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A student is skateboarding down a ramp that is 6.0m long andinclined at 18 degrees with respect to the horizontal. Theintial speed of the skateboarder at the top of the ramp is2.6m/s. Neglect friction and find the speed at the bottom of the ramp.
At rest, a car's horn sounds the note A (440 Hz). The horn is sounded while the car is moving down the street, What is the speed of the car
A surfer is zipping northeast across the river with a velocity of 10 m/s relative to the water. what is the true velocity of the surfer
In a ballistic pendulum demonstration gone bad, a 0.54g pellet, fired horizontally with kinetic energy 3.40J, how much kinetic energy did the pellet have after emerging from the Styrofoam
Consider a car driving at constant velocity. The force of friction acting on the car in Newtons is, Find the magnitude of f when v = 50 miles/h
A spacecraft is in a circular Earth orbit at an altitude of 5300km . By how much will its altitude decrease if it moves to a new circular orbit
What fraction of the power radiated by the sun is intercepted by the planet Neptune? The radius of Mercury is 2.48 107 m
A small drop of water measuring 0.6 mm in diameter, how many extra electrons are on the drop of water
An AC generator is to have a maximum output of 340 V. Find the maximum current induced in the coil
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 470 nm. What is the stopping voltage required if light of wavelength 410nm is used
When you take your 1400-{\rm kg} car out for a spin, you go around a corner of radius 52 m with a speed of 11 m/s. what is the force exerted on it by static friction
When a grating is used with light that has a wavelength of 541 nm, a third-order maximum is formed at an angle of 30.0°. How many lines per centimeter does this grating have
An inductor of L=0.7H and a charged capacitor C=5F with Q =20C are connected to each other. How much energy is stored in the capacitor initially? When the current in the circuit is ½ its maximum value, how much energy remains in the capacitor?
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