How did Kepler develop his second law of motion?(1 point) Responses He invented a telescope that was strong enough to view all planets of the solar system along their orbits. He invented a telescope that was strong enough to view all planets of the solar system along their orbits. He used a telescope to carefully follow and time the orbital motion of Mars. He used a telescope to carefully follow and time the orbital motion of Mars. He compared data of planetary motion at different times along orbits. He compared data of planetary motion at different times along orbits. He made accurate measurements of the positions of all the planets over many years.
According to Kepler’s second law of motion, which statement describes the area swept out by a line between a planet and the sun?(1 point) Responses It is constant for equal times. It is constant for equal times. It increases as the planet moves away from the sun. It increases as the planet moves away from the sun. It increases as the planet approaches the sun. It increases as the planet approaches the sun. It is constant if the planet moves at a constant speed.
It is constant for equal times.
hich does Kepler’s second law state about planetary motion?(1 point)
Responses
The planet travels along an elliptical orbit.
The planet travels along an elliptical orbit.
The square of the orbital period is directly proportional to the cube of the semi-major axis.
The square of the orbital period is directly proportional to the cube of the semi-major axis.
A line between the planet and the sun covers equal areas in equal times.
A line between the planet and the sun covers equal areas in equal times.
Planets move at the same speed at all points along their orbit.
A line between the planet and the sun covers equal areas in equal times.
You have now learned the importance and benefits of weight training and cardiovascular activity. Decide which athlete might use the least amount of weight training in his/her preparation.
(1 point)
Responses
Football player
Football player
Wrestler
Wrestler
Baseball player
Baseball player
Cross-country runner
Cross-country runner
What type of weights should you NOT use if your goal is to build muscle mass?
(1 point)
Responses
Free weights
Free weights
Weight machines
Weight machines
High intensity (heavy weights)
High intensity (heavy weights)
Low intensity (lighter weights)
Low intensity (lighter weights)
What should you always do before lifting weights?
(1 point)
Responses
Drink water
Drink water
Stretch properly
Stretch properly
Talk to a friend
Talk to a friend
Eat