Wien's Law: The cosmic background radiation permeating the universe has the spectrum of a 2.7-K blackbody radiator. What is the peak wavelength of this radiation? The constant in Wien's law is 0.0029 m ? K.
What will be an ideal response?
1.1 mm (microwave region)
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Jupiter's atmosphere looks uniform and calm, with no visible detail
Indicate whether the statement is true or false
The direction of the force on an electric charge in a magnetic field is
a. in the direction of the magnetic field b. in the direction of motion of the charge c. perpendicular to the magnetic field d. perpendicular to the direction of motion of the charge e. none of the above
The radial velocity curve of a star with an extrasolar planet is a plot of
A) radial velocity against luminosity B) radial velocity against brightness C) radial velocity against distance D) radial velocity against time
If F = 40 N and M = 2.0 kg, what is the magnitude of the acceleration of the suspended object? All surfaces are frictionless
a.
1.2 m/s2
b.
2.0 m/s2
c.
1.5 m/s2
d.
2.5 m/s2
e.
5.6 m/s2