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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?
You need a transformer that will draw 16 W of power from a 220 V (rms) power line, stepping the voltage down to 12 V (rms) What will be the current in the secondary coil? Express your answer to two significant figures and include the appropriate un..
An engine with an output of 267.0 W has an efficiency of 39.0 %. It works at 9.00 cycles/s. How much work is done in each cycle? How much heat is rejected each cycle
1. a car with an initial velocity of 4.0ms accelerates at a rate of 2.0 ms2 for 10.0s. how far does the car travel
In a head-on collision, a car stops in 0.15 second from a speed of 22 m/s. Find what force is applied to the driver by his seat belt during that fraction of a second
A Michelson's interferometer is illuminated by krypton orange light, which has a wavelength of 605.8 nm. Calculate the angular radii of the first three bright fringes
A solid sphere of moment of inertia (2/5) MR^2 rolls without slipping down an incline plane of 30 degrees from a height of 8 meters. What is the velocity at the bottom
a 2.0microf capacitor and a 4.0microf capacitor are connected in series across 1000 v. the charged capacitors are then
a fan at a rock concert is 35.0m from the stage and at this point the sound intensity level is 108db . sound is
nitrogen gas in an expandable container is cooled from 50.0degc to 10.0degc with the pressure held constant at 3.00 x
A wood block weighing 130N rests on an inclined plane .The coefficient of kinetic friction among the block and the plate is 0.620. Discover the angle of the inclined plane, Θ, at which the block will slide down the plane at a constant speed once it h..
A college professor keeps 0.25 L (0.00025 m^3) of hot coffee in a thick styrofoam container. at what rate is heat flowing out through the walls of the container
If an inductor carrying a 1.40 A current stores an energy of 0.250 mJ, How much energy does the same inductor store if it carries a 2.9 A current
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