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Hoochie [10]
3 years ago
15

What man tapped out of the following message in 1844: "What God Hath Wrought?"

Geography
1 answer:
Ad libitum [116K]3 years ago
4 0
A. Samuel Morse tapped it out in a demonstration to Congress.
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Is this homework? do you need me to click the link or anything??

4 0
3 years ago
Examine the map you created in the first task and note any patterns that might show how climate and physical features impact one
lara [203]

Answer:

You need to provide an image of your map to get an answer

3 0
3 years ago
On a farm that is quickly losing its topsoil to erosion, what are the possible
Korolek [52]
I think the answer is B, because it was left unprotected in the wind
3 0
3 years ago
Read 2 more answers
Need help asap!
slava [35]

More than 75 percent

Explanation:

Let us carefully analyze this problem:

The half life of the rubidium isotope = 50 billion years

   The half-life of a radioactive isotope is the time it takes for it to decay to half of its original amount.

  Every 50years, we know that a rubidium isotope would split into half.

Initially when the isotope was formed, we would only have the parent atoms there. There wont be any daughter;

  ratio of parent to daughter = 100 : 0

When the isotope decays to half; we would have equal number of parent and daughter:

  ratio of parent to daughter at half life = 50 : 50

The age of the earth is about 4.6billion years;

this is;

          \frac{4.6}{50} x 100 = 9.2% of the half-life of the rubidium isotope.

At this time, we should know that only 9.2 percent of the daughter would have been formed.

The remaining parent would be 100 - 9.2 = 90.8% would still be left undecayed.

The ratio of parent to daughter  = 90.8 : 9.2

This is more than 75% of the parent

learn more

Radioactive decay brainly.com/question/10125168

#learnwithBrainly

4 0
3 years ago
How far is Perth from Ireland
Arada [10]
There are many ways to measure distance between Perth and Ireland.
First of all, you should know what kind of distance you want to measure: absolute or relative? this means wither it is in a straight line (which might not be suitable for actually doing it in terms of traveling), or relative, and you would be considering possible routes (boat, plane..).
Secondly, you must choose the point in Ireland.
You can use some online tools that help you with measuring distances. An example is:
https://www.freemaptools.com/how-far-is-it-between-Belfast_Northern-Ireland-and-Perth_Australia.htm
You can then change the cities.

Hope this helps.
 
8 0
3 years ago
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