4 years ago

What element from the periodic table produces blue color in fireworks

Physics

2 answers:

Ket [755]4 years ago

6 0

The answer is copper/cu/#29

sattari [20]4 years ago

4 0

The answer is going to be element #29 Copper makes blue
Red:#38
Green:#56
Pink:#3
Yellow:#11
Gold:#20
Hopes This Helps

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According to this graph, which statement describes how the amount of iron changes over time in the reaction

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The graph shows the production of Fe.
You can see from the graph that it increases rapidly and then slowly increases.
The answer is (A).

Cheers.

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3 years ago

In electricity distribution, why is low voltage safer for consumers?

RUDIKE [14]

Answer:

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3 years ago

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3 years ago

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sweet [91]

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3 years ago

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When at rest, a ruler has a length of 12.0 inches. How fast (in m/s) must the ruler fly past you in order for it to shorten to 6

PIT_PIT [208]

Answer:

2.598× $10^8 m/sec$

Explanation:

The length of the contraction is given by $l=l_0\sqrt{1-\frac{v^2}{c^2}}$ here $l_0$ is length of the ruler at rest which is given as 12 inches

l is the length of the ruler in moving condition which is given as 6 inches c is the speed of the light and v is the velocity of the ruler.

$l=l_0\sqrt{1-\frac{v^2}{c^2}}$

$\frac{l}{l_0}=\sqrt{1-\frac{v^2}{c^2}}$

$1-(\frac{l}{l_0})^2=\frac{v^2}{c^2}$

$1-(\frac{6}{12})^2=\frac{v^2}{c^2}$

$0.866=\frac{v}{c}$

$v=0.866\times 3\times 10^8=2.598\times 10^8 m/sec$

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3 years ago