The energy needed by a system to initiate a process is called as the activation energy. It describes the minimum energy which must be available to a chemical system with potential reactants to result in a chemical reaction. Hope this answers the question.
Answer:Use a stretched Slinky to model sound waves moving through a material.When you squeeze the Slinky's coils together at one end (compression), this causes the coils in front of them to spread out (expansion). When the squeezed coils are released they spread out and squeeze the coils in front of them together. The squeezed coils in turn move forward, pushing on the coils in front of them and so on.
Squeezing the end coils gave them energy that was transferred from one end of the slinky to the other. As the energy goes through the Slinky, all the coils do not move at once, some of the coils are crowded together and some are spread apart.
Answer:
Explanation:
All viruses have a capsid or head region that contains its genetic material. The capsid is made of proteins and glycoproteins. Capsid contruction varies greatly among viruses, with most being specialized for a particular virus's host organism. Some viruses, mostly of the type infecting animals, have a membranous envelope surrounding their capsid. This allows viruses to penetrate host cells through membrane fusion. The virus's genetical material rests inside the capsid; that material can be either DNA, RNA, or even in some cases a limited number of enzymes. The type of genetic material a virus contains is used in classification, and is discussed in Virus Classification.
In addition to the head region, some viruses, mostly those that infect bacteria, have a tail region. The tail is an often elaborate protein structure. It aids in binding to the surface of the host cell and in the introduction of virus genetic material to the host cell.
a).Jill and Tom both have recessive traits for color-blindness. There is a 25% chance of their children being color-blind
b) she inherited the X chromosome from both Jill and Tom