A capacitor in a single-loop RC circuit is charged to 85% of its final potential difference in 2.4 s. What is the time constant for this circuit?

a.
1.5 s

b.
1.3 s

c.
1.7 s

d.
1.9 s

e.
2.9 s


b

Physics & Space Science

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An astronomical unit (AU) is the average distance from the Earth to the Sun. An comet in orbit around the Sun has a perihelion (near point to the Sun) of 0.50 AU and an aphelion (far point from the Sun) of 5.0 AU. If the comet's orbital speed at aphelion is v, what is its speed at perihelion?

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The Dirac theory predicted that a positron would be

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When the equation Ga + Br2 ? GaBr3 is balanced, the total of all the coefficients (both written and "understood") is

a. 4. b. 3. c. 6. d. 7.

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