The question pertains to the acoustic properties of curtains in theaters and their ability to absorb sound waves rather than reflecting them, which is what causes echoes.
This is analogous to how sound waves behave when they encounter different materials. A hard surface reflects sound waves effectively, leading to echoes, while a soft surface (like curtains) absorbs sound waves, reducing reflection and preventing echoes.
Magnetic repulsion is the repulsive force between the magnets that causes the falling magnets to be pushed back up.
The diagram shows the trajectory of Voyager 2 as it traveled through the solar system, passing by several outer planets: Jupiter, Saturn, Uranus, and Neptune.
The mission was designed to gather data about these planets, their atmospheres, rings, and moons.
In the diagram, the moons of Jupiter are represented in concentric circles around the planet. The closest moon to Jupiter is the one that is positioned nearest to the center (where Jupiter is located).
Callisto is the furthest out among the listed moons. Ganymede is farther from Jupiter than Europa and Io. Europa is closer than Ganymede and Callisto but is still not the closest. Io is the innermost moon shown in the diagram, making it the closest to Jupiter.
In the diagram, the globe is floating above a special base, likely using magnetic forces to suspend it.
The gravitational force pulls the globe down towards the Earth. The magnetic force at the base likely generates a magnetic field that counteracts the gravitational force, allowing the globe to float.
The globe remains in a stable position because the upward magnetic force balances the downward gravitational force.
