Which of these examples has the most potential energy? a. a car's shock absorber b. a lightning bolt hitting a tree c. a volcano just before it erupts d. a race car moving at 200 km/h

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.