1. What happens to particle spacing when temperature increase, What we call this process?

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem