The figure below shows the unusual path of a confused football player. After receiving a kickoff at his own goal, he runs downfield to within inches of a touchdown, then reverses direction and races back until he’s tackled at the exact location where he first caught the ball. During this run, which took 25 s, what is his average velocity in the x-direction?
1.100 yd
2.200 yd
3.0.00 yd
4.It is more than 100 yd, but you must know the exact path to say exactly.
3
Physics & Space Science
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Which of the following is a unit of energy?
a. kilowatt-hour b. newton c. joules per second d. newton-second e. none of these
Physics & Space Science
The half-life of a muon is 2.2 ?s. How fast is it moving relative to an observer who says its half-life is 4.4 ?s?
A. 0.87c B. 0.75c C. 0.97c D. 0.72c E. 0.50c
Physics & Space Science
If a refrigerator door is left open while the refrigerator is on, the temperature of a house will ________ (increase, decrease, not change).
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
In the process of crystallization, the remaining magma becomes _______.
What will be an ideal response?
Physics & Space Science