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A spaceship in outer space has a doughnut shape with 480-m outer radius. The inhabitants stand with their heads toward the center and their feet on an outside rim. Over what time interval would the spaceship have to complete one rotation on its axis to make a bathroom scale have the same reading for the person in space as when on Earth's surface?
A 42.0 kg seal at an amusement park slides from rest down a ramp into the pool below. If the seal reaches the water with a speed of 4.30 m/s, what is the work done by kinetic friction
An investigator finds a fiber at a crime scene that he wishes to use as evidence against a suspect. What is the diameter of the fiber
a parallel-plate capacitor is made from two aluminum-foil sheets each 5.7 cm wide and 5.6 m long. between the sheets is
The radius of the hydrogen atom is 0.053 nm. find the Coulomb force between the electron and the proton in the atom
questiona white billiard ball with mass mw 1.32 kg is moving directly to the right with a speed of v 2.92 ms and
A guitar string has a linear density of 8.30 x 10^-4 kg/m. The length of the string is .660 m. The tension in the string is 52.0 N. When the fundamental frequency of the string is sounded by a tuning fork of frequency 196.0 Hz, what beat frequency is..
A car of mass m = 1000 kg is pushed off a cliff of height h = 24 m. What was the kinetic energy of the car the instant after it left the cliff
A thin, light wire is wrapped around the rim of a wheel, If the suspended object moves downward a distance of 3.40m in 1.86s, what is the mass of the wheel
Suppose that 1.4 moles of an ideal diatomic gas has a temperature of 1273 K, and that each molecule has a mass 2.32 × 10-26 kg, How many degrees of freedom does each molecule of the gas have
Light from a He-Ne laser (= 632.8) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.10 from the slits. The figure shows the interference pattern observed on the screen.
Using a block of a transparent, unknown material, it is found that a beam of light inside the material becomes totally internally reflected at the air-block interface at an angle of 48°. What is its index of refraction?
Four ropes, all at right angles to each other, pull on a ring. the force N, W; and D= 20N, S. Find the resultant direction of force on the ring
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