When two electric charges, q
1
q
1
​
q, start subscript, 1, end subscript and
q
2
q
2
​
q, start subscript, 2, end subscript are held a distance apart, the electrostatic force between them is
F
E
F
E
​
F, start subscript, E, end subscript. The charge of
q
1
q
1
​
q, start subscript, 1, end subscript is then doubled.

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely