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A heat engine operates between two reservoirs at temperatures of 21.2oC and 316oC. What is the maximum efficiency possible for this engine?
A 6.0kg crate is pushed from the top of an incline and travels down the incline with an initial speed of 8m/s.find loss of potential energy
An arrow with a mass of 80 g is fired at an angle of 30 degree tothe horizontal. what was the initial velocity of the arrow
The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. Find the minimum voltage placed across the arms that would produce a current that could be felt by a man with dry skin
how is the graph of the total volume of a bathtub while the water inflow rate follows a seesaw pattern for half of the time and the similar pattern for outflows on the other half.
2.00-mol sample of helium gas initially at 300 K, and 0.500 atm is compressed isothermally to 2.00 atm. Noting that the helium behaves as an ideal gas, find (a) the final volume of the gas, (b) the work done on the gas, and (c) the energy transferred..
A 1,500kg satellite is placed in an orbit 8,000km above the surface of the Earth. a. What is the gravitational acceleration of the Earth at that altitude? b. What is the speed of the satellite? c. How long does it take the satellite to go around the ..
A uniform electric field of about 100 V/m pointing straight down, exists just above Earth's surface. what uniform surface charge density would be required
An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. The heavier fragment slides 9.10 m before stopping. How far does the lighter fragment slide
The rails are laid on a winter day when their temperature is 1.8°C. (a) How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 32.2°C
When a single high-resistance (long) bulb is connected to a 1.5 volt battery, the current through the battery is about 80 milliampere. If you add another high-resistance (long) bulb in parallel, the battery current of course increases to 160 milliamp..
A 35 g bullet moving at 475 m/s strikes a 4.20 kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 270 m/s. How fast is the bag moving when the bullet exits.
Estimate the Doppler shift for a radio wave reflected from an airplane moving directly toward you at a speed of 298 m/s. Assume the radio wave has a frequency of 8.9 106 Hz
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