The pulley system has a mechanical advantage of 5. Determine how much input force is required to achieve 1000 N of lifting force.

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?

Acircuit is built based on this circuit diagram what is the equivalent resistance of the circuit? a.0.61 b.1.6 c.7.5 d.18