Alarge truck is crossing a bridge 1 mile long. the bridge can only hold 14000 lbs, which is the exact weight of the truck. the truck makes it half way across the bridge and stops. a bird lands on the truck. does the bridge collapse?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

The energy equivalent of the rest mass of an electron is

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d