Compare how doubling the diameter of a mirror will affect both resolution and light gathering power
What will be an ideal response?
The resolution would now be twice as sharp, but the increase in surface area, with the squaring for the area, would now detect stars four times fainter than before.
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Studies by the Global Oscillations Network Group, along with satellite observations, indicate
A) that the standard solar model requires substantial modification. B) that all stars show the same kind of vibrations that our Sun does. C) that there is an unknown energy transport mechanism in the Sun. D) that there is less convection in the Sun than predicted by the standard solar model. E) that the standard solar model accurately models the observed solar vibrations.
A fully charged capacitor (37. ?F) is discharged through a resistor (1000. ohms). If the voltage reduced to 7.6 volts after just 20. ms, what was the original potential on the capacitor?
A) 16. volts B) 9.0 volts C) 8.0 volts D) 13. volts E) 11. volts
With the x axis horizontal and the y axis vertically upward, the change in the horizontal component of velocity, ?vx, and the change in the vertical component of velocity, ?vy, of a projectile are related to the time since leaving the barrel, ?t, as
A. ?vx = 0; ?vy = 0. B. ?vx = g?t; ?vy = 0. C. ?vx = 0; ?vy = g?t. D. ?vx = 0; ?vy = ?g?t. E. ?vx = g?t; ?vy = ?g?t.
Your vocal cords are used to produce all the sounds you make while speaking
a. True b. False Indicate whether the statement is true or false