1. an inflated rubber balloon is rubbed with a wool cloth until an excess of a b
ID: 1654453 • Letter: 1
Question
1. an inflated rubber balloon is rubbed with a wool cloth until an excess of a billion electrons is on the balloon what is the magnitude of the charge on the balloon
2. What is the magnitude of the the least possible current that could theoretically exist?
3. What is the voltage across a 60 ohm resistor with a current of 3 1/3 amp.
4. A water wave has a frequency of 6hz and a wavelength of 3m. (a) What is the period of these waves? (B) what is the wave velocity?
5. How much time will elapse between seeing and hearing an event that happens 400 meters from you?
6. A submarine sends a sonar signal which returns from another ship 2.25 seconds later. How far away is the other ship if the speed of sound is 1530 m/s in sea water.
Explanation / Answer
1. Total charge = 1,000,000,000 x 1.6 x 10-19
= 1.6 x 10-10 Coulombs
2. 1.6 x 10-19 Ampere
3. Voltage = 60 x 10/3 = 200 volts
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