A person tries to heat up her bath water by adding 5.0 L of water at 80°C to 60 L of water at 30°C. What is the final temperature of the water?
What will be an ideal response?
34.° C
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Why is the ozone layer in Earth's atmosphere important to life on its surface?
What will be an ideal response?
Spectral Series: What is the shortest wavelength in the Balmer series?
A. 328 nm B. 365 nm C. 456 nm D. 656 nm E. 820 nm
When a light ray travels between any two points, the path it takes is the one that (Hint: Eliminate answers you know are wrong.)
A. covers the greatest distance. B. follows the greatest index of refraction. C. avoids travel in more than one medium. D. is the mean between the longest and the shortest paths. E. takes the least time.
A stretched string is observed to vibrate in three equal segments when driven by a 480-Hz oscillator. What is the fundamental frequency of vibration for this string?
A. 480 Hz B. 320 Hz C. 160 Hz D. 640 Hz E. 240 Hz