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A large positively-charged object with charge q = 3.75 ?C is brought near a negatively-charged plastic ball suspended from a string of negligible mass. The suspended ball has a charge of q- = -53.3 nC and a mass of 15.5 grams. What is the angle the string makes with the vertical when the positively charged object is 19.5 cm from the suspended ball? The positively-charged object is at the same height as the suspended ball.
A stone is thrown vertically upward with a speed of 12.3 m/s from the edge of a cliff 84.6m high. What is the speed just before hitting.
Assume that 10 g of steam is added to 100 g of water initially at 19°C. The water is inside an aluminum cup of mass 35 g. Find the final temperature of the water after equilibrium is reached
Integrated circuits are manufactured in vacuum chambers in which the air pressure is 9.00×10?11mm of Hg. What is the mean free path of a molecule
A 0.38-kg cord is stretched between two supports,7.6m apart. When one support is struck by a hammer, What is the tension on the cord
A ball is launched from a cannon at the ground level with speed v0=40 m/s at an angle 36.9 degrees above the horizontal. Find the horizontal range
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling the vertical distance 1.25 m from the end of the track.
A 4.40 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 40.0 N. it gives the block's speed v versus time t as the block moves along an x axis on the floor. The scale of its vertical axis is set by..
The pilot of an aircraft wishes to fly due west in a 49.8 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 192 km/h.
A typical wall outlet is 120 volts in the U. S. Personal MP3 players require much smaller voltages, calculate the number of turns on the secondary coil of the adapter transformer
A 50 kg crate slides down a ramp that is inclined by 30 degrees from the horizontal. Calculate the amount of energy lost by the crate due to friction in its journey down the ramp
a disk is spinnning at a rate of 10 rad/s. a second disk of the same mass and shape, what is the final angular velocity of the two disks
If the balloon can barely lift an additional 2900N of passengers, breakfast, and champagne when the outside air density is 1.23kg/m3, FIND the average density of the heated gases in the envelope
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