Answer:
Option (D)
Explanation:
Refraction is defined as the phenomenon where the light changes its course of path while travelling from one type of medium to another. This also affects the speed of the light. This process results in the formation of images by the human eyes and lenses.
This process appears to be bending of light. When a light passes from a lighter to a denser medium, it gets bend towards the normal. And when the light passes from a denser to a lighter medium then it gets bend away from the normal.
Thus, the correct answer is option (D).
the <u>average powe</u><u>r</u> output of the sun is <u>3.8 × </u>
<u> W</u> given that about 1350 w/m2 reaches the upper atmosphere of the earth.
As we know intensity falling over a surface is equal to Energy falling per unit area per unit volume.
I = 
Since Power is equal to energy/time
I = power/area
or
Power = Intensity × area
Now, Distance from Sun to Earth , r = 149.6 ×
m
So, Surface area of the sphere of radius is:
A = 4 π 
= 4 × 3.14 × (149.6 ×
)²
= 2.81 ×
m²
Thus Average Power output of the sun will be:
P = 1350 × 2.81 × 
= 3.7935 × 
P = 3.8 ×
W
So the average power output of the sun is 3.8 ×
W.
If you need to learn more about about the average power of a resistor, click here.
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Answer:
Seismic waves cause Earthquakes by shaking the ground aggressively and dangerously. These waves are usually calculated on a seismograph to calculate how hard the earthquake hit that area. A transform Boundary creates the tension when the tectonic plates gets stuck. It stays stuck for a long period of time. Then, at one point, the tectonic plates become unstuck which releases the tension into waves which are called seismic waves. Hope I answered you question.
Answer:
C. Struggle for existence
Explanation:
Have a great day
Answer:
Time period of the osculation will be 2.1371 sec
Explanation:
We have given mass m = (B+25)
And the spring is stretched by (8.5 A )
Here A = 13 and B = 427
So mass m = 427+25 = 452 gram = 0.452 kg
Spring stretched x= 8.5×13 = 110.5 cm
As there is additional streching of spring by 3 cm
So new x = 110.5+3 = 113.5 = 1.135 m
Now we know that force is given by F = mg
And we also know that F = Kx
So 

Now we know that 
So 

