The value of the dot product of two vectors depends on the particular coordinate system being used
A) True
B) False
B
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In what sense is all observable deuterium "primordial"? Why is its abundance so important in cosmology?
What will be an ideal response?
How can we measure the strength of magnetic fields on the Sun?
A) by looking for the splitting of spectral lines in the Sun's spectrum B) by observing the sizes of sunspots: Bigger sunspots mean a stronger field C) by observing auroras here on Earth D) only by using sophisticated computer models, because there are no observational ways of measuring magnetic field strength
If y = 0.02 sin (30x? 400t) (SI units), the frequency of the wave is
A. 30 Hz. B. 15/? Hz. C. 200/? Hz. D. 400 Hz. E. 800? Hz.
The wavelength of a particle relates to its
A) momentum. B) energy levels. C) quantum number. D) all of the above E) none of the above