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Lecture Notes for PHY 184 - Phys Scientists & Engineers II at Michigan State (MSU)

Notes Information

Material Type:Class Note
Professor:Staff
Class:PHY 184 - Phys Scientists & Engineers II
Subject:Physics
University:Michigan State University
Term:Spring 2005
Keywords:
  • Low Temperatures
  • Magnetic Resonance Imaging (mri)
  • Total Charge
  • Positive Charge
  • Atomic Nucleus
  • Negative Charges
  • Mass Number
  • Atomic Number
  • Atomic Mass
  • Electric Current
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Sample Document Text

1 January 11, 2005 Physics for Scientists&Engineers 2 1 hys c f ci i P i s or S ent sts & Engineers 2 Spring Semester 2005 Lecture 2 January 11, 2005 Physics for Scientists&Engineers 2 2 Electric Charge ? When we walk on a carpet on a dry winter's day and then touch a door knob, we often experience a spark . This process is called charging . In this case charg ng consists of mov ng negatively charged electrons from the atoms and molecules of the carpet to the soles of our shoes . The built-up charge discharged through the metal of the door knob producing a spark ? Similar phenomena involving moving air masses produces lightning January 11, 2005 Physics for Scientists&Engineers 2 3 Charge (2) ? Normally objects around us do not seem to be charged ? They have equal amounts of positive and negative charge and are thus electrically neutral ? Demo: . If we rub a glass rod with a cloth, the rod will become charged . If we bring two charged glass rods together they will repel each othe...

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