Earth's temperature with no atmosphere

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PhysicsHelps

Күн бұрын

What would the temperature of Earth be if we had no atmosphere?

Пікірлер: 10

@spacejunky4380 6 жыл бұрын

Thank you for making this video. I love how detailed you are and everything makes sense. Your video is super clear and easy to understand.

@levelup2014 2 ай бұрын

How did you make the videos on this channel did you just screen record your computer whilst you explained the concepts?

@jonathangrindell1335 Жыл бұрын

Can you please make a video explaining how too Calculate the temperature of a Planet in Synchronous rotation With the Sun?

@alexmazur2494 7 жыл бұрын

Thank you for making this video, it has helped me immensely in doing a similar assignment. One question about the final equation. At the 8:20 mark, would the area of the earth receiving energy from the sun not be 2 pie r^2, as that is the formula in calculating half of a sphere without the base, instead of the pie r^2 shown?

@PhysicsHelps 7 жыл бұрын

You're right that 2pi*r^2 would be half the surface area of the sphere. BUT what we're worried about here is the amount of light blocked by the sphere. A way to think about this is to imagine the area of the shadow of the Earth, which would be a circle with the same radius as the earth. The video discusses this around 4:00.

@noonesflower 8 жыл бұрын

I am not so good with equations, but i do know that the earth's albedo is the reflection of the whole shebang, including the CLOUDS; my point being that your calculation cannot be right because to use the albedo means you are including an atmosphere, as it is impossible to have clouds without atmosphere.

@PhysicsHelps 6 жыл бұрын

A bit late on my response here. You're right that clouds are a big part of the albedo of Earth, but it's not the only part. Anything reflective on the surface will also contribute to an albedo. And anything that's not completely black reflects some amount of light.

@kideuler1758 8 жыл бұрын

If the temperature was -19C wouldn't all the water on the planet freeze thus changing the reflective constant to reflect more light which would make the earth even colder

@PhysicsHelps 8 жыл бұрын

Something like that! This is just a really simple example calculation where reflectiveness is held constant.

@kideuler1758 8 жыл бұрын

+PhysicsHelps yeah, it's still really cool though, this is the only channel I come to for advanced physics because you show the calculus and differential equations behind these amazing formulas, great work on another great video!