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A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 275 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. Facing the axle, a 27.0-kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round?
A flywheel rotates with an angular speed of 27rev/s . As it is brought to rest with a constant acceleration, it turns 53rev . What is the magnitude of the angular acceleration
Write a program that replies either Leap Year or Not a Leap Year, given a year. It is a leap year if the year is divisible by 4 but not by 100 (for example, 1796 is a leap year because it is divisible by 4 but not by 100).
A certain nuclear power plant has an electrical power output of 430 MW. The rate at which energy must be supplied to the plant is 1,510 MW. What is the thermal efficiency of the power plant
Two nanowires are separated by 1.6 nm as measured by STM. Inside the wires the potential energy is zero, but between the wires the potential energy is greater than the electron's energy by only 1.4 eV.
How new/cutting edge is idea or company?why is it important in general?why is it important to marketers?growth potential?
500 grams of water initially at 3.00 c and a 10.0 gram ice cube at 0.00c are placed together in an insulated styrofoam cup of negligible heat capacity. find the final temperature of the contents of the cup
At the end of her routine, an ice skater spins through 8.00 revolutions with her arms always fully outstretched at right angles to her body.
The overhead costs to re-vamp a new system, production slow-down, costs of training will all have a negative effect in revenue earned if this change is done after the fact.
if a hydroelectric facility is to produce 100 000 hp with an elevation difference of 300 ft, what is a suitable speed (in rpm) if a kaplan turbine, operating at high efficiency, is used
If a car takes a banked curve at less than a given speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads).
A very large cylindrical tank vented to air contains a layer of oil on top of water. At the bottom of the container there is a horizontal pipe of very small radius, What is the unknown thickness of oil in the tank
A 1.70-kg block slides with a speed of 0.985 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 695 N/m. Calculate the kinetic energy of the block
An electron (charge -e) is projected horizontally into the space between two oppositely charged parallel plates. The electric field between the plates is 462N/C upward.
A 360 kg piano slides 3.1 m down a 25 degree incline and is kept from accelerating by A man who is pushing back on it parallel to the incline, Determine the work done on the piano by the man
A person walks first at a constant speed of 4.80 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 3.30 m/s. What is her average speed over the entire trip?
A crate of weight W is being pushed across a horizontal surface by a force directed at an angle of 20 degrees below the horizontal. find the magnitude of the normal force on the crate
A high-speed photograph of a club hitting a golf ball. The club was in contact with a ball, initially at rest, for about 0.0028s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.8 102 ft/s, find out the average forc..
A 10.0 g object moving to the right at 18.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 27.0 cm/s
The crankshaft in a race car goes from rest to 3360rpm in 2.0s . What is the crankshaft's angular acceleration
A charge of -3.0 nC is at the origin and a second charge of 13.0 nC is at x = 8.00 m. Find the magnitude and direction of the electric field halfway in between the two charges.
A 3.60 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest. What is the mass of the second sphere
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