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A refrigerator uses 40.0 J of work to extract 90.0 J from a heat reservoir at 0.00°C. What is the coefficient of performance for the refrigerator?
A vertical electric field of magnitude 2.45 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. Determine the electric flux through the bottom of the car
The water pump on the engine of an automobile has a mass flow rate of 8.30 lbm/s. The water enters at 0.00 psig with a velocity of 1.00 ft/s and leaves at 10.0 psig with a velocity of 10.0 ft/s with no change in height or tempe..
A rod supports a 2.35 kg lamp. a) What is the tension in the rod? b) Estimate the components of the force that the bracket exerts on the rod.
A cat is trying to jump onto a countertop that is 1m tall from 0.3m away. The cat's initial jump speed (magnitude of the total initial velocity) is 10m/s
How much work is needed to move a 120-kg refrigerator.
Two cylinders have the same radius R = 0.6 m and length 0.6 m, but one is a solid cylinder of massM1 = 4.5 kg, What is the ratio of the final speed of the solid cylinder to that of the hollow cylinder
A brave child decides to grab on to an already spinning merry-go-round. The child is initially at rest and has a mass of 34.5 kg. What is the moment of inertia of the merry-go-round
Suppose that the speed of light in a vacuum were one million times smaller than its actual value: c = 3.00 x 102 m/s. Determine how far you would have to compress the spring from its equilibrium length
Assume the system rotates in the yz plane about the x axis with an angular speed of 2 rad/s. Find out the moment of inertia of the system about the x axis.
A 90 kg gentleman standing on slippery grass is pulled by his two rather unruly children.Overlooking friction, compute Pop's resulting acceleration
An air spaced parallel plate capacitor has an initial charge of 0.05 uC after being connected to a 10 V battery. Calculate the work done in pulling the plates apart
a child on a swing set swing back and forth if the length of the supporting cables for the swing is 2.1 m long, what's acceleration does to gravity or oscillation
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