Suppose a straight 1.60mm -diameter copper wire could just "float" horizontally in air because of the force due to the earth's magnetic field b⃗ , which is horizontal, perpendicular to the wire, and of magnitude 4.2×10−5t .
what current would the wire carry?

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

The particles that are found in the nucleus of an atom are

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system