Quantitative Astronomy Guided Notes.docx

Answer you use a coefficient which you move the

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Answer: You use a coefficient, which you move the decimal point to the left. Then you use an exponent which is the amount of spaces you move to the right, meaning times 10. Mass of sun = 2.0 x10^30 kg Why is it so important to get the exponent correct when working in scientific notation? Answer: It is important because the difference could be huge, for example an exponent of 3 is 10 times bigger than 2 How would you enter a number like 1.5 x 10 11 into your scientific calculator? Answer: First you type in the coefficient. Look for the key EXP or EE. Then you type in the exponent What are two of the most common mistakes you can make when dealing with exponents and a scientific calculator? a. Typing in the incorrect info in the calculator b. Writing the wrong answer Positive exponents are used for really large numbers. Negative exponents are used for really small numbers.
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Test Yourself – Exponents Calculate 1 2 10 4 10 2 x x Answer: 500 Test Yourself – Sample Exponent Calculations 1. 8 x 10^-1 2. 7.2 x 10^-3 3. 4.2 x 10^13 4. 3.96 x 10^-17 5. 4.68X10^2 6. 2.84x10^-66
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What is an easy way to describe what a formula is? Answer: A shorthand way of saying how one quantity relates to another The equation “D = vt” can be written in words as: Answer: The distance an object travels equals toe average velocity multiplied by the travel time The steps to doing a word problem are: And an example with calculation is: 1. Read the problem What is it asking for? What info have I been given?
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