The short lifetime of muons created in the upper atmosphere of the Earth would not allow them to reach the surface of the Earth unless their lifetime increased by time dilation. From the reference system of the muons, the muons can reach the surface of the Earth because:
a. time dilation increases their energy.
b. time dilation increases their velocity.
c. the relativistic speed of the Earth toward them is added to their velocity.
d. length contraction decreases the distance to the Earth.
D
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The Sun has a surface temperature of approximately 5800 K. At what wavelength does the maximum energy radiated by the Sun occur?
a. 5800 nm b. 300 nm c. 174 nm d. 500 nm e. 3000 nm
List at least three things that make Earth unique among the terrestrial planets.
Fill in the blank(s) with the appropriate word(s).
You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 1.8 × 107 m and its rotation period to be 22.3 hours
You have previously determined that the planet orbits 1.8 × 1011 m from its star with a period of 402 earth days. Once on the surface you find that the acceleration due to gravity is 59.7 m/s2. What are the mass of (a) the planet and (b) the star? (G = 6.67 × 10-11 N ? m2/kg2.) A) (a) 7.2 kg × kg, (b) 2.9 kg × kg B) (a) 1.3 kg × kg, (b) 2.9 kg × kg C) (a) 7.2 kg × kg, (b) 1.7 kg × kg D) (a) 1.3 kg × kg, (b) 1.7 kg × kg
Boiling is the process of evaporation
A) beneath the water surface. B) at its extreme. C) that cools instead of warms.