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It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station is constructed as a 1600-m-diameter cylinder that rotates about its axis. The inside surface is the deck of the space station.
What rotation period will provide "normal" gravity?
A 200 g block is pressed against a spring of force constant 1.40 kN/m until the block compresses the spring 10 cm. The spring rests at the bottom of a ramp inclined at 60.0 degrees to the horizontal.
A small sphere with a charge of -5.9 10-7 C is placed in a uniform electric field of magnitude 1.9 106 N/C pointing to the west. What is the magnitude and direction of the force on the sphere due to the electric field?
A quarter circle of electric charge with a radius of 2.5 m has a uniform charge density of +0.7x10^-6 C/m. At the center of the circle is located a +0.3C charge
An outfielder throws a 0.150 kg baseball at a speed of 39.6m/s and an initial angle of 34° What is the kinetic energy of the baseball at the highest point of its trajectory.
A 64-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 834 N. What is the acceleration of elevator.
What phase difference between two otherwise identical harmonic waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 1.4 times that of the amplitude of either of the combining waves? Exp..
A rocket is launched at an angle of 52° above the horizontal with an initial speed of 103 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 32 m/s2. At this time, its engines fail and the rocket proceeds to move..
The two forces in each pair could have different physical origins (for instance, one of the forces could be due to gravity, and its pair force might be due to friction or electric charge).
Find the magnitude of the acceleration for an electron in a uniform electric field with a magnitude of 122 N/C.
If the ropes supporting the rings are attached to ceiling directly above, what is the tension in each rope.
An insulated Thermos contains 119 cm3 of hot coffee at 64 °C. You put a 12g ice cube at its melting point to cool the coffee. By how a lot of degrees have your coffee cooled once the ice has melted and equilibrium is reached.
If a car moving at 82 takes 300 to stop with uniform acceleration after its brakes is applied, how far will it take to stop under the same conditions if its initial velocity is 41.
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