The speed of an electromagnetic wave is a constant, 3.0 × 108 m/s. the wavelength of a wave is 0.3 meters. what is the frequency? 1.0 × 108 hz 9.0 × 108 hz 9.0 × 107 hz 1.0 × 109 hz

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?

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.