The time rate of loss of heat by a body is proportional to the
temperature of its surroundings
temperature of the body
difference in temperature between the body and its surroundings
ratio of the temperature of the body to that of its surroundings
Correct answer is C
No explanation has been provided for this answer.
In the diagram shown, which of the simple pendulum will resonate with P when set into oscillation?
U
T
R and T
Q and R
Correct answer is B
No explanation has been provided for this answer.
20 years
10 years
2 years
24 years
Correct answer is A
No explanation has been provided for this answer.
30V
70V
50V
40V
Correct answer is D
No explanation has been provided for this answer.
100J
150J
50J
200J
Correct answer is C
From the law of conservation of linear momentum,
\(m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2\)
Since the collision is inelastic, we have
\((0.05 \times 200) - (0.95 \times 0) = (0.05 + 0.95)V\)
\(10 = V\)
\(V = 10ms^{-1}\)
Hence the Kinetic energy = \(\frac{1}{2} (0.05 + 0.95) \times 10^2\)
= \(\frac{1}{2} \times 100\)
= 50J
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