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IgorLugansk [536]
3 years ago
13

Which of the following energy does NOT travel as a wave?

Chemistry
1 answer:
frosja888 [35]3 years ago
3 0

Answer:

Wind

Explanation:

It's impossible for them to travel in a wave.

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Which statement is true about heat and light energy?
GarryVolchara [31]

Answer:

I think it's a or c let me look at it one more time hold on!!

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A piece of glass with a mass of 32.50 g specific heat of 0.840 J/g*°C and an initial temperature of 75 °C was dropped into a cal
elixir [45]
Hey there,

119.84 degrees c is your answer.

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[BrO- ]initial is 0.56 M. 33 seconds later [BrO- ] is 0.14 M. What is the rate of change of [BrO- ] in M/s? (The brackets, [ ],
iVinArrow [24]

Answer:

0.013 M/s

Explanation:

Given data

  • Initial concentration of BrO⁻: 0.56 M
  • Final concentration of BrO⁻: 0.14 M
  • Time (t): 33 s

Since the final concentration of BrO⁻ is lower than the initial concentration of BrO⁻, BrO⁻ is dissapearing. The rate of dissapearance of BrO⁻ is:

rBrO⁻ = - Δ [BrO⁻] / t

rBrO⁻ = - (0.14 M - 0.56 M)/ 33 s

rBrO⁻ = 0.013 M/s

3 0
3 years ago
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An isotope of Cesium -137 has a half-life of 30 years. If 1.0 g of Cesium – 137 disintegrates over a period of 60 years, how man
Nady [450]

Answer:

Explanation:

Radioactive decay follows the equation:

Ln [A] = -kt + ln [A]₀

<em>Where [A] is amount of isotope after time t: Our incognite,</em>

<em>k is rate constant: ln 2 / Half-life = 0.0231 years⁻¹</em>

<em>t are 60 years</em>

<em>[A]₀ is initial amount of isotope: 1.0g</em>

<em />

Replacing:

Ln [A] = -kt + ln [A]₀

Ln [A] = -0.0231 years⁻¹*60 years + ln 1.0g

ln [A] = -1.386

[A] = 0.25g

<em />

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3 years ago
Which of the formed elements is present in the greatest concentration??
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<span>In the blood erythrocytes are present in the greatest concentration</span>
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