Jeanette is playing in a 9-ball pool tournament. she will win ifshe sinks the 9-ball from the final rack, so she needs to line upher shot precisely. both the cue ball and the 9-ball have massimage for jeanette is playing in a 9 - ball pool tournament. she will win ifshe sinks the 9 - ball from the final rack, and the cue ball is hit at an initial speed of v_i. jeanette carefully hits the cue ball into the9-ball off center, so that when the balls collide, they move awayfrom each other at the same angle theta from the direction in which the cue ball was originallytraveling (see figure). furthermore, after the collision, the cueball moves away at speed v_f, while the 9-ball moves at speed v_9. view figure
for the purposes of this problem, assume that the collision isperfectly elastic, neglect friction, and ignore the spinning of theballs.

Asample of a gaseous substance changes into a liquid

1.in one challenge on the titan games, competitors have to lift 200 pounds up a long ramp. angel is able to move the weight in 42 seconds. anthony gets it done in only 38 seconds. which statement is true? angel has more power than anthony. angel does more work than anthony. anthony does more work than angel. anthony has more power than angel. 2.a mountain climber exerts 41,000 j of work to climb a cliff. how much power does the climber need if she wants to finish in only 500 seconds? power = work / time 20,500,000 watts 82 watts 0.0122 watts 41,500 watts 3.your family is moving to a new apartment. while lifting a box 83 joules of work is done to put the box on a truck, you exert an upward force of 75 n for 3 s. how much power is required to do this? (hint: you only need two of the 3 numbers given! ) power = work / time 249 watts 25 watts 2075 watts 27.7 watts

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth