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A thermoelectric refrigerator removes heat from a refrigerated space at -5°C at a rate of 130 W and rejects it to an environment at 20°C. Determine the maximum coefficient of performance this thermoelectric refrigerator can have and the minimum required power input.
Two astronauts, one mass 60 and the other 80kg are initially at rest and then they push each other apart. How far apart are they when the lighter astronaut has moved 12 m in outer space?
a sealed metal container contains a gas at 20 degrees celsius and 1 atm. to what temperature must the gas be heated to
a 5-microf capacitor is charged to 30 v and is then connected across a 10-microh inductor. the maximum value of the
A 24.0 g copper ring at 0.000°C has an inner diameter of D = 2.54000 cm. An aluminum sphere at 103.0°C has a diameter of d = 2.54508 cm. What is the mass of the sphere
A uniform 7.6 kg ladder is leaning against a frictionless vertical wall, with which it makes a 15 deg angle. how massive a person would make the ladder slip
In an experiment, five identical bags of rice are balanced by a 10 kg mass. Two bags of rice are added to the other five. What mass will now balance the bags?
A proton initially at rest is accelerated by a uniform electric field. Find the voltage drop through which the proton moves
Helium neon laser light has a wavelength in air of 632.8 nm. What is the energy of a single photon in the beam
A motorist suddenly notices a stalled car and slams on the brakes, decelerating at the rate of 6.3 m/s2, How much time elapsed from the initial braking to the collision
A wire coil of 20 turns has a cross-sectional area of 16 cm2. The coil is placed in a uniform field of a large magnet with B = 0.17 T. What is the magnitude of the average emf produced
A gas of diatomic molecules is in equilibrium at a temperature of 340 K. Find what is the rms angular speed of the molecules
Explain how long does it take the engine to lift the crate a vertical distance of 18.7 m? Friction in the system is negligible.Please provide step-by-step method to solving the problem.
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