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ICE Princess25 [194]
3 years ago
12

Imagine the following scenario involving marbles as "radioactive isotopes".

Chemistry
1 answer:
sveta [45]3 years ago
8 0

Answer:

1 million years

Explanation:

The half life of a radioactive isotope refers to the time it takes for the radioactive isotope to decay to half of its original amount.

The half life of a radioactive isotope is independent of the amount of starting material. Hence, whether the amount of starting material is small or large, the half life of the substance remains the same.

Hence the half life of 2 green marbles and 500,000 green marbles is 1 million years.

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Given a fixed amount of gas help at a constant pressure, calculate the temperature to which the gas would have to be changed if
PIT_PIT [208]

Answer:

592 K or 319° C

Explanation:

From the statement of Charles law we know that the volume of a given mass of gas is directly proportional to its absolute temperature at constant pressure. Thus;

V1/T1= V2/T2

Initial volume V1 = 1.75 L

Initial temperature T1= 23.0 +273 = 296 K

Final volume V2= 3.50 L

Final temperature T2 = the unknown

T2= V2T1/V1= 3.50 × 296 / 1.75

T2 = 592 K or 319° C

4 0
3 years ago
Does the universe have air in it between the galxies in it
fenix001 [56]

Answer:

No it does not space does not have oxygen and air is caused by oxygen

hey but this was a really interesting question to ask tho

Explanation:

4 0
3 years ago
Which of the following is not a living thing A) carbon dioxide d) an amoeba c) a daisy d) a jellyfish
Artyom0805 [142]
A; Carbon Dioxide is not a living thing.
6 0
3 years ago
The speed of light is 1.86×10^5 miles per second.how many meters will light travel in 1.0 seconds
evablogger [386]

Einstein's theory of special relativity sets of the speed of light, 186,000 miles per second (300 million meters per second). ... The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light.

6 0
3 years ago
Read 2 more answers
Perform the calculations and determine the absolute and percent relative uncertainty. Express each answer with the correct numbe
Lana71 [14]

Answer:

Explanation:

Given the equation:

\implies \dfrac{[9.8(\pm0.3)-2.31(\pm 0.01)]}{8.5(\pm0.6)}

The absolute uncertainty in a measurement is the term used to describe the degree of inaccuracy.

The first step is to determine the algebraic value on the numerator.

Algebraic value = 9.8 - 231

= 7.49

The absolute uncertainty = \sqrt{(abs. uncertainty_{v_1})^2+(abs. uncertainty_{v_2})^2}

absolute uncertainty = \sqrt{(0.3)^3 + (0.01)^2}

= \sqrt{0.09 + 0.0001}

= 0.300167

∴

[9.8(±0.3) - 2.31(±0.01)] = 7.49(±0.300167)

The division process now is:

\implies \dfrac{[9.8(\pm0.3)-2.31(\pm 0.01)]}{8.5(\pm0.6)}= \dfrac{7.49 (\pm 0.300167)}{8.5 (\pm0.6)}

Relative uncertainty = \dfrac{(\pm 0.300167)}{7.49}\times 100  \ , \  \dfrac{(\pm 0.6) }{8.5} \times 100

Relative uncertainty = ±4.007565% ,  ±7.058824%

\text{Relative uncertainty} = \sqrt{(4.007565)^2+(7.058824)^2}

\text{Relative uncertainty} = \sqrt{16.06057723+49.82699626}

\text{Relative uncertainty} = \sqrt{65.88757349}

\text{Relative uncertainty} = 8.117116

≅ 8%

The algebraic value = \dfrac{7.49}{8.5}

= 0.881176

≅ 0.88

The percentage of the relative uncertainty =\dfrac{\text{Absolute uncertainty }}{\text{calculated value} }\times 100

By cross multiplying:

\text{Absolute uncertainty} (\%) = \dfrac{\text{relative uncertainty} \times \text{calculated value}}{100}

\text{Absolute uncertainty} (\%) = \dfrac{8.117116\times 0.881176}{100}

\text{Absolute uncertainty} (\%) = 0.0715260

\mathbf{\text{Absolute uncertainty} (\%) \simeq 0.07}

Finally:

\mathbf{\implies \dfrac{[9.8(\pm0.3)-2.31(\pm 0.01)]}{8.5(\pm0.6)}= 0.88 \pm (0.07) \pm 8\%}

8 0
3 years ago
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