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A roller-coaster car has a mass of 500kg when fully loaded by passengers. The car passes over a hill of radius 15 m. At the top of the hill, the car has a speed of 8.0 m/s. what is the force of the track on the car at the hill? If the car has the similar mass which is 500kg, but at the bottom of a circular dip of radius 40 m and the car has a speed of 16 m/s. what is the magnitude of the force of the track on the car at the bottom of the dip?
A pencil, 15.7 cm long, is released from a vertical position with the eraser end resting on a table. What is the angular speed of the pencil
A thin film of oil (n = 1.22) is located on smooth, wet pavement. When viewed from a direction perpendicular to the pavement, the film reflects most powerfully red light at 640 nm and reflects no light at 512 nm. What is the minimum thickness of the ..
A horizontal force of 150 N is used to push a 45.0 kg packing crate a distance of 5.10 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150 N force _________J (b) the coeffici..
Starting from rest, a basketball rolls from the top of a hillto the bottom, reacing a translational speed of 3.54 m/s. Released from the rest at the same height, a can of frozenjuice rolls to the bottom of the same hill. What is the translational sp..
Assume that theprotons in a hot ball of protons each have a kinetic energy equalto kT, what is the least separation any two protons can have
psi x is the wave function for a particle moving along the x axis. write the mathematical that will allow us to
Assume that the brakes in your car create a constant deceleration, regardless of how fast you are going. If you double your driving speed, how does this affect the time required to come to a stop
What is the maximum positive potential energy. Write down an expression for U as a function of x, with U in joules and x in meters.
A soccer player kicks a rock horizontally off a 34.0-m-high cliff into a pool of water. what was the initial speed given to the rock
Air isn't a perfect electric insulator, but it has a very high resistivity of 3x10^13 omega*m. what fraction of the charge will flow across the air gap
A constant force of 46.3 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.09 m
At the instant the alpha particle leaves the nucleus, the centers of the two are 7.5 apart and essentially at rest. Find their speeds while they're a great distance apart. Treat each particle as a spherical charge distribution.
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