2. A source of radioactivity was measured to have 40, 14, 5.5, 2, and 0.6 d/m...

2. A source of radioactivity was measured to have 40, 14, 5.5, 2, and 0.6 d/m at 8-min intervals. Use a plot of the data to determine the half-life of the radionuclide in the source

3. An isotope of fission is Sm^151, with a half-life of 90 y. How long will it take 0.05 g to decay to 0.01 g?

Expert Solution

genius_generous answered 2 years ago

2. Let D be a relation on the natural numbers N deﬁned by D = {(m,n)...

2. Let D be a relation on the natural numbers N deﬁned by D = {(m,n) : m | n} (i.e., D(m,n) is true when n is divisible by m. For this problem, you’ll be proving that D is a partial order. This means that you’ll need to prove that it is reﬂexive, anti-symmetric, and transitive. (a) Prove that D is reﬂexive. (Yes, you already did this problem on one of the minihomework assignments. You don’t have to redo the...

14) Outline the dispersion of nanoparticles in nanocomposites filled with 2-D nanoparticles. In short

The specific rotation, [α]D, for (-)-2-butanol is +14. What is the observed rotation for a solution...

The specific rotation, [α]D, for (-)-2-butanol is +14. What is the observed rotation for a solution of 1.0 g of (-)-2-butanol in 10 mL of water in a sample tube having a pathlength of 10 cm? ??????degrees . The observed rotation of a solution of 1.5 g of a compound in 10 mL of water is +3.4 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound? .

2. A markets demand function is given by D(p) = 40 -.5P, and the market supply...

2. A markets demand function is given by D(p) = 40 -.5P, and the market supply function is given by S(P) = (1/3)P - 10. a. Draw the demand and supply curves, and calculate and label the market price and quantity on the graph. b. Calculate and label the consumer surplus and the producer surplus. c. If the government imposes a $10 per unit tax on producers, draw the old and new demand and supply curves. d. Calculate the new...

extra credit1 A 2-source dipole system has two in-phase sound sources located at (0, d/2) and...

extra credit1 A 2-source dipole system has two in-phase sound sources located at (0, d/2) and (0, -d/2). Given a sound detector using displacement pressure detection principle, basically a force vector measurement perpendicular to the propagation wave vector of a single sound source, find the total signal intensity expression as a function of distance along the x-axis at large distances, >> wavelength, >> d, when a 1-source system would generate displacement (b/r)sin(k(r - vt)) . Use the binomial expansion to find...

2) A racecar is driving at 40 m/s when a rabbit 100 m away runs across...

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a power plant treats 2 ML/d of feedwater to remove total organic carbon (TOC). The source...

a power plant treats 2 ML/d of feedwater to remove total organic carbon (TOC). The source water contains 30 mg/L of TOC. The treatment system consists of a square coagulation and flocculation tank that with a removal efficiency of 30% TOC (because organic matter sticks to floc). The coagulation tank is followed by a long (20 m), narrow(2 m) ozonation channel of 100,000 L with TOC degradation rate of 1.73/hour by reaction with ozone. What is the TOC concentration at...

2. Does a source of evidence have to be unbiased to be considered credible? Give an...

2. Does a source of evidence have to be unbiased to be considered credible? Give an example to support?

An object of mass m=4.00 kg is acted on by a 2-D force of the form:...

An object of mass m=4.00 kg is acted on by a 2-D force of the form: F=C(x^2y^2,xy^3), where the coordinates are given in meters and the constant C=62.4 N/m^4. a.) calculate the work that F does on an object if it moves from the origin to the point (2,2) along a straight line path (the shortest possible path). b.) calculate the work that F does on the object if it moves between the two same points, but along a different...

A.The area of the primary coil (the current source) is 3*10^-4 m^2. The period for the...

A.The area of the primary coil (the current source) is 3*10^-4 m^2. The period for the AC power current oscillation is 1.6*10^-2 seconds, thus, the voltage goes from zero to the root mean square voltage in 0.4*10^-2 seconds. Calculate the root mean square voltage of the AC power supply B.What is the root mean square voltage for the secondary coil (pickup coil) if there is one loop for the primary coil (current source coil) and one loop for the secondary...

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