A race car, traveling at a constant speed of 50. m/s, drives around a circular track of radius 250. m. What magnitude acceleration does it experience?
A) 1.0 m/s2
B) zero
C) 10. m/s2
D) 0.63 km/s2
E) 2.2 m/s2
C
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A light beam having a wavelength of 470 nm in air is directed into glycerine at an angle of 75.0° with the normal in air. Glycerine has a refractive index of 1.47. (c = 3.0 × 108 m/s)
(a) What are the frequency and wavelength of the light in the glycerine? (b) What angle does the light beam make with the normal in the glycerine?
Size of the Nucleus: The radius R of a nucleus of mass number A is given by R = R0 A1/3, where R0 = 1.2 × 10-15 m, calculate the density of a nucleus that has contains 57 protons and 82 neutrons. The mass of a nucleon (proton or neutron) is 1.67 × 10-27 kg.
Fill in the blank(s) with the appropriate word(s).
Your vision is sharpest when your pupil is
A) dilated. B) constricted. C) same either way
Planet Roton has a mass of 4.0 × 10^23 kg and a radius of 2.0 × 10^6 m. With what speed should a space probe be launched from the surface of Roton so as to achieve a maximum distance of 3.0 × 10^6 m from the center of Roton?
a. 4.2 km/s b. 3.9 km/s c. 3.0 km/s d. 3.4 km/s e. 6.0 km/s