At a distance of 0.75 meters from its center, a van der graff generator interacts as if it were a point charge, with that charge concentrated at its center. a test charge at that distance experiences an electric field of 4.5 × 10^5 newtons/coulomb. what is the magnitude of charge on this van der graff generator? a. 1.7 × 10^-7 coulombs b. 2.8 × 10^-7 coulombs c. 3.0 × 10^-7 coulombs d. 8.5 × 10^-7 coulombs

B.

Explanation:

As we know that the electric field due to Van de graff generator is same as that of a point charge

so it is given by

here we know that

also we know that

now from above formula we have

here we will have

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

they should be similar or the same