In the Bohr model of the hydrogen atom both the energy and orbital angular momentum of the electron are quantized
a. True
b. False
Indicate whether the statement is true or false
True
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Uranus's large axis tilt causes it to
A) have extreme seasonal variations. B) be very hot. C) be very cold. D) have very short days and nights. E) keep one side facing the Sun at all times.
A 29.0-pm-wavelength photon is scattered by a stationary electron. What is the maximum energy loss the photon can have?
(melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 4.0 keV B) 6.1 keV C) 10 keV D) 12 keV E) 15 keV
Tasha has mass 20 kg and wants to use a 6.0-m board of mass 10 kg as a seesaw. Her friends are busy, so Tasha seesaws by herself by putting the support at the system's center of gravity when she sits on one end of the board. How far is she from the support point?
a. 2.0 m c. 0.67 m b. 1.0 m d. 0.33 m
The general theory of relativity depends on the fact that:
a. the mass m in Newton's law of gravitation always has the same value as the mass m in Newton's second law. b. inertial mass is measured by how objects respond to forces. c. gravitational mass is measured by comparing weights. d. gravitational mass is always greater than inertial mass. e. gravitational mass is always less than inertial mass.