Reread all or part of the text to help you answer the following questions.

What is the daily routine of the automated house?

Applicant A is qualified for jobs $J_1, J_2, J_4,$ and $J_5;$ B is qualified for jobs $J_1, J_4,$ and $J_5;$ C is qualified for jobs $J_1, J_4,$ and $J_5;$ D is qualified for jobs $J_1$ and $J_5;$ E is qualified for jobs $J_2, J_3,$ and $J_5;$ and F is qualified for jobs $J_4$ and $J_5$. (a) Model this situation as a matching network. (b) Use Algorithm to find a maximal matching. (c) Is there a complete matching?

Engine $A$ has an efficiency of $66 \%$. Engine $B$ absorbs the same amount of heat from the hot reservoir and exhausts twice as much heat to the cold reservoir. Which engine has the greater efficiency? Explain. What is the efficiency of engine $B$?

Model rocket engines are rated by the impulse that they deliver when they fire. A particular engine is rated to deliver an impulse of 3.5 kg$\cdot$m/s. The engine powers a 120 g rocket, including the mass of the engine. What is the final speed of the rocket once the engine has fired? (lanore the change in mass as the engine fires and ignore the weight force during the short duration firing of the engine.)

The compression ratio r of an engine is the ratio of maximum to minimum gas volume. (For the gasoline engine of the preceding problem, The given figure shows that the compression ratio is 5.) Find a general expression for the engine efficiency of an Otto-cycle engine as a function of compression ratio.

Suppose a Carnot engine can be operated between two reservoirs as either a heat engine or a refrigerator. How is the coefficient of performance of the refrigerator related to the efficiency of the heat engine?

Complete the statements. The terms in an expression that have the same variable with matching exponents are ?

Two Carnot engines, A and B, utilize the same hot reservoir, but engine A is less efficient than engine B. (a) Which engine produces more work for a given heat input ? (b) Which engine has the lower cold-reservoir temperature? Give your reasoning. Carnot engine A has an efficiency of 0.60, and Carnot engine B has an efficiency of 0.80. Both engines utilize the same hot reservoir, which has a temperature of 650 K and delivers 1200 J of heat to each engine. Find the magnitude of the work produced by each engine and the temperatures of the cold reservoirs that they use.

How many user names have no matching adjacent letters or digits?

Suppose a Carnot engine can be operated between two reservoirs as either a heat engine or a refrigerator. How is the coefficient of performance of the refrigerator related to the efficiency of the heat engine?

In the case of the single-stub matching network, what are the two degrees of freedom?

When you throw a baseball, its de Broglie wavelength is $(a)$ the same size as the ball. $(b)$ about the same size as an atom. $(c)$ about the same size as an atom's nucleus. $(d)$ much smaller than the size of an atom's nucleus.

Describe how a heat engine works, including the four strokes of the heat-engine cycle.

What does the article say about matching sound cards to speakers?