Why did early civilizations observe constellations?
A) only for religious reasons
B) for practical reasons, such as navigation and helping to determine seasons
C) only for recreational reasons
D) only to predict a person's destiny
B
Physics & Space Science
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A watt is equal to
a. 746 horsepower. b. one calorie. c. one joule. d. 1 J/s. e. a unit of energy.
Physics & Space Science
A light-year is a unit of _____
A) time B) luminosity C) distance D) mass
Physics & Space Science
One star has a temperature of 10,000 K and another star has a temperature of 5,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?
a. 16 times b. 2 times c. 1 × 10^16 times d. 625 times e. 25 times
Physics & Space Science
Contrast a hypernova and a type II supernova
What will be an ideal response?
Physics & Space Science