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An electric heater plugged into a 115-V AC outlet uses an average electric power of 1200 W. What are the maximum instantaneous power and the minimum instantaneous power?
Water at 2 kg/s is the working fluid in the power cycle shown below. Saturated liquid at 10 kPa enters the pump, What is the overall efficiency of the entire cycle
A ray of light makes an angle of 25 degrees with the normal to a plane mirror. through what angle is the reflected ray rotated
A listener increases his distance from a sound source by a factor of 3.62. what is the change in the sound intensity level in dB
A man strikes a nail with a 1kg hammer. The speed of the hammer just before it strikes the nail is 5m/s, What is the force exerted on the nail by the hammer
The magnetic field of a cylindrical magnet that has a pole-face diameter of 3.3 cm can be varied sinusoidally between 29.6 T, find the amplitude of the electric field induced by the variation
A force F applied to an object of mass m1 produces the acceleration of 3.10 m/s2. The same force applied to a second object of mass m2 produces an acceleration of 1.90 m/s2.
A storage tank at STP contains 19.1 kg of nitrogen What is the volume of the tank. What is the pressure if an additional 15.7kg of nitrogen is added without changing the temperature.
Three successive resonance frequencies of an air column are 75, 125, and 175 Hz, What is the fundamental (lowest) frequency
q1. a 170 g block hangs from a spring with spring constant 9.0 nm. at t0 s the block is 24 cm below an equilibrium
A point on the edge of a 2 m diameter wheel moves at a speed of 5 m/s with respect to the axle. What is the angular velocity of the wheel
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.00 m/s at an angle of 20.0° below the horizontal. Find the height from which the ball was thrown
A bullet of mass m = 8.00 g is fired into a block of mass M = 190 g that is initially at rest at the edge of a table of height h = 1.00 m (see figure below). The bullet remains in the block, and after the impact the block lands d = 1.50 m from the bo..
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