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Physics

Physics
The instrument for measuring intensity of earthquakes is called

Ergograph
Seismograph
Pantagraph
Ediograph

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Physics
The value of coefficient of restitution in perfectly elastic collision is

0.5
1
2

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Physics
Which among the following waves is used for communication by artificial satellites ?

Radio waves
Micro waves
M.
Frequency of 1016 series

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Physics
A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

100 J
50 J
150 J
75 J

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Physics
Water from soil enters into the root hairs owing to :

Atmospheric pressure
Osmotic pressure
Root pressure
Capillary pressure

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Physics
Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water

Increases slightly
Decreases slightly
Increases to a great extent
Decreases rapidly

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