The softest mineral on the Mohs hardness scale is named ______________
Fill in the blank(s) with correct word
talc
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Current searches for extraterrestrial intelligence use radio telescopes at wavelengths
a. which must be shorter than the local wavelengths emitted by Earth's atmosphere b. which must be longer than the radio wavelength "noise" naturally emitted by our galaxy c. Both conditions "a" and "b" above must be fulfilled. d. Wrong! Visual light wavelengths are used because they are blocked by dust between the stars.
Because they all involve formation of iron in the cores of massive stars, all Type II supernovae are approximately equally luminous
Indicate whether the statement is true or false
State how to draw the three rays for finding the image position due to a thin lens
What will be an ideal response?
Which of the following web video formats was originally designed for Apple systems?
A. .avi B. .mov C. .mpeg D. .wmv