Select the correct answer. What does the number, or density, of field lines on a source charge indicate?
Ο Α.
direction of charge on the source charge
OB.
amount of charge on the test charge
OC.
amount of charge on the source charge
OD.
direction of charge on the test charge
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The slope of a good speed time indicates ? a. velocity b. acceleration c. direction d. speed

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

The mantle is made up of which structural zones?