During the 3.9 min a 6.9 A current is set up in a wire, how many (a) coulombs and (b) electrons pass through any cross section of the wire's width

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?