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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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.
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
Which of the following radionuclides is used to date once-living material?
a. Rubidium-87 b. Potassium-40 c. Thorium-232 d. Carbon-14
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?