If 25% of a radioactive element remains after 1,000 years, what is the half-life?

In apex! a liquid heated beyond a certain temperature becomes

How does a large body of water, such as the ocean, influence climate?

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.