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Naily [24]
3 years ago
11

What is groundwater's issue with cement?

Biology
1 answer:
stellarik [79]3 years ago
7 0

Answer:

A number of reactions may occur simultaneously in groundwater and cement-based materials, including the dissolution of portlandite that is generated from the intrusion of hydrogen ion, the increase of the concentration of calcium in the pore solution, formation of ettringite by sulfate attacking the cement, and the dissolution of Calcium–Silicate–Hydrate (CSH) gel by chloride entering the cement, and the formation of Friedel’s salt

Explanation:

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Answer:

d. it's not a fossil fuel

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3 years ago
4. ¿Por qué flota el hielo?
matrenka [14]
El hielo flota porque es menos denso que el agua líquida. Cuando se forma hielo, ocupa aproximadamente un 9% más de espacio del que ocupaba como líquido. Por lo tanto, un recipiente de 1 litro de hielo pesa menos que un recipiente de 1 litro de agua líquida y el material más liviano flota hacia
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3 years ago
in order to reduce resistance of going to bed for a young child,which of the following should not be used
FrozenT [24]

The following should not be used to reduce the resistance of going to bed for a young child.

<u>Explanation:  </u>

  • If the child feels sleepy at 10.30 pm and you want the child to sleep at 8.30 pm, never force them to the time you want them to good to bed. instead, make the time they feel sleepy as temporary bedtime.
  • Never to feed them with the heavy diet for making them fall asleep may extend the time of the digestion process or lead to stomach illness during late night.
  • Avoid stimulating high energy activities like playing outside, running around, watching exciting TV shows.  
  • Don't discuss or argue about bedtime with your child.
  • Once the child is put to bed immediately leave the room if not that will not allow the child to fall asleep soon .

3 0
4 years ago
The structure whose abnormal function is associated with Parkinson's disease is the
nlexa [21]

The structure whose abnormal function is associated with Parkinson's disease is the Basal ganglia.

When nerve cells in the basal ganglia, a region of the brain that regulates movement, are damaged or killed, it results in the most noticeable signs and symptoms of Parkinson's disease. Dopamine is a crucial brain chemical that is normally produced by these nerve cells or neurons.

Parkinson's disease (PD) is a progressive condition that affects the brain's motor neuron cells, which control how the body moves. Tremor, sluggishness, stiffness, and balance issues are symptoms of dying dopamine-producing neurons. Treatments emphasize symptom relief to free up more energy for action.

The basal ganglia and the substantia nigra, two deep regions of the brain, are affected by the degenerative, progressive disorder known as Parkinson's disease (PD).

To learn more about Parkinson's visit: brainly.com/question/13508690

#SPJ4

5 0
1 year ago
Which statement would least likely be used to describe variation?
eimsori [14]

Answer:

Variations that decrease reproductive success are more likely to be passed on.

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