Awater pump pumps 3 kg of water every second from the bottom of a well to the top of the well 50 m above. if the pump uses 2000 w of electrical power to accomplish the task, what is the efficiency of the pump

Like a key in a lock, the shape of the. must bind with the. of the recieving neuron

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

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon