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A heat engine operates between 800 K and 300 K, but its efficiency is only 80 percent of the maximum possible. Evaluate what is the actual efficiency of the engine?
A ray of light passing through water struck the water glass interface making an angle 50 with the interface. find the angle of refraction of the light in glass
A pendulum bob of length L has its motion interrupted by the peg perpendicularly beneath the support. The bob is released when the string is horizontal. Find out the minimum value for y in order for the bob to swing in a complete circle. State thi..
A gate in an irrigation canal is in the form of a semi-circle with radius of 4m(straight side on top). Find the hydrostatic force on the gate
A fighter jet going 350 km/h dives at an angle of 25o to the vertical. Compute the velocity of the bomb just before it hits the ground
q1. a gadget of mass 17.52kg floats in space without motion. because of some internal malfunction the gadget violently
Consider two parallel wires placed 0.0430 m apart. One wire carries a current of 6.16 A and the other wire carries a current of 7.88 A. Find the force per length
The objective lens of the refracting telescope at the Lick Observatory in California has a focal length of 57 ft. What is the refractive power of this lens
A 0.314 kilograms mass is attached to a spring with a force constant of 13.8 N/m. find its speed when it is 0.134 millimeter from equilibrium
What is the angular speed of a rotating wheel that has a moment of inertia of 0.330 kg.m^2 and a rotational kinetic energy of 2.75J
in a certain region of space electric field is along the z-direction throughout. the magnitude of electric field is
The ceramic coffee cup in the figure below, with m = 135 g and c = 1090 J/(kg · K), is initially at room temperature (24.0° C). If 275 g of 80.3 C coffee and 12.2 g of 5.00° C cream are added to the cup, what is the equilibrium temperature of the sys..
A pendulum 2 meters long is positioned so that the pendulum bob is at the focus of a concave mirror when the bob is at rest. The bob is then displaced halfway to the mirror and released. When will the pendulum bob produce a real image in the mirror? ..
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