Black hole jets are believed to be focused and confined by the enclosing magnetic _______________
Fill in the blank(s) with correct word
tubes
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The composition of the interstellar dust suggests that it is formed primarily in the atmospheres of cool stars
a. True b. False Indicate whether the statement is true or false
When two pieces of fissionable material are assembled, the average distance that a neutron travels before escaping will
A) decrease. B) increase. C) be the same.
An alpha particle (charge = +2e) is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the alpha particle when it is at a distance of 2 × 10^?14 m away from the gold nucleus? (e = 1.6 × 10^?19 C)
According to Einstein's theory, the energy of a photon is
a. proportional to its wavelength. b. proportional to its frequency. c. constant, since the speed of light is a constant. d. quantized, since it always appears in bundles of size, 1.6 × 10^?19 C. e. proportional to the square of the frequency.