Asample is in the second half-life. what percent of the sample is stable at this point?

12.5%
25%
50%
75%

Which object is most likely represented by a dot?

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?

Will give brainpower answer if answered all correctly!