14. Two planes with different speeds are flying from New York to Los Angeles. The two cities are 2000 miles apart. Each plane flies at constant velocity, 396 mi/h for the slower one and 550 mi/h for the
faster one. When the faster plane arrives, how far away from Los Angeles will the slow plane be?
560.02 mi
+

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c

Ascientific blank must be testable and capable of being proven false?