A single movable pulley is used to lift load of 4000N to the height of 50cm .If the efficiency of the pulley system is 75%, calculate the effort distance, effort applied, input work, output work and loss of energy in the simple machine.

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same