1. Boiling water
2. Hair straightener or curler
Answer:
When a sound wave moves from water to air, the speed of the sound wave decreases.
Explanation:
This is because the transfer of motion that produces the wave.
Send a pic or something so more people understand
Answer:
The most common of these is carbon 12, 13, 14. All of these isotopes have the same atomic number but different mass numbers. Carbon has the atomic number of 6 which means that all isotopes have the same proton number. However, the number of neutrons is different, thus giving different mass numbers.