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A ball attached to a string starts at rest and undergoes a constantangular acceleration as it travels in a horizontal circle of radius0.30m. After 0.65 sec, the angular speed of the ball is 9.7rad/s. What is the tangential acceleration of the ball?
Water is forced out of a fire extinguisher by air pressure, as shown in Figure P9.64 where h = 0.495 m. How much gauge air pressure in the tank
A ball of mass 1.024 g and positive charge q =40.3microC is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of theta=15.0o from the vertical. What is the magnitude of the electric field..
You observe that a solid cube of some material floats on the surface of an oil puddle at a service station with 75.9% of its volume submerged. What is the density of the cube\'s material
q1. a sled and rider with a combined weight of 68 kg are at rest on the top of a hill 28 m high. what is their total
An extreme skier, starting from rest, coasts down a mountain that makes an angle 25.0° with the horizontal. How fast is she going just before she lands
A parallel plate capacitor holds 10 uC charge on each plate when connected to a 12V battery. how much would the capacitor hold
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 3 m and let go. what is the maximum velocity of the mass
A piece of cheese with a mass of 1.30kg is placed on a vertical spring of negligible mass and a force constant k= 1600 N/m that is compressed by a distance of 16.2cm. how high does the cheese rise from this initial position
A football quaterback runs 15.0 m staright down the playing field in 2.50s. what are the average velocities for the three intervals
guess the force between a proton and an electron at the Bohr radius of 0.5Å (1 Å=10-10 m). The magnitude of the charge of an electron, as well as a proton, is 1.6·10-19 C.
A puck slides on a surface for 5.6 m before it stops. If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is the force of friction exerted on the puck
Two pots are identical except that the flat bottom of one is aluminum, whereas that of the other is copper. find the temperature of the heating element on which the copper bottom rests
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