Answer:
Approximately 
.
Explanation:
Let 
denote the gravitational constant. (
.)
Let 
and 
denote the mass of two objects separated by 
.
By Newton's Law of Universal Gravitation, the gravitational attraction between these two objects would measure:
.
In this question: 
is the mass of the moon, while 
is the mass of the water. The two are 
apart from one another.
Important: convert the unit of to standard units (meters, not kilometers) to reflect the unit of the gravitational constant .
.
.
Answer:
D. The state of motion of an object with mass
Explanation:
Specifically, momentum is mv, mass times velocity
Answer: The classical complement pathway for complement activation is initiated by antigen-antibody complexes with the antibody isotypes IgG and IgM.
Explanation: The classical complement pathway typically requires antigen-antibody complexes (immune complexes) for activation (specific immune response), whereas the alternative pathway can be activated by C3 hydrolysis, foreign material, pathogens, or damaged cells.
After activation, a series of proteins are recruited to generate C3 convertase, which cleaves the C3 protein. The C3b component of the cleaved C3 binds to C3 convertase to generate C5 convertase, which cleaves the C5 protein. The cleaved products attract phagocytes to the site of infection and tags target cells for elimination by phagocytosis. In addition, the C5 convertase initiates the terminal phase of the complement system, leading to make appear the membrane attack complex. The membrane attack complex creates a pore on the target cell's membrane, inducing cell lysis and death.
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