A cylindrical habitat in space was proposed by G. K. O'Neill in 1974. If the habitat was 8.3 km in diameter and 28 km length would be able to have land, lakes, and multiple cities on the inside surface and clouds along its center. They would all be held in place by the rotation of the cylinder about its long axis.

How fast would the cylinder have to rotate (linear speed at the surface) to imitate the Earth's gravitational field at the walls of the cylinder?

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.