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A space craft is designed to be rotating column, in order to simulate artifical gravity. For a column of radius 500m, what angular frequency must be maintained to simulate surface gravity?(9.81m/s^2)
n = 3.78 mol of Hydrogen gas is initially at T = 366 K temperature and pi = 2.88×105 Pa pressure. How much work did the external force perform
What is the tension in each cable if angle between each and the direction the crate moves is 12°.
Two satellites are in circular orbits around a planet that has radius 9.00*10^6 m. One satellite has a mass 68.0 kg, What is the orbital speed of the second satellite
Two snowballs are moving directly toward each other along a vertical axis. Just before the snowballs collide, Draw a before and after picture of the collision
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +19.7 km/s to -19.1 km/s.
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. estimate the diameter of the pinhole
An astroid of mass 2.1 x 10^15 kg splits apart. Asume the original astroid was at rest, what is the final velocity of the larger piece after the break, what was the intioal momentum of the system
Two trains and a bird Two trains, each having a speed of 23km/h, are headed at each other on the equal straight track. A bird that can fly 60km/h flies off the front of one train when they are 70 km apart and heads directly for the other train.
What is the intensity level in decibels for a sound with an intensity of 2.35×10-4 W/m2, What is the intensity for a sound with an intensity level of 79.9 dB
In Larry Niven's science-fiction novel Ringworld, a rigid ring of material rotates about a star. The inhabitants of this ring world live on the starlit inner surface of the ring, What is the length of a year on this planet
Rhea, one of Saturn's moons, has a radius of 765 km and an acceleration due to gravity of 0.278 m/s2 at its surface. Calculate its mass and average density.
Light shone from a mystery material into water undergoes total internal reflection at an angle of 33.4 degrees. What is the index of refraction of the mystery material?
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