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Josh starts his sled at the top of a 3.0 m high hill that has a constant slope of 25°. After reaching the bottom, he slides across a horizontal patch of snow. The hill is frictionless, but the coefficient of kinetic friction between his sled and the (horizontal) snow is 0.05. How far from the base of the hill does he end up?
a 250-kg motorcycle goes around an unbanked turn of radius 13.7m at a steady 96.5 km/h. What is the magnitude of the net force on the motorcycle?
Three resistors are connected in series across a battery, What is the greatest voltage that the battery can have without one of the resistors burning up
Assume that the universe is a spherical cavity with a radius of 10^26 m and temperature of 2.7 K. How many thermally excited photons are there in the universe
To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. What was the raven's speed right after the collision
the motion of a 25.0kg mass on the end of a string is uniform motion. the magnitude of the tangential velocity of the mass is 5.0m/s. calculate the angular momentum of the mass
A daredevil is shot out of a cannon at 45.0° to the horizontal with an initial speed of 26.0 m/s. At what height above the cannon should the net be placed in order to catch the daredevil
Ligh of wavelength 248nm is directed onto the surface of a metal, what is the longest wavelength of light which will eject electrons from this metal
A 10.0 cm radius piston compresses a gas isothermally from a height of 15.0 cm to 2.50 cm at a constant pressure of 2.0 atm. How much heat was added to the gas
An automobile with 0.200 m radius tires travels 70,000 km before wearing them out. How many revolutions do the tires make
Charges of 3.0 nC, -2.0 nC, -7.0 nC, and 1.0 nC are contained inside a rectangular box with length 1.0 m, width 2.0 m, find the electric flux through the surface of the box
You bike at 10.3 m/s directly away from your neighbor\'s trumpet sound and toward the sound of another neighbor\'s trombone, What frequency is the trombonist producing
A concave shaving mirror has a radius of curvature of 37.8 cm. In the mirror, the image of a pimple on your face is magnified +6 times what it actually is on your cheek
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