Essays Tagged: "Electric charge"

Discovery of the electron

elementary particle to beidentified. The electron is the lightest known particle whichpossesses an electric charge. Its rest mass is Meequal> 9.1 x 10 -28 g, about 1/1836 of the mass of the proton ... ilikan in 1909. In this experiment,the charges of droplets of oil in air are measured by finding theelectric field which balances each drop against its weight. Theweight of each drop is determined by ...

(2 pages) 40 0 3.0 Nov/1996

Subjects: Science Essays > Chemistry

An experiment to investigate the factors which affect the resistance in a wire.

tance?A potential difference (V) applied across a wire of length (l), there is in the conductor, an electric field (E). In this electric field the free electrons are not however under continuous accel ... be noted that all materials require to have a potential difference applied in order to maintain an electric current in the material. Consequently all materials have resistance. Some materials become ...

(7 pages) 90 0 5.0 Jan/2003

Subjects: Science Essays > Physics

Electric charge and static electricity.

e charge is shown with a (-) sign. Just as magnetic poles exert their forces over a distance, so do electric charges. An electric charge exerts a force through the electric field that surrounds the ch ... orce through the electric field that surrounds the charge. When a charged particle is placed in the electric field of another charged particle, it is either pushed or pulled. It is pulled towards the ...

(2 pages) 44 0 3.3 Apr/2003

Subjects: Science Essays > Physics

Operation of a laser printer.

oint on the drum corresponds to a point on the sheet of paper. Next, the paper is passed through an electrically charged wire, which gives it a negative charge.On accurate laser printers, turning the ... ready for the cycle to start again, the drum must be cleaned of any remnants of toner. Physical and electrical are two forms of cleaning. In the first one, the toner, which was not transferred to the ...

(3 pages) 45 1 4.1 May/2003

Subjects: Science Essays > Technology

Stuff about electricity , atoms, and electrons.

ElectricityHistory of ElectricityIn 1660 Otto von Guericke invented a machine for producing static e ... a particle accelerator. Robert Boyle found out that attraction and repulsion were jointed and that electric force was sent through a vacuum. Stephen Gray distinguished between conductors and noncondu ... ephen Gray distinguished between conductors and nonconductors. C. F. Du Fay recognized two kinds of electricity and Benjamin Franklin and Ebenezer Kinnersley later named them positive and negative. Al ...

(4 pages) 55 1 1.3 Sep/2003

Subjects: Science Essays

This essay is about how photocopiers work and how chemistry is involved in the process.

first copy machine in 1959.The main principle at work in any laser printer or photocopier is static electricity. Static electricity is basically an electrical charge built up on any insulated object, ... tricity is basically an electrical charge built up on any insulated object, which is an object that electricity cannot easily flow through. Since atoms that are oppositely charged are attracted to eac ...

(9 pages) 56 0 4.4 Dec/2003

Subjects: Science Essays > Chemistry

Atoms, Molecules and Chemical Reactions

e speeds in this space are very small pieces of matter called electrons. Each proton has a positive charge. Each neutron has a neutral charge. Electrons have almost no mass and they are negatively cha ... can actually transfer electrons from one atom to another. This transfer causes both atoms to become charged (since the number of positive protons is no longer equal to the number of negative electrons ...

(2 pages) 53 0 3.9 Feb/2004

Subjects: Science Essays > Chemistry

What is radioactivity?

living beings - consists of molecules, which are combinations of atoms. Atoms include a positively charged nucleus, around which move negatively charged electrons. The atom is neutral.The nucleus of ... move negatively charged electrons. The atom is neutral.The nucleus of the atom includes positively charged protons as well as neutrons. It is this nucleus that is transformed when a radiation is emit ...

(1 pages) 40 2 4.3 Jun/2004

Subjects: Science Essays > Chemistry

Physics 10 Notes on Static Electricity.

Static Electricity Bohr Model Electrons move External Less massive compared to ... un Connection to ground is broken End result is charged object Electrical Ground Any charged objects that come in contact w/ the ground will be neutralized ... It's BIG Plumbing Bill Gates finding 25 cents Twitches Muscles receive electrical impulses Causes twitch Non Conductors Dielectric property Abi ...

(1 pages) 15 0 3.0 Sep/2004

Subjects: Science Essays > Physics

The Raisins in a Bun Model done by JJ Thomson and the discoveries that followed.

