Question

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

Answer 1

1м2=10000см2

1см2=0,0001м2

0,0003 см2=0,00000003м2

р=0,27:0,00000003=9000000Па

Answer 2

Дано:

F=0,27Н.

S=0,0003 см^2=3*10^-8 м^2. 1 м^2 = 10000 см^2.

P=?
________

Решение:

Формула давления:
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Answer 3

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 * (1/10000) m² = 0.00000003 m²

Substituting the values into the formula: Pressure = 0.27 N / 0.00000003 m²

Calculating the pressure: Pressure = 9,000,000 N/m²

Therefore, the pressure exerted by the needle is 9,000,000 N/m².

Please note that the above calculation is based on the given information and assumes that the force is evenly distributed over the entire area of the needle's tip.