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A copper rod has a length of 1.0 m and a cross-sectional area of 4.1 x10-4 m2. One end of the rod is in contact with boiling water and the other with a mixture of ice and water. What is the mass of ice per second that melts? Assume that no heat is lost through the side surface of the rod.
The critical angle for total internal reflection for sapphire surrounded by air is 34.4°. Calculate the index of refraction of the substance
q1. fuel aboard a rocket has a density of 2770 kgm3 and is ejected with a speed of 3270 ms. if the engine is to provide
At what energy does an electron become "relativistic"? Consider electrons with kinetic energies of 50 eV, 50 keV, and 50 MeV. When is it important to use the relativistic formulas
Compute the final equilibrium temperature.
The arm of a person weighs 41.5N, which acts at the center of mass that is located 29.0cm from the rotation point in the shoulder. What is the force required by the deltoid muscle, Fd, to hold the arm parallel to the floor
Two crates, of mass 75.0 kg and 109 kg, are in contact and at rest on a horizontal surface. A 732 N force is exerted on the 75.0 kg crate. What is the force the each crate exerts on the other.
A 75- kg child sits in a swing suspended with 3.2- m-long ropes. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is let go
A ball is thrown at an initial velocity of 105 mph upward at a roof. The ball is thrown a distance of 100 ft from the building. The building is 525 ft tall. Will the ball reach the roof
The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. What is the angular separation between the red and violet components of the spectrum that emerges from the glass
An AC generator is designed to produce a maximum EMF of 170V while rotating with an angular speed of 3600 rpm. how many turns of wire are needed
On a laboratory air table, a puck moving due north at 3.5 m/s collides with an iddentical puck moving at 2.0 m/s, 45 degrees S of W. What is the speed and direction of the second puck
a man with mass m1 61 kg stands at the left end of a uniform boat with mass m2 168 kg and a length l 2.6 m. let the
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