The summer solstice is east of the vernal equinox by 6 hours of right ascension
Indicate whether the statement is true or false
TRUE
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A ruby laser beam (? = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the Moon, 384,000 km away. What is the radius of the big red spot on the Moon?
a. 500 m b. 250 m c. 120 m d. 1.0 km e. 2.7 km
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.
Under what circumstances is population growth "sustainable"? Discuss what sustainable means and attempt to apply your definition to Earth's human population
What will be an ideal response?
Which of the following radionuclides is used to date once-living material?
a. Rubidium-87 b. Potassium-40 c. Thorium-232 d. Carbon-14