Which of the following is true about the structure of an atom?

a. electrons, neutrons, and protons are made up of even smaller constituents, such as quarks and gluons.

b. an atom is not composed of smaller parts and cannot be broken down into smaller constituents.

c. atoms are composed of tiny cells that make up all forms of matter.

Express the following number in scientific notation. 0.026890 =

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.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball