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A 1.40 kg iron horseshoe is taken from a forge at 950°C and dropped into 4.00 kg of water at 14.0°C. Assuming that no energy is lost by heat to the surroundings, determine the total entropy change of the horseshoe-plus-water system.
A car is traveling around a horizontal circular track with radius r = 190.0 m as shown. It takes the car t = 59.0 s to go around the track once. What is the magnitude of the car's acceleration
A 410?? resistor and a 6.50??F capacitor are connected in parallel to an ac generator that supplies an rms voltage of 220V at an angular frequency of 360rad/s. Find the current amplitude in the capacitor
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.48 km. What is the magnitude of the couple's displacement
how much weight must each man support. by how much would the temperature of the air rise over a period of 2.0 h due to the metabolism of the people.
A 0.39 kg iron horseshoe that is initially at 745°C is dropped into a bucket containing 24 kg of water at 46°C. What is the final equilibrium temperature? Neglect any heat transfer to or from the surroundings.
A block of mass m = 309 g is dragged with a string across a rough horizontal table. The string tension is T = 3.59 N, What is the power supplied by the force of friction
Blue light of wavelength 450 nm passes through a 0.20-mm wide slit and illuminates a screen 1.2 m away. How wide is the central maximum of the diffraction pattern
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Determine the specific heat of the unknown second sample
A 2300 kg truck traveling north at 39 km/h turns east and accelerates to 57 km/h. What is the change in the truck's kinetic energy
A proton is released from rest at the positive plate of a parallel-plate capacitor, What will be the proton's final speed if the experiment is repeated with double the amount of charge in each capacitor plate
300. V are applied to a motor with a windings resistance of 65.0 ohms. At the maximum motor speed the back emf is 155. V. Find the current in windings as the motor starts
A string of length 0.276 m is fixed at both ends. The string is plucked and a standing wave is set up that is vibrating at its second harmonic. What is the frequency of vibration
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