Why do sandy beaches form at many sea shores?

A.
Sunlight reacts with organic content of coastal soil to form sand.
B.
Calcite in coastal soil is dried and bleached in the sun to form sand.
C.
Waves deposit fine sediments from weathered coastal rocks on the shore.
D.
Sand is produced when sea salt and crushed shells mix with coastal soil.
E.
The iron on sea shores reacts with oxygen to form yellow sand.

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Predict the reactants of this chemical reaction. that is, fill in the left side of the chemical equation. be sure the equation you submit is balanced. (you can edit both sides of the equation to balance it, if you need to.) note: you are writing the molecular, and not the net ionic equation. > cacl2(aq) + h20(l)