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An engine that operates at half itstheoretical (Carnot) efficiency operates between 525?C and280?C while producing work at the rate of 850 kW. How much heat is wasted per hour?
Two boxes are connected to each other. The system is released from rest and the 2.00kg box falls through a distance of 1.00m. what is the tension in the connecting string
A 1060-kg van, stopped at a traffic light, is hit directly in the rear by a 794-kg car traveling with a velocity of +3.90 m/s. determine the final velocity of the car and the van
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.0919 N when their center-to-center separation is 52.3 cm. find the positive charge in coulombs on the other
Point charges q1 = +2.00 muC and q2 = -2.00 muC are placed at adjacent corners of a square for which the length of each side is 1.00 cm. What is the electric potential at point b
A 110 kg hoop rolls along a horizontal floor so that its center of mass has a speed of 0.0760 m/s
A 32.0 µF capacitor is connected to a 45.0 omegacap.gif resistor and a generator whose rms output is 30.0 V at 60.0 Hz. compute The phase angle for the circuit
A 7 kg sample of mercury is completely solidified and liberates 110 kJ of energy. What is the original temperature of the mercury? (The melting point of mercury is 234 K, the heat of fusion of mercury is 11.3 kJ/kg, and the specific heat of mercury i..
A physics student playing with an air hockey table (a frictionlesssurface) finds that if she gives the puck a velocity of 3.85 m/salong the length (1.78 m) of the table at one end, What is the angle of inclination
During an expansion process of a closed system, the pressure of a gas changes from 100 kPa to 400 kPa according to the following relation: P = a + bV Where “a” is a constant, “b” = 100 kPa/m3, and “V” is the volume of the system in meters cube. If th..
The potential difference between the plates of a leaky(meaning that charge leaks from one plate to the other) 2.0 uFcapacitor drops to one-fourth its initial value in 2.0s
Years ago, a block of ice with a mass of about 20 kg was used daily in a home icebox. how much heat did a block of ice that size absorb
A man of mass 77.0 kg walks down the aisle of an airplane at a speed of 1.70 m/s in the forward direction while the plane moves at a speed of 315 m/s relative to the earth. Find the man's kinetic energy relative to the earth
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