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Physics

Physics
Increased wind speed is accompanied by a reduced air ________

Humidity
Pressure
Density
Aridity

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Physics
Lakes freeze in cold countries in winter, leaving the water underneath at

0°C
4°C
0°F
4°F

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Physics
Which law is also called law of inertia ?

Newton third law
All of above
Newton first law
Newton second law

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Physics
A copper disc has a hole. If the disc is heated, the size of the hole

Increases
Decreases
First increases and than decreases
No change

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Physics
A body absorbs heat most if it is

Black and smooth
White and smooth
White and rough
Black and rough

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Physics
If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is

12 cm
24 cm
1 cm
6 cm

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