Question

please answer all 4 questions, please write clear

4. If the pressure in the thermometer abo temperature? ve was 121 kPa, to the nearest Celsius degree what is the 9. The cross-sectional area of the output piston in a hydraulic device is 10 times the area of the input piston. By how much can the device multiply the input force? The cross-sectional area of the output piston in a hydraulic device is 3.0 times the area of the input piston. For each 1.5 cm the input piston moves, how far does the output piston movel 10. What is the average kinetic energy of gas molecules at a temperature of 338 K in units of 10-2 to two decimal places? 7. now ·21 8. If the molecules in Problem 8 have a mole mass of 39 g, to the nearest m/s what is their rms velocity?

Answer 1

9) We know that F₁/F₂ = A₁/A₂

As the area becomes 10 times, so the force will also become 10 times.

10) As the volume of water has to remain constant, A₁l₁ =A₂l₂

_{1×1.5 = x × 3}

_{Hence x =0.5 cm, so the output piston moves by 3 cm.}

_{7) You have done correctly}

_{8) RMS velocity is given by √3RT/M}

_{v rms = √ 3×8.314 ×338/39 × 10}-3

_{= 464.93 m/s}