Velocity: What must be your average speed in order to travel 350 km in 5.15 h?
A. 66.0 km/h
B. 67.0 km/h
C. 68.0 km/h
D. 69.0 km/h
Answer: C
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The following conversion equivalents are given:
1.0 mile = 5280 ft 1.0 ft = 12 in 1 m = 39.37 in 1.0 hour = 60 min 1.0 min = 60 s If a deer runs at 4.7 mi/h, its speed, in meters per second, is closest to A) 2.1 m/s. B) 1.7 m/s. C) 1.9 m/s. D) 2.3 m/s. E) 2.5 m/s.
Refracting Telescope: The focal length of the objective lens of a telescope is 75.0 cm, and the eyepiece has a focal length of 6.00 cm. What is the magnification of this telescope?
A. 0.0800 B. 0.645 C. 450 D. 12.5 E. 200
Ilona and Olivia observe a virtual image formed by an object placed a distance in front of a convex lens of focal length f. They argue about where to place a concave lens of focal length ?f to have a virtual image at the same location relative to the lens that they had with the convex lens. Ilona says that the object should also be placed a distance
/> in front of the concave lens. Olivia says that this won't work. Which one, if either, is correct, and why? A.
B.
C.
D.
E.
An ideal spring stretches by 21.0 cm when a 135-N object is hung from it. If instead you hang a fish from this spring, what is the weight of a fish that would stretch the spring by
A) 199 N B) 91 N C) 145 N D) 279 N