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Apollo 11 astronauts left an array of "corner mirrors" on the Moon, each one consisting of three mirrors arranged at mutual right angles like the corner of a box. A corner mirror has the property that light shined on it from any angle is reflected back exactly in the direction from which it came. Scientists subsequently directed a brief pulse of light from a powerful laser at the mirror assembly on the Moon, and measured the time required for it to travel to the array and return back to Earth: 2.56 s. How far away was the array of mirrors at that time?
The woman in the figure is 54 kg, and the board she is standing on has a 10 kg mass. What are the readings on the scales located under the ends of the board?
A body moves from rest at point A for time T with a positive constant acceleration, after which it moves with the negative of this acceleration. How long will it take for the body to return to point
In an eclipsing spectroscopic binary system, the maximum radial velocities for the two components are 20 and 5 km/s. The orbit is circular, and the orbital period is 5 years. It takes .3 days from the start of the eclipse to the main minimum, whic..
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a merry-go-round rotates from rest with an angular acceleration of 1.50 radsec2. how long does it take to rotate
The most massive flying dinosaur was the pterosaur. The average mass for a pterosaur has been estimated from skeletons to be between 80.0 kg and 120.0 kg. What is the length of the branch
Satellite orbits the earth at a distance equal to twice the earth's radius above the surface of the earth (the total distance from the center of the earth is three times the radius of the earth).
You have landed on an unknown planet, Newtonia, and want to know what objects will weigh there. What would it weigh on Earth
A golf club has a lightweight flexible shaft with a heavy block of wood or metal (called the head of the club) at the end. A golfer making a long shot off the tee uses a driver, What is the speed of the club head immediately after the collision
A driver in a car travelling at a speed of 58.0 mi/h sees a deer 126 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assume that the deer does not move in the meantime).
A 43.0-N child is in a swing that is attached to ropes 1.60 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
the radius of a coil of wire with n turns is r 0.22 m. a clockwise current icoil2.0 a flows in the coil. a long
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