Blood pressure is measured by using sphygmomanometer Step2 An inflatable cuff is placed around the upper arm and inflated until all blood flow,in or out of the arm stops. The blood flow is monitored using a stethoscope. Step2 After inflation,there is no sound but as air escapes from the cuff, the pressure decreases until itContinue reading “How to measure blood pressure?”
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If A+B+C=π then,Prove that: cos²A + cos²B + cos²C + 2 cosA . cosB . cosC = 1
Solution: Here,A + B + C = π then A+B=π-C B+C=π-A A+C=π-C Now, Let’s consider 2 cosA . cosB . cosC = cosA [2 cosB.cosC] =cosA[cos(B+C)+ cos(B- C)] =cosA [cos(180-A) + cos(B-C)] =cosA [-cosA + cos(B-C)] = -cos²A + cosA cos(B-C) = -cos²A + {2cosA cos(B-C)}/2 =-cos²A + {cos(A-B+C) + cos(A+B-C)}/ 2 = -cos²A +Continue reading “If A+B+C=π then,Prove that: cos²A + cos²B + cos²C + 2 cosA . cosB . cosC = 1”
A new quilt is warmer than an old one. Why?
A new quilt has air spaces between the layers of the woollen or cotton. These air spaces trap air and it acts as insulator(insulators are bad conductor of heat). They do not allow the body heat/temperature to escape out from body and keeps warm. however the old quilt, the layers of woolen press against eachContinue reading “A new quilt is warmer than an old one. Why?”
My First Blog Post
Be yourself; Everyone else is already taken. — Oscar Wilde. This is the first post on my new blog. I’m just getting this new blog going, so stay tuned for more. Subscribe below to get notified when I post new updates.
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