Physics, 16.07.2021 09:20 jamesmith20
Two astronauts are taking a spacewalk outside the International Space
Station. The first astronaut has a mass of 85.2 kg. The second has a mass of
65.4 kg. Initially, both astronauts have zero velocity relative to each other.
Then, the astronauts push against each other, giving the first astronaut a final
velocity of 1.2 m/s to the left. If the momentum of the system is conserved,
what is the final velocity of the second person?
O A. 1.6 m/s to the right
B. 1.6 m/s to the left
O c. 1.3 m/s to the left
O D. 1.3 m/s to the right
Answers: 3
Physics, 21.06.2019 17:10
Space-time metric ds2= -dt2+at2dx2+bt2dy2+ct2dz2 (a)how does the area of a rectangle with vertices at ( x=0, y=0, z=0 ), (1,0,0 ), ( 0,1,0 ) and (1,1,0 ) changes with time? (b) if a photon moving in the x direction starts from the origin at t=1, when does it reach x=l? (ds=0 for the trajectory of a photon.) (c) the proper time for a particle is defined by cd=ds. what is the proper time for a particle to move along the trajectory ( x(t)=t, y(t)=0, z(t)=0 ) from t=0 to 1 ? what is the condition on the parameter a so that the velocity of the particle never exceeds the speed of light ?
Answers: 2
Physics, 22.06.2019 07:20
If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?
Answers: 3
Two astronauts are taking a spacewalk outside the International Space
Station. The first astronaut...
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