Spectroscopic parallax is more accurate than trigonometric parallax for nearby stars
Indicate whether the statement is true or false
FALSE
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For the 1045 steel shown in Figure 6.22, determine the elastic modulus, the upper yield point, and the lower yield point.
What will be an ideal response?
In order of visual luminosity at the start, which is most luminous?
A) a red supergiant B) a planetary nebula C) a nova D) a type I supernova E) a type II supernova
Why so much emphasis upon units? Why are units considered to be as important as the quantity, "magnitude", of something?
What will be an ideal response?
Note the expression: y = A/x2 . Which statement is most consistent with this expression?
a. y is less than A b. if x is doubled, y is multiplied by a factor of four c. if x is halved, y is multiplied by a factor of four d. y is greater than x