In a 400-m relay race the anchorman (the person who runs the last 100 m) for the Trojans can run 100 m in 9.8 s. His rival, the anchorman for the Bruins, can cover 100 m in 10.1 s
What is the largest lead the Bruin runner can have when the Trojan runner starts the final leg of the race, in order for the Trojan runner not to lose the race?
3. m
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A 2.3 cm tall statue is 15. cm in front of a convex mirror. The mirror radius of curvature is 18. cm. (a) Is the image real or virtual? (b) How far is the image from the mirror? (c) Is the image upright or inverted? (d) How high is the image?
What will be an ideal response?
Helium-neon laser light (? = 6.33 × 10^?7 m) is sent through a 0.30 mm-wide single slit. What is the width of the central maximum on a screen 1.0 m from the slit?
a. 2.0 cm b. 4.2 mm c. 1.1 cm d. 2.0 mm e. 0.70 mm
If the calorimeter is not well insulated, how will heat from the air in the laboratory affect the experimental value for the latent heat of fusion of ice? Explain
Blue light differs from red light in that
a. blue light has a higher energy than red light. b. blue light has a lower energy than red light. c. blue light has a shorter wavelength than red light. d. blue light has a longer wavelength than red light. e. More than one of the other choices are correct.