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The energy provided each hour by heat to the turbine in an electric power plant is 9.5 x 10^12 J. If 6.5 x 10^12 J of energy is exhausted each hour from the engine as heat, what is the efficiency of this heat engine?
A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N2/N1 for a particular transformer used in a CD player is 9:42. find the rms output voltage of the transformer
A 1.00x10^2 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.200. What must be the magnitude of P, so that the net work done by it and the k..
Find the magnitude of book's velocity, just before the book reaches the floor. Find the direction of book's velocity, just before the book reaches the floor.
In a non-uniform gas, the equation of state is valid locally, as long as the density does not change too rapidly with position. Find the density as a function of height
A goose flying toward you at 13.8m/s emits a squawk, which you hear at 265Hz. Find the wavelength of the sound you hear
A 3.18-nF parallel-plate capacitor is charged to an initial potential difference ?Vi = 100 V and is then isolated. How much work is required to withdraw the porcelain sheet
An electron of mass 9.11×10?31 leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, Find the Time to reach the grid
2.00 moles of an ideal gas is at a pressure of 1.50 atmospheres, What is the average kinetic energy per particle in the gas
A 12.0-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 12.2 m/s, determine the rotational kinetic energy about its center of gravity
A rope, under a tension of 370 N and fixed at both ends, oscillates in a second-harmonic standing wave pattern. What is the speed of the waves on the rope
A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular paths
A standing observer perceives a train whistle to have a frequency of 300 Hz. what is the frequency of the sound waves emitted from the train
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