You observe that a particular gene is being transcribed during development. How can you tell whether the expression of this gene is under transcriptional or translational control?

A factor that can change in an experiment is called a(n)

$$\textbf{\ \ a.}\text{ control.}$$

$$\textbf{\ \ b.}\text{ hypothesis.}$$

$$\textbf{\ \ c.}\text{ inference.}$$

$$\textbf{\ \ d.}\text{ variable.}$$

In a control system, an accelerometer consists of a 4.70-g object sliding on a calibrated horizontal rail. A low-mass spring attaches the object to a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out vibrations of the sliding object. When subject to a steady acceleration of 0.800g, the object should be at a location 0.500 cm away from its equilibrium position. Find the force constant of the spring required for the calibration to be correct.

Red Valve Co. of Carnegie, Pennsylvania, makes a control pinch valve that provides accurate, repeatable control of abrasive and corrosive slurries, outlasting gate, plug, ball, and even satellite coated valves. How much can the company afford to spend now on new equipment in lieu of spending $75,000 four years from now? The company’s rate of return is 12% per year.

A vehicle with a particular defect in its emission control system is taken to a succession of randomly selected mechanics until r = 3 of them have correctly diagnosed the problem. Suppose that this requires diagnoses by 20 different mechanics (so there were 17 incorrect diagnoses). Let p = P(correct diagnosis), so p is the proportion of all mechanics who would correctly diagnose the problem. What is the mle of p? Is it the same as the mle if a random sample of 20 mechanics results in 3 correct diagnoses?

Refer to the case related to Diamond Foods. Answer the following:

• a. Did Diamond Foods commit an illegal act? Explain.
• b. Evaluate the control environment at Diamond Foods.

An electron initially located at the origin of a coordinate system is projected horizontally into a uniform electric field with magnitude $E$ and directed upward. If the initial speed of the electron is $v_0$, then its trajectory is

$$x=v_0t\hspace{6pt}y=-\frac{1}{2}\left(\frac{eE}{m}\right)t^2$$

where $e$ is the charge of the electron and $m$ is its mass. Show that the trajectory of the electron is a parabola.

Note:The deflection of electrons by an electric field is used to control the direction of an electron beam in an electron gun.

In TCP, some segment types can be used only for control; they cannot be used to carry data at the same time. Can you define some of these segments?

"Just 1 capsule of Brand $X$ can provide 24 hours of acid control." (Actual brand will not be named.) What must be more clearly defined in this statement?

The researchers also performed control treatments. Suggest two controls they might have used, and explain how each would be helpful in interpreting the results described

In an inspection with a sample size of $12$ and a sample number of $40$, it was found that the average range was $14$ and the average of averages was $80$. Calculate the control limits for averages and for ranges.

Summarize how large-scale geologic features control the distribution of oil, gas, oil shale, coal, coal-bed methane, uranium, and geothermal energy.

Review Figure 12.16 on cell cycle control. Would you expect MPF (maturation-promoting factor) activity to remain steady during cleavage? Explain.

What type of loop, such as counter-control or sentinel-control, will you use in each of the following situations? a. Sum the following series: 1 + (2 / 1) + (3 / 2) + (4 / 3) + (5 / 4)+ ... + (10 / 9) b. Sum the following numbers, except the last number: 17, 32, 62, 48, 58, -1 c. A file contains an employee’s salary. Update the employee’s salary.