A small charged sphere has a mass of 0.05 kg and a charge of -6.5x10−5 −
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C. A second small charged sphere has a mass of 0.07 kg and a charge of -3.6x10−5
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C. What electrostatic force exists between them if they are 22cm (0.22m) apart? Is the force attractive or repulsive?

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer

It is really hard for me right know