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Q. A Carnot engine whose high-temperature reservoir is at 620 takes in 570 of heat at this temperature in each cycle and gives up 325 to the low-temperature reservoir.How much mechanical work does the engine perform during each cycle?What is the temperature of the low-temperature reservoir?What is the thermal efficiency of the cycle?
Q. If a violin string transmits waves at 375 m/s and has 295 Hz as its fundamental frequency, what is the string's length?
The lander is 8.2 meters above the surface and has the downward speed of 0.89 m/s while the engine is cut off. What is the speed of the lander just before it touches the surface.
As part of a safety investigation, two 1800 cars travelling at 18 are crashed into different barriers. Find an average forces exerted on (a) car that hits a line of water barrels and takes 1.80 to stop, and (b) car that hits a concrete barrier and ta..
What is an angular acceleration
Obtain a relation between the equilibrium lattice distance
Find density of the object
lady ate a whole medium size pizza storing up 120 food Calories. This energy is used to heat up 2 liters of water from a certain initial temperature to a final temperature of 80 deg.C, what was the initial temperature of the water?
A block of unknown mass, m, is brought into the configuration shown. It was measured that upon release the block shot upward a maximum distance of 2m. Calculate the mass of this block? The upper spring has a natural length of 1m, and the lower spr..
Which kinetic energy equals to rotational motion
What is final speed of the block
Find out the frequency of the fourth harmonic if the string is fixed at one end and free at other. (That is, if the free end is attached to a long string of negligible mass.)
What is first order diffraction angle of light
Galaxies form by gravitational collapse of regions that are denser than average. Noting that the present day average mass density of the universe is ρ = 3 × 10-30 g/cm-3, estimate how long it takes for a galaxy to collapse.
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