Matt is giving a presentation to his class about transformers. For one example he makes the following analysis: “The ratio of windings in this transformer from the primary circuit to the secondary circuit are 2:25. This makes it a step-up transformer. Since the voltage in the primary circuit is 10.0 V, the voltage in the secondary circuit will be (10.0 V)(25/2) = 125 V. The current in the primary circuit is 4.00 A, so the current in the secondary circuit will be (4.00 A)(25/2) = 50.0 A.” Is Matt’s analysis correct? If not, identify the mistake he made and correct it.

Draw two diagrams showing the direction of current induced in a coil both when a magnet moves toward the coil and when the magnet moves away. Use these to explain Lenz’s law and why the current is in the directions indicated.

thank you

1.include working in your answers

1a) If a long wire is carrying a current of 5.5 A, how far away from the wire would the magnet field strength be 1.0E-5 T?

1b) A transformer is used to step down from the New Zealand mains voltage of 230 V to 110 V for use with an electric razor from the USA. (i) If the razor draws a current of 0.25 A what current (at least) is drawn from the 230 V line? (ii) What is the ratio of the loops in the primary and secondary coils of the transformer?

1c) A ball is dropped from a height of 2.2 m in a train travelling at 25 m/s and accelerating at 1 m/s2 . How far will the ball miss the spot directly below where it was dropped?

7. An electric heater is rated at 1000 W, a toaster is rated at 1500 W, and an electric grill is rated at 2000 W. The three appliances are connected in parallel to a common 120 V circuit. (a) How much current does each appliance draw? (b) Is a 30 A circuit breaker sufficient in this situation?

8. (a) A 4 µF capacitor is connected to a 5 V battery.

(i) How much charge is stored on its plates when it is fully charged?

(ii) How much energy is stored by it when it is fully charged?

b) Three capacitors with capacitances, C1 = 1 F, C2 = 2 F, and C3 = 3 F, are connected to a 5-V source. What is the effective capacitance when the capacitors are connected in (i) series, (ii) parallel

For both resistances, plot the discharge curve of ln(V/V0) vs. time. From the slope of the line, calculate C (capacity). Please explain in detail how to plot/determine some of the values of ln(V/V0), how to determine the slope of the graph, and if possible demonstrate using Excel. Thank you.

Suppose that the utility you receive from buying vegetables (V) and medicine (M) are given by: ???????(?, ?) = 4? ^0.8?^0.2)

a) What is your marginal utility of vegetables and medicine?

b) What is your marginal rate of substitution (vegetables as x good and medicine as y good) between the two?

c) If the price of vegetables is $20, the price of medicine is $15, and income is $120, what is your optimal consumption of V and M? Graphically show your answer.

d) If we start to tax medicine, increasing the price to $20, solve for your new optimal consumption of V and M . Given this utility function, how is your answer “predictable” based on your answer to c?

e) How much utility to you generate from the optimal bundles found in parts (c) and (d)?

1. According to the court, why did Baer lose in Baer v. Chase? If you could go back in time and represent Baer in his dealings with Chase, how would you change things to make sure an enforceable contract was made? Be specific.

2. According to the court, what did Netscape do wrong in failing to make an enforceable clickwrap agreement with Specht in Specht v. Netscape Communications Corporation? Does this ruling mean that no clickwrap agreement can ever create a binding contract? Why or why not? Explain how internet companies (like Apple, Microsoft and Google) structure their contracts, or terms of use agreements, to avoid the "Netscape" problem.

3. Briefly explain the facts of Soldau v. Organon, Inc. Why did the court find in favor of Organon? Explain.

For both resistances, plot the charge curve of ln(1-V/V0) vs. time. From the slope of the line, calculate the C (capacity). Please demonstrate in detail how to figure out some of the points of ln(1-V/V0), how to determine the slope of the graph, and how to plot graph in Excel if possible. Thank you.

1. a) The star μ Cephei has an apparent magnitude of +4.73 in the V-band. How many times brighter is its apparent brightness in the V-band than in the B-band if its B-V color index is +2.35?

b) Explain how μ Cephei’s apparent R-band magnitude of +1.98 demon- strates why this star is also known as the Crimson Star.

c) Given that μ Cephei has a luminosity of 3.7 · 105L⊙, estimate this star’s absolute magnitude given its distance of approximately 1800 pc. As- sume that the Sun has an absolute bolometric magnitude of +4.83.

d) μ Cephei also has a surface temperature of 3690 K, estimate its radius. If it were placed inside the Solar System, which planets would be orbitting inside of it?

Week 12 Assignment Personality disorders. You should also view the 3 videos on Clusters A, B, and C Personality Disorders. Based on what you learned from these materials, create a case study of a client who has one of the 10 personality disorder. In your case study, explain the following: 1. State and describe which personality disorder you selected. Which cluster? 2. Describe the main symptoms of your selected personality disorder. (e.g., behaviors, conflicts and other interpersonal issues and etc). 3. Describe some treatment options for people with this disorder. How will you, as the therapist, work with this person?

this is the video link :

http://www.youtube.com/watch?v=9BqaHfJI1Z

http://www.youtube.com/watch?v=2XZ9cLJd5Gc

http://www.youtube.com/watch?v=_n2YUhNg41M