For the girl to lift this rock, she must push her end down to raise the rock . A. a lot; a little B. a little; a lot C. a little; a little

List the two type of transporst that the cell in orde to transport molecules acroos the membrane

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?

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?