A poker is used to lift a load of 1200N by placing it at a distance of 0.25m from the fulcrum. Calculate the force required to balance the load at 60 cm from the fulcrum.

Agalvanometer has an internal resistance of 100 ω and deflects full-scale at 2.00 ma. what size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 ma, and how should this resistor be connected to the galvanometer?

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?

If a balloon is taken outside on a very cold day, what will occur?