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A Carnot engine operates between the temperatures 420K and 300K
a) How much heat must be given to the engine to produce 2600J of work?
b) How much heat is discarded to the cold reservoir as this work is done?
What is the focal length of the contact lenses that will enable him to see distant objects clearly
Two blocks with masses, 2.5kg and 3.5kg, rest on a frictionless surface and are connected by a light string, What is the magnitude of the force in the string
Calculate the speed of the fetal heart wall at the instant this measurement is made.
A lead ball is dropped into a lake from a diving board 5 above the water. After entering the water, it sinks to the bottom with the constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.20 after it is f..
A mass of 0.006 kg is attached to a spring that requires a force of 0.01 N to extend it 0.05 meters greater than its natural length, Find maximum velocity of spring when released from rest
A bird feeder in the shape of a 50-cm-diameter disk of mass 340 g, suspended by a wire with torsional constant 5.00N?m/rad, What is the mass of the birds, assuming they have the same mass
A railroad car of mass m moving at v collides completely inelastically with a stationary railroad car of mass 2 m and couples to it
A projectile is fired horizontally from a gun that is 88-m above flat ground, emerging from the gun with a speed of 250m/s.
Photons of wavelength 490 nm are incident on a metal. What is the work function of the metal
A 23kg chimpanzee hangs from the end of a horizontal, broken branch of length L_0 = 1.6m, What is the shear modulus for this branch
Object A is metallic and electrically neutral. It is charged by induction so that it acquires a charge of -2.86E-6 C. Calculate the difference in mass between the charged objects
A potential difference of 5.60 V will be applied to a 33.00 m length of 18-gauge tungsten wire (diameter = 0.0400inches). Calculate the current and Calculate the current density
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