What conditions are necessary for a partial solar eclipse?
A) new moon on ecliptic, with us in the penumbral shadow
B) full moon on equator, with us in the umbral shadow
C) new moon at perigee
D) full moon at apogee
E) first or third quarter moon at a node
A
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Which of the following types of electromagnetic radiation has the lowest energy?
a. X-rays b. visible light c. ultraviolet d. gamma rays e. infrared radiation
When a gas undergoes an isothermal process, there is
A) no work done by (or on) the gas. B) no heat added to the gas. C) no change in the volume of the gas. D) no change in the temperature of the gas. E) no change in the pressure of the gas.
Rocks that formed from the cooling of molten material are classified as
a. discordant. b. metamorphic. c. sedimentary. d. igneous.
If a binary system has a period of 4 years and a separation of 5 AU, then the total mass is 7.8 solar masses
a. True b. False Indicate whether the statement is true or false