Answer:Velocity, one of the most frequently used tools for evaluating pitchers, represents the maximum speed of a given pitch at any point from its release to the time it crosses home plate.
Explanation:Velocity, one of the most frequently used tools for evaluating pitchers, represents the maximum speed of a given pitch at any point from its release to the time it crosses home plate.
Answer:
its atomic number is 92 and its atomic mass is 238(92+146).
Explanation:
For example,Silicon has 14 protons and 14 neutrons.its atomic number is 14 and its atomic mass is 28
Hydrogen bonding occurs between polar molecules that have a hydrogen atom that is directly bonded to a nitrogen, an oxygen, or a fluorine atom. That creates an extremely polar molecule with a permanent net dipole moment.
A hydrogen bond (or H-bond) is a primarily electrostatic force of attraction between a hydrogen (H) atom which is covalently bound to a more electronegative "donor" atom or group, and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor (Ac). Such an interacting system is generally denoted Dn–H···Ac, where the solid line denotes a polar covalent bond, and the dotted or dashed line indicates the hydrogen bond.The most frequent donor and acceptor atoms are the second-row elements nitrogen (N), oxygen (O), and fluorine (F).
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There are several differences between a physical and chemical change in matter or substances. A physical change is a substance that doesn't change what the substance is, a chemical change on the other hand is when there is a chemical reaction, a new stubstabce is formed and energy is either given off or absorbed.
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