an automobile driver moving at 30ms^-1, suddenly saw a policeman standing 70m straight ahead. if the reaction time is 0.5secs and the max. deceleration is 8ms^-2, can he avoid hitting the policeman without steering to one side?​

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

J. j. thomson’s experiment disproved the theory that an atom

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.