Suppose an elliptical galaxy is so far away that we cannot see even its brightest stars individually. Which of the following techniques might allow us to measure its distance?
A) using a white dwarf supernova as a standard candle
B) parallax
C) using Cepheid variables as standard candles
D) radar ranging
A) using a white dwarf supernova as a standard candle
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A white dwarf converts __________________ energy into _________________ energy
a. nuclear, gravitational b. chemical, potential c. kinetic, potential d. gravitational, thermal
Death Valley in California receives many German tourists. When you convert a summer temperature reading of 130° F to the Celsius scale they use at home, you find that the Celsius temperature is about
a. 26° C. b. 54° C. c. 72° C. d. 176° C e. 327° C.
This figure shows idealized thermal radiation spectra from several stars and a human. Based on this graph, at about what wavelength does a 15,000 K star emit its most intense light?
A) about 100 nanometers B) about 1,000 nanometers C) about 20 nanometers D) about 100,000 nanometers
If the mass of a body were doubled, its gravity would become 4 times stronger
Indicate whether the statement is true or false