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(a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of22.9m. Assume the density of the water is 1.00 x 103 kg/m3 and the air above is at a pressure of 101.3 kPa.
(b) What force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of 36.0cm?
A particular Bohr orbit in a hydrogen atom has a total energy of -0.85eV. What is the kinetic energy of the electron in this orbit
When an amount Q of heat was added to a particular ideal gas, the volume of the gas changed from V1 to V2 while the pressure remained constant at p. By how much did the internal energy ?Eint of the gas change? If the quantity of gas present is n mole..
A starcruiser, measured by its passengers to be 80.0m long, whizzes by an Earthling at speed 0.992c. What length does the Earthling measure the ship's length to be
A particle starts from the origin with velocity 9 m/s at t = 0 and moves in the xy plane with a varying acceleration given by = (9?t) m/s2
You have a 1.5 m long copper wire. You want to make an N-turn current loop that generates a 2.4 mT magnetic field at the center, What will be the diameter of your coil
a bicycle is turned upside down in the shop being repaired. a friend spins the wheel, radius R, and notices that water drops fly off the wheel tangentially to the wheel, calculate the average velocity V during one revolution
Two 0.20-g metal spheres are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostaticrepulsion forces them apart until the angle between the threads is 20 degrees. How much charge..
Estimate the thickness of lead shielding needed to reduce the exposure rate 2.5 m from a 5.92x10^11 Bq point source of Cs-137 to 1.0 mR/hr.
A baking dish is removed from a hot oven and placed on a cooling rack. As the dish cools down to 34° C from 189° C, What was the net radiant power of the baking dish
A uniform-density 8 kg disk of radius 0.20 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with the constant force of 45 N through a distance of 0.7 ..
An empty rubber balloon has a mass of 0.0105 kg. The balloon is filled with helium at adensity of 0.181 kg/m3. what is the tension in the line
A cylinder contains a mixture of helium ans argon gas inequlibrium at a temperature of 150 degrees. What is the average kinetic energy of each type of molecule? What is the rms speed of each type of molecule?
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