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

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.)

How can the legislative branch be checked by the judicial branch? How can the legislative branch be checked by the executive branch?

What happens to overhead rates based on direct labor when automated equipment replaces direct labor?

If 1600 J of energy are transferred as heat to an engine and 1200 J are transferred as heat away from the engine to the surrounding air, what is the efficiency of the engine?

A very crude model for an atomic nucleus is a cubical box $1 \mathrm{~fm}$ on a side. What would be the energy of a gamma ray emitted if a proton in such a nucleus made a transition from its first excited state to the ground state?

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?

An automobile engine has a power output for doing work of $150 \mathrm{kW}$ (about 200 hp). The efficiency of the engine is 0.32. Determine the heating input per second to the engine by burning gasoline and the heating rate of the engine to the environment.

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 $B$?

The greatest probability of finding the electron in a small-volume element of the 1 orbital of the hydrogen atom is at the nucleus. Yet the most probable distance of the electron from the nucleus is $53 \mathrm{pm}$. How can you reconcile these two statements?

Carnot engine A operates at a higher hot reservoir temperature than Carnot engine B. Will engine A necessarily have a higher Carnot efficiency? Explain.

A drawer contains eight different pairs of socks. If six socks are taken at random and without replacement, compute the probability that there is at least one matching pair among these six socks. Hint: Compute the probability that there is not a matching pair.

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