A thin copper rod 1.00 m long has a mass of 50.0 g. What is the minimum current in the rod that would allow it to levitate above the ground in a magnetic field of magnitude 0.100 T?

1.1.20 A
2.2.40 A
3.4.90 A
4.9.80 A
5.none of those answers


3

Physics & Space Science

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A string that is 0.15 m long and fixed at both ends is vibrating in its n = 5 harmonic. The sound from this string excites a pipe that is long and open at both ends into its second overtone resonance

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The bob of a conical pendulum swings in a

A) to-and-fro path. B) circular path. C) chaotic path.

Physics & Space Science

Exhibit 11-1 Two birds of prey hurtling after the same mouse collide in mid-air and grab each other with their talons. Each 250-g bird is flying at 30 m/s at a 60° angle to the ground. ? ? Use this exhibit to answer the following question(s). Refer to Exhibit 11-1. What is the magnitude of their velocity, in m/s, immediately after the collision?

A. 0 B. 13 C. 15 D. 26 E. 30

Physics & Space Science