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

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

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