Answer:
Explanation:
formula for the period of a satellite = 2π.
period of satellite A (Ta) = 2π.
period of satellite B (Tb) = 2π.
ratio of the periods of the satellites = (take note that π is shown as )
where
- Me = mass of the earth
- G = universal gravitational constant
- π = 3.142
- all the above are constants and cancel each since they are both at the numerator and denominator
- R = distance from the earth
the equation now becomes
=
- the velocity of a satellite = (take note that π is shown as )
- rearranging the above R = (take note that π is shown as )
- now substituting the above into the equation we have
= (take note that π is shown as )
2π will cancel itself from the numerator and denominator and we have
=
squaring both sides we have
=
now cross multiplying we have
from the question the velocity of satellite A is 3 times that of satellite B hence Va = 3Vb
Answer:
D
Explanation:
the total speed and the total mass of the entire system remain the same weather one object is moving or stationary.
When two or more objects collide, the collision does not change the
total momentum of the two objects.
Whatever momentum is lost by one object in the collision is gained
by the other. The total momentum of the system is conserved.
Answer:
at the Equator
Explanation:
The four seasons are determined by four main positions in the Earth's orbit in its turn around the Sun (ecliptic plane), which are called solstices and equinoxes: winter solstice (Capricorn point, December 22), spring equinox (Aries point, around March 21-22), summer solstice (Cancer point, June 21) and autumn equinox (Libra point, around September 22-23).
In the equinoxes, the axis of rotation of the Earth is perpendicular to the sun's rays, which fall vertically over the equator. In solstices, the axis is inclined 23.5º, so that the sun's rays fall vertically on the Tropic of Cancer (summer in the northern hemisphere) or Capricorn (summer in the southern hemisphere).
When falling vertically on Ecuador, it generates a greater impact on the surface of the Tierre reaching a greater amount of energy and therefore UV rays.