When we drive at higher speeds for an extended period, the tire warms, and the air within expands and increases pressure. The increase in tire pressure is mostly evident in drag racing. Let us imagine that you are in a drag racing competition. Your pit stop team wanted to know the change in internal energy of the tire in your car in BTU. Before the race, the tire was initially pumped to 107 psig of air. At the first pit stop, the recorded tire pressure was 117 psig. The volume of the tire remained constant at 0.017ft³ and the Cp=7.7 BTU/lbmol-°F. Use the Perry's Chemical Engineering Handbook for your data.

Help with the following question. Please answer all parts of the question

The atmospheric lapse rate on a particular day is constant in the lower part of the atmosphere. At ground level, the pressure is 1020 mBar and the temperature is 15°C. At a height z1 the pressure and temperature are 975 mBar and 11.5 °C. Determine the atmospheric temperature gradient, and the height z1.  

True or false: Osmotic pressure can be explained by the difference in fugacities

2. Here's an interesting one. Consider a sled .. a rocket cart which is used to study acceleration and deceleration effects. (Yes that's a real thing). One way of stopping such a sled is to put a scoop on the front deflecting water upwards as in the image below: Water 60⁰ Assume scoop is 20 cm wide (into page), and dips 8 cm into the water (d = 8 cm). The sled is 1000 kg and initially traveling at 100 m/s. What is the initial deceleration .. remember F = ma.

(b) A piston-cylinder arrangement is shown in the Figure below with the frictionless piston of a diameter of 0.5 m. A stirrer turning at 9000 revolutions is used against the fluid contained in the cylinder. The torque exerted by the stirrer is 1.3 Nm. The piston is held against the fluid by the atmospheric pressure of 101325 Pa. The piston moves outward by a distance of 0.7 m. What is the net work transfer to/by the system (5) Patm=101325 Pa 0.7 m 2/4 stirrer

Nitrogen gas enters a 0.500 m diameter pipe at 31.0 °C, 2.50 atm (absolute), and 4.00 m/s. The pipe rises 31.0 ft and then falls 81.0 ft. The nitrogen gas exits the pipe at 31.0 °C and z, ft 1.60 atm (absolute). The ultimate goal is to find AÉk and AEp in the process. T, °C z, ft Assume N, behaves ideally. P, atm (absolute) и, m/s T, °C P, atm (absolute) и, т/s What is V 1, the volumetric flow rate of nitrogen gas into the pipe section? V1 = m³/s What is m, the mass flow rate into the pipe? m = kg/s What is u2 the average velocity of N2 leaving the pipe section? u2 = m/s What is AĖk, the change in kinetic energy of the gas between the end and the start of the pipe section? ΔΕΚ - J/s

question in image

1. If wind speed doubles, the power output of the turbine will increase by a) 8 times b) 4 times c) 2 times d) 6 times 2. The wind speed at which maximum output power is generated by a wind turbine is called as a) Maximum wind speed b) Cut out wind speed c) Rated wind speed d) Cut in wind speed

Determine the efficiency for the cycle (standard air used as the working fluid) indicated in the sketch. Assume the pressures and temperatures are known quantities at each state. 1-2 constant volume process and 2-3 constant pressure process.