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cluponka [151]
3 years ago
13

the tip of a match contains chemical energy. Kevin's father lit a match and blew out the flame. then he tried to light the same

match again . Kevin observed that nothing happened. what can you infer from this observation?

Chemistry
1 answer:
Ostrovityanka [42]3 years ago
8 0
The chemicals were used so it did not light again
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SOVA2 [1]

Answer:

C

Explanation:

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3 years ago
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A grating has 470 lines/mm. how many orders of the visible wavelength 538 nm can it produce in addition to the m = 0 order?
maria [59]

Three complete orders on each side of the m=0 order can be produced in addition to the m = 0 order.

The ruling separation is

d=1 / (470mm −1) = 2.1×10⁻³ mm

Diffraction lines occur at angles θ such that dsinθ=mλ, where λ is the wavelength and m is an integer.

Notice that for a given order, the line associated with a long wavelength is produced at a greater angle than the line associated with a shorter wavelength.

We take λ to be the longest wavelength in the visible spectrum (538nm) and find the greatest integer value of m such that θ is less than 90°.

That is, find the greatest integer value of m for which mλ<d.

since  d / λ = 538×10⁻⁹m / 2.1×10 −6 m ≈ 3

that value is m=3.

There are three complete orders on each side of the m=0 order.

The second and third orders overlap.

Learn more about diffraction here : brainly.com/question/16749356

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7 0
2 years ago
A thin-walled sphere rolls along the floor. What is the ratio of its translational kinetic energy to its rotational kinetic ener
ICE Princess25 [194]

Explanation:

The kinetic energy of translation

E_1=\frac{1}{2}mv^2

m= mass v= linear velocity

The kinetic energy of rotation

E_2=\frac{1}{2}I\omega^2

I= MOI of the thin walled sphere =kmR^2

where ω= v/R= angular velocity

E_2=\frac{1}{2}kmR^2\frac{v}{R}^2

Then

\frac{E_1}{E_2} = \frac{0.5mv^2}{0.5kmR^2\frac{v}{R}^2 }

=1/k

solid sphere: k=0.4;   E1/E2 =1/0.4 = 2.5;  

 hollow sphere: k=2/3;   E1/E2 = 1.5

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3 years ago
The diagrams are showing a cell undergoing a mitotic division at different points of Anaphase. Use the ABC labels on the drawing
Advocard [28]

Answer:

where is the drawing? I can't help if I can't see it sorry

7 0
3 years ago
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What mass, in grams, of chlorine gas (Cl2) is contained in a 12.5-liter tank at 27.0 degrees Celsius and 2.85 atmospheres? Show
nata0808 [166]
PV = nRT
P is pressure, V is volume, n is number of moles, R is the gas constant, T is temperature in K

(2.85 atm)(12.5 L) = (n)(.08206)(27 C + 273)

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3 years ago
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