You throw a frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the frisbee. ignoring air resistance, the torque exerted about its center of mass by gravity is

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario