As inventor claims that there is a steady flow device which can process an ideal gas at constant temperature and pressure and produce useful work. Would you believe this claim??

As a facilities supervisor, you would like to be able to estimate maintenance costs using machine hours as the cost driver. To do this, you perform a linear regression with machine hours as the independent (X) variable, and maintenance costs as the dependent (Y) variable. This results in the following output:

A. What percentage of the variation in maintenance costs can be explained by machine hours?

B. How much maintenance cost should we expect if a factory has zero (0) machine hours?

C. By how much should we estimate maintenance costs to increase for every one hour increase in machine hours?

Label and place your final answer for A-C.

"Free Trade Can Lift Labor Standards Abroad" By Layna Mosley and"Everything We Knew About Sweatshops Was Wrong." By Christopher Blattman and Stefan can you please share what you thInk of these article? Also can you tell me which article is more convincing?

1. Express 2.5M NaCl as a percent solution.

What is the molar concentration of a 10% NaCl solution?

2. from a 1M Tris solution, how is a 400ml of 0.2M Tris is prepared?

3. What is the molarity of a solution of sucrose that has a density of 1.24 g/ml and a molecular weight of 342.3 g/mol.

4. Forty micoliters of a stock solution of RNA is diluted with water to give a final volume of 1000 microliters. The diluted sample has an absorbance at 260nm of 0.142. What is the concentration of the concerntration of the RNA stock solution in micro grams/milliliter.

5. from a small culture, you have purified the DNA of a rocombinant plasmid. You have resuspended the DNA in a volume of 50 microliter. You dilute 20 of the purified DNA sample into a total volume of 1000 microliter distilled water. You measre the absorbance of this diluted sample at 260 nm and 280 nm and obtain the following readings.

A260=0.550

A280=0.324

a. What is the DNA concentration of the 50microliter plasmid prep?

b. How much total DNA was purified by the plasmid preparation?

c. What is the A260/A280 ratio of the purified DNA?

Use the bond D and S curves graphs to explain the effect on interest rates of events such as a rise in expected inflation, a fall in expected inflation, a larger budget deficit.

a) Balance the following molecular equations for these reactions.
b) write the ionic equation for the reactions.
c)write the net ionic equation for the reactions.

a) La2(CO3)3 (s) + HCl (aq) --> LaCl3 (aq) + CO2 (g) + H2O (l)

b) K2S2 (aq) + Bi(NO3)3 --> Bi2(S2)3 (s) + KNO3 (aq)

1. Explain in your own words why regulation is important. I would like you to use 2 examples, one from human communities and one from the human body in your explanation. Make sure to include how regulation is enabled in each case (i.e. how is communication occurring?).

I will give you an example, so that you know what I am looking for. When you drive a car and approach an intersection, you will receive a signal (communication) that tells you if it is okay to proceed or you must stop. At a lighted intersection, we all know that green means go and red means stop. If you ignore the signal or if there is no signal, cars would be crashing into each other and people could be injured or die. If there was no regulation of intersections throughout a city, chaos would ensue. Here is an interesting thing to consider in this situation: if you were unable to tell red from green (red/green colorblindness) and the red and green lights were randomly placed in the vertical sequence on the semaphore, imagine how confusing the incoming information could be!

For your example of regulation in the human body, describe what would happen if the receiving cell couldn't appropriately receive a signal or the sending cell couldn't appropriately send a signal. These problems lead to disease/homeostatic imbalance.

2. In order for an effector to respond to a command via either of the endocrine or nervous system, it must be able to respond to a chemical (hormone or neurotransmitter). Explain how the effector is able to respond to these chemical signals (i.e. what must it have either in its membrane or inside its cells). Describe how this process of intercellular communication exemplifies the relationship between structure and function.

Consider the following Galvanic Cell : Al (s) | Al ⁺³ (0.010M) || Fe ⁺²(0.10M) | Fe(s) where,

Al⁺³ + 3e > Al(s) E = -1.662 V

Fe⁺² + 2e > Fe (s) E -.440 V

A. What is potential of the above voltaic cell at 25C ?
B.) Calculate Delta G of the above cell at 25C ?

regardless if weather it is neutral or hormonal pathway the target cell must have the appropriate

What is a conductor? How is the conductivity relatd to resistance? How does conductivity of a regular conductor (like a copper wire) change with temperature? Why? (Hint: think about how electrons collide with vibrating atoms.) (please write the answer clear and with a good handwriting thanks!)

Calculate [OH ^-] and pH for each of the following solutions.



(a) 0.0062 M LiOH

(b) 0.0431 g of LiOH in 480.0 mL of solution

(c) 13.7 mL of 0.00220 M Sr(OH)₂ diluted to 600 mL

(d) A solution formed by mixing 15.0 mL of 0.000560 M Sr(OH)₂ with 89.0 mL of 1.2 x 10^-3 M LiOH