Question

Срочно!! Помогите решить! Игла при проигрывания грампластинок давит на неё с силой 0,27 H. Какое давление оказывает игла, если площадь её острия равна 0,0003 см²?

Answer 1

P=F/S, см^2=см*см=10^-4м => P=0.27/(3*10^-8)=9МПа

Answer 2

P=F/S=0,27H*10^4/3см^2=0,09*10^8Па=9*10^6Па.

Answer 3

Calculating Pressure Exerted by the Needle on the Vinyl Record

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

Pressure (P) = Force (F) / Area (A)

Given: - Force (F) = 0.27 H (assuming this is in Newtons) - Area (A) = 0.0003 cm²

Using the given values, we can calculate the pressure exerted by the needle on the vinyl record.

Calculation

Force (F) = 0.27 H = 0.27 N

Area (A) = 0.0003 cm² = 0.0003 × 10^-4 m² = 3 × 10^-8 m²

Now, we can calculate the pressure using the formula:

Pressure (P) = Force (F) / Area (A)

Pressure (P) = 0.27 N / (3 × 10^-8 m²)

Pressure (P) ≈ 9 × 10^6 Pa

So, the pressure exerted by the needle on the vinyl record is approximately 9 × 10^6 Pascal.