eBook Almost all U.S. light-rail systems use electric cars that run on tracks built at street level. The Federal Transit Administration claims light-rail is one of the safest modes of travel, with an accident rate of .99 accidents per million passenger miles as compared to 2.29 for buses. The following data show the miles of track and the weekday ridership in thousands of passengers for six light-rail systems.

An individual has $25,000 invested in a stock with a beta of 0.3 and another $40,000 invested in a stock with a beta of 1.4. If these are the only two investments in her portfolio, what is her portfolio's beta? Do not round intermediate calculations. Round your answer to two decimal places.

An individual has $50,000 invested in a stock with a beta of 0.3 and another $40,000 invested in a stock with a beta of 2.5. If these are the only two investments in her portfolio, what is her portfolio's beta? Round your answer to two decimal places.

Suppose we know that the income elasticity of demand for beer in cans in –0.3. If consumers’ incomes go up by 20%, what would be the change in the demand for beer? (Provide the formula and your calculations.)

1) A circle with a radius of 0.3 meters is placed in the x-y plane in a magnetic field directed in the -z direction. It is wound once and its resistance is 6 Ohms. The initial magnetic field is 0.8 Tesla. The magnetic field is then changed in 0.6 s and the average induced current is 0.04 amps running counter-clockwise. First, find the final magnetic field to needed to induce this average current.

Then, the magnetic field (still in the -z direction) is held constant at the value of the final magnetic field that was just found. Then, the wire is reshaped into a square that is wound once in a time of 0.003 seconds. If the resistance does not change, what is the average induced current, in amps, when the wire changes shape? If it's clockwise include a negative sign.

If 0.10 g of benzene (C6H6) is ignited in a 0.3 L vessel at 298K and surrounded by 25 atm of oxygen: a) Write the net reaction; b) How many moles of O2 were consumed?; c) How many moles of product were produced?; d) What is the change in moles in the reaction vessel?; e) Assuming all of the products were ideal gas what is the new pressure in the container?; f) What is the work done by this reaction?; g) If one of the products is a liquid what would be the change in pressure. Assuming the volume of liquid is very small compared to gas, how much work was done by this system? PLEASE SHOW ALL WORK! thank you.

What A laminated steel (E = 200 GPa and ? = 0.3) cylinder consists of a jacket with an inside diameter of 200 mm and an outside diameter of 300 mm shrunk onto a tube with an inside diameter of 100 mm. The initial shrinkage pressure is 25 MPa.
Determine:

a. The maximum tensile stress in the cylinder after it is fabricated subject to an internal pressure of 200 MPa.

b. What and where is the maximum shear stress?

1) A circle with a radius of 0.3 meters is placed in the x-y plane in a magnetic field directed in the -z direction. It is wound once and its resistance is 7 Ohms. The initial magnetic field is 0.6 Tesla. The magnetic field is then changed in 0.7 s and the average induced current is 0.05 amps running counter-clockwise. First, find the final magnetic field to needed to induce this average current.

Then, the magnetic field (still in the -z direction) is held constant at the value of the final magnetic field that was just found. Then, the wire is reshaped into a square that is wound once in a time of 0.006 seconds. If the resistance does not change, what is the average induced current, in amps, when the wire changes shape? If it's clockwise include a negative sign.