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FIU / Physics / PHY 2054 / What is electric dipole and its unit?

# What is electric dipole and its unit? Description

##### Description: This study guide covers everything in Chapters 17 and 18 (on the exam), and contains all the examples the professor worked out in class as well as every single homework problem (which will be similar problems as the exam itself). These notes include diagrams, formulas, equations and sample problems to study from.
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PHY 2054: PHYSICS WITHOUT CALCULUSIf you want to learn more check out What are the features of branched-chain alkanes?

EXAM 1 STUDY GUIDEDon't forget about the age old question of Who is the father of american sport psychology?

Chapters 17 and 18

Florida International University

If you want to learn more check out How do you prove contraposition?

fiuphy2054@gmail.com / danrodri@fiu.edu
Course Website= masteringphysics.com

MPRODRIGUEZ2044979

01/27/17

Don't forget about the age old question of What’s the chance that there are two people in the room who have the same birthday?

Section 17.1. Electric ChargeWe also discuss several other topics like What refers to the process of trading goods and services for another good or service— rather than money?

• Atomic Number - number of protons or electrons in a neutral atom
• Ion- any charged atom (+/-)
• Mass of electron= 9.109 x 10 -39 kg
• Mass of proton= 1.673 x 10 -27 kg
• Mass of neutron= 1.675 x 10 -27 kg
• e = 1.602 x 10 -19 c (charge of proton or electron)
• Q = N e or Q = e
• Q → charge
• Electric Dipole= pair of electric charges of equal magnitude but opposite signs separated by some distance.

We also discuss several other topics like What characterizes strong acid-strong base titration?

Section 17.2. Conductors and Insulators

• Conductors: allow for the flow of charges
• E.g. Copper Wire

• Insulators: do not allow any flow of charges
• E.g. Rubbers and lightning

• Semiconductors: properties of both conductors and insulators. They conduct, but not as well as other metals.
• E.g. Fe (iron) is not as good a conductor as copper. Silicon (engineer constructed)
•  ⇒
• We would assume not attraction. But there is some attraction (e.g. Fridge Magnets) the negatively charged object attracts to the positive particles of the neutrally charge particle or object.

• → segregation = polarization (properties of neutral object did not change)
• Induction = objects do not touch but balance each other out
• Conduction = objects touch to balance each other out.

Section 17.3. Conservation and Quantization of Charge

• Conservation of Charge- the algebraic sum of all electric charges in an enclosed system is constant. (energy cannot be destroyed)

• Everything has two polarities (-) or (+)s. (Batteries)

Section 17.4. Coulomb’s Law         c = unit of charge

• For every two bodies, there’s something bringing them together or pulling them apart. There’s always a force between them.

• Equation: ; G = gravitational constant (previous equation)

• Gravity is neglected, so a new constant is used

• ; K = proportionality constant; Actual Coulomb’s Equation

• ⇒ K =

• F can also be =

• Principle of superposition of charge
• When two charges exert forces simultaneously on a third (3rd) charge, the total force on that charge is the vector sum of the forces that the two charges exert individually
• Problem (7)

• 24k gold ring with a mass of 17.7 g. The atomic mass of gold is 197 g/mol and the atomic number is 79. (a) How many protons are in the ring? What’s their total positive (+) charge? (b) If the ring carries a net charge, electrons?
• Data:
• m g =17.7 g
• M g = 197 g/mol
• n = 79
• Solution:
•  (a) n p
• Q = (n p)(Q p)
• Q = (4.27 x 10 24)(1.602 x 10 -19 c)
• Q = 6.84 x 105 c; charge of protons
• (b) if there’s no net charge, proton number = electron number, so there are 4.27 x 10 24 electrons
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