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tatiyna
2 years ago
15

A term used to describe water that is safe to drink?

Physics
1 answer:
Lera25 [3.4K]2 years ago
8 0
The Safe Drinking Water Act<span> (SDWA) is the federal law that protects public </span>drinking water<span> supplies throughout the nation. Under the SDWA, EPA sets standards for </span>drinking water<span> quality and with its partners implements various technical and financial programs to ensure </span>drinking water<span> safety.</span>
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If an unknown element has a mass of 17 and contains 6 neutrons, how many protons does it have ?
lbvjy [14]

The mass number is the total number of protons and neutrons within an atom and since we know that the unknown element has 6 neutrons, we can simply subtract the number of neutrons from the mass number to get the number of protons.

17 - 6 = 11

There are 11 protons in this unknown element.


Extra:

The number of protons (+) and electrons (-) are equal in a neutral atom so since you know that there are 11 protons you also know that there are 11 electrons. On the periodic table, the element with 11 electrons is Na or Sodium.


Hope this helps! :)

6 0
3 years ago
CAN SOME ONE HELP PLEASE :))))
Ede4ka [16]
Line c is at rest . line a is going in a positive direction . line b is going in a negative direction . line d is negative too
5 0
3 years ago
I need help plzzzz!!!!!!!!!!!!!!!!
elena-s [515]

Answer:

You were a freeloader of my questions, so I'll be one too.

4 0
3 years ago
If two monochromatic light waves undergo destructive interference, the amplitude of the resultant wave is
lesya692 [45]

Answer: The amplitude is 0. (assuming that the amplitude ot both initial waves is the same)

Explanation:

When two monochromatic light waves of the same wavelength and same amplitude undergo destructive interference, means that the peak of one of the waves coincides with the trough of the other, so the waves "cancel" each other in that point in space.

Then if two light waves undergo destructive interference, the amplitude of the resultant wave in that particular point is 0.

5 0
3 years ago
Read 2 more answers
An 4-kg ball experiences a force and accelerates at a rate of 1.5 m/s.
ANTONII [103]

Answer:

6.0 N

Explanation:

The strength of a force is expressed as the magnitude of the force in Newton.

The formula to apply here is :

Force= mass * acceleration

F=ma

Mass, m = 4 kg

Acceleration = 1.5 m/s²

Force= 4 *1.5 = 6.0 N

4 0
2 years ago
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