In the 1890's scientist found that invisible rays are emitted when matter is hit with a jolt of electricity. Such experiments involved transmitting electric arcs between two ends of cathode ray tu ... Some physicists discovered some substances that spontaneously emitted invisible rays regardless of electricity or any other type of energy. An example of these substances are: uranium and radium, whi ...

(2 pages) 27 0 4.1 Oct/2004

Subjects: Science Essays > Physics


What Is Electricity?You use it every day, but what exactly is electricity? To understand it, we must go down ... that substance will have no net charge. This is why an item at rest will not spontaneously generate electricity: it is stable. Neutrons and protons normally remain static within the nucleus of most (n ... een those atoms and adjacent ones. This is most readily observable through the phenomenon of static electricity. In the classic experiment that you can do at home, a balloon is is rubbed on a child's ...

(4 pages) 49 1 4.0 Jan/2005

Subjects: Science Essays


tudy of weather. A meteorologist is a person who studies the atmosphere.One of nature's displays of electrical forces is the lightning storm. A lightning stroke is a brief but large current of negativ ... n either the stepped leader reaches the ground or a streamer runs up to join the stepped leader, an electrical connection is completed between the cloud and the ground.The first charges to feel the co ...

(3 pages) 32 0 2.5 May/2005

Subjects: Science Essays > Earth Sciences > Meteorology

Atomic structure

particles have different properties. Electrons are tiny, very light particles that have a negative electrical charge (-). Protons are much larger and heavier than electrons and have the opposite char ... protons have a positive charge. Neutrons are large and heavy like protons, however neutrons have no electrical charge. Each atom is made up of a combination of these particles. Let's look at one type ...

(5 pages) 36 0 4.5 May/2005

Subjects: Science Essays > Chemistry

A Physics Investigation of the Resistance: Of A Piece of Wire?

n is to investigate and discover if the length of a piece of metal wire effects its resistance when electricity is passed through it.PredictionBefore I make a prediction I shall explain about atoms, f ... nBefore I make a prediction I shall explain about atoms, free electrons, electricity and resistance.Electricity travels through a conductor, in this case a length of wire, by means of free electrons. ...

(9 pages) 33 0 5.0 Dec/2005

Subjects: Science Essays > Physics


cting surfaces, called capacitor plates. These two plates are separated by a non-conductor called dielectric, which can be a vacuum, air, plastic, etc. Capacitors actually have many appearance ... piece of gum with two wires protruding from the bottom. Capacitors are mainly used to store electrical charge and discharge electrons. It holds it for a certain amount of time, which is actual ...

(3 pages) 1187 0 0.0 May/2001

Subjects: Humanities Essays


in classifying conductivity (Process by which charges move freely through materials in response to electric fields) of objects through the rate of discharge. (The discharge of the electroscope) We fi ...

(1 pages) 701 0 0.0 Jun/2001

Subjects: Science Essays > Physics

Ecology Levels Of Biological Organization

the subatomic particles: protons, neutrons, and electrons. Protons, located in the nucleus, have an electrical charge, and neutrons, also located in the nucleus have no charge. Electrons have a negati ...

(2 pages) 5 0 0.0 Jun/2001

Subjects: Science Essays > Biology

How electrostatics influence our lives

Physics EssayHow electrostatics influence our lives?IntroductionWe all are familiar with the term electricity which comes from batteries and which is used to light bulbs, buzzers, and other electric ... buzzers, and other electrical devices. We also know that conductors are those objects which conduct electricity easily and insulators do not conduct electricity at all. This is basic knowledge but rig ...

(5 pages) 32 1 4.0 Nov/2007

Subjects: Science Essays > Physics

Random Access Memory (RAM): The Genius of Memory

that plug in slots on the computer's motherboard. These slots connect through a bus line or set of electrical paths to the computer's processor. Before you turn on a computer, its RAM is a blank slat ... tore data. The memory controller organizes the request and sends the column and row addresses in an electrical charge along the appropriate address lines, which are very thin electrical lines etched i ...

(3 pages) 16 0 0.0 Sep/2009

Subjects: Science Essays > Computer Science


ydration once, they are prone to succumb again easier the next time.The human body needs positivity charged ions to move, function, and live properly. When these positivity charged ions become diluted ... The three main electrolytes are potassium, chloride, and sodium. "Potassium and sodium (positively charged ions) create nerve impulses which dictate thought, movement and responses."(Oliver, pg.1) Mu ...

(6 pages) 29 0 0.0 May/2010

Subjects: Science Essays > Biology > Human Biology