The resistivity of pure copper is 17 nano-Ohm-meters. How many times more resistive than copper is the nickel-chrome wire used in this experiment? (In other words, calculate the ratio of these resistivity values)

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

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.

70 give a real life example showing how sensory neurons work with the motor neurons