An abundant but dirty energy source is Answer geothermal hot water. coal. nuclea

Question

An abundant but dirty energy source is Answer geothermal hot water. coal. nuclear. petroleum. .3 points Question 10 How fast an object is moving in a particular direction is described by Answer speed. velocity. acceleration. All of the choices are correct. .3 points Question 11 If v = ?f, then how are ? and f related? Answer ? is directly proportional to f. ? is inversely proportional to f. ? is a factor of f. ? and f are unrelated. .3 points Question 12 Imagine a 10 g chunk of aluminum (? = 2.7 g/cm3) and a 10 g chunk of iron (? = 7.9 g/cm3). Which of the following is true? Answer The chunk of iron is smaller than the chunk of aluminum. The chunk of iron is more massive than the chunk of aluminum. The chunk of aluminum is smaller than the chunk of iron. Both objects have the same volume. .3 points Question 13 In the equation: Q = mc?t, the c stands for the Answer heat of vaporization. number of calories gained or lost. convection coefficient. specific heat. .3 points Question 14 Kinetic energy refers to Answer energy of motion. energy of position. energy stored in fossil fuels. electrical energy. .3 points Question 15 Measured properties that have different values at different times are Answer the result of measurement errors. impossible. called variables. called scientific flukes.

Explanation / Answer

1. coal 10. all of the above choices are correct 11. they are inversely related to each other 12. the chunk of iron is smaller than the chunk to aluminium 13. specific heat 14. energy of motion 15. variables

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