prove that the tangents at the extremities of any chord make equal angles with the chord.
Answers
Step-by-step explanation:
(a) we know,
P =dgh where, h is dpeth , g is accⁿ due to gravity and d is density of liquid .
Therefore , pressure increases, when depth increases . so, the blood pressure in humans is greater at the feet than the brain .
(B) The density of air is maximum at the surface of the earth and decrease rapidly with height. At height of 6 km , the density of air decreases nearly half of its value at the sea level. Beyond 6km height , the density of air decreases very slowly with height .hence, the atmosphere pressure at the height of about 6km decreases to nearly half of its value at the sea level .
(c) according to Pascal's law,
Pressure is transmitted equally in all directions inside the liquid. it means hydraulic pressure has no fixed direction . so, it's scalar quantity.