Test # 134
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1450 questions in 145 tests. Each test contains 10 questions.
Idiom of the Day
let sleeping dogs lie
to not make trouble if you do not have to
"You should let sleeping dogs lie and not begin to talk about past problems."
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Your Phones Camera Can See Your Blood Pulsing Through Your Skin
There are lots of great fitness trackers out there, and many phones are beginning to incorporate trackers directly into the hardware. But say you dont happen to own a tracker and you want to check your pulse rate, what are you supposed to do? Put two fingers on your neck and look at the clock like some Victorian-era bloodletter? Fortunately, you dont have to!
The developers behind apps like Instant Heart Rate (available for iOS, Android, and Windows) claim they can read your heart rate through your devices camera. Just place your finger in front of the camera and the app monitors the slight changes in skin color as blood pumps through your finger and then calculates your pulse. If holding your finger against your phones camera seems like too much work, the Cardiio (iOS) app claims it can use your phones camera to read your pulse just by monitoring the minute changes of color in your face!