List some precautionary measures to take before evacuating because of a hurricane
What will be an ideal response?
ANSWER: Anchor anything that can become a projectile in high winds; board up windows and doors with plywood; store a supply of drinking water, medication, and food; move boats to a safe place; fill your gas tank; turn off appliances; turn refrigerator to its coldest setting; close the garage, and turn off gas lines.
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Almost all the energy we use comes either directly or indirectly from the sun.
Answer the following statement true (T) or false (F)
Many solvents expand to occupy greater volumes with increasing temperature. What happens to the concentration of a solution made with such a solvent as its temperature is increased?
A. Since it has a greater ability to dissolve more solute at a higher temperature, its concentration has increased. B. The concentration of a solution increases as the solute fits into the new spaces between the molecules. C. Since it has a greater ability to dissolve more solute at a higher temperature, its concentration has decreased. D. Since concentration depends on how much mass is dissolved in a given volume, as the volume increases, the concentration decreases.
When the distance between two charges is halved, the electrical force between the charges
A) quadruples. B) doubles. C) halves. D) is reduced by one-quarter. E) none of the above
Radiometric dating is based on ____
a. the presence of fossils b. cross-cutting relationships c. spontaneous decay of radioactive elements d. superposition e. dendrochronology