What direct evidence do we have that the weak and electromagnetic forces were once unified as a single force?
A) Particle accelerators on Earth can reach energies equivalent to the high temperatures of the Electroweak era and have produced particles predicted by the unified theory.
B) Detectors on Earth have received photons and high-energy particles from the GUT era.
C) The most advanced telescopes are able to see back to the GUT era in the universe.
D) Temperatures in the center of the Sun can reproduce the conditions during the Electroweak era.
E) We have no direct evidence of such a unified force.
A
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Due to the high temperatures of the gas, what color do prominences appear as during a solar eclipse?
a. copper b. blue c. pink d. violet e. teal
Which is a characteristic Venus shares with Earth? a. Both planets have an ozone layer within their atmospheres
b. Both planets rotate clockwise on their axes. c. Both planets have a uniform circulation within their atmospheres. d. Both planets are still geologically active. e. Both planets have heavily cratered surfaces.
When taking a photo of a nearby flower, your camera lens should be set
A) closer than one focal length from the photosensitive surface. B) farther than one focal length from the photosensitive surface. C) to one focal length from the photosensitive surface.
Suppose you have two negative point charges. As you move them farther and farther apart, the potential energy of this system relative to infinity
A) increases. B) decreases. C) stays the same.