If successive generations of stars return material back to the interstellar medium which is enriched in heavier elements, then we expect that old stars are ________ compared to younger stars
Fill in the blank(s) with correct word
poorer in metals
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Constant Acceleration Kinematics: A car is traveling with a constant speed when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration of magnitude 3.50 m/s2. If the car comes to a stop in a distance of 30.0 m, what was the car's original speed?
A. 10.2 m/s B. 14.5 m/s C. 105 m/s D. 210 m/s E. 315 m/s
Suppose the star Sirius were moved to a distance 7 times closer to Earth than it is now. How would its parallax angle change?
A) It would stay the same. B) It would get smaller. C) It would get larger.
A gas is confined to a cylindrical container of radius 1 cm and length 1 m. The pressure exerted on an end face, compared with the pressure exerted on the long curved face, is:
A. smaller because its area is smaller B. smaller because most molecules cannot traverse the length of the cylinder without undergoing collisions C. larger because the face is flat D. larger because the molecules have a greater distance in which to accelerate before they strike the face E. none of these
At the end of the Ordovician, many shallow-marine organisms went extinct due to
A) deep water predators. B) a long duration of high sea level. C) cooling temperatures, increased glaciation, and decreased sea level. D) cooling temperatures, increased glaciation, and a rise in sea level.