Venus' lack of magnetic field means that:
A) there is no lightning on Venus.
B) the surface of Venus has no protection from the Sun's radiation.
C) it doesn't have a liquid metallic core.
D) Venus' upper atmosphere is permanently ionized.
E) there are constant aurorae everywhere on Venus.
D
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Vision Problems: What is the power of the lens that has a focal length of 40 cm and a diameter if 5.0 cm?
A. -2.5 diopters B. +20 diopters C. +0.20 diopters D. +2.5 diopters E. +2.7 diopters
The redshift of galaxies in the Universe is correctly interpreted as:
A: A Doppler shift due to the motions of galaxies through space. B: An "aging" of the light. C: Space itself expanding with time; the photon wavelengths are stretched as they they travel through space. D: The difference in temperature of distant and nearby galaxies. E: Extinction due to the effects of dust in galaxies.
Air is pumped into a bicycle tire at constant temperature. The pressure increases because:
A. more molecules strike the tire wall per second B. the molecules are larger C. the molecules are farther apart D. each molecule is moving faster E. each molecule has more kinetic energy
The solar constant refers to that fact that the Sun's luminosity has remained unchanged in the age of the solar system
Indicate whether the statement is true or false