Why should photons emitted by a hotter gas have, on average, shorter wavelengths than photons emitted by a cooler gas?
What will be an ideal response?
The wavelength of photons emitted by a gas depends on its temperature. The hotter the gas, the shorter the peak wavelength.
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Rotational Kinetic Energy: A pencil that is 15.7 cm long is released from a vertical position with the eraser end resting on a table. The eraser does not slip as it tips over. Treat the pencil like a uniform rod. What is the angular speed of the pencil just before it hits the table?
A. 13.7 rad/s B. 7.23 rad/s C. 3.70 rad/s D. 24.5 rad/s E. 16.8 rad/s
The largest impact features on the surface of the Moon are the ______________ basins
Fill in the blank(s) with correct word
The Big Bang theory seems to explain how elements were formed during the first few minutes after the Big Bang. Which hypothetical observation (these are not real observations) would call our current theory into question?
A) the discovery of a galaxy with a helium abundance of only 10% by mass B) the discovery of a star-like object made almost entirely of carbon and oxygen C) the discovery of a planet that with no helium in its atmosphere D) the discovery of a galaxy with 27% helium by mass
A light ray can pass through a diverging lens without being deflected
a. True b. False Indicate whether the statement is true or false