Which statement about the greenhouse effect is not true? a) the greenhouse effect keeps earth from becoming too hot during the day. b) the greenhouse effect causes the change in seasons. c) the greenhouse effect keeps earth from becoming too cold during the night. d) the greenhouse effect makes it possible for organisms to live on earth. e) the greenhouse effect can be influenced by human activity.

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

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.