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
Savatey [412]
3 years ago
10

What event occurred when the decay of strontium-90 in an igneous rock first started?

Biology
1 answer:
neonofarm [45]3 years ago
8 0
If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred at 0 years on the horizontal axis? 
<span>I have a graph with the vertical axis showing the percentage of radioactive element remaining. </span>
You might be interested in
Propane is burned to provide the heat in many cooking grills. The chemical
tangare [24]

Answer: it's 3CO2+4H2O+Energy

Propane is a linear alkane of formula C3H8. It is mainly used as fuel (this is the main component of liquefied petroleum gas) in cooking and chemical industry reactions.

The reaction of its complete combustion by the presence of oxygen is:

C3H8 (gas) + 5O2  ==> 3 CO2 + 4H2O + energy (2220⋅kJ)

As we can see, propane can release carbon dioxide and water as every combustion reaction, and a lot of energy in the form of heat.

6 0
2 years ago
What are monosaccharides made up of?
77julia77 [94]
<h2>Answer</h2>

The monosaccharides is formed by just bounding of C, H and O.

<h2>Explanation</h2>

Monosaccharides are simplest molecule or unit in the carbohydrates group which united with each other to form di, tri or polysaccharide structure. As these are the simplest unit in carbohydrates, they are only formed by numbers of carbon, oxygen and hydrogen atoms. The number of atoms in the chain of monosaccharides varies with changing required compound. for example in deoxyribose, one of hydrogen is not present in its structure but present in ribose.

3 0
3 years ago
which enzyme is responsible for “unzipping" the DNA by breaking the hydrogen bonds between the nucleotides?
leonid [27]
The answer is: helicase
3 0
3 years ago
Suppose orange beetles and green beetles live in the same environment. Green beetles are harder to see on leaves, so birds eat p
Neko [114]
...decrease in population until the fall season, where leaves are orange to suit the orange beetles
6 0
3 years ago
Whet era does the rock of the Canadian Shield date back to
hram777 [196]
it dates back to the Precambrian era
8 0
3 years ago
Other questions:
  • *PLEASE HELP*
    15·1 answer
  • Plants in the desert
    11·2 answers
  • When an animal dies, what happens to the energy stored in the animal?
    6·1 answer
  • I need help!!! Please!!!!!
    10·1 answer
  • Duncan was a subject in a clinical study that was designed to determine the effects of certain diets on health. While participat
    5·1 answer
  • Which terrestrial biome has the most biodiversity?
    9·1 answer
  • Genetic Variation:Question 8
    14·1 answer
  • One difference between the digestive system and the excretory system
    8·1 answer
  • What Are the process of photosynthesis and cellular respiration produces?
    10·1 answer
  • Why is ETC considered an aerobic process?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!