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Physics

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
The density of the liquid when heated

May increase of decrease depending on pressure
Increases
Does not change
Decreases

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Physics
Ultrasound devices operate with minimum frequency from

35 kHz
60 kHz
20kHz
45 kHz

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Physics
The GPS device in an automobile uses which communication channel?

Microwave
Infrared
Radio frequency
Satellite

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Physics
What does the slope of a velocity time graph represent?

Speed
Acceleration
Distance
Momentum

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Physics
In which form is the supplied heat energy stored during change in temperature of substance?

Heat energy
Potential energy
Both kinetic and potential energy
Kinetic energy

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