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A 0.350-kilogram cup at 10 °C is filled with 0.100 kg of boiling coffee. The cup and the coffee come to thermal equilibrium at 50 °C. If no heat is lost, what is the specific heat of the cup material? [Hint: Consider the coffee to be essentially boiling water.]
Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its startin..
Two moles of an ideal gas are placed in a container whose volume is 6.2 x 10-3 m3. find the average translational kinetic energy of a molecule
A straight wire segment 4 m long makes an angle of 30° with a uniform magnetic field of 0.37 T. Find the magnitude of the force on the wire
In a photoelectric effect experiment, visible radiation of energy 2.68 eV is incident upon a metal of unknown work function. determine the work function of the metal
A 35.1 kg girl and a 58.4 kg boy are on the surface of a frozen lake, 14.5 m apart. Calculate the magnitude of the girl's acceleration
The pulmonary artery, which connects the heart to the lungs, is 8.5 cm long and has a pressure difference over this length of 450 Pa. If the radius of the artery is reduced by 14% , by what factor is the blood flow rate reduced
Tim and Rick both can run at speed v_r and walk at speed v_w, with v_{rm r} > v_{rm w}. They set off together on a journey of distance D. Rick walks half of the distance and runs the other half. Tim walks half of the time and runs other half.
You wind a small paper tube uniformly with 173 turns of thin wire to form a solenoid. What is the inductance, in microhenries, of your solenoid
If you weigh 670 on the earth, illustrate what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0?
Zorch, an archenemy of Superman, decides to slow the earth's rotation to once per 31.0 h by exerting an opposing force at the equator and parallel to it. find how long Zorch must push with this force to accomplish his goal
A uniform 1.6-kg rod that is 0.91 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
A(n) 84 g arrow is fired from a bow whose string exerts an average force of 110N on the arrow over a distance of 80cm. What is the speed of the arrow as it leaves the bow.
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