List 4 significant problems with nuclear power plants.

What is a good example of instantaneous speed

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

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