1. The amount of energy needed to change a substance from the solid phase to the liquid phase is the substance's A. O heat of transformation
B. O heat of fusion
C. O melting point
D. O heat of vaporization

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2