This was very blunt and surprising to hear from any official in charge of an aviation disaster. In the bowl of an electric mixer, cream the butter and brown sugar until light and fluffy. The mother's lips could not finish the charge she was about to put upon her innocent child.
There was a time when Aristide Pujol, in sole charge of an automobile, went gaily scuttering over the roads of France. Louis was not less astonished at this charge, than the Empress had been at the communication which aroused it. The Countess drew a beautiful miniature from its case, which lay on the sofa near her, and presented it to her young charge.
New Word List Word List. Save This Word! The two kinds of charge are given negative and positive algebraic signs: measured in coulombs. We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms. Also called charge , electricity. The force is much like the repulsive force you feel when you bring two magnets together north to north or south to south. Insulators are materials such as glass, rubber, wood and most plastics where the electrons are held quite tightly and are not free to move easily from place to place.
Conductors are materials such as copper, silver, gold and iron where electrons are free to move from place to place. For example, a charged balloon insulator is brought near a neutral aluminium can conductor.
While the can is far away from the balloon, the negative charge on the balloon has little or no effect on the can, and the electrons on the can are evenly dispersed. When the balloon is brought near the can, something interesting happens — the electrons move to the side of the can to get as far away from the negatively charged balloon as possible. This leaves the side of the can nearest the balloon positively charged. The can as a whole is still neutral, but because the positively charged side of the can is close to the balloon, the negative charges on the balloon attract the positive side of the can and the force pulls the balloon and can together.
If the can is lying on its side, it will roll towards the balloon. Something quite different happens if the conducting can is allowed to touch the charged balloon. When the balloon and can touch, some of the electrons on the balloon will flow onto the can, leaving the can with extra electrons and therefore negatively charged.
Now both the balloon and can are negatively charged, and the like charges cause a force pushing the can and balloon apart. If the can is lying on its side, it will roll away the balloon. In the above example, we used a negatively charged balloon to impart a negative charge to the can by a process of direct contact.
It is also possible to use a negatively charged balloon to impart a positive charge on a can through a process called induction. If the balloon is brought near the can, the electrons move to the far side of the can, as described earlier.
If another object, like a finger, now touches the negative side of the can, some of the overcrowded electrons will flow onto the object, leaving the can positively charged.
Dissimilar charges positive and negative attract each other. In physics, the term "charge" may also refer to color charge in the field of quantum chromodynamics. In general, charge refers to a generator of continuous symmetry in a system. The proper unit for electric charge is discipline-dependent. In chemistry, a capital letter Q is used to indicate charge in equations, with the elementary charge of an electron e as a common unit.
The SI derived unit of charge is the coulomb C. Electrical engineering often uses the unit ampere-hour Ah for charge. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads.
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