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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 noise level of normal conversation?

 A) About 60 dB B) About 70 dB C) About 80 dB D) About 90 dB

Answer & Explanation Answer: A) About 60 dB

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3 222
Q:

As an object falls freely its ___________________.

 A) kinetic energy gets converted into potential energy B) potential energy gets converted into kinetic energy C) momentum gets converted into gravitational force D) gravitational force gets converted into momentum

Answer & Explanation Answer: B) potential energy gets converted into kinetic energy

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0 6404
Q:

Due to an acceleration of 1  $m/s2$, the velocity of a body increases from 5 m/s to 10 m/s in a certain period. Find the displacement (in m) of the body in  that period.

 A) 125 B) 37.5 C) 62.5 D) 75

Answer & Explanation Answer: B) 37.5

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2 267
Q:

What is measured with the Nephometer?

 A) volume of rainfall B) Cloud volume and speed C) Salinity of Sea D) All options are correct.

Answer & Explanation Answer: B) Cloud volume and speed

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1 2631
Q:

What is the standard room temperature in Kelvin?

 A) 98 K B) 198 K C) 273 K D) 373 K

Answer & Explanation Answer: A) 98 K

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0 1617
Q:

An object, starting from rest, moves with constant acceleration of 4 m/s2. After 8 s, its speed is

 A) 16 m/s B) 8 m/s C) 32 m/s D) 4 m/s

Answer & Explanation Answer: C) 32 m/s

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0 191
Q:

1 watt is equal to 1 ____________

 A) J s-1 B) J s C) J s-2 D) J

Answer & Explanation Answer: A) J s-1

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1 3039
Q:

A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

 A)  25 B)  37.5 C)  50 D)  75

Answer & Explanation Answer: D)  75

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0 270