All of the above. RESULTS BOX: 4.Which of the following is an infinite set? {integers} {states in the US} {alphabet} None of the above. RESULTS BOX: 5.Which of the following is an empty (null) set? {tiger, lion, puma, cheetah, leopard, cougar, ocelot} ...
Force is a push or pull. ... There are only four fundamental forces in the Universe. ... Lets learn more about the last two.
It can also occur at a molecular level, due to changes in the orientation of electrically polar molecules in response to an applied field, or through bending & stretching of the bonds between atoms within a molecule, very much like the material in a mechanical spring is bent or stretched. P...
The sun is a G-type, main-sequence star. This means that it is a white dwarf star (appearing yellow when viewed from our atmosphere) that is in the middle of its life, currently fusing hydrogen atoms into helium in its core. Why is the sun a dwarf star? The sun is a main-sequence...
Some energy is stored and potential, while others are kinetic and in motion. For example, heat is a type of kinetic energy in that particles of matter are in vibrating motion while heated, and nuclear energy is a kind of potential energy stored in the nucleus of atoms....
Inside the nucleus of some atoms, protons appear to be doing very unexpected things. They are pairing up far more often than usual when they get extremely close to each other, and physicists don’t fully understand why. Getting to the bottom of this phenomenon could help us bett...
How many types of atoms can you expect to find in a pure sample of any element? Purity: Purity is a property of any substance that denotes the uniformity of its atomic species. When a substance is said to be pure, then this means that the sample is free of impurities...
Radiation from the higher-energy end of the ultraviolet spectrum, in addition to X-rays and gamma rays, is known as ionizing radiation: It is energetic enough to be able to knock electrons off of atoms, turning the atoms into ions. Ionizing radiation can damage DNA and cause a multitude of...
Heat energy may be lost during this process in an exothermic reaction, or it may be absorbed in an endothermic reaction. Each of the types of reactions involves an overall energy change as well as the rearrangement of atoms/molecules. The rearrangement creates the products of the reaction. The...
}}\). He developed the theory that the universe was made up of tiny, indivisible particles known as atoms. In \(1808\), an English scientist named John Dalton proposed that an atom is the fundamental unit of matter.For example, Break up a small piece of zinc into smaller pieces. All ...