An object is placed 23.5 cm in front of a convex mirror of focal length 50 cm. Note: Do convex mirrors have a positive or negative focal length

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

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.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration