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So the Yogabook allows you to place a piece of paper over its digitizer pad and write on the paper while transferring your writing to its screens. As someone who likes handwritten notes on physical, but also likes the ease of searching electronic notes plus its portable, I really like the idea behind Yogabook. Are there similar devices I should look into?

I googled the word, but can someone explain in layman's terms?

A few months ago, I moved from GA to VT. I hiked a lot back in GA without ever getting headaches or experiencing excessive tiredness/grogginess. Now that I've moved to VT, I get mild headaches an hour or so into my hikes. Then afterwards, I'm completely groggy and very tired. I'm careful to eat and drink enough, and I maintain a healthy diet. The distance and difficulty of my hikes haven't changed.

What could be causing this? Maybe just a difference in elevation?

The only way for me to relieve the grogginess after hiking is by drinking coffee. But, I don't typically drink coffee. I'm apt to think it's not healthy to just "fix" this grogginess with coffee. Or is it? Could my body just need the extra caffeine?

If I have 3 carbons with 2 hydrogens at each end, and then another molecule with 4 carbons and 2 hydrogens at each end, how do the number of carbons affect the direction (x,y,z) of the hydrogen's p-orbitals?

Is this sentence active or passive?

I said that it was OK.

If I have the equation 0.74 = 650/(A*0.005) how do I isolate or find A?

I'm confused. I understand the protocells formed early in life and contained RNA. I also understand the eukaryotic cells developed by a prokaryote engulfing two different cells (what are now mitochondria and chloroplasts).

But how did protocells become prokaryotes?

If I throw someone straight up into the air and within 0.3 m the person reaches 54 m/s and the person's weight is 50 kg, how do I calculate the amount of work I had to use to propel the person?

How do I find a length (any length) given the following info?

hc = 12400 angstrom eV

meC^2 = 0.5 MeV =0.5 * 106 eV

h is the sped of leght, c is planck constant and me is electron mass.

I just don't even know where to start.

What would happen if you deprive an egg, which shell is made of CaCO3, of oxygen? What would happen to the shell?

Can anyone recommend books, articles, movies, or any media related to the origins of cells--origins as in the world's first cells and how they have evolved to today's cells?

Does anyone know if I can download FaceTime to run on my Windows 7? If so, where?

If not, is there any way to connect my iPhone to my laptop to make it work?

I'm 21 and am moving 1100 miles away from home to go to college. I feel really sick to my stomach and can't stop crying. Any advice?

I'm moving from GA to MA and I don't have any idea about what footwear I need to go hiking throughout the winter. Typically, in the spring, summer, and fall months I go barefoot and then wear vibrams in the winter. But this isn't going to workout up north.. .

What type of footwear do I need to look at getting to hike throughout the winter?