• Consider eight, eight-cubic centimeter (8 cm³) sugar cubes stacked so that they form a single 2 x 2 x 2 cube. How does the surface area of the single, large cube compare to the total surface area of the individual eight cubes? Report your answer as a ratio. Be sure to show all calculations leading to an answer?

1. When a steadily-flowing gas flows from a larger-diameter pipe to a smaller-diameter pipe, what causes the pressure in the smaller pipe to drop? Use 3 – 4 complete sentences to explain your answer?

1. In a lab experiment, 45 grams of a metal are heated from 22⁰C to 78⁰C by the addition of 450 J of heat. What is the specific heat of the metal? Show all calculations leading to an answer?

1. Suppose the thickness of an oil film on water is just the right thickness for canceling red light. What color will your eye see? Explain using 3 – 4 complete sentences.?
2. Two electrically-charges spheres are suspended from insulated threads a certain distance from each other. There is a certain amount of electrostatic force between them. Describe specifically (not just increase or decrease) what happens to this force in each of the scenarios below (1 pt. ea.):
3. The charge on one sphere is reduced by half
4. The charge on both spheres is doubled
5. The distance between the spheres is increased by a factor of three

1. The isotope, Carbon-14 emits beta radiation and has a half live of 5730 years. How long will it take for the amount of radiation this gives off to drop by a factor of 4?

1. The total U.S. consumption of electricity in a particular year was 5.0 x 10¹² kilowatt-hours. What is the mass equivalence of this amount of energy? Show all calculations leading to an answer.

When uranium-238 emits an alpha particle, what isotope is created?  Show the nuclear equation for this reaction.

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