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While walking around your apartment in socks you shuffle your feet across the floor and realize that you've accumulated a positive charge of +9 nC (9 x 10^-9 C).
a. Have electrons been removed from you, or have portons been added?
b. How many electrons have been removed or portons added?
A playground merry-go-round of radiusR=2.00m has a moment of inertiaI=255kg·m2and is rotating at9.0rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
Since each rolling wheel of a railroad train is tapered, the narrow part of the wheel has a tangential speed that is
At t = 0, a rectangular coil of resistance R = 1.6 ? and dimensions w = 3 cm and L = 8 cm enters a region of constant magnetic field B = 1.7 T directed into the screen, find the force required at time t = 0.8 sec to maintain this velocity
Consider the light beam shown in the figure, where d = 173 cm and ? = 13.5°. How many times does the light beam reflect from the top mirror
At the bottom of an old mercury-in-glass thermometer is a 37-mm3 reservoir filled with mercury. determine how far (in mm) the mercury would expand into the capillary
The gravitational acceleration on the Moon is a sixth of that on Earth. The weight of an apple is 1.03 N on Earth. What is the weight of the apple on the Moon
Water flowing through a 2.9 cm-diameter pipe can fill a 300L bathtub in 3.6 min. What is the speed of the water in the pipe
A particular engine has a power output of 4.00 kW and an efficiency of 23.0%. Assume the engine expels 7000 J of energy in each cycle. Find the energy absorbed in each cycle
A (hypothetical) large slingshot is stretched 1.2 m to launch a 170 g projectile with speed sufficient to escape from Earth (11.2 km/s). What is the spring constant of the device
A boy and a girl are balanced on a massless seesaw. The boy has a mass of 75 kg and the girls mass is 50 kg. find where must the girl sit on the other side
A 25.0-mW laser beam of diameter 2.00 mm is reflected at normal incidence by a perfectly reflecting mirror
A 2.3-kg cart is rolling along a frictionless, horizontal track towards a 1.6-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certai..
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