A high-voltage transmission line of diameter 2 cm and length 150 km carries a steady current of 1 000 A. If the conductor is copper with a free charge density of 8 × 10^28 electrons/m3, how long does it take one electron to travel the full length of the cable? (e = 1.6 × 10^?19 C)

a. 6.0 × 10^2 s
b. 6.0 × 10^4 s
c. 6.0 × 10^6 s
d. 6.0 × 10^8 s
e. 6.0 × 10^–10 s


d

Physics & Space Science

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Indicate whether the statement is true or false

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A 0.30-kg mass is suspended on a spring. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance of 1.0 cm down and released from rest. Write down its equation of motion

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Physics & Space Science

The 500-m-long spaceship Springbrake is at rest on the planet Hitest for refueling. Another spaceship, Summerbrake, passes parallel to Springbrake at 0.600c. The crew on Springbrake measure the length of Summerbrake as it passes and find that the length they measure is exactly the same as the known 500-m rest length of Springbrake. If Summerbrake were at rest next to Springbrake, its length would then be measured to be

A. 180 m. B. 320 m. C. 500 m. D. 625 m. E. 781 m.

Physics & Space Science

The planets never travel in a straight line as they orbit the Sun. According to Newton's second law of motion, this must mean that ________

A) the planets are always accelerating B) a force is acting on the planets C) the planets will eventually fall into the Sun D) the planets have angular momentum

Physics & Space Science