How much meters is a mile

The ratio of carbon-14 to nitrogen-14 is an artifact is 1:3. Given that half-life of carbon-14 is 5730years, how old is the arti

dusya [7]

Answer:

9155 years old

Explanation:

We use the following expression for the decay of a substance:

$N = N_0\,\,e^{-k*t}$

So we first estimate the value of k knowing that the half-life of the C14 is 5730 years:

$N = N_0\,\,e^{-k*t}\\N_0/2=N_0\,\,e^{-k*5730}\\1/2 = e^{-k*5730}\\ln(1/2)=-k*5730\\k= 0.00012$

so, now we can estimate the age of the artifact by solving for"t" in the equation:

$1/3=e^{-0.00012*t}\\ln(1/3)= -0.00012*t\\t=9155. 102$

which we can round to 9155 years old.

5 0

3 years ago

What weighs more a mole of feathers or bricks?

harkovskaia [24]

Avogadro's mole is a number, like 6.023 *10^23

your question is the equivalent of asking if 100 feathers or 100 bricks weigh more

the mole of bricks would weigh more

6 0

2 years ago

Based on the image, which is not a wavelength?

ki77a [65]

The distance that is not a wavelength in the image is C to E.

<h3>What is wavelength?</h3>

Wavelength is the distance between two successive crests or two successive trough or crest to trough.

It is also the distance over which the wave's shape repeats.

Based on the image, the following are wavelengths;

A to E, this is wavelength because it is between a crest and a trough.
B to F, this is wavelength because it is between two successive crest.
D to H, this is wavelength because it is between two successive trough.

Thus, the distance that is not a wavelength in the image is C to E.

Learn more about wavelength here: brainly.com/question/10728818

4 0

2 years ago

A 310-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,190 A. If the conductor is copper

Zolol [24]

Answer:

t = 141.55 years

Explanation:

As we know that the radius of the wire is

r = 2.00 cm

so crossectional area of the wire is given as

$A = \pi r^2$

$A = \pi(0.02)^2$

$A = 1.26 \times 10^{-3} m^2$

now we know the free charge density of wire as

$n = 8.50 \times 10^{28}$

so drift speed of the charge in wire is given as

$v_d = \frac{i}{neA}$

$v_d = \frac{1190}{(8.50 \times 10^{28})(1.6 \times 10^{-19})(1.26\times 10^{-3})}$

$v_d = 6.96 \times 10^{-5} m/s$

now the time taken to cover whole length of wire is given as

$t = \frac{L}{v_d}$

$t = \frac{310 \times 10^3}{6.96 \times 10^{-5}}$

$t = 4.46 \times 10^9 s$

$t = 141.55 years$

6 0

3 years ago

What is a bright streak of light that results when a meteoroid burns up in earth's atmosphere?

CaHeK987 [17]

<span>When a meteoroid passes through Earth's atmosphere it's traveling very fast. The friction of the air makes gets the surface so hot it begins to burn or glow red</span>

4 0

3 years ago