No, cook is not a physical change, it's chemical
speed and direction in which an object is moving. both speed and direction of motion. is a vector. two or more velocities add by velocity addition.
Answer:
C) Ionic bonds
Explanation:
The ionic bonds are the strongest bond, it occurs when a metal donates electrons and a nonmetal gain these electrons. They'll be together by electrostatic force.
Metallic bonds it the second strongest bond, it occurs between metals, which loses electrons. It's an electrostatic force, but weaker than the ionic compound because it occurs between the cation and the electron.
Covalent bonds are the weakest bond. It happens between metals and nonmetals, or nonmetals and hydrogen or between atoms of hydrogen. The force that joins the atoms depends on the polarity of the molecule. Polar molecules have dipole forces, nonpolar molecules, induced dipole forces. Also, hydrogen makes special dipole forces with nitrogen, oxygen, and fluorine, called hydrogen bond.
As the stronger is the force, as difficult it will be to break it. So, ionic bonds will demand more energy to become gas, and have high melting points.
The statement above is TRUE.
The statement that is given above implies that, if a paint sample matches another known sample from a vehicle, that does not indicate that the paints come from the same source but it does show a very high probability that the paint samples come from the same object, if the compositions of the paint samples are the same.
