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anzhelika [568]
3 years ago
9

Why copper is much more expensive than iron?

Biology
2 answers:
ozzi3 years ago
6 0
Although copper is easy to extract, it is becoming very difficult to find or obtain ores rich in copper compounds.Since rare things (in this case copper ores) are difficult to obtain, they are usually more expensive than things that are easily found (iron).
Andreyy893 years ago
4 0
Because its is a bit more rare than iron . 
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Gomez found the masses of three rocks for science project .the first rock had a mess of 19.28 grams, the second rock had a mass
ziro4ka [17]
The combined mass of rock 1 and 2 = 19.28 + 25.3
= 44.58

Difference between rock 3 and combined rocks 
= 46.3 - 44.58
= 1.72 grams

therefore, the third rock was 1.72 grams greater than the combined mass of the other two rocks. 
3 0
3 years ago
. Two important contrasts between seagulls and wild geese are
Murrr4er [49]
The two contrasts between seagulls and wild geese are migration and their sizes. One way they are similar is that they can both fly for great distances. The other way is that they are similar is that are both very large in size. The correct answer is A. 
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3 0
3 years ago
Muscle cells form tissue that create __________.
Wewaii [24]

Answer:

Muscle tissue

Explanation:

5 0
3 years ago
Improved bone regeneration through amniotic membrane loaded with buccal fat pad-derived MSCs as an adjuvant in maxillomandibular
muminat

Mesenchymal stem cells and HAM together may improve bone repair, especially in the horizontal dimension. Additionally, this technology lessens secondary bone resorption and the quantity of collected autogenous bone.

HAM:

  • Background: Human amniotic membranes (HAMs), a biological membrane with potential for cell therapy, osteogenesis, and healing, have come under the spotlight as a way to improve the results of treating bone abnormalities. The goal of the current study is to clinically evaluate the possibility of HAM loaded with stem cells from the buccal fat pad (BFSCs) as an osteogenic covering for only bone transplants to maxillomandibular bone lesions.
  • Materials and methods: The current investigation included nine patients with jaw bone abnormalities. Iliac crest bone graft with HAM covering (n = 5) and iliac bone grafts coated with HAM loaded with BFSCs (n = 4) were the two study groups that the patients were divided into. Cone beam computed tomography was carried out for radio morphometric characterization five months after the grafting and before the installation of the implant.
  • Results: The mean increase in bone width was found to be significantly greater in the HAM + BFSCs group (4.42 ± 1.03 mm versus3.07 ± 0.73 mm, p < 0.05). Further, the changes in vertical dimension were greater in the HAM + BFSCs group (4.66 ± 1.06mm versus 4.14 ± 1.03 mm, p > 0.05).

Learn more about  HAM here brainly.com/question/25199209

#SPJ4

7 0
2 years ago
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