In the figure, the particles have charges 91-92-290 nC and q3=-94-94 nC, and distance a = 5.7 cm. What are the (a) x and (b) y components of the net electrostatic force on particle 3?

I'm confused on how to tell what equation to use to solve this. Can you explain how to determine that are well. Thank you!

A cylinder containing 100.9 cubic centimeter of gas at a pressure of 376 kPa when its temperature is 534 K. Given that its temperature is unchanged when the pressure was increased by a factor of 5.9, Determine the new volume of the gas (In cubic centimeter). Note: Your answer must be in cubic centimeter, however, do not include the unit, just enter the magnitude that corresponds to the final volume in cubic centimeter. Round your answer to 2 decimal points Round your answer to 2 decimal points

..................... The dimensions of the quantity kinetic energy, designated by K, are kg m/s, It can be written in terms of the momentum p and mass m as K = 2m (a) What are the units of momentum in terms of fundamental SI units? (Use the following as necessary: kg, m, and s.) [P) - (b) Force is measure in units of newtons, N, where 1N- 1 kg m/s. What are the units of momentum p in terms of a newton and another fundamental SI unit? (Use the. following as necessary: N, m, and s.) [P) = (c) What If? Physicists often measure the momentum of subatomic particles moving near the speed of light in units of MeV/c, where c is the speed of light, and 1 Mev = 1.6 x 101 kg m/s. Based on this, what are the units of momentum for a high-speed subatomic particle in terms of fundamental SI units? What are the units of momentum for a high-speed subatomic particle in terms of a newton and another fundamental SI unit? [P] -