Which of the following statements about x-rays and radio waves is true?
A) X-rays have the same wavelengths as radio waves.
B) X-rays have the same frequency as radio waves.
C) X-rays have the same energy as radio waves.
D) X-rays travel through space at the same speed as radio waves.
D) X-rays travel through space at the same speed as radio waves.
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What is basalt?
A) any substance that evaporates easily and is a gas, liquid, or ice on Earth B) a type of rock that makes relatively low-viscosity lava C) a type of metal that tends to create stratovolcanoes when eruptions occur D) a type of mineral that is the main ingredient of sea salt E) another name for lava
What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 × 10-4 m2? (?0 = 4? × 10-7 T • m/
A) A) 4.19 nH B) 4.19 pH C) 4.19 µH D) 4.19 mH E) 4.19 H
The daily motion of celestial objects in the sky is caused by
A) the rotation of our planet about its axis. B) the revolution of our planet around the Sun. C) the movement of our planet within the Milky Way. D) the tilt of Earth's axis.
The _____ is a measure of the rate of expansion of the Universe
A) Hubble constant B) Stefan-Boltzmann constant C) Boltzmann constant D) Planck constant