Dark energy can exist in completely empty space.
Answer the following statement true (T) or false (F)
True
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Dark energy is the name of the
a. force that lead to the inflationary period of the Universe. b. five-dimensional space of the Universe. c. force suspected to cause the current acceleration in the rate of expansion of the Universe. d. one of the particles of dark matter related to WIMPs. e. the force that holds the proton together.
Spherical Mirrors: An object is placed 15 cm from a spherical concave mirror with a focal length of magnitude 20 cm. If the object is 4.0 cm tall, how tall is the image?
A. 1.0 cm B. 2.0 cm C. 8.0 cm D. 16 cm
How many degrees equivalent to 4 hours of right ascension?
A) 60° B) 15° C) 45° D) 30° E) 120°
X-rays, because they have more energy, travel through space faster than visible light
Indicate whether the statement is true or false