At a certain location the earth's magnetic field is 0.00004t at an angle 40 degrees to vertical, a vertical wire carries a certain current of 15a. find the force on 20m of the wire

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

Ain is , is 's of ? 0.62 0.79 1.27 1.50

The ph is the a. independent variable b. the dependent variable c. control group