What two factors affect the rate of acceleration of an object?

Answer: The correct answer for the blank is-

B) cytoplasm.

Cytoplasm is the fluid filled compartment ( a thick, gel like substance) within the cell of a living organism that is mainly composed of water, salts, and proteins. It is surrounded by the cell membrane ( plasma membrane) and contains all the parts of cell ( such as in eukaryotic cell, it contains all the cell organelles except nucleus). It is the site for all the essential cellular processes.

Thus, option B) is the right answer.  

Answer: Option (B) is the correct answer.

Explanation:

• In a living organism, the cell which is mostly composed of water, salts and proteins is known as cytoplasm.

It is thick and gel like in nature which has fluid filled compartment.

• A chloroplast is an organelle found in the cells of plants and eukaryotic algae which are responsible for the conduction of photosynthesis.

• Nucleus is an organelle present in eukaryotic cells. It contains hereditary information of a cell and helps in controlling the growth and reproduction of cells.

• Polymers of amino acids are known as proteins. Each protein has some specific functions.

Thus, we can conclude that out of the given options cytoplasm is a gel-like substance enclosed by the cell membrane that contains the cell's organelles.

Answer is: the density of the material is 0.8 g/cm³.

m(material) = 6.75 g; mass of unknown material.

V(material) = 9 cm³; volume of unknown material.

d(material) = m(material) ÷ V(material).

d(material) = 6.75 g ÷ 9 cm³.

d(material) = 0.75 g/cm³; density of unknown material.

Answer is: ionic bond.

Ionic bond is the electrostatic attraction between oppositely charged ions, cations (positive ions) and anions (negative ions).

For example compound magnesium chloride (MgCl₂) has ionic bond. Magnesium transfers two electrons, form positive cation Mg²⁺, to chlorine, form anion Cl⁻.

Another example, potassium bromide (KBr) is ionic solid, it has ionic bonds.