Q: What theory goes beyond classical mechanics to describe the behavior of near-light-speed objects? Read this paragraph and choose the correct option from the provided answers: A great many experiments have been performed to test the predictions of special relativity. No contradictions have been found. Scientists have therefore accepted special relativity as an accurate description of nature. When the relative velocities of objects are considerably less than the speed of light, the formulas for relativistic time, length, and mass all reduce to the classical formulas. It is required that the two theories correspond where they overlap at speeds much less than . Special relativity does not contradict classical mechanics. Rather, it is a more general theory needed for object speeds approaching the speed of light. Choices: - normal relativity - simple relativity - spacial relativity - special relativity A:
special relativity

Q: Changes of state of matter do not involve what type of reaction? Read this paragraph and choose the correct option from the provided answers: Not all changes in matter involve chemical reactions. For example, there are no chemical reactions involved in changes of state. When liquid water freezes or evaporates, it is still water. No bonds are broken and no new products are formed. Choices: - gaseous reaction - radiation - mechanical reaction - chemical reaction A:
chemical reaction

Q: All cells have voltages across their what? Read this paragraph and choose the correct option from the provided answers: Choices: - display membranes - ribosomes - nuclei - plasma membranes A:
plasma membranes

Q: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only do what? Read this paragraph and choose the correct option from the provided answers: Muscles can only contract. They can't actively lengthen. Therefore, to move bones back and forth at a joint, skeletal muscles must work in pairs. For example, the bicep and triceps muscles of the upper arm work as a pair. You can see how this pair of muscles works in Figure below . When the bicep muscle contracts, it bends the arm at the elbow. When the triceps muscle contracts, it straightens the arm. Choices: - vibrate - pull - expand - contract A:
contract