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Physics

Physics
What is the value of 1 kW = ?

100 W
10 W
10000 W
1000 W

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Physics
The pitch of sound depends on its

Amplitude
Frequency
Intensity
Velocity

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Physics
A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?

Conduction and radiation only
Conduction and convection only
Conduction, convection and radiation
Convection and radiation only

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Physics
A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)

200 J
100 J
0 J
400 J

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Physics
Which one of the following ray has minimum wavelength

Utraviolet ray
Cosmic ray
X-rays
Gamma ray

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Physics
Water is not suitable as a calorimetric substance because it :

Is a good conductor
Low latent heat of vapourization
Has high specific heat
Has high boiling point

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