A slow leak from an underground storage tank has contaminated both the soil and the groundwater as shown below. Soil contaminated  above the groundwater table (in the shape of a rectangular prism):  Volume: 30 m3                     Soil density:  1800 Kg/m3                    Porosity:  0.3                    Contaminant concentration:    850 mg/Kg Soil contaminated below the groundwater table (note: groundwater plume is in the shape of a cone): Volume:   2500 m3                     Porosity:  0.3                              Contaminant concentration in groundwater:  3500 mg/L Note: 1 m3 = 1000 L Amount of contaminant present in the groundwater is most nearly (Kg):

The potency factor for chloroform is 6.1×10-3 (mg/kg-d)-1. The CDI  of chloroform for a person was estimated as:  0.01mg/kg-day What is the cancer risk for this person?

The hydraulic conductivity of soil is measured as 2.5×10-2  cm/sec.  After an accident, a truck carrying dissolved salt solution releases its contents to the surface.  The distance between the spill and a groundwater well is 2600 meters.  The groundwater elevation at the spill location is 6.5 meters, and the well location is 5.2 meters. Porosity of soil is 0.3.     Travel time of contaminant to the well is most nearly (years):

An object with a mass of 6 kg is initially at rest at the top of a frictionless inclined plane that rises at 80° above the horizontal. At the top, the object is initially 3.0 m high from the floor, as shown in the figure. When the object is released from this position, it eventually stops at a distance d from the bottom of the inclined plane along a horizontal surface, as shown. The coefficient of static and kinetic friction between the horizontal surface and the object is 0.6 and 0.2, respectively, and air resistance is negligible. Find the distance d. 

PART THREE – Analytic Essay: Choose ONE topic from the following options and write an essay of approximately 300-500 words, slightly more is ok). Use specific details and examples in your answer. (30 points) Compare and contrast two of the wars of the 20th You may choose from the following: World War One, World War Two, Korean War, Vietnam War, Gulf War. Explain what social, political, and legislative measures helped to recover the economy from the Great Depression from the 1930s through the 1950s.

BONUS EXTRA CREDIT: Complete up to 3 additional IDs to earn up to 15 additional points. Booker T Washington Iran-Contra Affair Neutrality Acts Harlem Renaissance Cuban Missile Crisis Sacco and Vanzetti Hoovervilles Zimmerman Telegram Roe v. Wade Oklahoma City Bombing Voyage of the St. Louis Ida B Wells Tulsa Race Massacre NAFTA The Great Migration Vietnamization Freedom Rides Korematsu v. US Huey Long The Liberal Consensus Black Panther Party The League of Nations Yalta Conference The Winning Plan The Plumbers The Great Society New Look Strategy Stonewall Uprising Truman Doctrine Alice Paul The Pentagon Papers Anita Hill Double V Campaign César Chávez Reaganomics 18th Amendment Julius and Ethel Rosenberg Spillover Wars Anti-Drug Abuse Acts 70s Energy Crisis USS Cole Kent State W.E.B. Du Bois Levittown Soviet Détente Little Rock Nine Marsha P Johnson Strategic Defense Initiative Americans with Disabilities Act Scopes Trial

A high-voltage powerline operates at 500 000-V rms and carries an rms current of 500 A. If the resistance of the cable is 0.050 Ω/km, what is the resistive power loss in 200 km of the powerline? Report your answer in MW (mega watts).

At what frequency will a 12-μF capacitor have a reactance XC = 300 Ω? Report your answer in Hz(Recall the difference between angular frequency and frequency)

An RLC series circuit has R = 100 ohms, C = 25 μF, and L = 0.16 H. For what angular frequency of an AC voltage is the current flow maximum? Report your answer in rad/s

The switch in the figure is closed at t = 0 when the current I is zero. When I = 15 mA, what is the potential difference across the inductor? rl_1.png