Astronomers detect _______________ of ionized gas moving perpendicular to the plane of many accretion disks
Fill in the blank(s) with correct word
jets
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The speed of waves in stretched string depends on which of the following?
A. the tension in the string B. the amplitude of the waves C. the wavelength of the waves D. the frequency of the waves
Which of the following best describes the meaning of declination and right ascension?
A) They are coordinates on the celestial sphere, with declination telling us the angular distance of an object from the celestial equator and right ascension telling us how far around the celestial sphere an object is located from the March equinox. B) They are coordinates on the celestial sphere that are similar to the coordinates of altitude and direction on Earth. C) They are used to describe the locations and distances of stars that we see in the night sky. D) They are terms used by astronomers to describe how the sky changes with the seasons.
Air is denser than water, which has implications for underwater divers
What will be an ideal response?
The figure shows a cross section of three parallel wires each carrying a current of 5.0 A out of the paper. If the distance R = 6.0 mm, what is the magnitude of the magnetic force on a 2.0-m length of any one of the wires?
A. 2.5 mN B. 3.3 mN C. 2.2 mN D. 2.9 mN E. 1.7 mN