A volunteer is holding the other end, so that a standing wave is set up on the spring. The spring is vibrating with 3 antinodes. What is the frequency in hertz? What is the period? How many nodes are on the spring? What overtone is the spring vibrating in?

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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) =_

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents