Answer:
They are the most visible evidence of global warming today. In addition to raising sea water levels, widespread loss of glaciers will likely alter climate patterns in other, complex ways. For example, glaciers' white surfaces reflect the sun's rays, helping to keep our current climate mild.
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The free body diagram consists of:
1) Weight force, which is a vertical arrow downward
2) A Normal force that is perpendicular to the ramp.
The Normal force can be decomposed in a vertical component and an horizontal component.
The vertical component, Ny, must equal the weight force, due to equilibrium (rest) condiition =>
Ny = weight = m*g = 5.5kg*9.8m/s^2 = 53.9 N
By geometry the vertical component of the Normal force, Ny is such that
cos (angle) = N / Ny => N = Ny * cos(angle)
=> N = 53.9N * cos(angle)
Now use that equation for each option:
a) 0 ° => N = 53.9N * cos(0) = 53.9N
b) 12° => N = 53.9 * cos(12) = 52.7N
c) 25° => N = 53.9 * cos(25) = 48.9N
d) 45° => N = 53.9 * cos(45) = 38.1N
In regions where the sun's rays hit at an angle, solar energy is less than the region which is exposed to direct sun rays and the climate is cold.
- here the slanting sun rays fall on the frigid zone.
- the frigid zone receives slanting ray due to The higher the latitude, the less is the angle that the sun's rays make with the surface of the earth. Hence , the polar regions ( frigid zone ) receive slanting rays of the Sun.
- on the other hand The Tropical zone gets vertical rays of the sun, while temperate and polar zones receive slanting rays of the sun.
- North and South poles get more slanted sun rays. The axis of the earth is not straight, it is tilted in the angle of approximately 23.5°.
- The more slanted the sun's rays are, the longer they travel through the atmosphere, becoming more scattered and diffuse and due to low heating the region becomes cold .
to know more about frigid zone click here
brainly.com/question/19538832
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Simple, we weren't around during that time, so we made theories and conclusions to when life evolved on earth.
