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A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, 11 years have elapsed on earth, and 9.8 years have elapsed on board the ship. How far away (in meters) is the planet, according to observers on earth?
a disk is rotating about its central axis like a merry-go-round. the angular position deltat of a reference line one
A motorcyclist intends to perform a stunt in which he jumps a river 25 meters wide. The motorcyclist must jump from a cliff on one side to a cliff 20 meters lower on the other side. How far will he travel in a horizontal direction
Two point charges Q1 = 80 C and Q2 = 260 C are initially very far apart. They are then brought together, with a final separation of 1.2 m. How much work does it take to bring them together?
A small spherical insulator of mass 3.34 × 10-2 kg and charge +0.600 C is hung by a thin wire of negligible mass. A charge of -0.900 C is held 0.150 m away from the sphere and directly to the right of it, so the wire makes an angle by the vertical (s..
a 10.0 ohm resistor a 12x10-6 f capacitor and a 17x10-3 h inductor are connected in series to a 155-v generator.
a golfer takes three putts to get the ball into the hole. the first putt displaces the ball 3.41 m north the second
An elevator passenger is on her way down to the ground floor. Her mass is 50 kg, What are the rate and direction of her acceleration
A motorcycle daredevil is attempting to jump across as many busesas possible (see the drawing). The takeoff ramp makes an angleθ = 16.6° above thehorizontal, and the landing ramp is identical to the takeoff ramp.The buses are parked side by side, ..
The ground state for a single valence electron of a rubidium atom (Z=37) is 5s and its energy is –4.18 eV. The valence electron is excited into the 5g state. We want to determine the energy of this 5g electron. Assume that the wave function for th..
With the battery disconnected the compass needle points to the right, in the plane of the coil. The apparatus is located near equator, where the Earth's magnetic field B Earth is horizontal, with a magnitude of 4×10-5 tesla. (Presume that B Earth ..
A film of oil, with an index of refraction of 1.48 and a thickness of 1.80 cm, floats on a pool of water. A beam of light is incident on the oil at an angle, theta = 52.2° to the vertical. Find the angle the light beam makes with the vertical as it..
A hiker weighing 600N carries a 2.0 kg knapsack up atrail. After 30 minutes, the hiker is 300m higher than thestarting point. how much total work did the hiker do
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