Why did the Big Bang not produce heavier elements?
A) They did, but radioactive decay caused these elements to disappear again.
B) Too many high energy photons were present during the era of nucleosynthesis for heavy elements to form.
C) By the time helium could survive, the temperature had become too low for heavier elements to form.
C
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Standing Waves on a String: A 4.0-g string is 0.36 m long and is under tension. The string vibrates at 500 Hz in its third harmonic. What is the wavelength of the standing wave in the string?
A. 0.24 m B. 0.36 m C. 0.54 m D. 0.72 m E. 0.90 m
A decibel is a measure of a sound's
A) frequency. B) wavelength. C) speed. D) loudness. E) all of the above
Most pulsars are known only as radio sources, but a few of the younger ones, like the Crab and Vela, also give off visible and even X-ray energy
Indicate whether the statement is true or false
Discuss how web designers create forms that follow UX principles.
What will be an ideal response?