Which of these describes Kepler’s third law of orbital motion?(1 point)
Responses
T2 ∝ a3
T2 ∝ a3
T3 ∝a2
T3 ∝a2
T∝a2
T∝a2
T2∝a
T2∝a
T2 ∝ a3
Which planet’s orbit was Kepler first studying when he began to develop his laws of orbital motion?(1 point)
Responses
Earth
Earth
Mars
Mars
Jupiter
Jupiter
Saturn
Mars
Which statement describes Kepler’s third law of orbital motion?(1 point)
Responses
The cube of orbital period is proportional to the square of the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.
The square of orbital period is proportional to the semi-major axis.
The square of orbital period is proportional to the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.
Which is the best description of Earth’s orbit?(1 point)
Responses
circular
circular
highly elliptical
highly elliptical
almost circular
almost circular
parabolic
parabolic
almost circular
Which orbital shape did most scientists in the early 1600s think the planets of our solar system have?(1 point)
Responses
hyperbolic
hyperbolic
elliptical
elliptical
circular
circular
parabolic
circular
The correct description for Kepler's third law of orbital motion is "T2 ∝ a3".
To understand how to get this answer, let's break it down:
Kepler's third law states that the square of the time period of revolution of a planet around the Sun is directly proportional to the cube of its average distance from the Sun.
In mathematical terms, this can be represented as T2 ∝ a3, where T is the time period of revolution and a is the average distance from the Sun. The symbol "∝" indicates proportionality.
To determine the correct option, we need to look for the response that matches this equation. In this case, the correct option is "T2 ∝ a3".