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Suppose a spherical planet of radius R and an average density 5.0 x 103 kg/m3; this is approximately the average density of earth. An 80 kilogram astronaut is on the surface of the planet. The magnitude of the gravitational force of the planet on the astronaut is only 1.0 Newton. Evaluate what is the radius of the planet?
When a certain spring is stretched, the restoring force satisfies the equation F=-kx+βx^3. If k=10.4 N/m and β=101 N/m^3, evaluate the work done by this force when the spring is stretched 0.111 meter
An object is placed in front of a converging lens in such a position that the lens (f = 14.0 cm) creates a real image located 28.0 cm from the lens. What is the image distance of this new image
The parallel metal plate of a capacitor is detached by a distance of 0.5cm and is connected to a 90v battery. Find the electric field between them and surface charge density on the plate.
A container of cross-sectional area 102 cm2 contains liquid of density 1.95 g/cm3 to a height of 6.60 cm above a small hole of area 1.00 cm2 in the side. Find the flow rate through the hole
a moving rod is observed to have a lenght of 2m and to be oriented at an angle of 30 degrees with respect to the direction of motion. what is the orentation angle in the proper frame
for womens volleyball the top of the net is 2.24 m above the floor and the court measures 9.0 m by 9.0 m on each side
a water pipe having a 2.4 cm inside diameter carries water into the basement of a house at a speed of 0.93 ms and a
small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
A hopper drops gravel at a rate of 75kg/s onto a belt that moves by constant velocity v=2.2m/s. What is the additional force (over and above internal friction) required to keep the conveyor belt moving as gravel falls onto it?
The first player has an acceleration whose magnitude is 0.5 m/s^2 and the second player's has an acceleration of 0.3 m/s^2. Explain by how much time passes before hey collide?
a solid ball and a hollow ball each with a mass of 2.29 kg and radius 0.115 m start from rest and roll down a ramp of
a stationary billiard ball mass 0.17 kg is struck by an identical ball moving at 3.0 ms. after the collision the second
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