What is the symbol for the element whose atoms have 92 protons each?
a. Nb
b. U
c. Zn
d. None of these
b
Physics & Space Science
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All radio telescopes are refracting telescopes
Indicate whether the statement is true or false
Physics & Space Science
If air speed is greater along the top surface of a bird's wings, pressure of the moving air there is
A) unaffected. B) less. C) more. D) turbulent.
Physics & Space Science
What evidence from the careful examination of impact craters provides evidence that Mars had surface water long ago?
A) indistinct rims of many large craters due to water erosion B) lack of small craters which would have been erased by ancient rainfall C) channels where water once flowed between crater lakes D) all of these
Physics & Space Science
Unlike our Moon and Mars, all the impact craters found on Venus are ________ in size
Fill in the blank(s) with correct word
Physics & Space Science