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Electrostatics

Electrostatics is the branch of physics that deals with the study of charges at rest. A common electrostatic phenomena is plastic wrap sticking to your hand and itself when removed from the box. Everything to do with electrostatics goes in this category.

1,860 Questions

What are the reasons why you do not recommend the Nania Airway?

The Nania Airway has several issues. One of the biggest being that the crotch strap is very long (and according to Nania/Safety Baby/what ever current name they are using, it has to be this way because it failed crash tests with it shorter) it puts the buckles right into the child's abdomen. There is no way to tell if this would cause serious internal injuries or not since the crash test dummies do not have sensors in that area. But if we follow crash forces we can map out that this may put enough presure into that area and may cause internal injuries to the child. No way to know this foresure without your child being the crash test dummy with "sensors".

Next reason, is because I find it very difficult to install. It has a high belt path and it flat out doesn't fit in many vehicles.

Next reason, it is difficult to adjust the harness and move it from one set of slots to another. If a seat is difficult to use, then parents are likely to not use it correclty putting the child at risk.

There are better options on the market. I much prefer them to the Airway!

Jen E. CPS Tech and mom to 3 in seats!

What is coulombs law of electric force?

Two point charges attract or repel each other with a force which is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

Where, [In SI, when the two charges are located in vacuum]

− Absolute permittivity of free space = 8.854 × 10−12 C2 N−1 m−2

We can write equation (i) as

What is meant by the statement that electrostatic forces obey the principle of superposition?

The electrostatic forces obey principle of superposition because these forces are independent of each other. It means that if an electric force is applying on a charge than this will not effected by any other field.

What is the difference between static electricity and moving electricity?

Static electricity, such as might build up in your carpet, can best be described as voltage. "moving" electricity is current, which is measured in Amps. I'll skip the math and Ohm's law, and try to give a conceptual answer. If you think of an electric circuit as being a set of water pipes in which the electricity is the water, then voltage is the water pressure and amperage is the rate at which the water is flowing. If the water is flowing through a pipe that does not restrict it, then the amount of water flowing is directly proportional to the water pressure. however, if the pipe resists the movement of the water, then the water flow slows down and the water pressure increases. Conversely, if the pipe exhibits less resistance, then the water pressure drops again and the water flow increases. This analogy gives a basic idea of the difference between static and moving electricity, but it is overly simplified and skips some important concepts. If you've taken physics, you can also think of voltage as being potential energy, current as being kinetic, and resistance as being friction.

What is it called when positive and negative charges transmit energy?

Because in an unbalanced system, the positive end a positive charge, and the negaticve end has a negative charge. Though current (which is reletive to the "positiveness" of an area) flows from positive to negative, electrons flow from negative to positive.

In a hydrogen atom an electron revolves around a proton Which of these two exerts a greater electrostatic force on the other?

The proton exerts a greater electrostatic force on the electron in a hydrogen atom. This is because the proton has a much larger mass and positive charge compared to the much smaller mass and negative charge of the electron.

What is conducted?

Conducted generally refers to carrying out or performing a task, activity, or operation. It involves organizing and overseeing the implementation of a plan or process to achieve a specific goal or outcome.

When does static electricity happen?

Static electricity occurs when there is a buildup of electric charge on the surface of an object due to friction with another surface. This charge imbalance can cause sparks or shocks when the object comes into contact with a conductor or a grounded object. Static electricity is more likely to happen in dry environments or when certain materials, like plastics or rubber, are involved.

What is the difference between magnetism and electricity?

The difference between electricity and magnetism is that you must be in the same frame of reference as the electric field to experience electricity, because all that magnetism is, is electricity moving relative to you.
Although they are two different forms of energy, you can use magnetism to create electricity and you can use magnetism to create electricity.
Electricity is the flow of energy or current through a metallic substance. Magnetism is the attraction of the metallic molecules in a solid or substance.

How can you calculate the total charge on a spherical body if its radius R and surface charge density sigma are given?

Uh, assuming by "spherical body" you mean "spherical shell of insignificant thickness" then it would just be 4*pi*(R^2)*sigma

What charge does amber get when rubbed with nylon?

Amber becomes negatively charged when rubbed with nylon. This is due to the transfer of electrons from the amber to the nylon, leaving the amber with an excess of electrons and thus a negative charge.

What is the material of sonometer wire?

The material of a sonometer wire is typically steel or a metal alloy with good elasticity and strength. These materials are chosen for their ability to vibrate easily and produce clear tones when tensioned and plucked.

Give 10 examples of conservation of charge?

  1. When a negatively charged object transfers excess electrons to a neutral object, the total charge before and after remains the same.
  2. During a chemical reaction, the total charge of the reactants is equal to the total charge of the products.
  3. In an electric circuit, the total current entering a junction is equal to the total current leaving the junction, demonstrating conservation of charge.
  4. When a positively charged object is brought near a neutral object, charge is redistributed but the total charge remains constant.
  5. The process of charging by friction demonstrates conservation of charge, as charge is transferred between objects without being created or destroyed.
  6. The discharge of a capacitor involves conservation of charge as the total charge on the capacitor remains the same before and after discharge.
  7. Conservation of charge is observed in electrostatic precipitation systems, where particles acquire charge but the total charge in the system is conserved.
  8. In nuclear reactions, the sum of the charges of the particles before the reaction is equal to the sum of the charges of the particles after the reaction.
  9. When a conductor is grounded, excess charge is transferred to or from the ground, ensuring conservation of charge in the system.
  10. The concept of conservation of charge underlies the working of devices like photocopiers and inkjet printers, where charge is manipulated for image formation without violating the conservation law.

Two identical positive charges exert a repulsive force of 5.6 10-9 N when separated by a distance of 4.0 10-10 m Calculate the charge of each?

The force between two point charges is given by

F = (k)(q1)(q2) / (r2)

where k = 9.0 * 109

substituting q1=q2 and r = 4.0 * 10-10 and F = 5.6 * 10-9 then solving for q leads to a value of q = 9.97 * 10-19

Why does static electricity charge with wool?

Static electricity is the buildup of electrical charges on the surface of some object or material. Static electricity is usually created when materials are pulled apart or rubbed together, causing positive (+) charges to collect on one material and negative (−) charges on the other surface. Results from static electricity may be sparks, shocks or materials clinging together.

Why Electric Field is zero inside a charged isolated conductor?

Because in a charged isolated conductor charges are distributed equally into all the sides of a conductor, and also it contains both positive and negative charges, so the opposite forces of each charges cancel each other, that's why E is zero..

Is nigrosine repelled by negative charges in bacteria?

Yes. It is a negative stain and so therefore repels and is repelled by other negative charges.

Is electric field dependent of magnitude of charge?

Yes, the electric field created by a point charge is directly proportional to the magnitude of the charge. As the charge increases, the electric field strength at a given distance from the charge also increases.

What happens to statically charged objects as they move apart?

Statically charged objects will experience an attractive or repulsive force that causes them to move apart. This is due to the electrostatic force between the charges on the objects. The force is determined by the magnitude of the charges and the distance between them, following Coulomb's law.

What happens when an uncharged body is brought in contact with electroscope?

When an uncharged body is brought in contact with an electroscope, the electroscope will remain unchanged as there is no transfer of charge. The electroscope will continue to show no deflection of the indicator due to the absence of any charge transfer.