D.) because the plastic beads are bigger than the holes in the sieve but the sand and salt are not
Answer:
3. into ice, which is denser than liquid water.
Explanation:
Water molecules are held together by hydrogen bonds. The bonding is usually between the hydrogen atoms of one water molecules, and oxygen atom of neighboring water molecules. Structurally, both oxygen and hydrogen atoms pulls the electon towards themselves.Thus both atoms share electron by covalent bonding.
However, because oxygen has a strong positively charged nucleus it pulls the electron more to itself than oxygen. Thus oxygen is partially negative and oxygen is partially positive. This interactions take place among all the oxygen and hydrogen atoms in water molecules. . The unequal charge distributions is called dipole and the attraction between oxygen and hydrogen is called hydrogen bonding .
The orientation of hydrogen and oxygen molecules from dipole -dipole interactions of hydrogen bonding makes the oxygen and hydrogen atoms in ice to be pushed apart well spaced out in ice, making them less dense than liquid water where they were aggregated. Thus from the question option C is correct.
Answer: 2.81 x 10∧14 baterias after 16 hours.
Explanation:
Hi, first we have to find how many 20 minute intervals are in 16 hours.
If 1 hour = 60 min, 16hours = 960 minutes (16 h x 60 min / 1 h)
If we divide the 960 minutes (16 hours) by 20 minutes we obtain 48. (960/48)
There are 48 twenty minutes intervals in 16 hours.
Now we have to apply the exponential growth formula:
P (t) = Po (1 +r) ∧t
Where:
P (t) = population at time t
P (0) = initial population (1)
r = growth rate (1)
t = time (48)
Replacing with the values given:
P (t) = 1 (1 + 1) ∧48= 2.81 x 10∧14
2.81 x 10∧14 baterias after 16 hours.
Cell Y.
Answer: Option C.
<u>Explanation:</u>
Prokaryotic cells are the cells that do not possess a true nucleus. They do not even possess a membrane bound organelles. Organisms with in the domains bacteria and Archaea have prokaryotic cells. The other forms of life are the eukaryotic.
It is a unicellular organism. The word prokaryotic comes from a Greek word. The prokaryotic cells have a cell membrane or a plasma membrane which acts like a protective shield. Along with this, they also have a rigid cell wall which acts like further support and protection.
Im just gonna say I hope and pray that it’s c:/
