If the lens is convex image cannot be virtual
Answer:
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Answer:
46.9 C
Explanation:
The heat released by the gold bar is equal to the heat absorbed by the water:
where:
is the mass of the gold bar
is the specific heat of gold
is the initial temperature of the gold bar
is the mass of the water
is the specific heat of water
is the initial temperature of the water
is the final temperature of both gold and water at equilibrium
We can re-arrange the formula and solve for T_f, so we find:
Answer:
Explanation:
given,
speed of length of travel = 0.86 c
length of tunnel = 88 m
Assume length of super train = 205 m
An observer at rest in the tunnel's reference frame will observe the train's length to be contracted:
L' = L₀ / γ
L' is the length the observer measures,
L₀ is the proper length of the train