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The net entropy changes when a 81g ice cube initially at 0 degrees C melts in a room. What is the net entropy change if room temperature =19 degrees C? What is the net entropy change if room temperature =40 degrees C?
an airplane flying at a constant speed of 160 m/s pulls out of a dive in a circular arc. the 80 kg pilot presses down on his seat with a force of 3000 N, What is the radius of the arc
A 200 kg object and a 500 kg object are separated by 1.2 m. A 150 kg object is placed half way between the two objects, What is the gravitational potential energy of the three masses
A car traveling initially at 7.0 m/s accelerates to velocity 12.0 m/s in 2.0 s. What is the average acceleration of the car
A 140 kg hockey player skating at -12 m/s runs into the back of a referee that weighs 70 kg and is traveling in the same direction but at only -6 m/s. what will the velocity of the referee be after the collision
A child on a swing of length R= 2 meters is given an initial velocity v=8.9 m/s. Calculate the height from the bottom when the cord just goes slack, and the child leaves the circular path
A generator uses a coil that has 210 turns and a 0.20-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. assume that each turn of the coil is a square (an approximation), conclude the length of wire f..
A laser with wavelength d/8 is shining light on a double slit with slit separation 0.3 {rm mm}. This results in an interference pattern on the screen a distance L away from the slits. We wish to shine a second laser, with a different wavelength, t..
The initial angle of the ball’s motion off the tee is 29.0° above the horizontal. If the tee level is 17.0 m above the level of the fairway, explain how far east of the tee does the ball hit the fairway?
Blocks A (mass 6.50kg ) and B (mass 15.00kg ) move on a frictionless, horizontal surface. Initially, block B is at rest and block A is moving toward it at 10.0m/s . The blocks are equipped with ideal spring bumpers.
The plates of a parallel-plate capacitor are 3.00mm apart, and each carries a charge of magnitude 75.0nC. What is the area of each plate
Find an expression for work done by the gas
question1a 67 human sprinters can accelerate from rest to 11 in 3.0. throughout the similar interval a 32 greyhound can
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