What force is represented by the vector? O friction
O gravity
O normal force
O push
MUM

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?