What effort will a machine of efficiency 90% apply to a load of 180N if its efforts arm is twice as long as its load arm?

Calculate the effective capacitance of the circuit in the diagram given

The inner diameter of a small test tube can be measured accurately using a

A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?

When an atom loses or gain a charge it becomes