What is the arc length subtended by an angle of 30° on a circle of radius 10 cm?
What will be an ideal response?
5.2 cm
You might also like to view...
RLC Circuits: A 120-V rms signal at 60.0 Hz is applied across a series combination of a 30.0-mH inductor and a 100-? resistor. What is the rms value of the voltage across the inductor?
A. 0.700 V B. 119 V C. 100 V D. 13.5 V E. 120 V
Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye marked on the floor a horizontal distance away
Compared to the time for the ball to simply drop vertically from the bench, the time in the air for Dr. Chuck's projected ball is A) less. B) the same. C) greater.
Which statement illustrates the fact that two different theories can both agree with the same set of observations?
A) Nonsense--it is impossible for two different theories to both be correct. B) the theories of Ptolemy and Copernicus, before Tycho made his observations C) the theories of Copernicus and Kepler, after Tycho made his observations D) the theories of Galileo and Kepler E) the Earth-centered circular orbit theory of the early Greeks, and the later theory of Ptolemy
A ball is released moving straight up at 15. m/s. At some time later it is falling downward at 15. m/s. What was the magnitude of its average velocity over this time period?
A) 0. m/s B) 30. m/s C) 15. m/s D) 7.5 m/s E) 22. m/s