In a model AC generator, a 497 turn rectangular coil 14.0 cm by 23 cm rotates at 115 rev/min in a uniform magnetic field of 0.58 T.

(a) What is the maximum emf induced in the coil?
V

(b) What is the instantaneous value of the emf in the coil at t = (?/39) s? Assume that the emf is zero at t = 0.
V

(c) What is the smallest value of t for which the emf will have its maximum value?
s

two skaters collide and embrace, in a completely inelastic collision. boomer, whose mass is 83 kg, is originally moving east with v=6.2km/hr. sooner whose. mass is 55kg, is originally moving north with v=7.8km/hr. (a) what is the velocity of the couple after impact? (b) what is the velocity of the center of mass of two skaters before and aafter collision? (c) what is the fractional change in the Kinect energy of the skaters because of the collision?

17. a. (2 pts) When discussing prokaryotic gene regulation, define the term constitutive:

______________________________________________________________________________

b. (2 pts) Which of the following partial diploids is constitutive? As a reminder a partial diploid contains two copies of the genes shown below. The genes before the slash are on the bacterial chromosome. The genes after the slash are on a plasmid.

a. lacI⁺ lacO⁺ lacZ⁺/lacI⁺ lacO⁺ lacZ⁺     b. lacI^- lacO⁺ lacZ⁺/lacI⁺ lacO⁺ lacZ+      

c.lacI⁺ lacO^c lacZ⁺/lacI⁺ lacO⁺ lacZ⁺   d. lacI^s lacO⁺ lacZ⁺/lacI⁺ lacO⁺ lacZ⁺

19. (6 pts) Outline the differences between these three bacterial strains (one or two sentences)

F – strain ________________________________________________________________

F + strain _________________________________________________________________

Hfr strain__________________________________________________________________

20 a. (2 pts) Which of the above strains can donate genes to another bacterium? _____ and ______.

b. (1 pt) Which of the above is the recipient in a conjugation gene-mapping experiment? ______.

c. (1 pt) Name of structure formed during conjugation which permits transfer of genetic information? _______.

22. a. (4 pts) In 1 or 2 sentences define transformation in bacteria __________________________

________________________________________________________________________________

b. (2 pts) Most laboratory bacterial strains cannot naturally undergo transformation. Term for bacterial strain which through heat-shock/other method is rendered able to undergo transformation _________

Which of the following is true? An undervalued fixed rate currency encourages inflation in that country An overvalued currency is a sign of a trade surplus for that country An undervalued currency is a sign of an excess supply of that currency An overvalued currency increases a country’s exports

A US corporation has a CNY1,000,000 account payable due in 6 months. To hedge its currency risk your company enters into an NDF contract. The current spot rate is CNY7.15/$, the NDF contract rate is CNY7.00/$, and the spot rate 6 months from today is CNY7.25/$

Your company pays $1,929.11

Your company pays $4,926.11

Your company receives $1,929.11

Your company receives $4,926.11

Which of the following transactions is/are in the US BOP account?

I.)    A Chinese company buys US Treasury securities from a broker/dealer in Sydney, Australia.

II.)  An Italian family flies United Airlines to New York.

III.)  A US investment bank buys a German stock from a US insurance company.

IV.) A Spanish mutual fund sells a Chinese company’s stock to a NY investment bank.

V.)  A US company sells a factory in Malaysia to a Chinese bank.

II and V

I and II

II, IV, and V

III and V

A resistor R = 475 Ohm and an inductor of L = 1.4 H are used in and RL circuit to control the timing of some device. What time constant does this device exhibit?

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Question

A long wire carries a steady current of I = 5.5 A. What is the strength of the magnetic field 5.5 cm away from the wire?

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Question

An ideal step up transformer changes 12.5 V in the primary to 118 V in the secondary. How much current is in the secondary if there is 0.475 A in the primary?

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Question

A 400. turn solenoid, 24 cm long, has a diameter 2.2 cm. A 12-turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases by 3.5 A/s, what will be the induced emf in the short coil?

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Suppose a country has a money demand function (??)?=?? where k is a constant parameter. The money supply grows by 12 percent per year, and real income grows by 4 percent per year.

a. What is the average inflation rate?

b. If real income growth were higher, inflation would be

c. What is the relationship between the parameter k and the velocity of money?

There is no relationship between k and V because the amount of money people hold is not related to the velocity of money.

?=1?V=1k: k is inversely related to velocity because the more money people hold for a given real income, the smaller velocity is, and vice versa.

?=????V=kPYM: k times the ratio of nominal output to the money supply is related to velocity because the more money people hold, the larger velocity is, and vice versa.

?=?V=k: k is directly related to velocity because the more money people hold for a givne real income, the larger velocity is, and vice versa.

d. Suppose, instead of a constant money demand function, the velocity of money in this economy was growing steadily because of financial innovation. Assuming everything else was unchanged, how would that affect the inflation rate?

2. Which of the following pairs of reactants will result in a spontaneous reaction at 25°C. (select all that are spontaneous)

3.

Order the following in order of increasing reducing agent strength (1=weakest; 4=strongest)

: