Aconstruction crane weighing 12.000 lbf fell rom a height of 400 t to the street below during a severe storm. for g 32.05 t/s? determine the mass, in lb, and the change in gravitational potential energy of the crane, in ft lbf.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

What human activity increases beach erosion?