For a moon orbiting its planet, rp
is the shortest distance between the moon and its planet and ra
is the longest distance between the moon and its planet. What is a moon's orbital eccentricity if rp
is equal to 0.27ra
?(1 point)
Responses
0.57
0.57
0.27
0.27
0.65
0.65
0.48
0.65
What shape is the Earth's orbit around the Sun?(1 point)
Responses
an ellipse that is almost circular
an ellipse that is almost circular
a circle
a circle
an ellipse that is elongated
an ellipse that is elongated
a spiral
an ellipse that is almost circular
A satellite orbiting Earth at an orbital radius r has a velocity v. Which represents the velocity if the satellite is moved to an orbital radius of 5r?(1 point)
Responses
15√v
the fraction with numerator 1 and denominator square root of 5 v
15v
1 fifth v
5–√v
square root of 5 v
5v
5 v
the fraction with numerator 1 and denominator square root of 5 v
Which of the following statements about Newton's theory of universal gravitation are true? Select the three correct answers.(2 points)
Responses
Gravitational force increases as the mass of objects increases.
Gravitational force increases as the mass of objects increases.
Gravitational force increases as mass of objects decreases.
Gravitational force increases as mass of objects decreases.
Gravitational force increases as the distance between objects increases.
Gravitational force increases as the distance between objects increases.
Gravitational force increases as the distance between objects decreases.
Gravitational force increases as the distance between objects decreases.
The theory applies only to objects on Earth.
The theory applies only to objects on Earth.
The theory applies to all objects in the universe.
Gravitational force increases as the mass of objects increases.
Gravitational force increases as the distance between objects increases.
The theory applies to all objects in the universe.