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An ice skater spins at .8 rev/s with arms extended. Pulls arms in and spins 5.3 rev/s. Change of moment of inertia is what factor of original.
An object's distance from a converging lens is 4.37 times the focal length. Evaluate what the magnification of the image
In a supermarket, you place a 22.3 N (around 5 lb) bag of oranges on a scale, and the scale starts to oscillate at 2.7 Hz. What is the force constant (spring constant) of the spring of the scale
A mass attached to a spring experiences a displacement x =3cos(t) + 4sin(t). What is the amplitude of the simple harmonic motion
A 755 Newton person stands in the middle of a frozen pond of radius 10.0 meter. Find how long does it take him to reach the south shore
Assume that the moon orbits the earth in a circular orbit. From the observed orbital period of 27.3 days, calculate the distance of the moon from the center of the earth
A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. What is the mass of the aluminum chunk
a an ideal gas occupies a volume of 3.0-cm3 at 20degc and atmospheric pressure. determine the number of molecules of
for the reaction given below the frequency factor a is 8.7 x 1012 s-1 and the activation energy is 63 kjmol.nog o3g
When 165 grams of an unknown metal at 225 degrees C is placed into 875 grams of water at 24.4 degrees C inside a perfect calorimeter, Find the specific heat capacity of the unknown metal
During an all-night cram session, a student heats up a 0.836 liter (0.836 x 10- 3 m3) glass (Pyrex) beaker of cold coffee. How much coffee (in cubic meters) has spilled out of the beaker
A person is making homemade ice cream. She exerts a force ofmagnitude 22 N on the free end of thecrank handle, what is the average power being expended
At what Kelvin temperature does the rms speed of the oxygen (O2) molecules in the air near the surface of the earth become equal to the escape speed from the earth.
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