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In some places, insect "zappers" with their blue lights, are afamiliar sight on a summer's night. These devices use a highvoltage to electrocute insects. One such device uses an ac voltageof 4320V, which is obtained froma standard 120.0V outlet by meansof a transformer. If the primary coil has 21 turns, how many turnsare in the secondary coil?
as the cord unravels from the wheels inner hub the angular velocity of the outer hub 2 rads. determine the magnitudes
Two masses are connected as in the figure, where ?=40.0°, m1=13 kg and the coefficient of kinetic friction between the m2=7 kg object and the plane is ?k=0.25. Find the acceleration reached by the objects
a flow of water travels through a large pipe. in the water are pellets of plastic which float to the top and smaller
a baseball has mass 0.145 kg.a if the velocity of a pitched ball has a magnitude of 50.0 ms and the batted balls
a roach that runs for its life because you try to hit it with your physics book runs off the horizontal tabletop with a
What is the magnitude of the force (in N) the second child must exert to keep the door from moving? Assume friction is negligible.
A space station in the form of a large wheel, 311m in diamter, rotates to provide an "artificial gravity" of 5.2m/s^2 for people located on the outer rim. Find the rotational frequency of the wheel
Determine the potential 3.5 mm from the negative plate of a pair of parallel plates separated by 24.5 mm and connected to a 24-Vbattery.
A 0.145- kg baseball traveling 34.50 m/s is stopped in 0.183 s by a catcher's mitt. What is the average force on the catcher's mitt
when 200g of aluminum at 100deg c is dropped into aluminum calorimeter of mass 120 g and containing 150g kerosene at
tarzan m 85 kg is trying to swing across a river on a long vine. use angle 40 degrees and l10m. assume that he starts
In exercising, a weight lifter loses 0.123 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. find the change in the internal energy of the weight lifter
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