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A small sphere of radius r1 and charge q1 is enclosed by a spherical shell of radius r2 and charge q2. Show that if q1 is positive, charge will necessarily flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge q2 on the shell is.
A baseball is popped straight up into the air and has a hang-time of 6.25 s. Determine the height to which the ball rises before it reaches its peak
A car is traveling at 66.2 mph. The driver applies the brakes and the car decelerates at 1.3 m/s2. What is the stopping distance
An ideal air-filled parallel-plate capacitor has round plates and carries a fixed amount of equal but opposite charge on its plates. how much energy does it now store
In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots, Find the direction of the balloon's inital velocity
An ideal solenoid has a field of magnitude 0.10 T when carrying a current of 200 A. The solenoid is 5.0 m long. What is the number of turns for the coils of the solenoid
Suppose that you find the volume of all the oceans to be 1.4\times10^9\; \rm km^3 in a reference book. What is this volume in cubic meters
A ball is thrown horizontally from a cliff of height H at the very same moment a truck is passing by the base of the cliff at a constant speed Vtruck. What is the ball's velocity (magnitude and direction) when it hits the truck
a rock is dropped into a deep hole and 2.5 s later the sound of striking the bottom is heard. if the speed of sound is
A place kicker must kick a football from a point 28.0 m (= 30.6 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. What is the vertical velocity of the ball at the time it reaches the crossbar
Two of Angie's friends are talking to each other at a distance of 3.0 m from where Angie stands. What sound intensity does he measure for the two talkers
A body oscillates with simple harmonic motion according to x = (9.0 m) cos[(3.0pi rad/s)t + pi/3 rad]. What is the period of the motion
Find the typical speed for a tsunami. (Note down that in the open ocean, tsunamis generally have amplitude of less than a meter, allowing them to pass ships unnoticed. As they approach shore, however, water depth decreases and the waves slow down. Th..
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