Physics, 08.05.2021 17:00, janyak048janyak048
At the gym, a man pulls a bar on a machine that works the muscles of the upper back. It takes him 0.5 seconds to raise 30 kilograms of weights a vertical distance of 0.5 meters. Which of these exerts the same power output? (Estimate g as 10 m/s2.)
A) lifting 25 kilograms a distance of 2.4 meters in 2.0 seconds
B) lifting 45 kilograms a distance of 2.4 meters in 3.0 seconds
C) leg pressing 45 kilograms a distance of 0.5 meters in 0.5 seconds
D) bench pressing 30 kilograms a distance of 0.5 meter in 1.5 seconds
Answers: 3
Physics, 21.06.2019 21:30, genyjoannerubiera
Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?
Answers: 3
Physics, 22.06.2019 03:00, tylersabin72
1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of
Answers: 1
Physics, 22.06.2019 17:30, smariedegray
Convection currents are caused by differences in what two things?
Answers: 1
At the gym, a man pulls a bar on a machine that works the muscles of the upper back. It takes him 0....
Physics, 23.11.2020 01:30
Mathematics, 23.11.2020 01:30
Mathematics, 23.11.2020 01:30
English, 23.11.2020 01:30