Answer:
Standing wave
Explanation:
A standing wave is a wave that does not propagate - instead, the oscillations due to the wave occur always in the same place. A standing wave is produced, for instance, when a string (tied on both ends) is made oscillating, or when two identical waves travel in opposite directions.
A standing wave is characterized by two particular types of points:
- There are some points where the amplitude of the oscillation of the wave is always maximum - these points are called anti-nodes of the wave
- There are some points where the amplitude of the oscillation of the wave is always zero - these points are called nodes of the wave.
Most geologists accept radiometric dating techniques as valid because radioactive elements decay at a constant and measurable rate.
Answer: Option C
<u>Explanation:</u>
Scientists prefer radioactive dating to carbon dating because it is more accurate in measuring. The analysis depends upon the radioactive decay of radioactive isotopes of any matter in a given rock or soil.
The parent atoms and daughter atoms are compared while studying, and hence age can be calculated easily. Radioactive decay depends upon the given half-life of the atom, which is a constant and is known. So, it would be very easy to calculate the number of progeny atoms and parent atoms and find out their age.
Answer:
Explanation:
We define our values, we know that,
our total mass is given by,
making summatory in y, we have that
Re-arrange for a,
Answer: It is the ratio of solute in a solution to either solvent or total solution.
Explanation: