Except that most reputable universities don't let you do that. You can use your own textbook for the course, if you want, you just can't accept any royalties for it.
That might work at some universities, but there are a (not insignificant) number of students who simply refuse to buy used textbooks. After all, they aren't paying $20k per semester to learn old calculus! The sad…
I'm not sure about Androids, but iPhones do not have a barometric pressure sensor, so the only way to obtain altitude data would be through GPS. For applications like this, where you don't need real-time altitude…
Ethanol has a lower density than gasoline. So, although it has a similar mass-specific energy content, the volume-specific energy content is lower. Ethanol has a greater resistance to ignition than gasoline. But, since…
Well, I think part of the problem is the size of their market. How many more people do you think would buy Mach 6 spy planes if the cost could be reduced by a couple orders of magnitude? Government would buy a few more,…
> It also means the Prius wins in a lot of states. That's true. But I think Tesla is trying to sell the Model S to people who would otherwise buy a similar luxury car. There are a not-insignificant number of people…
Tesla has a cute map of electricity generation by state: http://www.teslamotors.com/goelectric#electricity It looks like there isn't any state where driving an electric actually produces more CO2 than driving a gas car.…
Except that most reputable universities don't let you do that. You can use your own textbook for the course, if you want, you just can't accept any royalties for it.
That might work at some universities, but there are a (not insignificant) number of students who simply refuse to buy used textbooks. After all, they aren't paying $20k per semester to learn old calculus! The sad…
I'm not sure about Androids, but iPhones do not have a barometric pressure sensor, so the only way to obtain altitude data would be through GPS. For applications like this, where you don't need real-time altitude…
Ethanol has a lower density than gasoline. So, although it has a similar mass-specific energy content, the volume-specific energy content is lower. Ethanol has a greater resistance to ignition than gasoline. But, since…
Well, I think part of the problem is the size of their market. How many more people do you think would buy Mach 6 spy planes if the cost could be reduced by a couple orders of magnitude? Government would buy a few more,…
> It also means the Prius wins in a lot of states. That's true. But I think Tesla is trying to sell the Model S to people who would otherwise buy a similar luxury car. There are a not-insignificant number of people…
Tesla has a cute map of electricity generation by state: http://www.teslamotors.com/goelectric#electricity It looks like there isn't any state where driving an electric actually produces more CO2 than driving a gas car.…