Which of the following is true about a combustion reaction?
a. it is an endothermic reaction.
c. co2 and h20 are produced.
b. oxygen must be a reactant.
d. all of the above.

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

Heterogeneous mixture with larger particles that never settle is