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A spacecraft is on a journey to the moon. At what point, asmeasured from the center of the earth, does the gravitational forceexerted on the spacecraft by the earth balance that exerted by themoon? This point lies on a line between the centers of the earthand the moon. The distance between the earth and the moon is 3.85× 108 m, and the mass of the earth is 81.4 times as great asthat of the moon.
My home is exactly 5.9 km from Spartan Stadium, where the football team has just scored another touchdown. What is the temperature(in degree Celsius) of the air
Suppose a flat roof has a surface area of 1.29000×102 m2. What is the force with which the air inside the house pushes the roof upward
A meter stick is pivoted at its 50-cm mark but does not balance because of non uniformities in its material that cause its center of gravity to be displaced from its geometrical center. Find the mass of the meter stick and its location of its cente..
A thin, uniform, metal bar, 3m long and weighing80N , is hanging vertically from the ceiling by a frictionless pivot, Find the angular speed of the bar just after the collision
1. daggett turns his living room into a giant turntable but forgets to pin down the furniture. as a result the
A solenoid is designed to produce a 2.74*10^-2T magnetic field near its center. It has a radious of 1.25cm and a length of 45.0 cm, how many turns must the solenoid have
The two vectors and in the figure below have equal magnitudes of 11.0 m and their angles are ?1 = 30° and ?2 = 110°. (a) Find the x and y components of their vector sum . (b) Find the magnitude of . (c) Find the angle makes with the positive x axis.
In a typical game of squash, two people hit a soft rubber ball at a wall until they are about to drop due to dehydration and exhaustion.
At the same instant that a motionless 9.6 kg ball is dropped from 27 m above the Earth's surface, a second ball, what is the velocity of the center of mass of the two-ball system
Imagine that the only visible photons that an electron in a box of unknown length emits have wavelengths of 689nm and 413nm, Identify the transitions and find the length of the box
A toy top has a string wrapped around its body. The string has a length of 64cm and is wrapped around the top at a place where its radius is 2.0cm. What is the final angular velocity in rpm of the top when the string is completely unwound
A 1,576-kg car is moving down a road with a slope (grade) of 11% while speeding up at a rate of 3.6 m/s^2. What is the direction and magnitude of the frictional force
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