What is the best way to test Newtons Second law: F=MA Allow the same object to roll down the same hill at the timing the rate 3 times.
Allow different massed objects to roll down the same hill timing the rate each time.
Allow three different massed objects to roll down three different hills timing the rate each time.
Push three different massed people with three different forces and time their rates.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

conservation of mass

mass before something happens = mass afterwards

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y