The current in a wire varies with time according to the equation I(t) = 6.00 A + (4.80 A/s)t, where t is in seconds. How many coulombs of charge pass a cross section of the wire in the time period between t = 0.00 s and t = 3.00 s?

What will be an ideal response?


39.6 C

Physics & Space Science

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Potential Energy: A small 4.0-µC charge and a small 1.5-µC charge are initially very far apart. How much work does it take to bring them to a final configuration in which the 4.0-µC charge is at the point x = 1.0 mm, y = 1.0 mm, and the 1.5-µC charge is at the point x = 1.0 mm, y = 3.0 mm? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)

A. 27 J B. 13.5 kJ C. 54 J D. 13.5 J

Physics & Space Science

Which has the greater density?

A) a cup-full of fresh water B) a lake-full of fresh water C) both the same D) need more information

Physics & Space Science

When a gas undergoes an isothermal process, there is

A) no work done by (or on) the gas. B) no heat added to the gas. C) no change in the volume of the gas. D) no change in the temperature of the gas. E) no change in the pressure of the gas.

Physics & Space Science

The banking angle in a turn on the Olympic bobsled track is not constant, but increases upward from the horizontal. Coming around a turn, the bobsled team will intentionally "climb the wall," then go lower coming out of the turn

Why do they do this? A) to reduce the g-force on them B) to increase the g-force on them C) to prevent the bobsled from turning over D) to take the turn at a faster speed E) to give the team better control, because they are able to see ahead of the turn

Physics & Space Science