Incandescent lightbulbs have a skinny wire in the
middle called a filament.
Why is the wire in the
middle so skinny?
A. A skinny wire reduces the resistance.
B. It increases friction, which increases heat, which makes
light.
C. The skinny wire increases the conductivity.

Is this a single replacement reaction or there is no

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.