A seed is 15 mm in front of a converging lens, and the image of the seed is 4.0 mm behind the lens. What is the focal length of the lens?
A) 11 mm
B) 5.5 mm
C) 3.8 mm
D) 3.2 mm
B
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An x vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the velocity of the ball is zero. We can be positive that at t = 5 s,
a. the slope of the curve is non-zero. b. the ball has stopped. c. the acceleration is constant. d. the curve is at x = 0, t = 0.
A website's search feature not only searches the website for the term, but also elsewhere on the web.
Answer the following statement true (T) or false (F)
If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth would
A) be the same. B) double. C) quadruple. D) be eight times as much as now. E) none of the above
Suppose you measure the parallax angle for a particular star to be 0.1 arcsecond. The distance to this star is
A) 10 light-years. B) 10 parsecs. C) 0.1 light-year. D) 0.1 parsec. E) impossible to determine.