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
madam [21]
3 years ago
6

Please help me I need these extra credit points plz plz plz

Physics
2 answers:
KengaRu [80]3 years ago
6 0

Answer:

2 half lives have passed, the rock layer is 4,000 years old

Explanation:

It takes 2,000 years for half of the 400 atoms to decay which leaves you with 200 atoms. It then takes another 2,000 years for half of the 200 atoms to decay with leaves you with 100 atoms after a total of 4,000 years and 2 half lives.

VashaNatasha [74]3 years ago
5 0
Two half lives so it is 4000 years old
You might be interested in
A uniform plane wave traveling in air is incident upon a flat, lossless, and infinite in extent dielectric interface with a diel
dexar [7]

Answer:

Check the explanation

Explanation:

Kindly check the attached images below to see the step by step explanation to the question above.

3 0
3 years ago
What makes psychoanalysis different from behaviorism?
svp [43]
Psychoanalysis is a form of therapy that treats mental disorders through different ways, such as dream interpretation. It is a way of looking into the line between conscious and <span>unconsciousness </span>

Behaviorism is a theory that says that mental disorders are treated better with altering the persons behavior patterns.

I think they're different because behaviorism is just simply a theory and not actually a form of therapy.

Hopefully that helps you tell them apart!



4 0
3 years ago
What causes irregular galaxies to be irregular
Mariulka [41]

Irregular galaxies get their odd shapes in many ways. One way irregular galaxies are formed is when galaxies collide or come close to one another, and their gravitational forces interact. Another source of irregular galaxies may be very young galaxies that have not yet reached a symmetrical state.

8 0
3 years ago
Read 2 more answers
PLS HELP!!! WILL GIVE BRAINLIEST
grandymaker [24]

Answer:

did you ever get the answer

8 0
2 years ago
Read 2 more answers
What term best describes the difference in colors of the birds below?
katrin [286]
Just tryna get points points points points points points
5 0
3 years ago
Other questions:
  • Why does the gravitational field strength increase with latitude
    13·1 answer
  • Which point on the pendulum's swing represents the minimum potential energy?
    13·2 answers
  • What causes the disease bronchitis?
    8·1 answer
  • If bert the bat traveles eastward at 40 mph with a tail wind of 6 mph,what is his actual speed?
    5·1 answer
  • If the CD rotates clockwise at 500 rpm (revolutions per minute) while the last song is playing, and then spins down to zero angu
    12·2 answers
  • Why are fossil fuels like coal, oil, and natural gas<br> called nonrenewable resources?
    10·1 answer
  • A carousel - a horizontal rotating platform - of radius r is initially at rest, and then begins to accelerate constantly until i
    5·1 answer
  • What factors affect the chemical properties of seawater
    15·1 answer
  • You throw a ball straight up with an initial velocity of 15.0 m/s. It passes a tree branch on the way up at a height of 7.00 m.
    13·1 answer
  • A substance has a mass of 2795 g and a volume of 312 cm
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!