A positive charge 9₁ = 2.70 μC on a frictionless horizontal surface is attached to a spring of force constant kas in Figure P15.12. When a charge of q2 = -8.60 μC is placed 9.50 cm away from the positive charge, the spring stretches by 5.00 mm, reducing the distance between charges to d = 9.00 cm. Find the value of k. ww 91 Figure P15.12 92

A positive charge q, = 3.00 µC on a frictionless horizontal surface is attached to a spring of force constant k as in the figure shown below. When a charge of q, = -8.950 µC is placed 9.50 cm away from the positive charge, the spring stretches by 5.00 mm, reducing the distance between charges to d = 9.00 cm. Find the value of k. ww 92 N/m Need Help? Read It

Multiple Choice.

A charged particle A exerts a force of 2.40 ?N to the right on charged particle B when the particles are 12.4 mm apart. Particle B moves straight away from A to make the distance between them 16.2 mm. What vector force does particle B then exert on A? ?N to the left

Clearer solution. The writing is kinda hard to read.

A 0.10 g honeybee acquires a charge of 20 pC while flying. The electric field near the surface of the earth is typically 100 N/C , directed downward. What is the ratio of the electric force on the bee to the bee's weight? What electric field strength would allow the bee to hang suspended in the air?

Please assist with this question with explanation. Thank you

The two spherical shell has a charge of q1 = 0.30nC and q2 = 0.5nq. The radius of r1=7.5cm and r2 = 2.5cm. What is the new votage value in volts, after the charge transfer is completed between the two spheres? 92

The figure below shows two identical small, charged spheres. One of mass 4.3 g is hanging by an insulating thread of length 20.0 cm. The other is held in place and has charge q₁ = -3 -3.1 μC. The thread makes an angle of 18° with the vertical, resulting in the spheres being aligned horizontally, a distance r apart. Determine the charge 92 on the hanging sphere. nC 20.0 cm 18⁰ 91 92 ✈

1) a. You hold a ruler that has a charge on its tip 4.00 cm above a small piece of tissue paper to see if it can be picked up. The ruler has -14.0 µC of charge. The tissue has 1.00 g of mass. What is the minimum charge required to pick up the tissue paper? b. A 50.2 g ball of copper has a net charge of 2.2 pC. What fraction of the copper's electrons have been removed? (Each copper atom has 29 protons, and copper has an atomic mass of 63.5.) c. How many coulombs of positive charge are there in 1.36 kg of plutonium, given that its atomic mass is 244 and each plutonium atom has 94 protons?