The small circles in the diagram below represent the positions along the x axis of a body at equal time intervals. Assume the body moves in a straight line.
This diagram is most likely to describe
A. a swimmer swimming laps.
B. an exercise on a rowing machine.
C. a person on a treadmill.
D. a tennis ball during a volley.
E. a runner who tripped, fell, rose, and continued racing.
Answer: E
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Granulation is caused by:
A) shock waves in the corona. B) rising and falling currents of gas in and just below the photosphere. C) the solar wind flowing away from the corona. D) the temperature variability in the chromosphere, which causes sudden heating.
Two coherent sound waves will destructively interfere when the path difference is the wavelength times what?
A) half an even integer B) an integer C) half an odd integer D) an odd integer
Science can say nothing about the validity of nonscientific practices that do not make testable predictions
Indicate whether the statement is true or false
An electron is accelerated through a potential difference of 25000 V. What is the de Broglie wavelength of the electron (in m)?
a. 5.9 × 10^?12 b. 6.8 × 10^?12 c. 6.5 × 10^?12 d. 7.8 × 10^?12 e. 5.5 × 10^?12