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Chapter 10: Problem 12

Why do astronauts have to wear protective suits when they are on the surface of the moon?

Short Answer

Expert verified
For life support, temperature regulation, radiation protection, and protection from micrometeoroids.

Step by step solution

01

Understanding the Moon's Atmosphere

The Moon lacks a substantial atmosphere, meaning there is no air to breathe and no atmospheric pressure. Without the Earth's protective layers, astronauts are directly exposed to the vacuum of space.
02

Temperature Extremes

The Moon experiences extreme temperature changes, ranging from about 127掳C (260掳F) when the sun is shining on its surface to -173掳C (-280掳F) in the darkness. Protective suits help maintain a stable, life-supporting temperature for astronauts.
03

Radiation Protection

The absence of a protective atmosphere on the Moon means high levels of solar and cosmic radiation. Astronaut suits are equipped with special materials to protect them from this radiation, which can be harmful to human health.
04

Micrometeoroid Risk

Due to the lack of an atmosphere, the Moon is regularly bombarded by micrometeoroids. The suits are designed to offer protection against potential impacts from small, high-speed particles.
05

Facilitating Mobility and Communication

The suits are equipped with life support systems, communication equipment, and mobility features. These allow astronauts to move, breathe, and communicate efficiently while performing tasks on the Moon's surface.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Moon's Atmosphere
The Moon's atmosphere is virtually non-existent, which presents a host of challenges for astronauts. Unlike the Earth, where a thick atmosphere provides us with air and protection, the Moon's surface lacks these essentials. This means there is no air for astronauts to breathe and no atmospheric pressure to shield them from the vacuum of space.
To survive, astronauts rely heavily on their suits, which serve as a vital barrier. These suits create an artificial environment that supplies oxygen and maintains pressure. This allows astronauts to work and exist comfortably while conducting missions on the lunar surface.
Temperature Extremes
On the Moon, temperatures vary dramatically between day and night. When the Sun shines, temperatures can soar up to 127掳C (260掳F). However, when the Sun sets, temperatures plummet to a chilling -173掳C (-280掳F). Such extreme conditions pose a serious risk to human life.
Astronaut suits are specially crafted to handle these extremes. They are insulated to keep astronauts warm during the freezing lunar nights and reflective enough to shield them from the intense heat of the solar day. By maintaining a stable internal temperature, the suits preserve the health and functionality of astronauts as they explore the Moon.
Radiation Protection
Radiation is a significant concern on the Moon due to its lack of a protective atmosphere. Without it, high levels of solar and cosmic radiation can reach the surface, potentially harming astronauts. Exposure to such radiation over extended periods can lead to severe health problems.
Astronauts wear suits made with layers of protective materials designed to block or absorb this radiation. The suit's materials act similar to a shield protecting a knight, significantly reducing the amount of radiation that reaches the astronaut's body and allowing them to work safely.
Micrometeoroid Risk
The Moon is constantly bombarded by tiny particles called micrometeoroids. These small, speedy particles can pose a risk to astronauts due to the Moon's lack of atmospheric protection.
Astronauts rely on their suits, which are built with tough outer layers to protect against impacts. These layers are engineered to withstand collisions with micrometeoroids, ensuring that astronauts remain safe from potential punctures and injuries while working on the lunar surface.
This protective feature is crucial for the safety and success of lunar missions.
Life Support Systems
To operate effectively on the Moon, astronaut suits must be equipped with robust life support systems. These systems provide oxygen for breathing, remove carbon dioxide from the air exhaled by the astronaut, and regulate temperature.
Additionally, the suits are fitted with communication systems, allowing astronauts to speak to each other and mission control. Mobility features are also integrated into the design, enabling astronauts to walk, bend, and perform tasks needed during their explorations.
  • Oxygen supply: Essential for breathing in the Moon's airless environment.
  • Temperature control: Protects against extreme lunar temperatures.
  • Communication: Vital for coordinating with team members and ground control.
  • Mobility: Ensures that astronauts can move freely and accomplish their objectives.
These systems transform the suit into a personal spacecraft, critical for exploration and survival on the Moon.

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Most popular questions from this chapter

About \(8.0 \times 10^{6}\) tons of urea \(\left[\left(\mathrm{NH}_{2}\right)_{2} \mathrm{CO}\right]\) is used annually as a fertilizer. The urea is prepared at \(200^{\circ} \mathrm{C}\) and under high-pressure conditions from carbon dioxide and ammonia (the products are urea and steam). Calculate the volume of ammonia (in liters) measured at 150 atm needed to prepare 1.0 ton of urea.

The following procedure is a simple though somewhat crude way to measure the molar mass of a gas. A liquid of mass \(0.0184 \mathrm{~g}\) is introduced into a syringe like the one shown here by injection through the rubber tip using a hypodermic needle. The syringe is then transferred to a temperature bath heated to \(45^{\circ} \mathrm{C},\) and the liquid vaporizes. The final volume of the vapor (measured by the outward movement of the plunger) is \(5.58 \mathrm{~mL},\) and the atmospheric pressure is \(760 \mathrm{mmHg}\). Given that the compound's empirical formula is \(\mathrm{CH}_{2}\), determine the molar mass of the compound.

Acidic oxides such as carbon dioxide react with basic oxides like calcium oxide \((\mathrm{CaO})\) and barium oxide \((\mathrm{BaO})\) to form salts (metal carbonates). (a) Write equations representing these two reactions. (b) A student placed a mixture of \(\mathrm{BaO}\) and \(\mathrm{CaO}\) of combined mass \(4.88 \mathrm{~g}\) in a \(1.46-\mathrm{L}\) flask containing carbon dioxide gas at \(35^{\circ} \mathrm{C}\) and \(746 \mathrm{mmHg}\). After the reactions were complete, she found that the \(\mathrm{CO}_{2}\), pressure had dropped to \(252 \mathrm{mmHg}\). Calculate the percent composition by mass of the mixture. Assume that the volumes of the solids are negligible.

A \(5.00-\) mol sample of \(\mathrm{NH}_{3}\) gas is kept in a \(1.92-\mathrm{L}\) container at \(300 \mathrm{~K}\). If the van der Waals equation is assumed to give the correct answer for the pressure of the gas, calculate the percent error made in using the ideal gas equation to calculate the pressure.

Air entering the lungs ends up in tiny sacs called alveoli. It is from the alveoli that oxygen diffuses into the blood. The average radius of the alveoli is \(0.0050 \mathrm{~cm},\) and the air inside contains 14 percent oxygen. Assuming that the pressure in the alveoli is 1.0 atm and the temperature is \(37^{\circ} \mathrm{C},\) calculate the number of oxygen molecules in one of the alveoli. (Hint: The volume of a sphere of radius \(r\) is \(\left.\frac{4}{3} \pi r^{3} .\right)\)
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