A surveyor is using a magnetic compass 5.4 m below a power line in which there is a steady current of 110 A. Compared to a typical value for Earth's magnetic field of 20 μT, the magnetic field due to the power line is significant and would interfere with the compass reading. What is the magnetic field at the site of the compass due to the power line?

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

Determine the maximum r-value of the polar equation r =3+3 cos 0

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?