So, we did a Beer's Law lab and I am trying to find out how to find the concentrations to make the absorbace vs concentration graph. Say the path length is 1.0 cm, how do you find the molar absorbtivity (in order to get the concentrations with A = epsilon * path length * concentration)? I think there is a way to get the molar absorbtivity from the wavelength vs absorbance graph but I'm not sure how.

Our data is below for the wavelength vs absorbance:

400 - 0.46

450 - 0.73

500 - 1.01

550 - 1.09

600 - 0.78

650 - 0.54

700 - 0.23

The value of K_m for the shown data for a hexokinase-catalyzed reaction is [Blank] with the unit of [Blank] The value of V_max for the same reaction is [Blank] with the unit of [Blank] Be sure to give the values with the correct number of significant figures. You might have to construct a kinetic plot. For units, choose one answer from (μM, 1/μM, μM/second, μM x second, mM, 1/mM, second, 1/second, mM/second, mM x second)

A portfolio manager is holding the following investments:

The manager plans to sell his holdings of Stock Y. The money from the sale will be used to purchase another $15 million of Stock X and another $5 million of Stock Z. The risk-free rate is 5% and the market risk premium is 5.5%. How many percentage points higher will the required return on the portfolio be after he completes this transaction?

Company a & b require $50 million for a 3 year period. To reduce their financing needs, Company A would like to borrow at a fixed rate, whereas Company B would prefer to borrow at a floating rate. The cost to each party of accessing either the fixed or floating rates for a 3 year debt issue is as follows:

Set up an interest rate swap. Both companies share equally from the interest rate differential with the investment bank keeping 0.10%.

In 1783, the French physicist Jacques Charles supervised and took part in the first human flight in a hydrogen balloon. Such balloons rely on the low density of hydrogen relative to air for their buoyancy. In Charles’s balloon ascent, the hydrogen was produced (together with iron(II) sulfate) from the reaction of aqueous sulfuric acid on iron filings. (a) Write a balanced chemical equation for this reaction. (b) What volume of hydrogen is produced at 300 K and a pressure of 1.0 atm when 300 kg sulfuric acid is consumed in this reaction? (c) What would be the radius of a spherical balloon filled by the gas in part (b)?

1. Imagine that the psychology department wants to consult you on a project designed to measure how students’ expectations for the difficulty of Intro to Psychology class actually influences their final grade. The department randomly selects 50 Intro students at the beginning of the semester and asks them, “What grade do you expect to get in Intro to Psychology this semester?” Below are the numbers students reported for their expected grade.

Note: A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0

Expected grades: 0,0,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4

Using the data above, construct a simple frequency distribution, a relative frequency, cumulative frequency and a percentile

Your manager wants you to design a new superinsulated hot-water heater for the residential market. A coil of Nichrome wire is to be used as the heating element. Calculate the length of wire required. (The water heater is cylindrical in shape, and is completely filled with water. Let the diameter of the water heater be 50 cm and its height 0.8 m. The coil of Nichrome wire is located inside the water heater, in contact with the water. Assume that the diameter of the Nichrome wire is 2.0 mm and that the water, initially at 20°C, is to be heated to 77°C in 1.0 h. Let the voltage used by the water heater be 120 V.)

A theme ride vehicle is moving uphill at a constant speed. The slope of the hill is 10○. The mass of the vehicle plus the riders is 2000 kg. The vehicle is powered by a WLIM (Wheeled Linear Induction Motor). The pole pitch of the motor is 0.5m. The friction coefficient of the surface is 0.01. The primary circuit resistance R1 is 0.5 Ω, and the secondary resistance referred to the primary circuit R2’ is 1.0 Ω. The equivalent inductance of the secondary circuits is 0.01H. The line-to-line voltage of the primary windings of the motor is 480V, and its frequency is 15 Hz. Assume that the drag force is 500N. Compute the speed of the vehicle.

1. At high noon, a sinusoidal electromagnetic wave is heading straight toward San Diego. At a 12:00 sharp, the electric field at a certain location is 700 N/C directed South. a) What is the magnitude and direction of the magnetic field at this location at this instant? b) If it takes 1.0 x 10^-15 seconds for the fields at this location to return to the values described above, what is the wavelength of this wave? c) Does this wave fall within the visible range? d) At what rate does this wave deliver energy to a patch of Earth of area 2 m², assuming all is absorbed?