The  management of a large store wishes to add a fenced-in rectangular storage yard of 20,000 ft2 , using the building as one side of the yard.    Find the minimum amount of fencing that must be used to enclose the remaining three sides of the yard.   (Don’t forget to prove that it is a minimum!)       You MUST show ALL work/steps to get credit!    (Don’t type anything in this box)

 Which of the following statements would Darwin have disagreed with?

A hybrid zone is properly defined as

Which type of nuclear process requires an extremely high temperature (millions of degrees)?

C4H10 exists in two forms. Which of the following statements about these two forms is false?                       

A 20 kg mass is placed 0.75 m on the left side from the pivot of a 4 m long beam. Another mass of 30 kg is placed on the right side of the beam at distance 1.5 m from the pivot. If the beam is balanced by placing a third mass on the left side at distance 1.5 m, what is the mass?

Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of [x] amu. Calculate the binding energy per atom in MeV.   1 amu= 931.5 MeV.   Mass of a proton is 1.007825 amu while mass of a neutron is 1.008655 amu. Enter a positive number to 1 decimal place.

What are the tasks and activities you need and want to do, rank ordered from most important to least important?

When Jenna helped her mother clean up after her baby brother, Jenna’s mother praised her daughter for being so thoughtful. For Jenna, her mother’s praise is serving as

Would a 0.1 M solution of the salt NH4CN be acidic, basic or neutral?   Kb of NH3= 1.8 × 10-5 and Ka of HCN = 4.9 × 10-10.  Explain your answer with appropriate Ka and Kb calculations.  No need to calculate the actual pH of the salt unless you want to prove to yourself. Show your work either here or on the scratch sheet and upload under Exam III work.  No need to do both places.