A 600-kg car is going around a banked curve with a radius of 110 m at a speed of 24.5 m/s. What is the appropriate banking angle so that the car stays on its path without the assistance of friction?
A) 60.9° B) 29.1° C) 33.8° D) 56.2° E) 13.5°
B
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Density is
A) proportional to both mass and volume. B) proportional to mass and inversely proportional to volume. C) inversely proportional to mass and proportional to volume. D) inversely proportional to both mass and volume. E) proportional only to volume.
Because of refraction a fish in the water appears
A) nearer the surface. B) deeper in the water. C) at its actual depth.
The theory that Mercury shrank slightly when it was young has been proposed to explain
a. extended lava plains. b. large craters. c. magnetic field. d. lobate scarps. e. regolith.
A concave mirror has a focal length of 20 cm. What is the magnification if the object and image distances are 10 cm and -20 cm respectively?
a. 1 b. 2 c. 1/2 d. 1/4 e. -1/2