mass of the earth is 6×10^24 kg and iys radius is 6400km. find acceleration due to gravity of the earth and weight of an object of an mass 50kg kept on tje surface of the earth​

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

This is the number of complete movements of a wave per second.