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Q:

In a sound wave compressions are regions where density _________________________

A) as well as pressure is high B) as well as pressure is low
C) is high and pressure is low D) is low and pressure is high
 
Answer & Explanation Answer: A) as well as pressure is high

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Q:

When ice floats on water, its _____ part remains outside the water.

A) 0.5 B) 0.3
C) 0.1 D) 1
 
Answer & Explanation Answer: C) 0.1

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Q:

A ball rolling along the ground gradually slows down and finally comes to rest is due to ________.

A) Friction B) Magnetic force
C) Electrostatic force D) Muscular force
 
Answer & Explanation Answer: A) Friction

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Q:

A transformer can do all of the following except

A) step­-up a/c voltage B) step­-up a/c current
C) step­-up a/c power D) step­-down a/c voltage
 
Answer & Explanation Answer: C) step­-up a/c power

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Q:

Which term is not associated with sound wave?

A) Hertz B) Decibel
C) Candela D) Mach
 
Answer & Explanation Answer: C) Candela

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1 1863
Q:

A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

A) The liquid surface falls down on the direction of motion and rises up on the back side of the tank B) The liquid surface falls down only at the center of the tank
C) The surface of the liquid remains horizontal D) None
 
Answer & Explanation Answer: A) The liquid surface falls down on the direction of motion and rises up on the back side of the tank

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0 1862
Q:

The time taken by a pendulum to complete one oscillation is called its?

A) Maximum speed B) Average speed
C) Time period D) Time interval
 
Answer & Explanation Answer: C) Time period

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3 1860
Q:

At what distance from the earth is gravity zero

Answer

Gravitational force is the force that binds everything at the surface of the earth. It holds at what distance from the earth is gravity zero. 

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