If a bar + b bar = c bar and magnitude of a bar + magnitude of b bar = magnitude of c bar. then the angle between a bar and b bar is
a) 45°
b) 60°
c) 90°
d) 0°

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

Identify the type of heat transfer occurring when chocolate melts in your hand