All the strategies discussed above can be applied equally to SAT II Physics and SAT II Modern Hebrew. That’s why they’re called “general hints.” However, as you may have noticed, there are a number of differences between the study of physics and the study of modern Hebrew. Because physics is unlike modern Hebrew, and even unlike math and chemistry, there are a number of strategies that apply uniquely to SAT II Physics. Some of these strategies will help you out in physics generally, while some are suited to the unique idiosyncrasies of the SAT II format. Physics Hint 1: Know Those Formulas! You aren’t allowed to bring a calculator into the SAT II, nor are you allowed to bring in a sheet of paper with useful information on it. That means that if you haven’t memorized formulas like F = ma and you’re going to lose a lot of points. As we said earlier, 67–80% of the test requires that you know your formulas. This doesn’t mean you have to do a lot of rote memorization. As you become more familiar with the principles of physics, you’ll find that the equations that express these principles will become increasingly intuitive. You’ll find patterns: for instance, the force exerted at any point in a field, be it a gravitational field or an electric field, is inversely proportional to r2. That’s why Coulomb’s Law and Newton’s Law of Gravitation look similar. Knowing your physics will help you know your formulas. A lot of people feel burdened coming into an exam with lots of formulas and equations in their head. It can feel like your mind is “full,” and there’s no room for the problem solving at hand. If you have trouble remembering formulas, you might want to look them over carefully in the minutes before the test, and then, before you even look at the first question, write down the formulas you have a hard time remembering on the back of the question booklet. That way, you can refer back to them without any painful effort of recollection. Physics Hint 2: Estimate This hint goes hand in hand with General Hint 5: Know What You’re Being Asked. Don’t dive blindly into five possible answer choices until you know what you’re looking for. The first way to know what you’re looking for is to understand the question properly. Once you understand the question, get a rough sense of what the correct answer should look like. Estimation is only useful for questions involving calculation: you can’t “estimate” which Law of Thermodynamics states that the world tends toward increasing disorder. In questions involving a calculation, though, it may save you from foolish errors if you have a sense of the correct order of magnitude. If you’re being asked to calculate the mass of a charging elephant, you can be pretty confident that the answer won’t be 2 kg, which would be far too small, or kg, which would be far too big. Estimation is a good way to eliminate some wrong answers when you’re making an educated guess. Physics Hint 3: Put It on Paper Don’t be afraid to write and draw compulsively. The first thing you should do once you’ve made sure you understand the question is to draw a diagram of what you’re dealing with. Draw in force vectors, velocity vectors, field lines, ray tracing, or whatever else may be appropriate. Not only will a visual representation relieve some of the pressure on your beleaguered mind, it may also help the solution jump right off the page at you. Drawing graphs can also make a solution appear out of thin air. Even if a problem doesn’t ask you to express anything in graphic terms, you might find that a rough sketch of, say, the velocity of a particle with respect to time will give you a much clearer sense of what you’re dealing with. And don’t forget to write down those equations! Writing down all the equations you can think of may lead you to a correct answer even if you don’t really understand the question. Suppose you know the problem deals with an electric circuit, and you’re given values for current and electric potential. Write down equations like V = IR and P = IV, plug in values, fiddle around a little, and see if you can come up with an answer that looks right. Physics Hint 4: Answers Are Not Convoluted Remember, on SAT II Physics you’re not allowed to use a calculator, and you’re only given, on average, 48 seconds to answer each question. If you’re working on a problem and find yourself writing out lines and lines of simultaneous equations, trying to figure out or trying to recall your trig identities, you’re probably on the wrong track. These questions are designed in such a way that, if you understand what you’re being asked, you will need at most a couple of simple calculations to get the right answer. Physics Hint 5: Eliminate Wrong Answers In General Hint 6: Know How To Guess, we explained the virtues of eliminating answers you know to be wrong and taking a guess. On most questions, there will be at least one or two answer choices you can eliminate. There are also certain styles of questions that lend themselves to particular process-of-elimination methods.Classification QuestionsQuestions 1–3 relate to the following quantities:(A)Frequency英语作文
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