Answer:
At different times
Explanation:
The echo returns at different times, but faster in water. This is because water particles are bound closer and this makes them transmit vibration energy from one particle to the next quickly. An echo is a sound wave and sound waves are longitudinal waves that occur by the collision of particles to move the vibrations along, and this is why they move slower in air.
Hello
It's a and d
Have a nice day
Here's the answers in order:
-
people's rights
- natural law
- social contract
So the full paragraph would read: Many philosophers wrote down their philosophies about the government and <u>people's rights</u>. A number of philosophers published books on the subject. They applied the idea of <u>natural law</u> to social and political analysis. Thomas Hobbes wrote Leviathan, a book about social structure and government. He wrote about the <u>social contract</u>, an agreement in which the people exchanged some of their individual freedoms for the government’s protection.
