Numerade

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A cue ball initially moving at 4.2 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball’s final speed is 1.7 m/s. Find the cue ball’s angle θ with respect to its original line of motion. Consider this to be an elastic collision (ignoring friction and rotational motion). Answer in units of ◦

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Multiple Choice. 2 points In her sixth-grade classroom, Dr. Quast has several students who don't cooperate when she tells the class to get into group formation. These students vocally share how much they dislike group work. Dr. Quast told them today that they may shorten their group task time by getting into groups quickly and completing cooperative tasks according to the ten-minute schedule she has planned. Dr. Quast is using which of the following methods to get her students to cooperate? Negative reinforcement Social isolation Response cost Reprimands

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22. Calculate the perimeter and area of the following rectangle if $ { }^{*} $ Round your answers to the nearest ten thousandth, if necessary $ P= $ $ \square $ units \[ a \] square units

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Multiple Choice Question What effect do lower prices have on the standard of living of all Americans and their families? O They have no effect on their standard of living. O They raise their standard of living. O They lower their standard of living. O They raise their standard of living if it is low, and lower it if it is high.