The intensity of a sunspot is found to be 3 times smaller than the intensity emitted by the solar surface. What is the approximate temperature of this sunspot if the temperature of the solar surface is 5800 K?
a. 4400 K
b. 470,000 K
c. 1900 K
d. 7600 K
e. 1400 K
A
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If you pull on a box with a force of 5 N and your teacher pulls on the same box with a force of 5 N in the opposite direction, the net force on the box is
a. 10 N b. 50 N c. 5 N d. 0 N
How did Tycho's detailed observations of Mars' brightness help show that its orbit could not be circular?
What will be an ideal response?
The observed distribution of matter in the Universe is best understood as being caused by ____
a. clumping of dark matter in the early Universe causing clumping of normal matter b. clumping of normal matter in the early Universe causing clumping of dark matter c. simultaneous clumping of normal and dark matter d. large variations in the intensity of the cosmic microwave background e. homogenous expansion of normal and dark matter
A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest order maximum that will appear?
A) 8 B) 2 C) 6 D) 5 E) 5.3