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What is the entropy decrease in 1.04 mol of helium gas which is cooled at 1 atm from room temperature 282 K to a final temperature of 3.79 K? The specific heat of helium is 21 J/mol · K.
A dentist uses a mirror to examine a tooth. The tooth is 1.04 cm in front of the mirror, and the image is formed 11.1 cm behind the mirror. Determine the mirror's radius of curvature
Two ice skaters not paying attention collide in a completely inelastic collision. Prior to the collision, first skater, with a mass of 60 kilogram, has a velocity of 5.0 km/h eastward, Obtain the velocity of the skaters after collision
A bike wheel (I=m*(r^2)) is spinning at 20 rad/s, at which point a 100 g rat jumps onto the wheel, what is the mass of the bike wheel
A helicopter is ascending vertically with a speed of 5.4 m/s. At height of 105m above the earth a package is dropped from the helicopter. How much time does it take for the package to hit the ground
A baseball bat has a mass of 0.82 kg and is 0.86 m long. It's held vertically and then allowed to fall. What is the bat's angular acceleration when it has reached 20° from the vertical
two equally charged particles held 4.2 x 10-3 m apart are released from rest. the initial acceleration of the first
A suvey ship on an oceanographic mission sends out a test sound and detects the echo of the wave reflected from the ocean floor directly below 1.291 s later. How deep is the ocean at this point
A .32 caliber bullet fired from a revolver with a 3 in long barrel will have a relatively low muzzle speed of about 200 m/s. how fast will it be moving when it returns
Two stars are 2.0 x 1011 m apart and are equallydistant from the earth. Find the maximum distance that these stars could be from the earth
When the cylinder is rotating at 2.0 revolutions per second, determine the magnitude of the centripetal acceleration at the outer wall?
Ignoring respiratory and perspiration losses, determine the energy conversion efficiency of the muscular contractions.
You are standing on the ground at the origin of a coordinate system. An airplane flies over you with constant velocity parallel to the x axis and at a constant height of 9.00 103 m. At t = 0, the airplane is directly above you so that the vector l..
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