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postnew [5]
3 years ago
15

Electro magnetic waves are blank waves What’s the blank PLEASE HELP DUE IN 25 MINUTES!!!!

Chemistry
1 answer:
Sav [38]3 years ago
3 0

Answer:

Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. Hope it helps ;)

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Complete the questions below using the following diagram.
Vadim26 [7]

Answer:

atomic number- 42

chemical number- 96

number of protons-18

atomic mass-96

number of eletrons-42

number of valence eletrons- 1, 2, 13, or 18. (sorry i forgot)

nummber of shells in n=3 shell-18

number of neutrons-54

Explanation:

well i just know the periodic table by heart and thats how i got the answer XD

5 0
3 years ago
Catie set a glass of hot water and a glass of cold water on the kitchen table and let them sit for one hour. How will the partic
Elis [28]

Answer:

C.The particles in the hot water will slow down, while the particles in the cold water will speed up

Explanation:

Heat causes changes in the molecules of substances when applied to them. The molecules of water, as a case study used in this question, when heated has an increased kinetic energy which causes its particles to move faster i.e. speed up. Also, when water is freezed or cold, it's particles move slower i.e. slow down due to decreased kinetic energy.

Hence, when a hot glass of water and a cold glass of water are placed on a kitchen table for 1 hour, they don't remain in their respective thermal state.

- The hot water (with an increased movement of molecules) begin to cool down, hence, its particles slows down as it gets cold or less hot.

- Likewise, the cold water (with a decreased movement of molecules) begins to get warmer, hence, it particles speedens up as it gets warmer.

Therefore, The particles in the hot water will slow down, while the particles in the cold water will speed up

5 0
3 years ago
How many valence electrons are in the Lewis structure of Methane (CH4)?
ladessa [460]

I'm pretty sure that is correct too

Because Carbon has 4 VE and you have 4 atoms of hydrogen, each hydrogen atom has 1 VE (4 atoms = 4 VE)

4 + 4= 8 so yeah

4 0
3 years ago
Read 2 more answers
What is the period of a wave with a frequancy of 3 Hz and an amplitude off 0.01
lara31 [8.8K]

0.33 seconds is the period of a wave with a frequency of 3 Hz and an amplitude off 0.01 .

<u>Explanation:</u>

We have , period of a wave with a frequency of 3 Hz and an amplitude off 0.01 . We know that period of a wave is amount of time needed to complete one oscillation . In order to calculate period of wave we use frequency and the formula use is period = \frac{1}{frequency} . We are given that frequency = 3 Hz:

period = \frac{1}{frequency}

⇒ period = \frac{1}{frequency}

⇒ period = \frac{1}{3 Hz}

⇒ period = 0.33 seconds

Therefore, 0.33 seconds is the period of a wave with a frequency of 3 Hz and an amplitude off 0.01 .

4 0
3 years ago
Minerals with the silicon-oxygen structure shown in Figure 2-1 are classified into what group?
egoroff_w [7]
B----------- oxide is the correct answer
6 0
3 years ago
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