30 POINTS! A coconut falls 18 m from the top of a palm tree. How fast will the coconut be traveling when it reaches the ground? (Hint: KEinitial = 0, PEfinal = 0.)
A. 19 m/s
B. 13 m/s
C. 9.4 m/s
D. 27 m/s

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_

The movement of electrons between atoms is called an