Question

При проигрывании грампластинки игла давит на неё с силой 0,27 Н. Какое давление оказывает игла, если площадь её острия равна 0,0003 см2?

Answer 1

S=9*10^-8
F=0.27
p=F/S= 0.27/9*10^(-8)= 3*10^(-10)

Answer 2

Calculation of Pressure Exerted by the Needle

To calculate the pressure exerted by the needle, we can use the formula:

Pressure = Force / Area

Given that the force exerted by the needle is 0.27 N and the area of the needle's tip is 0.0003 cm², we can substitute these values into the formula to find the pressure.

Converting the area from cm² to m²: 0.0003 cm² = 0.0003 × (1/100) × (1/100) m² = 0.000003 m²

Substituting the values into the formula: Pressure = 0.27 N / 0.000003 m²

Calculating the pressure: Pressure = 90,000,000 Pa

Therefore, the pressure exerted by the needle is 90,000,000 Pa.

Please note that this calculation assumes that the force is evenly distributed over the entire area of the needle's tip.