The apparent brightness is defined by how much light we get pretty much. The formula is:
This takes into account that the light is spreading out to a sphere that has the surface given by 4πd^2.
We have that d=20 ly and 1 ly is 9.46*10^12 km or 9.46*10^15m.
Hence, d=20*9.46*10^15=189.2 *10^15 m
Now, we can substitute the d value and calculate that L=<span>8.45184*
W/m^2</span>
<u>Answer:</u> transitional
<em>Gerobatrachus hottoni mostly like to be transitional fossil.</em>
<u>Explanation:</u>
<em>Gerobatrachus refers to an extinct genus of amphibamid temnospondyl, which thrived in the initial Permian, that is, about 290 Mya</em>, in the region, which is now known as Baylor County, Texas.
The transitional form of fossils is those that <em>demonstrate the intermediate form between the two distinct living species, </em>it could be in a form of an ancestor and its descendants.
It has been believed that the reptiles creatures as frog have evolved from the <em>previous ancestor of primitive amphibian tetrapod subclass known as Temnospondyl. </em>
Answer:
Maps on a phone
Explanation:
We use the map on our phone to get places that where unfamiliar with. Without it it would be a lot harder to get places and a lot more calculations, but with our phones we can get that information in a second. People use it almost everyday since we need to go places for work, or just daily things that we need to do. We can also use it for when were in a recognizable area we can look to see where we are and the best way to get back.
Answer:
From lowest to highest grade,
Slate > Phyllite >Schist
Explanation:
The grade of metamorphism is usually studied in the metamorphic type of rocks where the rocks are formed due to the high pressure and temperature condition. These rocks are formed in a sequence from a lower grade to a higher grade. Here the low-grade rocks gradually change to more hard and resistant rock when subjected to extreme pressure-temperature conditions.
In the above, there are 3 metamorphic rock names gives, which can be arranged from a lower grade to higher grade. Slate is a low-grade metamorphic rock that changes into Phyllite, another medium-grained metamorphic rock. This Phyllite again alters to Schist under extreme pressure-temperature conditions.
