A unique characteristic of type O stars is ionized helium lines in its spectrum
Indicate whether the statement is true or false
TRUE
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How can we be certain that white dwarfs are very small?
What will be an ideal response?
What is the potential difference between the ends of bulb A?
A. 1.5 V
B. 1.2 V
C. 0.5 V
D. 0.3 V
E. 0.15 V
F. Some other value (specify)
Jupiter is about 5 AU from the Sun. In a ten billion to one scale model, Jupiter is
A) about 15 meters from the Sun. B) about a kilometer from the Sun. C) about 75 meters from the Sun. D) less than one meter from the Sun.
Scattered light in the atmosphere is often partially polarized. The best way to determine whether or not light from a particular direction in the sky shows polarization is to
a. diffract the light through a single slit. b. squint while looking in that direction. c. rotate a piece of polaroid film about an axis parallel to the ray while looking through it in that sky direction. d. rotate a piece of polaroid film about an axis perpendicular to the ray while looking through it in that sky direction. e. reflect the rays from that direction on a shiny metal surface.