A wave moves in a rope with a certain wavelength. A second wave is made to move in the same rope with twice the wavelength of the first wave. The frequency of the second wave is _________ times the frequency of the first wave
Fill in the blank(s) with correct word
1/2
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Which of the following statements is true of the dynamo effect?
A) It is related to the degeneration of the Sun's magnetic field at the bottom of the convection zone deep under the photosphere. B) It is believed to trap ionized gases in a magnetic arch that rises up through the photosphere and enters the lower corona. C) It is believed to operate in the liquid metal of Earth's core to produce Earth's magnetic field. D) It is related to the creation of a Doppler shift toward shorter wavelengths caused by a velocity of approach.
Matter Waves: Calculate the kinetic energy, in electron-volts, of a neutron that has a de Broglie wavelength of 7.2 × 10-12 m (mneutron = 1.675 × 10-27 kg, 1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J ? s)
Fill in the blank(s) with the appropriate word(s).
Given that a vector extends from the origin to (-5.0 cm, 8.0 cm), find the direction of the vector from the positive x-axis.
A. 32
B. 58
C. 148
D. 122
A diatomic quantum mechanical oscillator has a moment of inertia of 7.73 × 10-45 kg ? m2
What is the rotational energy when it is in the quantum state characterized by L = 2? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 8.71 × 10-5 eV B) 2.27 × 10-5 eV C) 2.70 × 10-5 eV D) 7.22 × 10-5 eV