What is the role of the air spaces in insulating materials? Select all that apply.

They trap heat in the spaces.
Allow electrons to move around more freely
They puts gaps between the particles to slow down conduction.
They dissipate energy faster.
The make the material thicker so energy has to travel a further distance.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

What are atoms of the same element with varying number of neutrons

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above