Scientific theories can never be proved true beyond all doubt
Indicate whether the statement is true or false
TRUE
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An ideal polarizer is placed in a beam of unpolarized light and the intensity of the transmitted light is 1. A second ideal polarizer is placed in the beam with its preferred direction rotated 40° to that of the first polarizer
What is the intensity of the beam after it has passed through both polarizers? A) 0.77 B) 0.64 C) 0.59 D) 0.41 E) 0.30
Conservation of Momentum: Two ice skaters suddenly push off against one another starting from a stationary position. The 45-kg skater acquires a speed of 0.375 m/s relative to the ice. What speed does the 60-kg skater acquire relative to the ice?
A. 0.50 m/s B. 0.28 m/s C. 0.38 m/s D. 0.75 m/s E. 0.00 m/s
What is an ionization nebula?
A) a region of hot, low-density gas surrounding a recent supernova B) a clump of gas that will soon give birth to a new star C) a colorful cloud of gas that glows because it is heated by light from nearby hot stars D) a name sometimes used to describe spiral galaxies besides the Milky Way
Current technology is in the process of developing electronic circuit elements with distances between elements of only
A. nanometers. B. millimeters. C. microns. D. picometers.