What is the net change that occurs during the fusion process in the Sun? Two helium nuclei come together to form a larger helium nucleus, two protons, and energy. Four hydrogen nuclei join to form a helium nucleus, two neutrinos, and energy. Six hydrogen nuclei and two electrons join to form a helium nucleus, two protons, two neutrinos, and energy. Two hydrogen nuclei come together to produce a helium nucleus and energy.

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Avalue that describes how heavy an object is and is related to the force of gravity is