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A merry-go-round starts from rest and accelerates with angular acceleration 0.010 rad/sec^2 for 14 sec. How many revolutions does it make during this time? What is its average angular speed? What is the rotational inertia of the merry-go-round if a constant tangential force of magnitude 200 N, applied 1 m from the axis of rotation, was required to accelerate it? What was the angular speed at the end of the spin-up time?
A certain laser emits red light in a narrow band of wavelengths centered at 533.0 nm, What is the corresponding "frequency width" for the emission
Two 5.3cm x 5.3cm metal plates are separated by a 0.20--thick piece of Teflon. What is the maximum potential difference between the disks
How long does it take mass to make one complete revolution.
A 78-kg fisherman in a 137-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.0 m/s, find the velocity of the boat after the package is thrown
A ball rolling on a table has a velocity with rectangular components vx = 0.50m/s and vy = 0.60m/s. What is the direction of the balls displacement
An ideal gas is confined to a cylinder by a piston. The piston is slowly pushed so that the gas temperature remains at 20 degrees C. find the entropy change of the gas
If an electron travels 0.250 m from an electron gun to a TV screen in 32.0 ns, what voltage was used to accelerate it
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.20 m/s2 for 4.05 s, making straight skid marks 61.0 m long, all the way to the tree. With what speed does the car then s..
A net force of 7 newtons acts on an object that weighs 49 newtons. What is the resulting acceleration
a wire has a diameter fo .200mm and stretches .20% when a force of 6.28N is applied to it. what is the elastic (Young's) modulu of this wire
An iron casting containing a number of cavities weighs 16967.7 N in air and 13045.8 N in water. What is the total volume of all the cavities in the casting
A 42kg child decides to make a raft out of empty 1.0 L soda bottles and duct tape. what is the minimum number of bottles needed in order to keep the child dry
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