What is not used in determining a distance from spectroscopic parallax?
A: apparent brightness
B: temperature from spectrum
C: H-R Diagram
D: inverse square law
E: none of the above- they're all used!
Ans: E: none of the above- they're all used!
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The left-hand end of a glass rod is ground to a spherical surface. The glass has index of refraction 1.50. A small object 4.00 mm tall is placed on the axis of the rod, 37.0 cm to the left of the vertex of the spherical surface
The image is formed in the rod, 50.0 cm to the right of the vertex. (a) What is the magnitude of the radius of curvature of the spherical surface at the end of the rod? (b) What is the height of the image?
If the bright star Sirius transits my local meridian tonight at 6:43 PM, when will it transit tomorrow?
What will be an ideal response?
A hypernova creates:
A) a black hole. B) a pulsar. C) a neutron star. D) short-duration gamma-ray bursts. E) Both B and C are correct.
A refrigerator is actually a ________ (two words) running in reverse.
Fill in the blank(s) with the appropriate word(s).