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An object of heat capacity 100 cal/°C is initially at 30°C.
(a) Estimate the entropy change of the object after it is dropped into a swimming pool at 26°C.
(b) Estimate the resulting entropy change of the universe.
While a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude F=ax+bx^2, where a and b are constants. The work completed in stretching this rubber band from x=0 to x=L is what.
Two simple pendulums have length of 81-cm and 64-cm they are released from the same angular position at the same instant. After how much time would they both arrive at their initial position simultaneously.
Two small insulating spheres with radius 9×10-2 are separated by a large center-to-center distance of 0.52. One sphere is negatively charged.
What is the magnitude of the total linear acceleration of a piece of metal on the very outer edge of the flywheel 4.1 seconds after it started to rotate
Heavy rains have flooded your professor's basement to a depth of 6 cm. This basement is 12 m by 10 m in area. find the speed of the stream of water leaving the hose
three forces are applied to a bracket as shown. determine the range of values of alpha for which the magnitude of the resultant forces acting on a is less than 600n
A hypothetical neutral atom has 93 electrons and a nucleus of mass m = 2.23e-25 kg. Calculate the speed of orbit of this electron
compute the force exerted by the man, the work done by the man on the piano, the work done by the friction force, the work done by the force of gravity, and the net work done on the piano.
A 1000-kg car is moving at 30 m/s around a horizontal curve whose radius is 100m. What is the magnitude of the frictional force
The function y(x, t) = (25.0 cm) cos(?x - 20?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant when that point has the displacement y = +22.0 cm?
What is vertical component of the acceleration
A 1850-kg car experiences a combined force of air resistance, At what angle is the hill inclined above the horizontal
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