The mosquito.
Yes and no, depending on the parasite, if the parasite have evolved a mechanism to not be killed by stomach acid, it passes safely through the stomach, that's why we get tapeworms, its eggs are, strictly speaking, immune to acid. Though don't worry, stomach acid kills most of the things going through.
The whistle frightens them and excites them, causing then to yelp.
Schistosomiasis, or bilharzia, is usually not spread directly from one person to another. It usually spreads by exposure to water in which the snails that serve as the host for the parasite are found. An infected person passes the parasites on to the snails, where the parasite continues its life cycle, and is released into the water to infect another person.
The maximum acceleration of a point on the string occurs when the wave passes through, causing the point to move at its fastest speed.
No, a fanworm is not a parasite. It is a type of marine worm that is filter feeders, meaning they feed by catching particulate matter that passes by in water currents using their feathery tentacles. They are not harmful to their environment.
That would be a solar eclipse.
When a ray of light passes through a prism, it undergoes refraction, causing it to bend and split into its component colors due to differences in wavelengths. This phenomenon is known as dispersion.
When electricity passes through neon gas, it excites the neon atoms, causing them to emit photons of light. This produces the characteristic bright glow that neon is known for.
An eclipse occurs.
Air passes over the vocal chords, causing them to vibrate. The vibrations make noises which we interpret as words and sounds.
Light bends when it passes from one medium to another because its speed changes as it moves through different materials, causing it to change direction. This phenomenon is known as refraction.
The phenomenon is called refraction. Refraction occurs when light passes from one medium to another with a different optical density, causing the light to change speed and bend.