Along, straight wire with 5 a current flowing through it produces magnetic field strength 2 t at its surface. if the wire has a radius r, where within the wire is the field strength equal to 51 % of the field strength at the surface of the wire? assume that the current density is uniform throughout the wire. (μ 0 = 4π × 10-7 t · m/a)

Asher cycles 12 miles in 16 hours. what is his speed?

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )