which of the following is a necessary trait of a good hypothesis?
a.
it includes a statement about the type of research to be used in testing the hypothesis.
b.
it is clear and testable.
c.
it is written in the form of a question.
d.
it includes a reference to the theory from which the hypothesis was derived.

Identify the type of synthetic material used in each object

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt