Light with wavelength 270 nm is shined on the metal and electrons are ejected. What is their kinetic energy

Alexander calder's mobiles are an example of motion because it uses forces of wind and water.

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

The heliocentric and the geocentric models of the solar system included these central principles