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3 years ago

100pts: Why was obsidian used to make scalpels?

2 answers:

8 0

Answer: Obsidian has been used as a cutting tool since the Stone Age, but modern versions of obsidian scalpels are manufactured by a Virginia archaeologist using a pressure flaking process. Each knife can be used from 10 to 20 times before being discarded, Green says. He keeps his blades in a cold sterilizing solution to preserve their sharpness.

Step-by-step explanation:

Margaret [11]3 years ago

3 0

Answer:

Research also confirms that incisions carried out with obsidian produce narrower scars and fewer inflammatory cells. This is because on cellular level, obsidian knife cuts between cells rather than tearing it in case of a steel knife, hence, a sharper cut allows the wound to heal more easily with negligible scarring.

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Can someone help me with this question ?

damaskus [11]

Tan52° = x/29

The angle of elevation is 52°, so that must be inside the tan function.

Tan is the ratio of the opposite side to the adjacent side. Jessica’s height is unknown, so we can call that x. The adjacent side of the triangle is the shadow, which is 29’m. Since tan is opposite over adjacent (remember SOH CAH TOA), the fraction must be x/29.

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2 years ago

Solve<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%20%5Ctimes%202%282%20%5Ctimes%204%29%7D%7B8%7D%20" id="TexFormula1" ti

creativ13 [48]

The answer is three you have to times the top numbers and divide

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2 years ago

Read 2 more answers

Deduce the RNA If DNA had 5 different bases, a restriction enzyme with a 4-base recognition sequence would predicted to digest t

barxatty [35]

Answer:

option (D) 625 bp

Step-by-step explanation:

Data provided in the question :

Number of different bases, B = 5

Number of base recognition sequence, n = 4

Frequency of all 5 nucleotides are same

Now,

The RNA will be deduced using the formula as:

⇒ Bⁿ

on substituting the respective values, we get

⇒ 5⁴

⇒ 625 bp

Hence, the correct answer is option (D) 625 bp

3 0

3 years ago

You are wrapping a gift box. You want to tie a ribbon around the box , so that whenever the ribbon intersects an edge of the box

Paha777 [63]

You are wrapping a gift box. The length of ribbon = length + width + height of box.

<u>Solution:</u>

Given, You are wrapping a gift box.

You want to tie a ribbon around the box, so that whenever the ribbon intersects an edge of the box, its distance to the nearest corner is 1/3 the length of the box.

We have to find how long must the ribbon be?

The figure of this problem is attached below

Now, assume we started to tie at one edge, then next we can tie at straight parallel edge, we can continue till our process ends.

Then, total length of the ribbon = length of box + width of box + height of box.

Hence, the length of ribbon = length + width + height of box.

7 0

3 years ago

What is the answer to number 23???

wariber [46]

The answer is 1 time 3/4=3/4

4 0

3 years ago