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A Carnot engine operates between reservoirs at 550K and 300K, discarding 1500 J of heat in each cycle.
A) What is the engine's efficiency?
B) How much heat is supplied to the engine by the hot reservoir in each cycle?
A 23 bullet traveling 245 penetrates a 3.0 block of wood and emerges cleanly at 195 .If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
A planet of mass m = 7.05 × 1024 kg is orbiting in a circular path a star of mass M = 4.95 × 1029 kg. The radius of the orbit is R = 8.35 × 107 km
A projectile is projected from the origin with a velocity of 25.0 m/s at an angle of 50.0 degrees above the horizontal. What is the time of maximum height of the projectile? A.)2.03 s B.)3.45 s C.)1.95 s D.)2.67 s E.)3.01 s
A force vector has a magnitude of 569 newtons and points at an angle 41o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
A puddle holds 150 grams of water. If .50 grams of water evaporates from the surface, what is the approx temperature altering of the remaining water.
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.5m/s2 for a height 63.0cm, What is the speed of the shot when he releases it
Two small plastic spheres each have a mass of 1.9g and a charge of -60.0nC, By what factor is the electric force on a sphere larger than its weight
A spring with 49 N/m hangs vertically next to a ruler. The end of the spring is next to the 17-{rm cm} mark on the ruler. If a 2.0-{rm kg} mass is now attached to the end of spring, where will the end of the spring line up with the ruler marks.
A mass-spring system oscillates with an amplitude of 5.50cm. If the spring constant is 247N/m and the mass is 584g, determine the mechanical energy of the system
A 25 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 18 C in an insulated cup. What will the new water temperature be.
A square room has 3 mirrored walls of length L with one side missing. A laser is fired from the center of the open side of the room with an angle of incidence, I, what must the angle of incidence be
Three resistors, 28, 48, and 80 ?, are connected in series, and a 0.53-A current passes through them, What is the equivalent resistance
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