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2.0 kg of water at 14 C is mixed with 2.0 kg of water at 53 C in a well-insulated container. Estimate the net change in entropy of the system. Express your answer using two significant figures.
A bat flying in complete darkness emits high frequency sound of 100 kHz to locate objects. What is the frequency in which the bat is received
Two spherical shells have a common center. A -3.00 x10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +4.00 x10-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m. Find the magnitu..
A 0.50 kg mass is attached to a spring with a force constant of 30 N/m, How far is the mass from the equilibrium position when its speed is half the maximum speed
A 2-kg block of ices slides frictionlessly down a plane inclined at 22° a distance of 2 m. What is the normal force on the block of ice
A 0.570 kg ball is dropped from rest at a point 1.50 m above the floor. The ball rebounds straight upward to a height of 0.800 m. Illustrate what are the magnitude and direction of the impulse of the net force applied to the ball during the collis..
A string is wrapped around a disk of mass m = 1.9 kg and radius R = 0.12 m. Starting from rest, you pull the string with a constant force F = 8 N along a nearly frictionless surface. At this instant, how much rotational kinetic energy does the disk..
A roughly spherical volume of rock 2.1 km in radius is 30% denser than the surrounding rock, calculate the gravitational acceleration it produces at Earth's surface
A11-g coin slides upward on a surface that is inclined at an angle of13°above the horizontal. Find the magnitude and direction of the force of friction
An underwater scuba diver sees the Sun at an apparent angle of 42.0° from the vertical. What is actual direction of the Sun
Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. Their dog, Spot, starts from Arthur's side at the same time and runs back and forth between them. By the time ..
A child's toy consists of a piece of plastic attached to a spring, estimate the force constant of the spring
A flywheel has a constant angular deceleration of -2.99 rad/s2. Find the time required for the flywheel to come to rest
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