3
Q:

Which is a common first indicator of an approaching thunderstorm?

A) too hot B) heavy wind
C) a buildup of dark clouds D) lightning

Answer:   C) a buildup of dark clouds



Explanation:

The first indicator of an approaching thunderstorm is a buildup of dark clouds.

A thunderstorm is a storm with lightning and thunder; it is usually produced by heavy rain, gusty wind, and the cumulonimbus cloud. The thunderstorm is made up of moisture, unstable air and lift.

Subject: Physics
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Q:

What is the name of the phenomena (driven by the scattering of light) in which mountain tops acquire a rosy or orange hue around sunrise and sunset?

 

A) Brillouin scattering   B) Circle of confusion  
C) Alpenglow   D) Barrel distortion  
 
Answer & Explanation Answer: C) Alpenglow  

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Q:

What is the name of the phenomena in physics and astronomy which involves the splitting of a spectral line into two or morecomponents of slightly different frequency when the light source is placed in a magnetic field?

 

A) Lumen Effect   B) Alpenglow Effect  
C) Zeeman Effect   D) Raman Effect  
 
Answer & Explanation Answer: C) Zeeman Effect  

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Q:

The product of mass and velocity is called:

 

A) Potential energy B) Momentum
C) Force D) Kinetic energy
 
Answer & Explanation Answer: B) Momentum

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1 488
Q:

Complete the following.
1 kwh = ..........?

 

A) 36 × 10-6 J B) 3.6 × 10-6 J
C) 3.6 × 106 J D) 36 × 106 J
 
Answer & Explanation Answer: C) 3.6 × 106 J

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Q:

A body is falling from a height of 200 m. After it has fallen 100 m, the body will possess:

 

A) less kinetic energy and more potential energy. B) Zero potential energy and half Kinetic energy
C) more kinetic energy and less potential energy. D) half potential energy and half kinetic energy.
 
Answer & Explanation Answer: D) half potential energy and half kinetic energy.

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Q:

What is the upward force exerted by the water on the bottle containing it called?

 

A) Tension B) Buoyant Force
C) Thrust D) Pressure
 
Answer & Explanation Answer: B) Buoyant Force

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Q:

Energy possessed by an object of mass 10 kg when it is at a height of 8 m above the ground. Given g=9.8 ms-2

 

A) 784 J B) 588 J
C) 520 J D) 528 J
 
Answer & Explanation Answer: A) 784 J

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Q:

How much work is done in moving a charge of 4 C across two points having a potential difference of 12 V?

 

A) 48 J B) 3 J
C) 40 J D) 12 J
 
Answer & Explanation Answer: A) 48 J

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