# Physics

Two 10 cm diameter charged rings face each other, 20 cm apart. The left ring is charged to -20 nC and the right ring is charged to +20 nC.

What is the force on a 1.2 nC charge placed at the midpoint?

I have already calculated the electric field between the two rings to be 25723.87 N/C to the left. However, I don't know how to use the rings as point charges to solve the second problem.

1. 👍
2. 👎
3. 👁
1. You say you know the field. It should be along the axis of the rings. Just multiply it by the charge to get the force

1. 👍
2. 👎
2. Thank you. I didn't know I could do that, but it did give me the right answer.

1. 👍
2. 👎
3. A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?

1. 👍
2. 👎
4. how did you get 25723.87? can you show the complete calculation please?

1. 👍
2. 👎

## Similar Questions

1. ### Chemistry

Alicia's cheapskate boyfriend gave her a ring he claims is 24 carat gold. Alicia is skeptical. After chem class the next day she measures the mass of the ring, finds the volume of the ring by water displacement, and then

2. ### science

Two rings carry uniformly distributed charges, one of +25 nC and the other of -25 nC. They are placed 16 cm apart, concentric with a common horizontal axis. The ring on the left carries the positive charge and the one on the right

3. ### Math

Can you explain how to do this question? "Three clocks ring once at the same time. After that, the first clock rings after every 90 minutes, the second after every 30 minutes, and third after every 60 minutes. After how many

4. ### Math - Please check!

1. Find the circumference of a circle with a diameter of 11 cm to the nearest hundredth. Measurement formula C = pi x diameter a. 34.54 cm *** b. 17.27 cm c. 5.5 cm d. 33 cm 2. Which of the following is an irrational number? a.

1. ### physics

At 20 degrees C an aluminum ring has an inner diameter of 5.000 cm, and a brass rod has a diameter of 5.050 cm. Keeping the brass rod at 20°C, which of the following temperatures of the ring will allow the ring to just slip over

2. ### Physics

An iron ball of diameter 15.23cm rests on a brass ring of internal diameter 15.0cm at a temperature of 20 degrees celsius. To what temperature must both be heated for the ball to pass through the ring?

3. ### Math

CLIMATOLOGIST Each year a tree is alive,it adds a layer of growth,called a tree ring,between its core and its bark. A climatologist measures the width of tree rings of a particular tree for different years: YEAR:

4. ### Physics Electricity and magnetism

Two 10-cm-diameter charged rings face each other, 15.0 cm apart. Both rings are charged to + 30.0 nC . What is the electric field strength at the center of the left ring?

1. ### physic

Before practicing his routine on the rings, a 67 kg gymnast hangs motionless, with one hand grasping each ring and his feet touching the grounnd. Both arms make an angle of 24 degrees with the vertical.(a) If the force exerted by

2. ### Mathematics

A golden wedding ring is 20mm in diameter and has a 14mm hole in the middle A. What is the area of the ring B. What is the cost of the ring if 1mmsquare of gold is equivalent to 5gh

3. ### math

A bell rings every 2 hours, a second bell rings every 3 hours, and a third bell rings every 4 hours. If all 3 bells ring at 9:00 AM. , at what time will all 3 bells next ring?

4. ### ..physics.

At 20.0 C, an alumium ring has an inner diameter of 5.0000 cm and a brass rod has a diameter of 5.0500 cm. a. If only the ring is heated, what temperature must it reach so that it will just slip over the rod? b. WHAT IF? If both