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A dime is placed in front of a concave mirror that has a radius of curvature R = 0.15 m. The image of the dime is inverted and three times the size of the dime. Determine the distance between the dime and the mirror.
A circular loop of wire is oriented so that its normal is perpendicular to the earth's horizontal magnetic field (B = 2.87 x 10^-5 T). Calculate the radius of the loop
In the figure the man hanging upside down is holding a partner who weighs 505 N. what force must the man apply to his partner in the straight-down position
The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. Explain how far up the ladder can an 720 N person climb before the ladder begins to slip?
A helicopter lifts a 72 kg astronaut 19 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/12. How much work is done on the astronaut
A 755N diver drops from a board 10m above the water's surface. Find out the diver's speed 5m above the water's surface. Then find the diver's speed just before striking the water.
one of your classmate has a friend with a boat. here is your classmate on water-skis being towed. what is the friction force of the water
Two loudspeakers, 5.0 m apart and facing each other, play identical sounds of the same frequency, What is the frequency of the sound (in Hz)
A commuter train blows its horn as it passes a passenger platform at a constant speed of 60.0 m/s. What is the frequency observed by a person on the platform as the train approaches
A square loop 15 cm on a side lies in the xy plane. Its resistance is .55 ohm. A magnetic field points in the +z direction, What is the direction of the induced current in the loop
Hakeem throws a 10.50 g ball straight down from a height of 2m. The ball strikes the floor at a speed of 7m/s. What was the initial speed of the ball? Presume that air resistance is negligible.
A novice skier, starting from rest, slides down a frictionless 33.0° incline whose vertical height is 124 m. Explain how fast is she going when she reaches the bottom?
A sealed container has a volume of 0.0030m^3 and contains 30 g of molecular nitrogen which as a mass of 28u. What is the pressure of nitrogen gas
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