Two small metallic spheres, each of mass m = 0.15 g, are suspended as pendulums by light strings from a common point as shown in the figure below. The spheres are given the same electric charge, and it is found that they come to equilibrium when each string is at an angle of 0 = 4.8° with the vertical. If each string has length L = 40.0 cm, what is the magnitude of the charge on each sphere? L m Your response differs from the correct answer by more than 10%. Double check your calculations. nC

Two small balls, each of mass 5.4 g, are attached to silk threads 46 cm long, which are in turn tied to the same point on the ceiling, as shown below. When the balls are given the same charge Q, the threads hang at 5.0° to the vertical, as shown below. 5.0° What is the magnitude of Q (in C)? What are the signs of the two charges? O The ball on the left has a positive charge while the ball on the right has a negative charge. O The charges can be positive or negative, but both have to be the same sign. O The signs of the charges do not matter. O The ball on the left has a negative charge while the ball on the right has a positive charge.

Consider the following situation. Particles A and B have equal charge. They are separated by a distance d and they each experience a force of F from the other. What force will they both experience if the distance between them is increased to 2d?

A small positively charged plastic ball of mass m and charge q is suspended by a massless string of length L in a uniform electrical field E as shown in the attached image. The ball is in equilibrium when the string makes an angle of θ with the vertical. Note that the ball is under the influence of both the electric field E and the earth's gravitational force g. a. Write an equation for the horizontal electrical force acting on the ball in terms of the relevant variables provided above b. Write an equation for the tension T in the string, using any or all of the relevant variables provided above and/or any relevant constants (g, G, k). Include a sentence explaining the reasoning behind your equation (there are two possible ways to set up this equation).

Two coins are placed on a horizontal insulating surface a distance of 1.7 m apart and given equal charges. They experience a repulsive force of 1.8 N. Calculate the magnitude of the charge on each coin. C

A small plastic ball of mass m = 2.50 g is suspended by a string of length L = 19.5 cm in a uniform electric field, as shown in the figure below. If the ball is in equilibrium when the string makes a 0 = 14.0° angle with the vertical as indicated, what is the net charge on the ball? I E=1.00 x10³ N/C L m

A charged cork ball of mass 0.50 g is suspended on a light string in the presence of a uniform electric field as shown in the figure below. When E = (4.80 î + 5.60 j) × 10° N/C, the ball is in equilibrium at e = 37.0°. (a) Find.the charge on the ball. Enter a number. differs from the correct answer by more than 10%. Double check your calculations. C (b) Find the tension in the string. N Need Help? Read It Master It

Two small identical conducting spheres are placed with their centers 0.42 m apart. One is given a charge of 10 ✕ 10-9 C, the other a charge of -14 ✕ 10-9 C. (a) Find the electrostatic force exerted on one sphere by the other. N(b) The spheres are connected by a conducting wire. Find the electrostatic force between the two after equilibrium is reached. N

two-point charges q1and q2 are held in place 4.50cm apart. Another point charge -1.95 μC of mass 4.00 g is initially located 3.00 cm from each of these charges (the figure(Figure 1)) and released from rest. You observe that the initial acceleration of -1.95 μC is 354 m/s^2 upward, parallel to the line connecting the two point charges. Part A Find q1 and q2.Enter your answers numerically separated by a comma.

A small metal ball with positive charge q and mass m is attached to a very light string, as shown in (Figure 1). A larger metal ball with negative charge −Q is securely held on a plastic rod attached to the ceiling. The distance between the balls' centers is r. Write an expression for the magnitude of the force T that the string exerts on the ball. Express your answer in terms of the variables q,m,Q, r, and constants k_C and g.