Which of the following types of electromagnetic radiation has the highest frequency?
a. x-rays
b. visible light
c. radio
d. gamma-rays
e. infrared radiation
D
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Austenitic stainless steel has the _________-centered-cubic crystal structure at room temperature.
Fill in the blank(s) with the appropriate word(s).
The famous Leaning Tower of Pisa doesn't topple over because its center of gravity is
A) relatively low for such a tall building. B) stabilized by its structure. C) displaced from its center. D) above a place of support. E) in the same place as its center of mass.
How can you tell whether a sugar solution is saturated or not?
A) Add more sugar, if it dissolves, it is saturated. B) There will be a precipitate if the water is heated. C) Cool the solution to see if there is a precipitate. D) As long as there are more water molecules than sugar molecules, there is a saturated solution.
What evidence do we have that life arose fairly quickly on Earth?
What will be an ideal response?