Predict whether the hottest part of a room will be near the ceiling, in the center, or near the floor, given that there is a hot
2 answers:
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Solution :
The distance between the starting point and the end point, = 10 light years
But due to the relativistic motion of Bob and Charlie, the distance will be reduced following the Lorentz contraction. The contracted length will be different since they are moving with different speeds.
For Bob,
Speed of Bob's rocket with respect to Alice,
So the distance appeared to Bob due to the length contraction,
Therefore, the time required to finish the race by Bob is
= 10.143 year
For Charlie,
Speed of Charlie's rocket with respect to Alice,
So the distance appeared to Charlie due to the length contraction,
The time required to finish the race by Charlie is
= 5.77 year
Answer:
The explosive force experienced by the shell inside the barrel is 23437500 newtons.
Explanation:
Let suppose that shells are not experiencing any effect from non-conservative forces (i.e. friction, air viscosity) and changes in gravitational potential energy are negligible. The explosive force experienced by the shell inside the barrel can be estimated by Work-Energy Theorem, represented by the following formula:
(1)
Where:
- Explosive force, measured in newtons.
- Barrel length, measured in meters.
- Mass of the shell, measured in kilograms.
,
- Initial and final speeds of the shell, measured in meters per second.
If we know that ,
,
and
, then the explosive force experienced by the shell inside the barrel is:
The explosive force experienced by the shell inside the barrel is 23437500 newtons.