An ostrich can run at an average speed of 50 km/h. how long would it take an ostrich running at this speed to travel from seattle, wa to portland, or (assuming the two cities are about 230 km apart)?
a. 3.3 h
b. 4.1 h
c. 4.3 h
d. 4.6 h

What is the mass of 4 molecules of co2

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

What is the mass of phosphorous in a 51-kg person