The graph shows two runners participating in a race. a graph with horizontal axis time (seconds) and vertical axis position in (meters). a green line runs from 0 seconds 5 meters to 10 seconds 30 meters. a blue line runs in straight segments from 0 seconds 0 meters to 2 seconds 8 meters to 4 seconds 11 meters to 7 seconds 20 meters to 75 seconds 28 meters. a green blox below the graph is labeled daniella and a blue box below the graph is labeled leonard. which best describes the runners? daniela had a 5 meter head start, and leonard caught up to her at 25 meters. daniela ran faster than leonard through the entire race. daniela gave leonard a 5 meter head start and caught up to him at 25 meters. daniela ran slower than leonard, but she went faster at the end.

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these