Answers to Physics Module Questions - Module #12

Which has more surface area?
1. a whole potato
2. a potato cut into four quarters
3. a potato cut into Freedom fries (ex-French fries)
4. all of these have the same surface area
Doubling the length of the sides of a cube multiplies its volume by
1. 2 and its surface area by 1
2. 4 and its surface area by 2
3. 6 and its surface area by 3
4. 8 and its surface area by 4
5. does not change its volume
Halving the diameter of a rope will multiply its strength by
1. 1
2. 1/2
3. 1/4
4. 1/8
5. 2
6. 4
7. not enough information
Which has greater surface area for a given body weight (i.e., greater surface area per unit weight)
1. a snake
2. an elephant
3. a bowling ball
4. a piece of string
5. not enough information
An object has a mass of 60 kg and a density of 30 kg per cubic meter. What is the volume of the object?
1. 1800 cubic meters
2. 2 cubic meters
3. 30 cubic meters
4. 60 cubic meters
5. not enough information

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