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Science
Physics
Electromagnetism
Chapter 4 , lesson 1 vocabulary
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Gravity
Terms in this set (8)
Magnet
Is any object that attracts the metal iron
magnetic pole
is a place on a magnet where the force it applies is strongest
Magnetic force
The force of attraction or repulsion between the poles of two magnets
magnetic field
Any material that is strongly attracted to a magnet
ferromagnetic element
elements, including iron, nickel, and cobalt, that have an especially strong attraction to magnets
magnetic domain
A region in which the magnetic fields of all atoms are lined up in the same direction
temporary magnet
a magnet that quickly loses its magnetic field after being removed from a magnetic field
permanet magnet
A magnet that remains a magnet after being removed from another magnetic field
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Verified questions
PHYSICS
Perform the following calculations and express your answer using the correct number of significant digits. (a) A woman has two bags weighing 13.5 lb and one bag with a weight of 10.2 lb. What is the total weight of the bags? (b) The force F on an object is equal to its mass m multiplied by its acceleration a. If a wagon with mass 55 kg accelerates at a rate of 0.0255 m/s², what is the force on the wagon? (The unit of force is called the newton and it is expressed with the symbol N.)
PHYSICS
If 20 grams of hot water at $$ 80^\circ C $$ is poured into a cavity in a very large block of ice at $$ 0^\circ C, $$ what will be the final temperature of the water in the cavity? How much ice must melt in order to cool the hot water down to this temperature?
PHYSICS
One mole of an ideal gas does 3 000 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm and volume of 25.0 L. Determine (a) the initial volume and (b) the temperature of the gas.
PHYSICS
Find the electrostatic energy of eight equal charges $( + 3 \mu \mathrm { C } )$ each fixed at the corners of a cube of side 2 cm.
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