Acertain metal having a work function of 5.4 ev is illuminated with light of frequency 2.7 x 1015hz. determine the stopping potential (in v) that is required to stop the most energetic ejected electrons. your answer should be a number with two decimal places, do not include unit.

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.

The star nearest to our sun is proxima centauri, at a distance of 4.3 light-years from the sun. how far away, in km, is proxima centauri from the sun?

Aforce is a vector quantity because it has both?