Which of the following statements is most true regarding the accuracy of scientific measurement devices? 1. two identical rulers will always yield the same measurement. 2. the accuracy of an ideal balance is not affected by external forces. 3. because it is sealed, a gps unit is not affected by electro-magnetic variation, 4. changes in moisture and temperature can warp a measurement device.

In the six-step process of preparing a speech, what should you do after you gather the information you need ? a) practice your speech b) limit your subject c) determine the purpose for your speech d) outline your speech

According to stephen hawking in the "origin of the universe" lecture, "why are we here" and "where did we come from" are questions that

Read this description of a detail from the movie i am legend. a scientist is the last man alive in a post-apocalyptic new york, where zombies have taken over and destroyed most of the population. about ten minutes into the film, the man thinks back to how the zombie creatures came to be, and how at one point he had a wife and child. which type of suspense technique did the screenwriter use? dramatic irony flashback foreshadowing special effects