Chapter 2: Problem 2
State the law of conservation of energy.
Chapter 2: Problem 2
State the law of conservation of energy.
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Do the following calculations, and write the answers in scientific notation. $$\begin{array}{l}{\text { a. } 37000000 \times 7100000} \\ {\text { b. } 0.000312 / 486} \\ {\text { c. } 4.6 \times 10^{4} \mathrm{cm} \times 7.5 \times 10^{3} \mathrm{cm}}\end{array}$$
Which of the following statements contain exact numbers? a. There are 12 eggs in a dozen. b. Some Major League Baseball pitchers can throw a ball over 140 \(\mathrm{km} / \mathrm{h}\) . c. The accident injured 21 people. d. The circumference of the Earth at the equator is 40000 \(\mathrm{km} .\)
A student measures the mass of some sucrose as 0.947 mg. Convert that quantity to grams and to kilograms.
For one week, practice your observation skills by listing chemistry-related events that happen around you. After your list is com- piled, choose three events that are especially interesting or curious to you. Label three pocket portfolios, one for each event. As you read the chapters in this textbook, gather information that helps explain these events. Put pertinent notes, questions, figures, and charts in the folders. When you have enough information to explain each phenomenon, write a report and present it in class.
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