Answer:
hange in value is because the observer and the source has a relatively high speed
Explanation:
The emission of a molecular with is always the same, the reason why they change in value is because the observer and the source has a relatively high speed.
As the energy of the beam varies inversely with the wavelength, this shift is due to the fact that the earth and the cloud are moving away from each other.
If we want to find the velocity eta value we must use the relativistic Doppler effect
f ’= fs √ [(1- v / c) / (1 + v / c)]
Because of gravity and friction.
Answer:
b) True. the force of air drag on him is equal to his weight.
Explanation:
Let us propose the solution of the problem in order to analyze the given statements.
The problem must be solved with Newton's second law.
When he jumps off the plane
fr - w = ma
Where the friction force has some form of type.
fr = G v + H v²
Let's replace
(G v + H v²) - mg = m dv / dt
We can see that the friction force increases as the speed increases
At the equilibrium point
fr - w = 0
fr = mg
(G v + H v2) = mg
For low speeds the quadratic depended is not important, so we can reduce the equation to
G v = mg
v = mg / G
This is the terminal speed.
Now let's analyze the claims
a) False is g between the friction force constant
b) True.
c) False. It is equal to the weight
d) False. In the terminal speed the acceleration is zero
e) False. The friction force is equal to the weight
1 second - 32m
2 second - 84m
3 second - 156m
4 second - 248m
Hope this helps