Given vector A with rightwards harpoon with barb upwards on top has a magnitude of 5 meters directed 35 degrees above the positive x-axis, and vector B with rightwards harpoon with barb upwards on top has a magnitude of 8 meters directed 70 degrees above the positive x-axis, calculate A with rightwards harpoon with barb upwards on top times B with rightwards harpoon with barb upwards on top . A. 32.8 B. 13 C. 22.9 D. 40

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

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.