Find the relative mass of any atom by adding the number of protons to the number of neutrons. Hydrogen has a relative atomic mass of 1, and carbon-12 has a relative atomic mass of 12. Isotopes of the same element have different numbers of neutrons, so you need to calculate for one spe...
with a mirror set up 5 miles (8 km) away to reflect it back to its source. Varying the speed of the wheel allowed Fizeau to calculate how long it took for the light to travel out of the hole, to the adjacent
Our brains also adapted by learning to become incredibly energy efficient. At any one time, only a small proportion of brain cells are signaling, a process known as “sparse coding,” allowing the brain to use the least amount of energy while transferring the most information. The need to co...
Discover everything there is to know about the northern lights, including how they form, where they can be seen and what causes their colors. (Image credit: Westend61 via Getty Images) Jump to: What causes the northern lights? Northern lights FAQs Solar maximum Where & when to see...
As a rough rule of thumb, you can calculate the temperature at any altitude by subtracting 3.5F (or 2C) for every 1000 feet of altitude above sea level. (This is known as the lapse rate). So in general, the temperature at 30,000 feet is 105F of 60C below the ground temperature. ...