“Steel plates are commonly attached to each other with rivets, which are slipped into holes in the plates and rounded over with hammers. The hotness of the rivets makes them easier to round over, but their hotness has another important advantage in providing a tight fit. What is it? Explain why.”
This relates to one of the characteristics of heat, in that heated objects expand, then contract when the temperature decreases, since the molecules move faster in heat and slow in the cold. The hot rivets attached to the steel plates will eventually cool, then they will contract, pulling the steel plates with them in both directions to make a more tight fit for them on the structure.
2. “If the composition of the upper atmosphere were changed so that it permitted a greater amount of terrestrial radiation to escape, what effect would this have on Earth’s climate? Explain in detail.” …show more content…
One may think about this and conclude that this means the upper atmosphere is bad, since it is known that the temperature in sealed cars can become unbearable hot in the summer. But anyone who thinks this is far from correct. Earth’s temperature (of course it varies depending on time and location), is of course habitable, and has been for millions of years. But if we were to compare Earth’s climate to a car, then the planet we live on now is like a car in sitting in the sun in July with its doors and windows closed. It is likely very hot in that car, but that car compares to Earth’s average temperature today. So how would the Earth and the car compare if the car’s windows were opened, or in the Earth’s case, if the upper atmosphere was removed? In the car’s case, it would be anywhere from slightly less-hot, to not hot at all. But in the Earth’s case, it would get very, very cold, possibly to where the planet would become
This relates to one of the characteristics of heat, in that heated objects expand, then contract when the temperature decreases, since the molecules move faster in heat and slow in the cold. The hot rivets attached to the steel plates will eventually cool, then they will contract, pulling the steel plates with them in both directions to make a more tight fit for them on the structure.
2. “If the composition of the upper atmosphere were changed so that it permitted a greater amount of terrestrial radiation to escape, what effect would this have on Earth’s climate? Explain in detail.” …show more content…
One may think about this and conclude that this means the upper atmosphere is bad, since it is known that the temperature in sealed cars can become unbearable hot in the summer. But anyone who thinks this is far from correct. Earth’s temperature (of course it varies depending on time and location), is of course habitable, and has been for millions of years. But if we were to compare Earth’s climate to a car, then the planet we live on now is like a car in sitting in the sun in July with its doors and windows closed. It is likely very hot in that car, but that car compares to Earth’s average temperature today. So how would the Earth and the car compare if the car’s windows were opened, or in the Earth’s case, if the upper atmosphere was removed? In the car’s case, it would be anywhere from slightly less-hot, to not hot at all. But in the Earth’s case, it would get very, very cold, possibly to where the planet would become