Astronauts aboard the ISS move at about 8000 m/s, relative to us when we look upward. How long does an astronaut need to stay aboard the space station to be a full second youngerthan people on the ground? Please show and explain how you would set-up the problem, before you actually try to solve it. If you cannot solve it exactly, please try to offer an estimate.(5 pts)

#_time = 7.5 10⁴ s

Explanation:

In order for the astronaut to be younger than the people on earth, it follows that the speed of light has a constant speed in vacuum (c = 3 108 m / s), therefore with the expressions of special relativity we have.

            t =

where t_p is the person's own time in an immobile reference frame,

let's calculate

we assume that the speed of the space station is constant

             t_ =  0.99998666657   s

therefore the time change is

             Δt = t - t_p

             Δt = 1 - 0.9998666657                  

              Δt = 1.3333 10⁻⁵ s

this is the delay in each second, therefore we can use a direct rule of proportions. If Δt was delayed every second, how much second (#_time) is needed for a total delay of Δt = 1 s

               #_time = 1 / Δt

               #_time =

               #_time = 7.5 10⁴ s

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.