Which is a characteristic property of acids? a. they turn blue litmus paper red. b. they turn red litmus paper blue. c. they taste bitter. d. they do not react with metals.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.