How Long Does It Really Take To Drive Around Manhattan?
That's within two minutes of how long Google Maps would tell you that the 26.5 mile route would take. But what I learned about the run isn't just how long it takes to drive around Manhattan at night with reasonably light ... how many times we get cut ...
Sun exposure cuts the risk of certain cancers in half
In the industrialized world, many men and women have fled to the shade, working under roofs day in and day out. Naturally, the skin craves the sun's light ... but we do see an association between UV exposure and some cancers," she said. 30 minutes of ...
How Long Does it Take Sunlight to Reach the Earth?
Here’s a question… how long does it take ... the Sun at a distance of about 150 million km. Light moves at 300,000 kilometers/second. Divide these and you get 500 seconds, or 8 minutes and 20 seconds. This is an average number. Remember, the Earth ...
How to use a moon of Jupiter to measure light speed
So far, so good, he thought, because sometimes Jupiter's reflected light does have farther to go to reach him on Earth. Jupiter takes 12 years to complete one orbit around the Sun. So, sometimes light has to travel farther to get from Jupiter to Earth.
To Your Health: Tips to protect yourself from UV rays
There are some steps you can take ... you get the equivalent of 1 minute of UVB rays for each 30 minutes you spend in the sun. So one hour in the sun wearing SPF 30 sunscreen is the same as spending two minutes totally unprotected. People often do not ...