:

What is impulse equal to?

A) Change in momentum B) Change in force
C) Change in velocity D) Change in acceleration
 
Answer & Explanation Answer: A) Change in momentum

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Q:

When the vibrating object moves forward, it creates a region of high pressure in the medium called ______.

A) dilation B) compression
C) relaxation D) negation
 
Answer & Explanation Answer: B) compression

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Q:

Nautical miles is a unit of distance used in

A) Navigation B) Road mile
C) Astronomy D) Measuring the boundaries of a nation
 
Answer & Explanation Answer: A) Navigation

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Q:

The energy that generates wind comes from what source?

A) Anemometers B) Solar radiation
C) Ocean currents D) None of the above
 
Answer & Explanation Answer: B) Solar radiation

Explanation:

Wind is nothing but the form of moving air. It is caused by the uneven heating of the earth's surface by the sun. Hence, the energy that generates wind comes from solar radiation.

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Q:

______________ of a wave is the rate of transfer of energy per unit area perpendicular to the direction of travel of the wave.

A) Interference B) Rectification
C) Intensity D) Diffraction
 
Answer & Explanation Answer: C) Intensity

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Q:

Density of water is maximum at ______.

A) 12 degree Celsius B) 8 degree Celsius
C) 4 degree Celsius D) 0 degree Celsius
 
Answer & Explanation Answer: C) 4 degree Celsius

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