science

in E=mc2 E means?

• Centimeters

• Energy

• Mass

• Light

CO2 laser is a type of

• Solid Laser

• Liquid Laser

• Molecular Gas Laser

• Semiconductor Laser

Motion is a change in ___.

• time
• speed
• velocity
• position

Which state of matter has tightly packed particles?

• solid

• liquid

• gas

What is matter?

• anything that has mass and takes up space

• anything that can be felt

• anything that can behave in many different ways

• anything that exist on Earth

A gas

• has a definite shape but no definite volume

• has a definite volume but no definite shape

• has fast-moving particles

Define a liquid.

• Indefinite shape, indefinite volume
• Definite shape, definite volume
• Found in stars
• Definite volume, indefinite shape