Just what is stationary in a stationary state? The particle? Something else?

A 1.2-kg pot of water at 20$^{\circ} \mathrm{C}$ is put on a stove supplying 250 Wto the water. How long will it take to come to a boil (100$^{\circ} \mathrm{C}$)?

Find the lowest temperature at which it is possible to have water in the liquid phase. At what pressure must the liquid exist?

Saturated vapor water at 250$^{\circ} \mathrm{C}$ is expanded to a lower pressure with constant temperature. Find the changes in u and s when the final pressure isa. 100 kPab. 50 kPac. 10 kPa

Determine the momentum of an electron moving (a) at speed $2.4 \times 10^4 m/s$ (about three times escape velocity) and (b) at speed $2.4 \times 10^8 m/s.$ (c) In each case, by how much is the classical formula in error?

A bottle with a volume of 0.1 m3 contains butane with a quality of 75% and a temperature of 300 K. Estimate the total butane mass in the bottle using the generalized compressibility chart.

How can the sales-quantity variance be decomposed further?

Water is boiled at $90^\circ C$ by a horizontal brass heating element of diameter 7 mm. Determine the surface temperature of the heater for the minimum heat flux case.

A 1 ns pulse of electromagnetic waves would be 30 cm long, (a) Consider such a pulse of 633 nm wavelength laser light. Find its central wave number and the range of wave numbers it comprises, (b) Repeat part (a), but for a 1 ns pulse of 100 MHz radio waves.

An electron is in the 3d state of a hydrogen atom. The most probable distance of the electron from the proton is $9a_0.$ What is the probability that the electron would be found between $8a_0$ and 100?

There are at least 3 different purposes for which we measure product costs. They are (1) pricing and product mix decisions, (2) determining the appropriate charge for a government contract, and (3) for preparing financial statements for external reporting following Generally Accepted Accounting Principles. On the following table, indicate whether the indicated cost would be included or excluded for the particular purpose. If your answer is not definitive (include or exclude), provide a short explanation of why.

$$\begin{matrix} \text{Type of Cost} & \text{Purpose: Pricing/ Product Mix} & \text{Purpose: Government Contract} & \text{Purpose: Financial Statement (using GAAP)}\\ \text{Direct Materials } & \text{ } & \text{ } & \text{ }\\ \text{Direct manufacturing Labor} & \text{ } & \text{ } & \text{ }\\ \text{Manufacturing Overhead} & \text{ } & \text{ } & \text{ }\\ \text{Marketing Costs} & \text{ } & \text{ } & \text{ }\\ \text{Distribution Expense } & \text{ } & \text{ } & \text{ }\\ \text{Customer Service} & \text{ } & \text{ } & \text{ }\\ & \text{ }\\ & \text{ }\\ \end{matrix}$$

Consider a water pipe of length L = 17 m, inner radius $r_1 = 15 cm,$ outer radius $r_2 = 20 cm,$ and thermal conductivity $k = 14 W/m \cdot K.$ Heat is generated in the pipe material uniformly by a 25-kW electric resistance heater. The inner and outer surfaces of the pipe are at $T_1 = 60^\circ C$ and $T_2 = 80^\circ C,$ respectively. Obtain a general relation for temperature distribution inside the pipe under steady conditions and determine the temperature at the center plane of the pipe.

At a given temperature and pressure, do you think the mass diffusivity of copper in aluminum will be equal to the mass diffusivity of aluminum in copper? Explain.

A 0.5-m-long thin vertical plate is subjected to uniform heat flux on one side, while the other side is exposed to cool air at $5^\circ C.$ The plate surface has an emissivity of 0.73, and its midpoint temperature is $55^\circ C.$ Determine the heat flux subjected on the plate surface.