Answer:
The density of the substance is 2, 14 g/ml.
Explanation:
The density (δ) of a substance is the relationship between its mass and its volume. It is calculated in this way:
δ= m/v= 75 g/ 35 ml= <em>2, 14 g/ml</em>
Frost wedging - water expands about 9% after freezing this pushes against the rock and fractures or breaks it open.
thermal expansion - <span>is the tendency of matter to change in shape, area, and volume in response to a change in temperature.</span>
Answer:
The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks.
<h2>
Please mark me as brainliest</h2>
Answer:
Letter B - Electrolytes.
Explanation:
Nerve signal conduction and muscle contraction depend on electrolyte balance to occur.
Sodium, potassium, and chlorine, for example, are typical electrolytes found in the body that are present in the nerve impulse due to the process of cellular depolarization.
Basically, for the conduction of the nerve signal to happen, it must happen the depolarization of nerve cells that control muscle contraction and in this process, there is mainly sodium and potassium change, while for actin-myosin system activation and finally muscle contraction, We mainly need calcium.
So, in general, an electrolyte balance is required during both processes.
