Dr. Ray is hanging Halloween decorations around her home with a new type of super-stretchy elastic string with a Young’s modulus of 121 kPa. When she hangs a 20-gram ornament from it, the total length of the string is 10 cm, and when she hangs a 27-gram ornament from it, the total length of the string is 11.5 cm. What is the original length of the string in centimeters?

Explain the purpose of heat-fixing a bacterial smear. (2 pts.)

What does the turbidity of this nutrient broth culture indicate?

A) What is this particular agar plate used to identify? (1 pt.) B) What is the result of this plate, and what does this result mean? (2 pts.)

For diffusion to occur, there must be:

Market failure describes a situation in which the market itself ______________ in a way that balances social costs and benefits. 

A positive externality arises from a situation where a third party, outside the transaction:

Property rights are the legal rights of ownership to which other are:

The objective of imposing a higher pollution tax is to:

Insurance companies face the problem of ________ when people with highest probability of getting the insurance payoffs are the ones who purchase insurance.