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Chapter 10: Problem 1

Mars has an average atmospheric pressure of 0.007 atm. Would it be easier or harder to drink from a straw on Mars than on Earth? Explain. [Section 10.2]

Short Answer

Expert verified
It would be easier to drink from a straw on Mars than on Earth. This is because Mars has a significantly lower atmospheric pressure (0.007 atm) compared to Earth (1 atm). The greater pressure difference between the inside and outside of the straw on Mars allows the liquid to be pushed up the straw more easily.

Step by step solution

01

Recall the mechanism of drinking from a straw

When we drink from a straw, we create a partial vacuum inside the straw by sucking out the air, which reduces the pressure inside the straw. The atmospheric pressure outside then pushes the liquid up the straw and into our mouth. The greater the difference between the pressures inside and outside the straw, the more the liquid is pushed up the straw.
02

Compare the atmospheric pressure on Mars and Earth

We are given that Mars has an average atmospheric pressure of 0.007 atm. The atmospheric pressure on Earth is 1 atm, which is significantly higher.
03

Analyze the effect of pressure on drinking from a straw

If the pressure difference between the inside and outside of the straw is greater, the liquid will rise more easily in the straw. Since the atmospheric pressure on Mars is significantly lower than that on Earth, the pressure difference between the inside and outside of the straw on Mars would be greater than on Earth.
04

Determine if it is easier or harder to drink from a straw on Mars

As we concluded in step 3, the pressure difference on Mars is greater than on Earth, which would make it easier for the liquid to be pushed up the straw. Therefore, it would be easier to drink from a straw on Mars than on Earth.

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Most popular questions from this chapter

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