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
padilas [110]
2 years ago
6

The half-life of tritium or hydrogen-3 is it 12.32 years, after about 24.6 years how much of a sample of tritium remain unchange

d?
A 1/3
B 1/2
C 1/8
D 1/4
Biology
1 answer:
Fittoniya [83]2 years ago
6 0

The answer will be D, 1/4.

How you come to this conclusion( for future reference to anyone stuck on this ), is figure out how many half-lives have passed. In this case two half-lives have passed ( 24.6 is 12.32 + 12.32 ), so just put into your calculator 1/2 x 1/2 ( or .5 x .5 ). Make sure your answer is in fraction form, and you have your answer! Hope this helps any who may see this!

You might be interested in
9. Because the sun heats sections of the Earth more or less, and hot
Nadya [2.5K]

Answer:

This shows the interaction between the earth and sun.

Explanation:

  • There is a variation in the amount of heat that reaches the different latitudes as the interaction between the sun and earth which firms different angles of incidence on the surface.  
  • The rays of the sun are more concentrated in mid latitudes that is the tropics and are slanting towards the poles this due the tilt in axis of earth.  
  • This variation lads the warm air to rise and reach the poles and similar the cold polar air reaches the tropics and develops a cycle of convective cells.  This leads to a latitudinal balance in temperatures.
3 0
2 years ago
An amino group has what type of properties?
weqwewe [10]
Hydrophobic<span> is da answer.</span>
3 0
2 years ago
5. Why do scientists publish the results of their work?
Bogdan [553]

Answer:

To verify their results

Explanation:

if they didn't then people wouldn't believe them and they would have no reason to

4 0
2 years ago
Read 2 more answers
The round pea seed trait is dominant over the wrinkled pea seed trait. If the phenotype of a pea seed is wrinkled, which combina
vovikov84 [41]

The wrinkled pea will have two recessive alleles on the locus.

Explanation:

Two forms of same gene are called alleles of that gene.

The allele that expresses itself under heterozygous condition is called the Dominant allele.

The recessive allele can express itself only if they are under homozygous combination i.e. both the alleles on homologous chromosome are recessive.

Here wrinkled pea is a recessive trait and if it is expressed in the phenotype then the genotype of the plant must be homozygous for the recessive allele.

6 0
3 years ago
Read 2 more answers
The movement of H+ through the ATP synthase is best described as an example of __________. The movement of H+ through the ATP sy
CaHeK987 [17]

Answer:

Facilitated diffusion

Explanation:

Oxidative phosphorylation, involving the Electron transport chain and Chemiosmosis is the third stage of cellular respiration. The main purpose of the ETC is to build an electrochemical (electrical and concentration) gradient across the inner mitochondrial membrane. It does this by using energy to pump protons (H+ ions) from the matrix to the inter-membrane space of the mitochondria.

Facilitated diffusion, also known as passive transport through channels, is a form of facilitated transport involving a passive movement of molecules along their concentration gradient, through channels called membrane proteins.

During Chemiosmosis of Oxidative phosphorylation, protons (H+) flow back down their concentration gradient (from inter-membrane space to matrix) due to the chemiosmotic gradient that has been formed in ETC. However, hydrogen ions (H+) cannot pass through the inner mitochondrial membrane except through an enzyme (protein) found in the inner mitochondrial membrane called ATP synthase. This protein acts as a machine powered by the force of the H+ diffusing through it, down an electrochemical gradient. This movement of H+ via ATP synthase further catalyzes the conversion of ADP to ATP.

It is an example of facilitated diffusion because H+ ions are diffusing across the inner mitochondrial membrane (from inter-membrane space to matrix) via a protein channel or membrane protein called ATP synthase.

4 0
3 years ago
Other questions:
  • A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and
    13·1 answer
  • Which of these must occur during S phase of the cell cycle so that two daughter cells can be produced during M phase?
    15·1 answer
  • Scientists have observed that pythons have vestigial leg bones they have also observed that snakes in general have more DNA sequ
    5·1 answer
  • The residual volume is approximately ________l in an adult human.
    9·1 answer
  • Which of these is a characteristic of climate?
    11·2 answers
  • Bats sleep in these caves, but they usually feed outside the caves at night. However, the bat population does provide the cave f
    8·1 answer
  • During the course of an action potential, the membrane potential rapidly rises and reaches a peak of about +40 mV before falling
    5·1 answer
  • In a case-control study, a researcher found no association between exposure to A and disease B. Later she found out that there w
    5·1 answer
  • PLEASE ANSWER NO LINK ILL GIVE BRAINLIEST PLEASE THIS IS DUE VERY SOON
    14·1 answer
  • Is the height of a balls bounce affected by the height from which the ball is dropped?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!