The mass of the products (solid and gaseous) of a fire is the same as the mass of the fuel and oxygen consumed in the fire.

true or false

Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the ground? A. Gravitational potential energy increases; kinetic energy increases. B.

Can anything block a magnet's force feild?

Which is NOT unique to each element? Select one: a. neutron number b. atomic number c. proton number d. chemical symbol

What two plates form the boundary on the western coast of Canada

What type of electromagnetic energy reflected by the moon is most easily seen by a person on earth?

A space probe produces a radio signal pulse. If the pulse reaches Earth 12.3 seconds after it is emitted by the probe, what is the distance from the probe to Earth?

Do substances that heat up quickly have high or low specific heat capacity?

A substance has a specific heat of 0.870 J/g°C. It requires 2,000.0 joules to increase the temperature of 10.0 grams of the substance from its original temperature to its final temperature. By how many degrees did the substance increase? A 87.

How many earth years does it take mars to orbit the sun

Which represents a system that is almost completely closed?