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A heat engine operating between energy reserviors of 192.83 oC and 517.28oC has 29.32% of the maximum possible efficiency. How much energy must this engine extract from the hot reservior to do 2,508.68J of work?
Work of 600 J is done by stirring and insulated beaker containing 100 gm of water? What is the change in temperature of the water
a tennis player receieves a srve with the ball travelling horizontally towards him at 50 m/s: what was the change in momentum of the ball
An electron is moving in a concentric circular orbit inside a solenoid of radius 4.89 cm, in such a manner that it grazes the inside surface of the coil at all the points of its orbit. What electric current is passing through the solenoid
The specifications associated with a commercial spectrophotometer are: Diffraction grating with 600 groves per mm. Focal length,f, 370mm. Blaze angle, first order, 500 nm. What is the reciprocal of the linear dispersion? could the two emission lines ..
What is the net force exerted by these two charges on a third charge q_3 = 53.5nC placed between q_1 and q_2 at x_3 = -1.100m
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 13 m/s, What is the initial speed of the ball, What is the initial angle of the ball with respect to the ground
A playground is on the flat roof of a city school, 6.1 m above the street below (see figure). The vertical wall of the building is h = 7.60 m high, Find the speed at which the ball was launched
A cyclist is traveling at an initial speed of 10.0m/s. She accelerated at a rate of 0.500m/s^2. What is her final speed after 9.
An underwater scuba diver sees the Sun at an apparent angle of 26? from the vertical. What is the Sun's angle of inclination
The power brick for the author's laptop computer has a power rating of 60 W. It uses a step-down transformer to convert the AC voltage from a wall socket (Vrms = 120 V) to a value near 12 V.
Positive pressure is used in blood transfusion. Suppose the pressure in a vein is 0.25kPa and the density of blood is 1.04 x 103 kg/m3, how high above the vein must the blood container be placed
Without friction, and in the absence of external forces, the sum of the potential and kinetic energies of a body is constant. More power is required while slowly lifting a box than while lifting it up quickly. Energy is required to do work. Work cann..
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