<u>Answer: </u>
For 1: The correct option is b.
For 2: The correct option is a.
<u>Explanation: </u>
Earth is the third planet in our solar system. It's placement in the solar system is such that, it is the only planet on which life survival is possible.
Earth lies in the Goldilock zone that defined as the zone in which there is an accurate temperature and atmospheric conditions which supports the life.
So, this placement most affects earth's unique temperature and atmospheric conditions. Hence, the correct answer is Option b for 1 and Option a for 2.
Answer:
Explanation:
Given that
Diameter of laser beam d= 2.4 mm
Radius of laser beam r= 1.2 mm
Power P =1.7 W
We know that intensity(I) of laser beam given as follows
Now by putting the values
So
So the intensity at 1.76 m away from laser
Answer:It can run in the same direction but it increases its speed.
Explanation:
Answer:
1.45
Explanation:
Refractive index of the liquid is given as;
Refractive index =
But,
speed =
Since a certain light of specific wavelength was used during the same time, let the time be represented by t.
So that;
speed of light in vacuum =
speed of light in the liquid =
Refractive index = ÷
= x
Refractive index =
= 1.4536
= 1.45
The refractive index of the liquid is 1.45.
Answer:
See the explanation below.
Explanation:
A species is invasive can be spread, naturally either by the behavior of the species, or introduced accidentally or voluntarily by man.
The invasive species increases its density in the occupied area or colonizes new territories over time.
That an invasive species is harmful means that it produces significant changes in the composition, structure or processes of natural or semi-natural ecosystems, endangering native biological diversity.
Uncontrolled reproduction of this invasive species also increases the risk of control and extermination of the species, due to the acclimatization of the new species in the environment as well as possible exponential reproduction.