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The pressure in ideal gas is cut in half slowly, while being kept in a container with rigid walls. In the process, 265 kJ of heat left the gas (a) how much work was done during the process. (b) what was the change in internal energy of the gas during this process.
A 12.7-kg block initially slides at 13.1 m/s on a flat rough surface and eventually stops. what is the entropy change of the system
A radio wave transmits 16.7 W/m2 of power per unit area. A flat surface of area A is perpendicular to the direction of propagation of the wave. Assuming the surface is a perfect absorber, calculate the radiation pressure on it. nPa
A weight lifter lifts a 420 N set of weights from ground level to a position over his head, a vertical distance of 1.70 m. How much work does the weight lifter do, assuming he moves the weights at constant speed?
Four identical point charges (+ 2.50 nC) are placed at the corners of a rectangle which measures 2.00m x 4.00m. If the electric potential is taken to be zero at infinity
A steel wire of length 1.97 with circular cross section must stretch no more than 0.260 when a tensile (stretching) force of 400 is applied to each end of the wire. What is the minimum diameter necessary.
After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground, What is the speed of the ball when it leaves Sarah's hand
A rifle has a mass of 4.5kg and it fires a bullet of mass 10.0g at a muzzle speed of 820 m/s. What is the recoil speed of the rifle
Assume the balloon and rod to be point charges. The Coulomb force constant is 1/(4? ?0) = 8.99 × 10^9 N·m2/C2 and the acceleration due to gravity g = 9.81 m/s2.
A little cat, Bella, walks in a straight line, which we shall call the x axis, with positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function..
projectile is launched with an initial speed of 40.0 m/s at an angle of 20.0° above the horizontal. What is the projectile's velocity at the highest point of its trajectory
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96 kg. Find the speed of the wagon after the rock is thrown
A resistor with R = 2.0 k? is placed in series with an inductor, a battery, and an open switch. What is the inductance of this circuit if, after the switch is closed
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