Q1: Explain under what circumstances eddy currents occur, and what is their direction.

Q2: Explain how magnetic braking works.

Q3: Define magnetic flux. What, if anything is flowing?

Q4: Accurately describe Lenz's rule and give an example.

Q5: If a MRI experiences the current breakdown over a period of 0.2 seconds, meaning, the magnetic field drops from 3 T to 0, what currents can one expect in patient's body? Cf. Example 30.9

Course: Soil mechanics
Theme: Fellenius Method
There is a soil with the following characteristics: cohesion of 0.4 kg / cm2, friction angle 33 ° and dry density of 1.7 gr / cm3 and when saturated, effective cohesion of 0.2 kg / cm2, effective friction angle of 24 °. and a saturated density of 2.2 gr / cm3. The slope under evaluation has a 38 ° inclination, the rocky layer is 11 meters away, finding the stability of the slope in a dry and saturated condition, in addition to evaluating the critical height.

Ii the image, a toroidal solenoid is made of 100 turns of loops. The cross section of this solenoid is a square with sides of 2(mm). The radius of the solenoid circle is r= 2(cm).A- Calculate the self-inductance of this toroidal solenoid.B- If this solenoid is conneted with a 100 (Ω) rsesitor in series to a DC power supply, what is time conatnt of this RL circuit?C- When the current reaches the maximum value of , a magnetic energy of 0.2 (J) is stored in the ??solenoid. What is the volatge of power supply?

The isoelectric point (pI) of a peptide is the pH at which the peptide does not migrate in an electric field. Since the peptide is zwitterionic, there are the same number of positive charges as negative charges on the peptide population. The pI can be estimated fairly accurately (within 0.1 or 0.2 pH units) from the pK values of all the proton dissociable groups in the peptide. Using pK values from the table at the right, estimate the pI value of the following hexapeptide: Gly-His-Glu-Lys-Phe-Cys

Sampling 2 periods of each signal in (below) with 100 samples and plot the signal with respect to the same frequency reference signal cos(ω₀t):

a.x_a(t)=50sin(100t+0.2)

b.x_b(t)=25cos(5000t−π/4)

c.x_c(t)=50sin(1000t+ π/4)−20cos(1000t−0.5)

d.x_d(t)=30sin(3000(t−5×10⁻⁵))

e.x_e(t)=25cos(5000t−2.25π)

f.x_f(t)=−25cos(5000t+3π/4)

You go out to the barn and start up the egg collecting machine. Eggs slide down a 30 degree ramp with a coefficient of kinetic friction of 0.2. What is the acceleration of the egg as it moves down the ramp?

If the ramp is two meters long, how fast are the eggs moving when they hit the bottom?

If we assume that the eggs are spherical with a radius of 3 cm, mass 200 grams and roll down the ramp instead of sliding, now recalculate how fast they are moving when they reach the bottom.

Venom production in your rattlesnake population has a phenotypic mean of 400 mg, a phenotypic standard deviation of 36 mg, and a narrow-sense heritability of 0.25. The mean generation interval is 2 years. If you perform phenotypic selection by culling the bottom 10% of individuals each generation (i = 0.2), approximately how many years will it take for your population to reach a phenotypic mean of 450 mg?

Explain how 56 is the correct amount of years to reach a mean of 450mg

Sudi spends his income on two goods. His income elasticity of demand for the first good is ~1 = 0.2, while his income elasticity of demand for the second good is ~ 1 = 2. Illustrate in one diagram how a 10% increase in his income would affect the quantity he demands of the two goods that shows an incomeconsumption curve, and create another diagram for each of the two goods that shows an Engel curve. How do the slopes of the Engel curves compare?

You have a portfolio with a standard deviation of

25%

and an expected return of

17%.

You are considering adding one of the two stocks in the following table. If after adding the stock you will have

30%

of your money in the new stock and

70%

of your money in your existing​ portfolio, which one should you​ add?

Standard deviation of the portfolio with stock A is

Consider the following information on Stocks A, B, C and their returns (in decimals) in each state: State Prob. of State A B C Boom 20% 0.33 0.2 0.14 Good 45% 0.13 0.12 0.07 Poor 25% 0.02 0.01 0.03 Bust 10% -0.09 -0.04 -0.02 If your portfolio is invested 25% in A, 40% in B, and 35% in C, what is the standard deviation of the portfolio in percent? Answer to two decimals, carry intermediate calcs. to at least four decimals.