The current atmospheric concentration of carbon dioxide on Earth is at its highest in over a million years
Indicate whether the statement is true or false
TRUE
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The chemical abundance of population I stars
a. indicates that they were formed before the population II stars. b. indicates that the material they formed from had been enriched with material from supernovae. c. indicates that they contain very few heavy metals compared to halo stars. d. depends on the temperature of the star. e. depends on the mass of the star.
Jupiter is a failed star
Indicate whether the statement is true or false
The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x – (7.22 s-1)t]. What is the speed of the wave?
A) 0.450 m/s B) 1.41 m/s C) 2.22 m/s D) 3.16 m/s E) 23.5 m/s
A Ferris wheel with a radius of 8.00 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60.0-kg passenger when she is at the top of the wheel?
A) 589 N B) 568 N C) 615 N D) 325 N E) 432 N