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An ideal refrigerator or an ideal heat pump is equivalent to a Carnot engine running in reverse. That is, energy Qc is taken in from a cold reservoir and energy Qh is rejected to a hot reservoir. Find the work that must be supplied to run the refrigerator or heat pump. Your answer must be in terms of Th, Tc, Qc.
You are asked to construct a capacitor having a capacitance near 1 nF and a breakdown potential in excess of 10,000 V, What is the breakdown potential of this capacitor
An electron is accelerated from rest through a uniform electric field of 4000 V/m. How much is the change of potential energy of this electron
a how far from the center of the earth is the center of gravity of the earth-moon system? note the radius of the earth
A moving 3.10 kg block collides with a horizontal spring whose spring constant is 392 N/m. What is the speed of the block when it hits the spring
One sphere is negatively charged, with net charge -2.25 mu C, and other sphere is positively charged, with net charge 4.00 mu C. The charge is uniformly distributed within the volume of each sphere.
in an rc series circuit 16.0 v r 1.60 m and c 1.80 microf. a calculate the time constant. s b find the maximum
A common flashlight bulb is rated at 0.202 A and 3.82 V (the values of current and voltage under operating conditions, estimate the temperature of the tungsten filament when the bulb is turned on
A roller coaster car of mass 250 kg has a speed of v0 = 12 m s-1 at point A, located at a height of h = 15 m. Find the speed of the car when it reaches point B. Use energy ideas
For all parts, assume that the "island" refers to the point at a distance D from the point at which the package is released. Ignore the height of this point above sea level. Assume that the acceleration due to gravity is g = 9.80m/s^2. What is the..
calculate the ratio of earths rotational kinetic energy due to its rotation around its axis and the translational
To determine the specific heat of an object, a student heats it to 100 degrees C in boiling water. If the final temperature is 23.8 degrees, what is the specific heat of the object
A 55 kg person riding a bike puts all her weight on each pedal when climbing on a hill. How could she exert more torque
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