'1. [-1'2 Points] DETAILS Common static electricity involves charges ranging from nanocoulombs to microcoulombs. {a} How many electrons are needed to form a charge of E~.9I} nC? : electrons {In} How many electrons must be removed from a neutral object to leave a net charge of 0.560 pC? : electrons 2. [-/2 Points] DETAILS An amoeba has 3.60 x 1045 protons and a net charge of 0.660 pC. (a) How many fewer electrons are there than protons? electrons (b) If you paired them up, what fraction of the protons would have no electrons? protons without electrons protons3. [-/1 Points] DETAILS A charge q = 2.3 pC is placed at the point P shown below. What is the force on q (in N)? (Assume the positive direction is to the right. Indicate the direction with the sign of your answer.) +- 2.0 m 1.0 m 1.5 PC -3.5 PC N4. [-11 Points] MY NOTES H ASKVOURTEACHER ll PRAI The charges a1 = 2.4 x 10'7 C, a: = 76.5 x 10'7 C, and a3 = 71.8 x 10'7 C are placed at the corners of the triangle show below' What is the force on 1.11 {in N]? [Assume that the Head; is to the right and the +yraxi5 is up along the page.) 91 3.0 m 5 m :13 4.0 m {,2 Earl 1 : N 5. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Red blood cells often can be charged. Two red blood cells are separated by 1.35 m and have an attractive electrostatic force of 0.989 N between them. If one of the red blood cells has a charge of +8.69 x 10* C, what is the sign and magnitude of the second charge