1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marta_Voda [28]
3 years ago
14

Use the Gizmo to estimate the age of each of the objects below. For these questions, each second in the Gizmo represents 1,000 y

ears.(8 pts)DescriptionAge (years)Egyptian papyrus with 63% of its original carbon-14 atomsAboriginal charcoal with 22% of its original carbon-14 atoms.Mayan headdress with 79% of its original carbon-14 atomsNeanderthal skull with 3% of its original carbon-14 atoms
Chemistry
1 answer:
ziro4ka [17]3 years ago
7 0

Answer:

Check the explanation

Explanation:

AT = A0 e(-T/H)

... where A0 is the starting activity, AT is the activity at some time T, and H is the half-life, in units of T.

Substituting what we know, we get...

0.71 = (1) e(-T/5730)

Solve for T...

loge(0.71) = -T/5730

T = -loge(0.71)(5730)

T = 1962 (conservatively rounded, T = 2000)

similarly for all

for aboriginal charcoal

0.28 = (1) e(-T/5730)

Solve for T...

loge(0.28) = -T/5730

T = -loge(0.28)(5730)

T = 7294 (conservatively rounded, T = 7000)

for mayan headdress

0.89 = (1) e(-T/5730)

Solve for T...

loge(0.89) = -T/5730

T = -loge(0.89)(5730)

T = 667 (conservatively rounded, T = 700)

for neanderthal

0.05 = (1) e(-T/5730)

Solve for T...

loge(0.05) = -T/5730

T = -loge(0.05)(5730)

T = 17165 (conservatively rounded, T = 17000)

You might be interested in
How many particles are in 3.2 mole of neon gas
Cerrena [4.2K]

There are 1.93 x 10²⁴ particles

<h3>Further explanation</h3>

Given

3.2 moles of Neon gas

Required

Number of particles

Solution

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

<em>1 mol = 6.02.10²³ particles </em>

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

So the number of particles for 3.2 moles :

N = 3.2 x 6.02.10²³

N = 1.93 x 10²⁴

or

we can describe it using Avogadro's number conversion factor

\tt 3.2~moles\times \dfrac{6.02\times 10^{23}}{1~mole}=1.93\times 10^{24}

7 0
3 years ago
Imagine a 15kg block moving with a speed of 20m/s. Calculate the kinetic energy of this block.
SSSSS [86.1K]

The kinetic energy formula is;

  • KE=\frac{m.v^2}{2}

The variable m represents the mass. Its unit is kilogram. We are informed that the mass of the object is 15kg. The variable v represents the linear velocity. Its unit is meter per second. We are informed that the linear velocity of the object is 20m/s. Let's find the kinetic energy of the object by substituting these values in the formula.

  • KE=\frac{15kg.(20m/s)^2}{2}
  • 2.KE=15kg.400m^2/s^2
  • 2.KE=(6000)kgm^2/s^2
  • KE=(3000)kgm^2/s^2=3000J
5 0
1 year ago
Which of the analogies below is a location-based analogy?
nydimaria [60]
D is the correct answrt
4 0
3 years ago
What do you observe about the movement of the particles in the medium?
horrorfan [7]

Answer:

The particles of the medium just vibrate in place.

Explanation:

As they vibrate, they pass the energy of the disturbance to the particles next to them, which pass the energy to the particles next to them, and so on. Particles of the medium don't actually travel along with the wave.

5 0
3 years ago
Read 2 more answers
Somebody please help me!! What happens when ionic bonds are formed?
xeze [42]

Answer:

The atom that loses the electrons becomes a positively charged ion, while the one that gains them becomes a negatively charged ion

5 0
2 years ago
Other questions:
  • How many colors would you see if you were analyzing a pure substance through chromatography?
    12·2 answers
  • Can someone help me please??
    12·1 answer
  • What mass of CCl4 is formed by the reaction of 5.14 g of methane with an excess of chlorine?
    14·2 answers
  • What color would a phenolphthalein solution be at ph=11 ?
    9·2 answers
  • In the following balanced reaction, what volume of a 3.0 M H2SO4 is required to completely neutralize 200.0 ml of a 2.5 M NaOH?
    11·2 answers
  • Which of the following characteristics do all unicellular organisms share?
    13·1 answer
  • What is the pH of water?
    8·1 answer
  • (100 point question)<br><br>Which of the following is an example of transmutation?
    9·2 answers
  • 2NaCl ---&gt; 2Na + Cl2<br>What are the atoms of the products ​
    11·2 answers
  • Which of the following best describes careers that use chemistry?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!