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
boyakko [2]
3 years ago
11

Compare and contrast between scientific theory,scientific law and scientific hypothesis

Biology
1 answer:
dedylja [7]3 years ago
6 0
<span>A scientific theory is NOT a wild guess. It must be consistent with known experimental results and it must have predictive power. As new knowledge is gained, theories are refined to better explain the data. A law is a mathematical relationship that is consistently found to be true.</span>

You might be interested in
Iron-55 has a half-life of 3 years. How much of a 40 gram sample will remain after 12 years? A. 0 grams B. 4 grams C. 2.5 grams
Readme [11.4K]

Answer:

\boxed {\boxed {\sf C. \ 2.5 \ grams }}

Explanation:

We are asked to find how much of a 40 gram sample remains after 12 years.

Iron-55 has a half-life of 3 years. Therefore, after 12 years, 4 half-lives have been completed.

  • 12 years/3 years = 4 half-lives

Every time a half-life is completed, half of the sample's mass decays. Remember we start with a 40 gram sample.

  • 1 half- life: 40 g / 2 = 20 g
  • 2 half-lives: 20 g / 2= 10 g
  • 3 half-lives: 10 g / 2 = 5 g
  • 4 half-lives: 5 g / 2 = 2.5 g

There is also a formula that can be used to solve this problem.

A= A_o(\frac {1}{2})^{\frac{t}{hl}

Where A₀ is the initial amount, t is the time, and hl is the half-life.

We know 40 grams is the inital amount, 12 years is the time, and 3 years is the halflife.

  • A₀= 40 g
  • t= 12
  • hl= 3

A= 40 \ g (\frac{1}{2})^\frac{12}{3}

A= 40 \ g (\frac{1}{2})^4

A= 40 \ g * 0.0625

\bold {A= 2.5 \ g}

After 12 years, <u>2.5 grams </u> of Iron-55 will remain.

4 0
2 years ago
Which statement is true?
grigory [225]

Answer:

A:true animals only perform cellular respiration and plants only perform cellular respiration

6 0
1 year ago
Read 2 more answers
Enter the correct term in the blanks.
Amiraneli [1.4K]

Answer:

a. veins and arteries

b.diaphragm

c.kidney

d.lung

e.4

f.left auricle(atrium) , right auricle(atrium)

g.left ventricle, right ventricle

h.blood plasma

i.digestive

j.buccal cavity ,saliva

k.bile

l.excretory

m.kidneys

Explanation:

3 0
2 years ago
How does the polio vaccine work
DerKrebs [107]

Polio affects the central nervous system and spinal cord. It can cause muscle weakness and paralysis. Polio is a life threatening condition because it can paralyze the muscles that help you breathe.

The polio vaccine is used to help prevent these diseases in children and adults.

5 0
3 years ago
Help Help !!
Naily [24]
Carbon debt, caused by CO2<span>  i know that is one of them </span>
3 0
3 years ago
Other questions:
  • The _____ variable, or factor, is what is being deliberately changed in the experimental group.
    10·1 answer
  • You should never depend on your mirrors when you prepare to change lanes. why?
    12·2 answers
  • A patient with a mass in the inguinal region would be located​ ________.
    9·1 answer
  • Which process makes it possible for all the major organs of the body to be formed by week 10 of human
    13·2 answers
  • Producers found in the polar ice region
    8·1 answer
  • What is the main organic material found in the cell?<br><br>​
    7·1 answer
  • WILL GIVE BRAINIEST IF THEY GIVE A CORRECT ANSWER!!! 50 POINTS!!!!<br> what eats sunbeam snakes?
    9·2 answers
  • How is the function of NAD<br> similar to that of NADP+?
    6·2 answers
  • What does a tortoise covering body do for it?​
    8·1 answer
  • Christy is studying sodium in the following periodic table of elements. She makes the following
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!