Hopes this helps:
Answer: Because astronauts work in a weightless environment, very little muscle contraction is needed to support their bodies or move around.
Without regular use and exercise our muscles weaken and deteriorate. It’s a process called atrophy.
Have a great day.
Answer:
a) 0.9995c
b) 5641MeV
c) 91670 MeV
Explanation:
(a) The speed of approach is given by the formula:

(b) the kinetic energy is given by:
![E_k=m_0c^2[\frac{1}{\sqrt{1-\frac{v^2}{c^2}}}-1]](https://tex.z-dn.net/?f=E_k%3Dm_0c%5E2%5B%5Cfrac%7B1%7D%7B%5Csqrt%7B1-%5Cfrac%7Bv%5E2%7D%7Bc%5E2%7D%7D%7D-1%5D)
by replacing c=3*10^8m/s, m_0=1.67*10^{-27}kg we obtain:

(c) in the rest frame of the other proton we have:
![E_k=m_0c^2[\frac{1}{\sqrt{1-\frac{u^2}{c^2}}}-1]](https://tex.z-dn.net/?f=E_k%3Dm_0c%5E2%5B%5Cfrac%7B1%7D%7B%5Csqrt%7B1-%5Cfrac%7Bu%5E2%7D%7Bc%5E2%7D%7D%7D-1%5D)
by replacing we get

hope this helps!!
Answer:

Explanation:
Given,
Number of turns, N = 645 N
Area, A = 20.25 m²
Earth Magnetic field, B = 5 x 10⁻⁵ T
Maximum Emf = 1.25 V.
Angular velocity, ω = ?
Using Induced Emf formula




Angular velocity of the coil = 
Answer:
Explanation:
Given
current required 
Internal Resistance 
According to ohm law
Current flows in a conductor is directly Proportional to the voltage applied.



The 100% relative humidity in the winter feel nothing like 100% in summer because it depends on "the saturation of the temperature".
<u>Explanation:</u>
Temperature really makes a big difference. Even once warm, a cold winter air produces much less humidity than summer heat. One cubic unit of air needs 0.001 ounces of water to saturate it, to elevate its ratio to one hundred per cent.
Nevertheless, it takes 0.022 ounces of water to saturate the one cubic unit of air once the temperature is eighty, which is twenty-two times that amount of water. Air with a humidity of one hundred percent at eighty degrees holds twenty-two times as much water as air at zero with humidity at one hundred percent.