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A freezer is used to freeze 1.0 Lof water completely into ice. The water and the freezer remain at aconstant temperature of T = 0°C.
(a) Determine the change in the entropy of thewater.
____J/K
(b) Determine the change in the entropy of the freezer.
_____J/K
Two wheels have the same mass and radius of 4.8 kg and 0.50 m, respectively. Find the net external torque that acts on each wheel
A tetherball leans against the smooth, frictionless post to which it is attached. what is the force the pole exerts on the ball
Two circus performers, Jack and Jill, whose total mass is 120 kg, start a swing which is 5 m long such that initially the rope attached to their swing makes an angle of 36 degrees with the horizontal.
A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling. what is the bicyclist's speed at the bottom of the hill
Two atoms of masses m1 and m2 are bound together in a molecule with energy so low that their separation is always close to the equilibrium value r0. With the parabola apporximation, the effective spring constant is k = (d2U)/(dr2) evaluated at r0
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 2.84 x 10^-11m. Determine the kinetic energy of the electron
A 1500 kg car is headed directly for a brick wall when the driver realizes the danger and slams on the brakes. The car's initial speed is 32 m/s, Determine how far the car travels while skidding to a stop
A steam locomotive uses the back-and-forth motion of a drive rod to turn its 1.55 m diameter wheel. Each compete oscillation of the rod corresponds to one wheel revolution.What's the rod's oscillation frequency when the train is moving at 30 m/s ?
A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.16 s). what average force does the punter exert on the ball
light of wavelength 6.7x10^-7m travels first through air, and then enters a medium of higher index of refraction. what is the new speed of the light wave
A cylindrical chamber, open at the bottom, is to be submerged in the ocean and used as a diving chamber, What will be the height h of the air in the cylinder
The electrric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude E. What is the magnitude of the electric field
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