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• Two pellets, each with a charge of 0.70 microcoulomb (7.0×10^-7 C ), are located 4.0 cm (4.0×10^-2 m ) apart. Find the electric force between them.What would be the mass of an object that would experience this same force in Earth's gravitational field?
  
• What happens to resistivity(ρ) when area of cross section of material is doubled and length is halved?
  
• What is the kinetic energy in joules of a 0.02 kg bullet traveling 300 m/s?