The helium flash increases the star's luminosity
Indicate whether the statement is true or false
FALSE
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The ability of a steel to be hardened to a specific depth is the _________.
Fill in the blank(s) with the appropriate word(s).
The constellation of Orion is currently visible in the evenings in January. Precession will not affect this and Orion will still be visible in January 13,000 years from now
Indicate whether the statement is true or false
Magnifying Glass With the Image at the Near Point of the Eye: The angular magnification of a magnifying glass is largest when the image is at
A. the far point of the eye. B. the focal point of the lens. C. the near point of the eye. D. infinity. E. The magnification depends on the magnifying glass lens, not where the person puts his eye.
Two charged particles 1 m apart exert a 1-N force on each other. If the particles are instead 0.25-m apart, the force on each particle will be
A) 1.0 N. B) 2.0 N. C) 4.0 N. D) 8.0 N. E) 16.0 N.