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1. Skylab 1, the first American space station, had a mass of about 68 t. It was launched into orbit 435km above Earth's surface. Calculate the gravitational field strength at the location of Skylab 1 at this altitude. 2. The blade of a 22 table saw has a diameter of 25.4cm and rotates with frequency of 750rpm, what's the magnitude of the centripetal acceleration of the edge of the blade? 3. A star in the Andromeda galaxy is found to have a planet orbiting it at an average radius of 2.38 x 10^10 meters and an orbital period of 4.46 x 10^4 seconds. What is the star's mass? If the planet had an orbital period of 6.19 x 10^6 seconds, what would the orbital radius be?
An athlete has a large lung capacity, 7.0 L. Assuming air to be an ideal gas, how many molecules of air are in the athlete's lungs
The drawing shows two wires that both carry the same current ofI = 66.1 A and are oriented perpendicular to the plane ofthe paper. The current in one wire is directed out of the paper, while the current in the other wire is directed into the paper..
An unstable particle having mass of 5.00x10^-27 kg is initially at rest. Find the rest masses of the fragments
Light traveling in air enters a material at an angle of 50 degrees with respect to the normal. Calculate the index of refraction of the material
A 40-kg firl and an 8.4-kg sled are on the surface of a frozen lake, 15 m apart. By means of a rope the girl exerts a 5.2-N force on the sled, How far from the girl's intial position do they meet
In an electron diffraction experiment, consider a screen with asingle vertical slit of finite width d in the x-direction,"illuminated" from behind by a plane monochromatic electron wave ofwavelength λ with the wave fronts parallel to the plane of ..
a certain vibrating string on a piano has a length of 74cm and forms a standing wave having two antinodes. a which
question1an object floats with half its volume beneath the surface of the water. the weight of the displaced water is
a - 310-6f capacitor and a - 510-6f capacitor are connected in series across a 500-v supply line. the charged
An object, mass 1.48 kg, moves in a horizontal circle with a radius of 1.52m. The object has an intial velocity of 28.0 m s-1. If the kinetic coefficient of friction between object and surface is 0.382.
Derive expressions for the Lorentz transformation equation of acceleration in the x and y directions. Do this using the Lorentz velocity transformation
A 300g ball on a 70-cm-long string is swung in a vertical circle about a point 200 cm above the floor. What was the tension in the string an instant before it broke
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