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The surface waters of tropical oceans are at a temperature of 28?C while water at a depth of 1200 m is at 3?C. It has been suggested these warm and cold waters could be the heat reservoirs for a heat engine, allowing us to do work or generate electricity from the thermal energy of the ocean.
What is the maximum efficiency possible of such a heat engine?
A 200 g block is pressed against a spring of force constant 1.40 kN/m until the block compresses the spring 10 cm. The spring rests at the bottom of a ramp inclined at 60.0 degrees to the horizontal.
The top of her head is 0.12m above her eyes. What is the height of the shortest mirror in which she can see her entire image? Expalin how far above the floor should the bottom edge of the mirror be placed?
A speedboat moving at 33.0 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of ?3.20 m/s2 by reducing the throttle. (a) How long does it take the boat to reach the buoy? (b)What is the velocit..
A 9.00 kg box hangs in static equilibrium. Find the tension in each rope. T1 on the left makes an angle of 15 degrees below the horizontal and is attached to the 9.00 kg box
How many liters of gasoline would give the same mechanical energy given that each liter provides 8.50x10^6 J of mechanical energy.
A 3.0-kg block sits on top of a 5.0-kg block which is on a horizontal surface. If the force is 10% greater than your answer for (a), what is the acceleration of each block
What is an average velocity of the rock
A hydrogen atom in the ground state absorbs a 20 eV photon. What is the speed of the liberated electron
A certain lightbulb has a tungsten filament with a resistance of 19.1 ? when at 20.0°C and 139 ? when hot, Find the temperature of the hot filament
A length of 20-gauge copper wire (of diameter 0.8118 mm) is formed into a circular loop with a radius of 25 cm. Find the average electrical power dissipated in the process
A rectangle measuring 30.0 {rm cm} by 40.0 {rm cm} is located inside a region of a spatially uniform magnetic field of 1.30 T, with the field perpendicular to the plane of the coil. The coil is pulled out at a steady rate of 2.00 {rm{ cm/s}} travelli..
An ideal monatomic gas is contained in a vessel of constant volume 0.340 m3. The initial temperature and pressure of the gas are 300 K and 5.00 atm, Find the specific heat of the gas
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