sted below are the names, spectral types (in parentheses), and approximate masses of several nearby main-sequence stars. Rank th
e stars based on the distances to their habitable zones (from the central star), from shortest to longest.
1 answer:
Answer:
<em>From shortest distance to longest distance:</em>
<em>Barnard's Star (M4) </em>
<em>61 Cygnia A (K5) </em>
<em>Alpha Centauri A (G2) </em>
<em>Sirius (A1) </em>
<em>Spica (B1)</em>
Explanation:
A <em>habitable zone</em> is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure. In the image, the green zone is the habitable zone, that is why <em>Barnard's Star (M4)</em> is first in the list and <em>Spica (B1)</em> is last in the list.
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Answer:
T = 0.017s
Explanation:
period is the time it takes a particle to make one oscillation
An electric current is periodic in nature
The current reaches 3.8A ten times.
So there must have been 10 cycles (10 periods) in 0.17s. let 'T' be the period:
t is the total time interval
n is the number of oscillations
10T = 0.17
T = 0.17/10 = 0.017s