Motion

a.) a change in speed over a certain amount of time.

b.)a change in position over a certain amount of time.

c.) a change in direction.

d.) a reference point.

Alarge marble is dropped in a graduated cylinder with 35ml of water in it.the water level increases to 49ml.what is the volume of the marble

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon