The energy needed to change the phase of a substance is called ______________
Fill in the blank(s) with correct word
latent heat
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Relative Velocity: A plane has an airspeed of 142 m/s. A 30.0 m/s wind is blowing southward at the same time as the plane is flying. What must be the heading of the plane in order to move directly eastward relative to the ground?
A. 78.1° north of east B. 11.9° north of east C. 77.8° north of east D. 12.2° north of east E. 55.3° north of east
If the Universe had ________, that would resolve Olbers' paradox.
A. sources of new matter, like white holes B. more mass than electromagnetic radiation C. more electromagnetic radiation than mass D. a finite age E. an infinite extent
Earth's average density is about _____
A) 5.5 g/cm3 B) 6.5 g/cm3 C) 7.5 g/cm3 D) 8.5 g/cm3
Which of the following was discovered by Galileo Galilei?
A) The mountains and valleys on the surface of the Moon B) The planets Uranus and Neptune C) The planets being in elliptical motion around the Sun D) The other galaxies in the Universe