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A Styrofoam cup holding 90 g of hot water at 95°C cools to room temperature, 23.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temperature of the room.
What is the source of charge carriers moving in an electric circuit, and what is the role of the battery/source in that movement
A block with a mass m= 5.7 kg is pulled up a 29 degree incline with the force of magnitude F = 38N. Find the acceleration of the block if the incline is frictionless
When resistors 1 and 2 are connected in series, the equivalent resistance is 21.4 ?. When they are connected in parallel, the equivalent resistance is 4.08
What is the internal resistance of a 12 V car battery whoseterminal voltage drops to 9.90 V when the starter draws 73.8 A? What is the resistance of the starter
A solid sphere rolls without slipping or sliding along a horizontal surface toward an incline. Calculate the kinetic energy of sphere as it rolls along the horizontal surface
An alternating source drives a series RLC circuit with an emf amplitude of 6.07 V, at a phase angle of +33.3°. what is the potential difference across the inductor
A certain kind of glass has an index of refraction of 1.660 for blue light of wavelength 420 nm, what is the angle between the two beams inside the glass
What is linear acceleration
A wedding ring is tossed into the air and given a spin, resulting in an angular velocity of 12.5 rotations per second. what is the diameter of the ring
A Rubber ball mass m movie at a speed of 1.0 m/s in the positive x direction hits another rubber ball of a mass 2m at rest. what are the speeds and directions of the two balls moving afterwards
A 501g mass oscillates with an amplitude of 11.0cm on a spring whose spring constant is 23.0N/m, determine the period and max speed
A 49.5 kg boy jumps on a 4.95 kg pogo stick with spring constant 3650 N/m, Find the period of the boy's motion
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