Answer:
The correct answer out of the four given options is
option a. light elements with atomic numbers less than 5
Explanation:
Big Bang nucleosynthesis, abbreviated as BBN, also known as primordial nucleosynthesis took place after the Big Bang for about 10 s to 20 minutes and resulted in the yield of isotopes of helium-4 (
), helium-3 (
) which accounts for most of the world's helium, other isotopes of hydrogen in small amounts like deuterium (D or
) and lithium isotope, lithium-7(
) in small amount.
Apart from these stable nuclei, it also yielded two radio-active isotopes: tritium(
) and beryllium-7(
) which due to their unstability later decayed into () and ().
All of these isotopes are of light elements with atomic number less than 5.
Answer:
It's obvious.
option b. and d.
gapuz and lapuz grapes farm
Answer:
Option (3)
Explanation:
In a topographic map, the elevations are represented in the form of contour lines. This is the line of equal elevations. The more contrasting and highlighting contours are considered as index contours.
In the given map, the dark brown colored contours are the index contours, of which Y is the one. The elevation of this contour line is 3250.
The Z contour is at the left bottom portion of the topographic map and shows a lesser contour line of 2900. This can be identified by observing the river flowing downward. The rivers are usually denoted by the blue color line that flows through the V-shaped sequential arrangement of contours. This is one of the ways of determining the increasing and the decreasing direction of contour lines.
Thus, the elevation of Y and Z is 3250 and 2900 respectively.
Hence, the correct answer is option (3).
The ring of fire does not create Hurricanes.
Explanation
All other choices have relation to the tectonic plates and the earths crust and mantel. Hurricanes are created by air temperatures and pressure, not earths inner workings.
The fault is towards the bottom of the diagram, so thats means that is would b e fairly new because the fragments/ particles that settle on the top are old and worn down. The fragments at the top are eventually at the top because of wind erosion in the layers. IM SO SORRY if this does not help you this was really the only way i could explain. I HOPE THIS HELPS YOU OUT
