Suppose that 40 mL of water is poured simultaneously into three containers, each having a different sediment. After 10 seconds, 5 mL remains atop Sediment A, 20 mL of water remains atop Sediment B, and 28 mL of water remains atop Sediment C. Water continues to seep into each of the substances. Which substance has the lowest permeability?

When the volume and number of particles of a gas are constant which of the following is also constant

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?