A marathon race is 26 mi and 385 yd long. Estimate how many strides would be required to run a marathon. Assume a reasonable value for the average number of feet/stride
A) 4.5 × 104 strides
B) 4.5 × 103 strides
C) 4.5 × 105 strides
D) 4.5 × 106 strides
A
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Lens-Maker Formula: The radius of curvature of the curved side of a plano-convex lens made of glass, having index of refraction 1.64, is 33 cm. What is the focal length of the lens?
A. 52 cm B. -52 cm C. 21 cm D. -21 cm
By comparing the two images, what can you conclude about Io's volcanoes?
A) Every black spot in the visible image has a bright spot in the infrared image, so all of Io's volcanoes were active when the photos were taken. B) There are more black spots in the visible image than bright spots in the infrared image, so many of Io's volcanoes were inactive when the photos were taken. C) There are more bright spots in the infrared image than black spots in the visible image, so new eruptions must have started after the visible photo was taken.
The activation enthalpy for vacancy diffusion along a grain boundary is _____________than that for diffusion through the bulk.
Fill in the blank(s) with the appropriate word(s).
A conservative force on a particle moving along the x axis is given by 
. Which of the following is a potential that is associated with this force?
A.
B.
C.
D.
E.