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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.
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked. how far did they skid
For the superball in the previous question, if it was in contact with the table for 32 ms, calculate the average force exerted on the ball by the table
A projectile that is fired from a gun has an initialvelocity of 90.0 km/h at an angle of 60.0o above thehorizontal. When the projectile is at the top of its trajectory, aninternal explosion causes it to separate into two fragments ofequal mass.
The unpolarized light of intensity I(not) is passed through two polarizers with axes oriented at 30degrees from each other. What intensity of light emerges
Determine the length of a copper wire that has a resistance of 0.172 Ohms and cross-sectional area of 7.85 × 10^-5 m^2. The resistivity of copper is 1.72 × 10^-8 Ohms m
A 7.8 gram bullet leaves the muzzle of a rifle with a speed of 445.5 m/s. Determine constant force is exerted on the bullet while it is traveling down the 0.6 meter length of the barrel of the rifle
A football is kicked across a level field. The ball spends 2.53 s in the air and lands 55.9 meter from the point where it was kicked. Find the speed of the ball at the top of its trajectory
a magnetic field has a magnitude of 1.2 x 10-3 t and an electric field has a magnitude of 4.6 x 103 nc. both fields
The rotational spectrum of the HCl molecule contains lines with wavelengths of 0.0604, 0.0690 ,0.0804 ,0.0964 , and 0.1204 mm. What is the moment of inertia of the molecule
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How much charge moves during this time
A uniform disk of mass M = 1.6 kg and radius R = 0.18 m rotates counterclockwise at a constant rate of 36 rev/s about its central axis. Determine the radial acceleration of a point on its rim
There are four coils of wire being used as electromagnets. They all have the equal size and are made up of the same material but have a different number of loops.
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