What speed keeps the cylinder at rest
A puck of mass m = 1.00 kg slides in a circle of radius r = 23.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.80 kg by a cord through a hole in the table. What speed (in m/s) keeps the cylinder at rest?
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Two long parallel wires whose centers are 21.0 cm apart are part of the same circuit. Each wire carries equal currents in opposite directions.
The time X it takes to reboot a certain system has Gamma distribution with E(X) = 20 min and Std(X) = 10 min. Compute parameters of this distribution.
The coinage metals-copper, silver, and gold-crystallize in a face center cubic structure. Use the density of copper of 8.95 g/cm^3 to calculate the atomic radius of copper.
Four balls, each of mass m, are connected by four identical relaxed springs with spring constant k. The balls are simulataneously given equal initial speeds v directed away from the center of symmetry of the system.
An office copier uses a lens to place an image of a document onto a rotating drum. The copy is made from this image. (a) What kind of lens is used? Should it be 1 - converging, or 2 - diverging? (Give the number of the correct answer.)
For a steel furnace, silica refractories have corrosion rates of 2E-7 m/s at 1,345OC and 9E-7 m/s at 1,510OC. Calculate the activation energy for the corrosion of these silica refractories.
Assume a flipping a coin has a 50 - 50 chance of heads or tails. You flip a coin until the first time it comes up tails. What is the probability that it will take exactly three flips.
Calculate the electric field required to drive 0.15 amperes of current through the glowing bulb and show that it is huge compared to the field in the connecting copper wires.
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