PHYSICS MIDDLE SCHOOL

F has _valence electrons.
02
OOO
9
19

Answers

Answer 1
Answer: As far as I know it's 7

Related Questions

Suppose the initial kinetic energy and final potential energy in an experiment are both zero. What can you conclude? A. The final kinetic energy is zero. B. The initial potential energy is zero. C. The final kinetic energy is equal to the initial potential energy. D. The sum of the initial and final kinetic energies is zero.
Compare and contrast ultraviolet light with infrared light using wavelength, frequency, and energy.
Which of these is studied using science? a. thirteen is an unlucky numberb. finding a four leaf clover is luckyc. breaking a mirror brings bad weatherd. sudden fall in air pressure affects weather
Each element is made up of only one kind of_________
How does an object behave in differents liquids?

Two or more waves combining to produce a wave with a smaller displacement is called _____. A. constructive diffraction

B. constructive interference

C. destructive interference

D. destructive diffraction

Answers

Two or more waves combining to produce a wave with a smaller displacement is called destructive interference .

What is the definition of destructive interference?

Destructive interference happens when the maxima of two waves are 180° out of phase a positive displacement of one wave is canceled exactly by a negative displacement of the other wave.

The formula for brighter patches resulting from constructive interference and darker patches resulting from destructive interference in a diffraction grating is:

\rm d sin \theta = n \lambda

Two or more waves combining to produce a wave with a smaller displacement is called destructive interference .

Hence, option C is correct.

To learn more about destructive interference refer to the link;

brainly.com/question/16098226

#SPJ2

destructive interference occurs when two or more waves combine to make a wave with a smaller amplitude C is your answer my friend :)

In a solution, the substance that does the dissolving is called Blank Space __________.solute


solvent


saturated


precipitate

Answers

The answer is Solvent. The reason is in the wording, 'the substance that does the dissolving.' A solvent does the dissolving, a solute is something that can be dissolved.

Answer:

solvent

Explanation:

Explain why the air we breathe and solids, such as steel and bronze, are solutions or homogeneous mixtures, just like salt water is ?

Answers

Answer:

Explanation:

There are two major types of mixtures; homogeneous and heterogeneous mixtures.

Homogeneous mixture is a mixture in which its constituent particles are evenly distributed throughout the mixture. Examples are steel, bronze and air (as stated in the question). While heterogeneous mixture is a mixture in which it's constituent particles are not evenly distributed throughout the mixture. Example includes sand and water solution.

Salt water is an homogeneous mixture because the percentage of salt in a sample of salt from a particular mixture is the same in every other sample (of the same volume) of the same mixture.

From the above, we can deduce that air is an homogeneous mixture because a sample of air (in a particular area) will contain the same constituent by proportion as another sample of air (in the same area). This means that the percentage of oxygen, nitrogen, carbon dioxide, water vapour, argon and other substances in one sample of the air will be equal to the percentage of this constituents in the other sample of the air.

Same can be said about steel and bronze. For steel, each gram of the same steel will contain the same percentage of carbon and iron. And also, each gram of the same bronze will contain the same percentage of copper, tin and other metals present.

For better understanding, let's consider an heterogeneous mixture. A mixture of sand and water solution cannot have the same proportion throughout, this is because sand particles in some samples (of a particular volume) of a particular mixture will be different from sand particles in some other samples (of the same volume) of the same mixture.

Because you can't physically see the difference.

Question is the image

Answers

Answer:

1=ser

2=both

3=par

4= both

Explanation:

Electric resistance ____________ with a(n) ____________in the length of a wire and as a result current flow ___________.A) decreases; decrease; increases
B) decreases; increase; increases
C) increases; decrease; decreases
D) increases; increase; decreases

Answers

The answer is D. Electric resistance increases with an increase in the length of a wire and as a result current flow decreases. There is a direct relationship between the length of the wire and the resistance. The longer the wire, the more resistance there will be. Additionally, from Ohm's Law, current is inversely proportional to resistance. This means as the current increases, resistance decreases or vice versa.

The process of _____________ is modeled in the plant cell diagrams seen here. A) osmosis B) tonicity C) active transport D) facilitated transport

Answers

Answer:

A) Osmosis

Explanation:

The process of osmosis is modeled in the cell diagram

Answer:

osmosis

Explanation:

never heard of the other terms in my 7th grade brain
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