Find the conductivity of a condult with a cross sectional area of .50cm^2 and a length of 15cm if it’s conductance G is .050ohm^-1

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Avoltaic cell converts chemical energy to

Photons with the highest energy have the longest period