Magnetic Forces
an object that attracts or pulls on materials that contain iron
magnet
sloth
Electric charges are from ______________ and _______________________
protons, electrons
push or pull applied to an object
force
How many degrees are in a circle?
360
like poles _____
repel
Which amphibian never sleeps?
bullfrog
force of attraction or repulsion between objects due to their charges
electric force
includes the speed and direction of and object
velocity
What is a triangle with 3 unequal sides?
scalene
Two materials other than iron that are magnetic are
cobalt , nickel
Which two countries share the longest border?
United States and Canada
opposite charges __________
attract
a force that can act at a distance
non contact force
How many feet are in a yard?
3
Strength of force between two magnets depends on
the distance between them
Who was the first female to fly an airplane?
Amelia Earhart
accumulation of excess electric charges on an object
static electricity
measure of gravitational force on an object
weight
What degree is a right angle
90
The region where the magnet is the strongest is
magnetic pole
Who invented the telephone?
Alexander Graham Bell
Electric forces increase as the _____ of the charge increases.
magnitude
The acceleration of an object depends on the mass of the object and the amount of force applied is
Newton's Second Law
What is another name for the perimeter of a circle?
circumference