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
tia_tia [17]
4 years ago
15

5. Radioactive isotopes can be used to find the age of rocks, fossils, or other artifacts. Carbon 14 has a half-life of 5,730 ye

ars. Suppose a sample of charcoal from
a primitive fire pit contains one eighth of its original amount of carbon-14. How old is the sample?
A. 716 years
B 17,190 years
C. 22,920 years
D.45,840 years
Physics
1 answer:
horrorfan [7]4 years ago
7 0

Answer:

A

Explanation:

Cuz i smart

You might be interested in
You are in a car moving forward at 12 m/s. You throw a ball in the direction the car is moving. From your point of view, what do
4vir4ik [10]

Answer: it goes the same speed as the car

Explanation:

3 0
3 years ago
A mass of 100 g stretches a spring 5 cm. If the mass is set in motion from its equilibrium position with a downward velocity of
Rudiy27

Answer:

Explanation:

Given

mass of spring m=100\ gm

extension in spring x=5\ cm

downward velocity v=70\ cm/s

Position in undamped free vibration is given by

u(t)=A\cos \omega _0t+B\sin \omega _0t

where \omega _0^2=\frac{k}{m}

also \frac{k}{m}=\frac{g}{L}

\omega _0^2=\frac{k}{m}=\frac{9.8}{0.05}

\omega _0=14

u(t)=A\cos(14t)+B\sin(14t)

it is given

u(0)=0

u'(0)=70\ cm/s

substituting values we get

A=0

u(t)=B\sin (14t)

u'(t)=14B\cos (14t)

70=14B

B=\frac{10}{2}

B=5

u(t)=5\sin (14t)

3 0
4 years ago
A pitcher can throw a fastball that reaches home plate at 95 mph. What is this speed in m/s
Taya2010 [7]
42.47 meters per second
5 0
3 years ago
Which example identifies a change in motion that produces acceleration?
kifflom [539]
Acceleration is the rate at which an object changes its velocity. It defines how much the velocity is changing. The acceleration can be negative and positive. Negative acceleration is when the object slows down, while positive while the object goes faster.
<span>A ball moving at a constant speed around a circular track produces acceleration. </span>
6 0
3 years ago
Read 2 more answers
Nora walks down a street and sees a ball dropped from a building
Grace [21]
It is gravity¿ what is the question?
5 0
4 years ago
Other questions:
  • If a 2.00kg ball is thrown straight upward and its maximum height is 25.51. what is the value of KE?
    13·1 answer
  • Persuade a pet owner, who owns a 25kg dog, to restrain the pet while it is riding in the back of a pickup truck. INCLUDE 1st and
    11·1 answer
  • A new "smart" refrigerator has been designed with sensors that send information to the manufacturer about the refrigerator's use
    15·1 answer
  • What is a standard with measuremen?
    10·1 answer
  • The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 20 m radius
    9·2 answers
  • The distance around the block is equal to 3000 feet, how many blocks would you have to run to run a total of a mile?
    5·1 answer
  • What causes turbulence?
    13·1 answer
  • Please help me
    12·1 answer
  • I really need help on this question, i cant figure out how to answer it, i really need help, everything is due tmrw, pls help
    11·2 answers
  • Find the acceleration of the blocks in figure if friction forces are negligible. What is the tension in the cord connecting them
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!