How many times bigger is an egg
cell (0.2mm) than a sperm cell
(0.05mm)?

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.