An astronaut on the Moon has the same mass as when on Earth,but has a different ______________
Fill in the blank(s) with correct word
weight
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One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?
a. 5 times b. 25 times c. 8.1 × 10^17 times d. 625 times e. 1.3 × 10^15 times
The spectrum of the hydrogen atom differs from the spectrum of the helium atom due to
A) their different energy levels. B) the different frequencies of their emitted photons. C) Both of the above. D) Neither of the above.
Discuss why the new theory, called quantum mechanics, was so successful
What will be an ideal response?
A 1800 kg car moving at 20 m/s hits an initially uncompressed spring with a spring constant of 
The maximum compression of the spring is
A. 0.40 m. B. 0.60 m. C. 0.80 m. D. 1.0 m. E. 1.2 m.