The wavelengths of radiation from a star that is moving toward us
A) can be longer or shorter depending on the distance to the star
B) are shorter than if the star were not moving
C) are longer than if the star were not moving
D) are the same as if the star were not moving
B
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What is the angular separation of two spectral lines of wavelengths 497 nm and 251 nm formed in the third order with a diffracting grating having 587 lines per millimeter?
A) 34.8° B) 24.8° C) 41.3° D) 29.4° E) 4.21°
When an unstable Cd nucleus undergoes gamma decay, the nucleus formed is that of
a. Cadmium. b. Tin. c. Silver. d. Palladium. e. Indium.
In thermoset polymers, the cross-link and three-dimensional covalent bonds _________ creep.
Fill in the blank(s) with the appropriate word(s).
Dimensional Analysis: The period P of oscillation of a pendulum (the time interval needed to complete one full oscillation) can be expressed in terms of the mass m of the plumb bob, the length L of the string, and the acceleration due to gravity, g, as P =kmbLcgd, where k, b, c, and d are dimensionless constants. What must be the values of b, c, and d?
What will be an ideal response?