The physical (natural) laws which establish how things work can be investigated by the scientific method. True or False

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

What type of nuclear decay causes the atomic number of an element to increase by 1?

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 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?