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3 years ago

What is the pH of skin

1 answer:

7 0

Your skin is fairly acidic, which helps it ward off the advances of harmful bacteria and fungi. The optimal of pH of human skin is 5.5, and you can measure it with a piece of litmus paper. You sweat with the sebum on your skin to form something called an acid mantle, which has a pH of 4 to 5.5.

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Describe the experiment, to show that light intensity, water, chlorophyll, and cabondioxide are needed for photosynthesis

lisov135 [29]

Answer:

Is light needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. a. cut the leaf in 2

b. 1 part in an opaque box and 1 part in a transparent box (one with light and one without)

3. Test for starch (BEWI)

B. Is carbon dioxide needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. a. cut the leaf in 2

b. 1 part in a box with CO2 absorber and 1 part in box with a CO2 provider

3. Test for starch (BEWI)

C. Is chlorophyll needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. Use a variegated leaf

3. Test for starch (BEWI)

B E W I

1. Put leaf in boiling water to destroy the cell membrane and denature enzymes

2. Ethanol in a hot water bath to remove chlorophyll

3. Warm water to soften the leaf

4. Add drops of iodine solution

Explanation:

3 0

3 years ago

What happens after we die?

Maslowich

Answer: Our bodies stay fresh for a short period time, then enter <em>rigor mortis</em>, then began the slow process of decomposition.

Explanation:

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3 years ago

State Newton's 2nd law of Motion:at sentence or 2 plz

natta225 [31]

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

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3 years ago

Which of the following would increase density?

faust18 [17]

B) Density (keyword dense) is used to describe something thicker or more filled with. If you make a ball smaller aka decrease its mass and make it thicker aka volume It would make it a lot denser than before

3 0

3 years ago

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A man is 1.7 long. An amoeba is 17 μm long. How does the length of the man compare to the length of the amoeba?

Sergio039 [100]

Answer:

The length of a human being and a amoeba is not comparable. Both are two different kinds of organisms with different life forms with a least resemblance. ... There is no comparison between their lengths

Explanation:

8 0

3 years ago

Read 2 more answers