840J
3360J
3420J
4200J
7560J
Correct answer is E
No explanation has been provided for this answer.
Which of the following statements is correct about light and sound waves? Both
are longitudinal waves
are transverse waves
have the same velocity in air
need a medium for propagation
transmit energy
Correct answer is E
No explanation has been provided for this answer.
0.05s
1.00s
2.00s
3.14s
6.28s
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements about a gas is NOT correct?
It has no definite shape
It is compressible
Its molecules are closely packed
Its molecules gain kinetic energy when heated
Its molecules move about randomly
Correct answer is C
No explanation has been provided for this answer.
0.179km
0.357km
3.150km
6.300km
12.600km
Correct answer is D
No explanation has been provided for this answer.
A body accelerating will have a constant speed if it is
falling from a height
in equilibrium
moving in a circular path
moving in a straight line
oscillating
Correct answer is C
No explanation has been provided for this answer.
Which of the following statements about water is NOT correct?
Pure water freezes at 0°C under normal pressure
The volume of a given mass of water at 0° is less than its volume at 4°C
Water boils at a definite temperature
Water evaporates at all temperatures
Water has its maximum density at 4°C
Correct answer is B
Water has its least volume and highest density at 4°C
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