8. An electrical insulator might be which of the following?
a. plastic
c. glass
b. rubber
d. any or all of these

d all of the above

Explanation:

Plastic,glass, and rubber are insulators for electricity.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

beta decay is the answer