The Bohr model of the atom states
A. electrons can have any orbit about the nucleus
B. electrons are contained in the nucleus
C. electrons are uniformly distributed throughout the atom
D. electrons can orbit the nucleus only in certain stable orbits
D. electrons can orbit the nucleus only in certain stable orbits
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The hole for a bolt in a brass plate has a diameter of 1.200 cm at 20°C. What is the diameter of the hole when the plate is heated to 220°C? The coefficient of linear thermal expansion for brass is 19 × 10-6/°C
(Express your answer to 4 significant figures.) A) 1.205 cm B) 1.125 cm C) 1.195 cm D) 1.200 cm E) 1.210 cm
A ray of light consisting of blue light (wavelength 480 nm) and red light (wavelength 670 nm) is incident on a thick piece of glass at 80°
What is the angular separation between the refracted red and refracted blue beams while they are in the glass? (The respective indices of refraction for the blue light and the red light are 1.4636 and 1.4561.) A) 0.27° B) 0.33° C) 0.36° D) 0.46° E) 0.54°
When the sum of the external forces and the sum of the external torques on a body are both zero, we can conclude that
a. the body is moving at constant velocity but is not rotating. b. the body is rotating at constant angular velocity but has no linear velocity. c. the body has neither linear nor angular velocity. d. the body may have constant linear or angular velocity, but not both simultaneously. e. the body may have constant linear or constant angular velocity, or both simultaneously.
Quasars are far enough away that we must take the relativistic redshift into account when calculating their age
Indicate whether the statement is true or false