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KIM [24]
3 years ago
11

What is the main factor that determines if a star will become a black hole

Chemistry
1 answer:
mixas84 [53]3 years ago
6 0
<span>As a star runs out of fuel it can expand and will begin to form heavier elements such as carbon and iron (most of the matter in our solar system comes from extra-solar sources). Once it finally exhausts all of its fuel it will begin to collapse. It is here that the stars begin to undergo different fates. </span>
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Harry Hess’s explained how oceanic crust is produced and destroyed in his theory of _______
egoroff_w [7]
<span>Harry Hess’s explained how oceanic crust is produced and destroyed in his theory of </span>D. Sea floor spreading
8 0
3 years ago
(a) The absorbance of mixture at 400 nm was 0.40.
laiz [17]

Answer:

0.1 g/dl

Explanation:

The standard curve is a graph that relates the absorbance at 400 nm with the concentration of haemoglobin in mg/dl. To obtain the concentration from the absorbance value, we enter in the x-axis (absorbance at 400 nm) with the value 0.40 (the line between 0.2 and 0.6), we extrapolate the line to the curve and read the correspondent value on y-axis (concentration in mg/dl): 100 mg/dl.

So, we convert the concentration from mg/dl to g/dl by dividing into 1000:

100 mg/dl x 1 g/1000 mg = 0.1 g/dl

Therefore, the concentration of haemoglobin of the patient is 0.1 g/dl.

6 0
3 years ago
What field(s) does a moving electron have?
valentina_108 [34]

Answer:

electric field or magnetic field both are same

Explanation:

in an electromagnet the movement of electrons in a wire creates the magnetic field.an electromagnet and the permanent magnet both the magnet have the magnetic fields that can attract the same kinds of materials.

4 0
2 years ago
Which of these is a chemical property of iron?
denpristay [2]
Iron becomes rusted especially in damp air but never in a dry air,  this is one of the many unique characteristics of iron. Iron is also ductile and malleable. It is found in the seventh group of the periodic table. It has four different and unique crystalline forms and completely dissolves in dilute acids. The two chemical compounds that can be found or made from iron are the bivalent iron also known as ferrous and the trivalent iron or known as ferric compounds.
7 0
3 years ago
Read 2 more answers
During photosynthesis plants take in light energy from the sun carbon dioxide from the air and water to the roots which of the f
Genrish500 [490]

Glucose sugar and oxygen

5 0
3 years ago
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