Study this H-R diagram. Which of the following stars is the largest in size (radius)? (The red arrows help you locate these stars on the diagram.)
A) Antares
B) Canopus
C) Alpha Centauri B
D) Aldebaran
A) Antares
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A particle of charge q travels with velocity v in the same direction as the magnetic field, B. What is the force exerted on the charge?
1. qvB, in the direction of the magnetic field 2. qvB, in the direction opposite that of the magnetic field 3. qvB, in a direction perpendicular to the magnetic field and the velocity 4. zero
Which of the following molecules is not a straight-chain hydrocarbon?
A) a B) b C) c D) All of the above are straight-chain hydrocarbons. E) None of the above are straight-chain hydrocarbons.
Thin Films: A glass plate that is 2.5 cm long is separated from another glass plate at one end by a strand of someone's hair that is 0.010 mm in diameter. How far apart are the adjacent interference bands when viewed with light of wavelength 600 nm?
Fill in the blank(s) with the appropriate word(s).
The angular size of the Moon in the sky is about
a. 1/2 degree. b. 5 degrees. c. 10 degrees. d. 1.6 kilometers. e. 4000 kilometers (1/4 Earth's diameter).