Avery long wire has a radius of r 10 mm and a constant current of 5 amps. what is the energy density at r 6 meters away from the wire? if you needed a higher energy density for some reason, what things could you change? and where did that energy come from, anyway?

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

Determine the largest intensity w of the uniform loading that can be applied to the frame without causing either the average normal stress or the average shear stress at section b–b to exceed σ=19 mpa and τ=24 mpa, respectively.

Is the portion of the electromagnetic spectrum that has a frequency just above that of visible light.