Why is it incorrect to say that astronauts are weightlesS in space while orbiting Earth in a space shuttle?

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?

True or false: the revolution of the earth creates day and night as it rotates around the sun

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body