USE THE PICTURE BELOW TO ANSWER THIS QUESTION: In an experiment, a thin sheet of material --A, B, or C -- was used to divide two objects with different temperatures. In each trial, the conditions were identical except for the material that the thin sheet was made of. The data table shows the times in which the objects reached thermal equilibrium. Which material, if any, is the best thermal insulator? (Please help me asap!)

Dry ice is solid carbon dioxide that is used in the transport of food and medicine. dry ice becomes a gas at –78.5°c without becoming a liquid first.

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.