A car is traveling along a freeway at 65 mph. What is the linear speed, relative to the highway, of each of the following points on one of its tires?
(a) the highest point on the tire
(b) the lowest point on a tire
(c) the center of the tire
What will be an ideal response?
(a) 130 mph (b) 0 mps (c) 65 mph
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Index of Refraction: Light having a speed in vacuum of 3.0 × 108 m/s enters a liquid of refractive index 2.0. In this liquid, its speed will be
A. 6.0 × 108 m/s. B. 3.0 × 108 m/s. C. 1.5 × 108 m/s. D. 0.75 × 108 m/s. E. 0.67 × 108 m/s.
Fluid Flow: Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the water pressure greatest?
A. at point A B. at point B C. It is the same at both A and B.
A 300-g glass thermometer initially at 25°C is put into 200 cm3 of hot water at 95°C. Find the final temperature (in °C) of the thermometer, assuming no heat flows to the surroundings. (The specific heat of glass is 0.2 cal/g/°C.)
a. 52 b. 68 c. 89 d. 79 e. 36
Two converging lenses, the first with focal length 25 cm and the second with focal length 20 cm, are separated by 30 cm. A 4.0 cm tall object is placed 50 cm in front of the first lens. What is the height of the final image?
A. 4.0 cm B. 2.0 cm C. 8.0 cm D. 9.3 cm E. 1.0 cm