A Small Styrofoam Ball of Mass 0

question 48

Multiple Choice

A small styrofoam ball of mass 0.120 g is placed in an electric field of 6000 N/C pointing downward.What excess charge must be placed on the ball for it to remain suspended in the field?

• A)-16.0 nC
• B)-18.0 nC
• C)-57.2 nC
• D)-125 nC
• E)-196 nC

---

Definitions:

Interest Rates

The price paid for borrowing money, usually expressed as a percentage rate over a period of one year.

Balance Of Trade

The difference between imports from and exports to another country. If imports are larger a trade deficit exists. If exports are larger there is a trade surplus.

Investing Activities

Transactions and events related to the acquisition and disposal of long-term assets and investments, reported in the cash flow statement.

Hedging

A maneuver or contract that eliminates risk from a transaction. In international trade, eliminating exchange rate risk by purchasing a forward contract for delivery of foreign exchange at a specified rate at a specified time.