A thin nonconducting rod with a uniform distribution of positive charge Q is bent into a circle of radius R. The central perpendicular axis through the ring is a z axis, with the origin at the center of the ring. What is the magnitude of the electric field due to the rod at (a) z=0 and (b) z=∞? (c) in terms of R, at what positive value of z is that magnitude maximum? (d) If R = 8 cm and Q = 15 µC, what is the maximum magnitude?

I've attached a screenshot of the question i'm trying to solve and I have pictures of my work here https://imgur.com/a/bQ5IaC1 . My work for this problem is under the 2.44 title, any variable with an "s" in the subscript applies to the speeder, and any variable with a "c" in the subscript applies to the police car.

Grey Maxi... Home Hurry,... Current Time: 10:05:02 PM general.physics.rutgers.edu R List by Da... Practice Assignment Sole et. Al... Untitled d... km Ć Dashboard Homework Time Left: 1 hours 50 minutes R General P... Assignme... Log Out 4. Consider the following three displacement vectors: Vector A has a magnitude of 3.80 km and a direction that makes an angle of 36.0° south of west, vector B has a magnitude of 6.50 km and a direction that makes an angle of 15.0° north of west, vector C has a magnitude of 3.50 km and a direction that makes an angle of 37.0° north of east. Determine the magnitude of the vector X = B+C - A km 5. Two cars are traveling along a straight road. Car (A) maintains a constant speed of 88.0 km/h; car (B) maintains a constant speed of 115 km/h. At t = 0, car (B) is 49.0 km behind car A. How far will car (A) travel from t = 0 before it is overtaken by car (B)? 1 6

You need to set up another simple ramp using the board from Part A (i.e., a board of length 1.56 mm ). (Figure 5) If the ramp must be at a 25∘∘ angle above the ground, how far back from the bed of the truck should the board touch the ground? Assume this is a different truck than the one from Part A. Express your answer in meters to three significant figures.

i just have a question on the algebra on this portion of the problem, what happens to the negative sign that is factored out when you're trying to find the final velocity?

Choose one equation (and only one) from the equation sheet that would let you solve the problem posed. Then define which variables in the equation go with what numbers from the problem itself (not from other problems), and define which variable is being solved for. Do not actually solve the problem numerically or algebraically, just pick the one equation and define the relevant knowns and single unknown. Don’t forget to include direction when called for by a vector variable. 1) A single mole of Carbon Dioxide has a mass of 44 g, and at 1.00 atm of pressure and 20oC (293K) it occupies 22.4 liters. At what speed will you find the peak of its speed distribution function?

Solve for all parts plz … God bless