[high dive) above a pool of water. according to the announcer, the divers enter the water at a speed of 56 mi/h (25 m/s). (air resistance may be ignored in this problem.) ve] visitors at an amusement park watch divers step off a platform 70 ft (a) is the announcer correct in this claim? explain. (b) is it possible for a diver to leap directly upward off the board so that, missing the platform on the way down, the diver enters the water at 25 m/s? if so, what initial upward speed is required? is the required initial speed physically attainable? how do you know?

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.