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Q1. A crate of 31.9- tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 345. After that you must reduce your push to 247 to keep it moving at a steady 29.0.
Q2. Consider a system of two bound particles (e.g., two nucleons bound by the weak force), of spins S1, S2, with s1 = s2 = 1/2. In an external magnetic field, the interaction Hamiltonian is H = µB • S, with S = (S1 + S2). A random distribution (containing particles of all possible wave functions) of these systems is passed during a Stern-Gerlach apparatus with B = (-ax, 0, Bo+ az), with |Bo| >> |az| and |Bo|>> |ax|. The deflected beams are discarded. What would be the result of a measurement of S^2 on the surviving states? Give details.
(1) 0 for all of them
(2) 2 hbar^2 for all of them
(3) none of above (explain)
You took a job as a space station scientist. On a spacewalk you get separated from the station. At what speed will you move back toward the station
As part of an excercise program, a woman walks south at a speed of 2.00 m/s for 60 minutes. She then turns around and walks north a distance of 3000 m in 25.0 minutes
Draw a careful diagram of the set up of the reference point method of finding an image. explain how you found the object and image distances
a 0.45 kg croquet ball is initially at rest on the grass. when the ball is struck by a mallet, how long was the mallet in contact with the ball
A 0.14 meter string clamped at both ends under a tension of 16 N has a fundamental frequency of 135 Hz. What is the mass density of the string
While rearranging a dorm room, a student does 292J of work in moving a desk 3.90m. What was the magnitude of applied horizontal force.
One end of an iron rod 40 cm long and 3.3 cm in diameter is in ice water, the other in boiling water. What is the heat-flow rate along the rod
Kras, Inc., was organized and authorized to issue 50,000 shares of $100 par value, 9 percent [referred stock and 50,000 a shares of no-par, $5 stated value common stock on July 1, 2011.
You create a diffrent kind of pendulum by swinging a meter stick (mass m) on its end. It swings with small oscillations. Determine the angular frequency w ( I=1/3 ML ^2)
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3 , length 91.6cm and diameter 3.00cm from a storage room to a machinist. Calculate the weight of the rod
A cheetah is traveling across the African countryside, initially moving at a constant velocity of 15 m/s. What is the average acceleration of the cheetah from t = 0 to t = 4.0 seconds
A skydiver drops from a hot air balloon floating 5000 meters above the ground. What was the average vertical speed of the skydiver
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