1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vika [28.1K]
4 years ago
7

Why do our hair become grey?​

Chemistry
2 answers:
ser-zykov [4K]4 years ago
4 0

Answer:

As humans, we have melanin in our hair but as we grow the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle become a more transparent color. Our hair goes through its natural cycle of dying and regenerating, it’s more likely to grow in as gray after the age of 35. Stress can sometimes speed it up

Explanation:

Aleksandr-060686 [28]4 years ago
4 0

Answer:

As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color — like gray, silver, or white — as it grows.

You might be interested in
Olivia bought new gym shoes to play volleyball because she kept slipping when she ran in her old shoes. How will the new soles h
HACTEHA [7]
Maybe her old shoes had soft worn out bottoms and she slips in them. So her new shoes had more grip than her old ones so they kept her from falling.
6 0
3 years ago
Read 2 more answers
If a chemical has a pH of 3, how could you alter its pH value to be more basic?
Andreyy89

Answer; If a chemical has a pH of 3, how could you change its pH value to be more basic? Adding water to a chemical will dilute the acid, thus lowering the pH value to more basic.

6 0
4 years ago
Where are electrons received and donated at in a galvanic cell?
Vikki [24]

Explanation:

In a galvanic cell, the cathode is positively charged and the anode is negatively charged.

The cathode attracts electron while the anode donates or releases electrons.

Electrons received - Cathode

Electrons donated - Anode

3 0
3 years ago
Which of the following describes a solution of 1 gram of salt dissolved in 500 mL of water?
Greeley [361]

Answer:

B

Explanation:

Homogeneous= all particles are dissolved thoroughly

Solute= 1 gram of salt

Solvent= 500 mL water

8 0
3 years ago
Thorium-234 has a half-life of 24.1 days. How many grams of a 150 g sample would you have after 120.5 days?
chubhunter [2.5K]

Answer:

8.625 grams of a 150 g sample of Thorium-234  would be left after 120.5 days

Explanation:

The nuclear half life represents the time taken for the initial amount of sample  to reduce into half of its mass.

We have given that the half life of thorium-234 is 24.1 days. Then it takes 24.1 days for a Thorium-234 sample to reduced to half of its initial amount.

Initial amount of Thorium-234 available as per the question is 150 grams

So now  we start with 150 grams  of Thorium-234

150 \times \frac{1}{2}=24.1

75 \times \frac{1}{2} =48.2

34.5 \times \frac{1}{2} =72.3

17.25 \times \frac{1}{2} =96.4

8.625\times \frac{1}{2} =120.5

So after 120.5 days the amount of sample that remains is 8.625g

In simpler way , we can use the below formula to find the sample left

A=A_{0} \cdot \frac{1}{2^{n}}

Where

A_0  is the initial sample amount  

n = the number of half-lives that pass in a given period of time.

7 0
4 years ago
Other questions:
  • Clayton will mix xxx milliliters of a 10\%10%10, percent by mass saline solution with yyy milliliters of a 20\%20%20, percent by
    7·1 answer
  • Which mixtures could be separated using filtration? Check all that apply.
    8·2 answers
  • What is groundwater flow
    15·2 answers
  • What are fragments of dust, soil, salt, smoke and ash upon which water vapor condenses to make clouds
    15·2 answers
  • When mantle rocks near the radioactive core are heated, they become less dense than the cooler, upper mantle rocks. These warmer
    6·1 answer
  • What effect would thick cloud cover have on the temperature of earths surface?
    5·1 answer
  • A tank originally contains 100 gallons of fresh water. Then, water containing 0.5 lb of salt per gallon is poured into the tank
    13·1 answer
  • Give an example of a base in chemistry
    5·2 answers
  • Calculate the wavelength of radiation with a frequency of 8.0 x 10^14 Hz.
    5·1 answer
  • Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemicall
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!