Energy in capacitors: Equal but opposite charges Q are placed on the square plates of an air-filled parallel-plate capacitor. The plates are then pulled apart to twice their original separation, which is small compared to the dimensions of the plates. Which of the following statements about this capacitor are true? (There may be more than one correct choice.)

Spheres of charge: A nonconducting sphere contains positive charge distributed uniformly throughout its volume. Which statements about the potential due to this sphere are true? All potentials are measured relative to infinity. (There may be more than one correct choice.)

You borrow $7,000 today for home repairs. If the interest rate is 12% (APR) compounded monthly, and the loan is for four years, then what would your monthly payment be if the first payment is to be made one month from now?

If the daily sales outstanding of Wu Systems is 50 then what must Wu Systems’ annual sales have been in this year?

You have $25,000 in a brokerage account now, and you plan to deposit an additional $10,000 at the end of every future year, starting one year from today, and your goal is to accumulate $900,000 in 30 years. What annual interest rate (APR) must you earn for this to occur?

How much net operating capital does Wu Systems have?

You have $25,000 in a brokerage account now, and you plan to deposit an additional $10,000 at the end of every future year, starting one year from today, and your goal is to accumulate $900,000 in 20 years. What annual interest rate (APR) must you earn for this to occur?

In which of these markets would the prices of financial assets be LEAST efficient?

You deposit $100 into an account today. It will grow at 9% (APR) compounded annually. What will this sum be worth in 60 years?

In which of these markets would the prices of financial assets be MOST efficient?