12 pts needing help with this physics question
1 answer:
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Answer:
m = 2.01[kg]
Explanation:
This problem can be solved using Newton's second law which tells us that the force applied on a body is equal to the product of mass by acceleration.
where:
F = force = 12.5 [N]
m = mass [kg]
a = acceleration = 6.2 [m/s²]
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
<h2>Answer: faster </h2>
The speed of sound varies depending on the medium through which the sound waves travel. In addition, it varies with changes in the temperature of the medium. This is because an <u>increase in temperature means that the frequency of interactions between the particles that transport the vibration increases</u>, hence this increase in activity increases the speed. That is why the speed of sound in a gas is not constant, but depends on the temperature.
So, if we want <u>the speed of sound in a gas to increase</u>, the<u> temperature</u> of that gas must <u>increase</u>, as well.
For example, the higher the air temperature, the greater the velocity of propagation. Experiments have shown that the speed of sound in air increases for every
increase in temperature.
Therefore:
<h2>The speed of sound will be faster than in December</h2>