Juanita studies several free-body diagrams in which a normal force is shown. What is always true about a normal force in a free-body diagram? It is opposite the weight. It is perpendicular to a surface. It is opposite the net force. It is parallel to a surface.

Bose-einstein condensation occurs at what temperature?

How might this scientific phenomena be explained? a paper clip floats on water.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)