Metal detector: start an ac current running through the first loop by using the power amplifier to generate a sinusoidal voltage across the terminals of the loop. use around 2.0v at 2.0hz. place a second loop (unconnected in any visible way) a few centimeters away, but coaxial with the first loop. measure the peak voltage on the second loop fthe one wlo power hookup). q6: what do you see? crazy, huh! now u place the metal rod between the loops. q7: what happens to the voltage on the second p, loop? q8: do you get the same effect with a non-metallic object?

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.