Answer:
Option (C)
Explanation:
In order to set up urbanization in a selected area, initially, a large number of trees are being cut down. This process is commonly known as deforestation.
The deforestation process has various impacts on the environment and the climatic condition at various places. Extensive cutting down of trees leads to the occurrence of rapid soil erosion, where the materials from the topsoil are entirely carried away by wind and water. Due to this, there occurs a high absorption of incoming solar energy that increases the temperature of that area.
In addition to this, trees are the main source from which the oxygen is provided. The absence of trees also leads to an increase in the amount of carbon dioxide because the carbon dioxide will not be absorbed by the trees and in return, it won't be able to provide us oxygen. Due to this, the amount of carbon dioxide also increases.
Thus, the above changes are caused due to the deforestation of woodlands.
Hence, the correct answer is option (C).
Explanation:
deforestation of woodland
(b) What is the value of g at the location of this satellite?
(a) above Earth's surface
The orbital speed of a satellite orbiting the Earth can be found using the equation
where
G is the gravitational constant
is the Earth's mass
r is the radius of the satellite's orbit
The orbital speed can also be rewritten as the ratio between the circumference of the orbit and the orbital period, T:
where
T = 129 min = 7740 s is the period
Combining the two equations,
And solving for r,
This is, however, the orbital radius: this means we have to subtract the Earth's radius to find the altitude of the satellite, which is
therefore, the altitude of the satellite is
b)
The value of g at the location of the satellite is given by
where:
G is the gravitational constant
is the Earth's mass
is the radius of the satellite's orbit
Substituting into the equation, we find
The satellite orbits at an altitude of approximately 800 km. The gravitational constant, 'g', at this location is approximately 8.66 m/s^2.
The orbital period of an artificial satellite can be used to calculate the altitude at which it orbits. For a satellite that completes each orbit in 129 min (or approximately 2.15 hr), we can apply Kepler's third law which states that the square of the period of a satellite is proportional to the cube of its semi-major axis (distance from the center of the Earth to the satellite).
The formula for the altitude is given by: h = [(GMT^2)/(4π^2)]^(1/3) - R, where G is the gravitational constant, M the mass of Earth, T the orbital period, and R the Earth's radius. With the values G=6.67 x 10^-11 N(m/kg)^2, M=5.98 x 10^24 kg, T=2.15 hr = 7740s, and R=6.371 x 10^6 m, we get h approximately equals 800 km.
The value of 'g' at the satellite's location is given by g = GM/(R+h)^2. Substituting the aforementioned values, we get g to be approximately 8.66 m/s^2. This is less than the 9.81 m/s^2 at Earth's surface due to the increased distance from the Earth's center.
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force of gravitation between two different masses is given by
here in first case we will have
Newton
another case we have
Newton
another case we have
Newton
so the force will be maximum in last case when two 2 kg mass is placed at 1 m distance and minimum force is in second case when 1kg and 2kg mass is placed at 2 m distance
The force that pushes electrons along in a circuit is called the electric field.
The force that pushes electrons along in a circuit is called the electric field. The electric field in a wire points from the higher potential end to the lower potential end and provides the force necessary to keep the electrons moving. The electrons, carrying a negative charge, move on average in the opposite direction of the electric field.
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