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kupik [55]
3 years ago
7

Can someone help me? Idk why I can't understand this

Physics
1 answer:
olya-2409 [2.1K]3 years ago
5 0
It's been a while since I've studied this, but my answers would be:

13. 5730 years. The half-life of a substance is the amount of time it takes for half of it to decay, and, according to the graph, half of the substance remained at 5730 years.

14. 10740 years. According to the graph, only 25% of the carbon remained after 10740 years.

15. 15 atoms. According to the graph, only 12.5% of the carbon remained after 16110 years. 12.5% of 120 atoms is 15 atoms.

16. 1600 atoms. According to the graph, if a sample of carbon is 10740 years old, only 25% of it remains. To find the original amount, multiply the current amount by (100% / 25%), which equals 4. So, 4. 400 atoms * 4 = 1600 atoms is the original amount.
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I don't quite understand. Can you help please?
Darya [45]
C. It was mainly concerned about wildlife.

Birds and other wild animals can be scared away from the area. This would affect the ecosystem and the local webchains.
6 0
3 years ago
Name all the harry potter books 1-7
miss Akunina [59]

Answer:

1) Harry Potter and the Philosophers Stone (Sorcerers Stone)

2) Harry Potter and the Chamber of Scerets

3)Harry Potter and the Prizoner of Azkaban

4) Harry Potter and the Goblet of Fire

5) Harry Potter and the Order of the Phonix

6) Harry Potter and the Half-Blood Prince

7) Harry Potter and the Deathy Hallows

Explanation:

3 0
2 years ago
Read 2 more answers
If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspe
Readme [11.4K]

The true airspeed will increase and true altitude will increase.

<h3>What is true air speed?</h3>

True airspeed is the airspeed of an aircraft relative to undisturbed air.

It's the aircraft speed relative to the airmass in which it's flying.

<h3>How does outside air temperature affect air speed?</h3>

If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspeed will increase and true altitude will increase.

Thus, the true airspeed will increase and true altitude will increase.

Learn more about true airspeed here: brainly.com/question/13257916

#SPJ1

6 0
2 years ago
Help mee plss its very urgent i need this before 11 pm est
dmitriy555 [2]

Answer:

7. 2 kg

8. 0.5 kg

9. 4 kg

Explanation:

The equation is F=MA

where F is force in Newtons

M is mass in kg

A is acceleration in m/s^2

for each you substitute in the F and A, and you are finding M. Meaning you divide F by A.

M = F/A

6/3 = 2

6/12 = 0.5

20/5 = 4

6 0
3 years ago
Read 2 more answers
If the value of the electric field in an electromagnetic wave were doubled then
Norma-Jean [14]

Answer:

Electromagnetic wave are waves formed as a result of the oscillatory activities involving the electric and the magnetic field.

However in an Electromagnetic wave, the electric field and magnetic field carry equal amounts of energy and the magnitude of the electric field is directly proportional to the magnitude of the magnetic field. This direct proportionality gives rise to the speed of light being the constant between the two fields.

When the electric field is doubled then an equal action is to be set for the magnetic field so it doesn’t deviate from its main functions and characteristics.

4 0
4 years ago
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