A balloon carrying a first-order thermometer with 15-sec time constant rises through the atmosphere at 6 m/sec. Assume temperature varies with altitude at 0.15 °C/30m. The balloon radios temperature and altitude readings back to the ground. At 3000 m the balloon temperature is 0°C. What is the true altitude at which 0°C occurs? says the

The temperature of a system rises by 120°C during a heating process. Express this rise in temperature in kelvin. The rise in temperature is 393 K. 2 5 8

One mole of a gas obeys the Ideal Gas Law PV = 20T, where P is pressure, V is volume, and T is temperature. If the temperature T of the gas is increasing at the rate of 5 °C/s and if, when the temperature is 80 °C, the pressure P is 10N/m? and is decreasing at the rate of 2- find the m2 . s rate of change of the volume V with respect to time.

An incompressible fluid oscillates harmonically (V = Vosinut, where Vis the velocity) with a frequency of 9 rad/s in a 6-in.-diameter pipe. A 1/5 scale model is to be used to determine the pressure difference per unit length, Ap, (at any instant) along the pipe. Assume that Api= f(D, Vo, w, t, u, p) where D is the pipe diameter, w the frequency, t the time, the u fluid viscosity, and p the fluid density. If the same fluid is used in the model and the prototype, at what frequency should the model operate? Wm i rad/s