Ask Experts Questions for FREE Help !
Ask
    Jackman2013's Avatar
    Jackman2013 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jun 30, 2013, 12:32 AM
    Ask physics questions and get answers
    What is the repulsive force between two pith balls that are 8 cm apart and have equal charges of -30 nC?
    Jackman2013's Avatar
    Jackman2013 Posts: 2, Reputation: 1
    New Member
    		  
    #2

    Jun 30, 2013, 12:36 AM
    Common static electricity involves charges ranging from nanocoulombs to microcoulombs. How many electrons are needed to form a charge of -2.00 nC?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #3

    Jul 1, 2013, 11:56 AM
    For (1) apply Coulomb's Law:



    For your second question the charge of one electron is approximately 1.602 x 10^(-19) coulomb's. So 1 coulombs is the charge of 1/(1.69 x 10^(-19) ) electrons. Can you finish the problem from here?
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Physics questions and answers [ 1 Answers ]

If the time of flight of a projectile is 10 secinds, range is 500 metres. Then what is the maximum height attained by it?

Answers to all physics questions? [ 6 Answers ]

A 75.0 g bullet is fired at a muzzle velocity of 476 m/s from a gun with a mass 4.75 kg and a barrel length of 60 cm How long is the bullet in the barrel?

Get answers to physics questions [ 1 Answers ]

A roller coaster moves 85 m horizontally, then travels 45 m at an angle of 30 degrees above horizontal. What is the displacement from its starting point?

I need answers and the work for these physics questions [ 2 Answers ]

I need help on these physics questions. Can someone please help me with any or all of these. I need to know how to do all of these, so if you guys can take like a question or two and help me with all the question. I need the work and the answer. Thank you so much! Question #1 An 82.00kg man jumps...

I need the answers and work on these physics questions [ 2 Answers ]

I need help on these physics questions. Can someone please help me with any or all of these. I need to know how to do all of these, so if you guys can take like a question or two and help me with all the question. I need the work and the answer. Thank you so much! Question #1 An 82.00kg man jumps...

View more questions Search