This can be answered using trigonometric analysis. This sloped path that is 150 m long is the hypotenuse of the triangle. The adjacent angle would then be 65 degrees. Given these:
sin 65 = h / 150
Where: h = vertical displacement = 150 (sin 65)
h = 135.95 meters
Answer:
Part a)
Part b)
Part c)
Explanation:
Velocity just before it strike the ground is given as
since there is no friction in horizontal direction so its speed in horizontal direction will remain same
Part a)
velocity in X direction
time taken by the skier to reach the ground is given as
now in the same time it will cover vertical distance
so magnitude of initial speed is given as
Part b)
Direction of velocity
Part c)
Now in order to find the height of the ramp we can find the vertical displacement
C) Infrared.
<h3>Explanation</h3>
The wavelength of the "primary" (a.k.a. "peak") outgoing radiation from the earth depends on the surface temperature of the earth.
,
where
- is the peak wavelength (in meters) of the outgoing radiation, and
- is the absolute temperature of the earth (the one in degrees Kelvins.)
The average temperature on the earth is around 15 °C (around 60 °F.)
Convert to degrees Kelvins:
.
Peak wavelength:
.
What kind of electromagnetic radiation is that? Refer to a chart of the EM spectrum.
Radiations:
- : ultra-violet (UV) or radiations that are more energetic than UV;
- : visible light;
- : infrared (IR) and less energetic radiations.
is longer than the wavelength of visible light. The radiation is infrared (IR.)
Aceleration refers to motion but gravity refers to force
Acceleration is change of velocity with time while gravity is the force of attraction pulling objects. When this force pulls an object it tends to move with a certain type of acceleration called acceleration due to gravity. This is equal to 9.8 m / s^2 for earth