Search over 10,000 free study notes

a type of wander waals force called hydrogen bonding due to the slightly positive hydrogens and slightly negative oxygen. this occurs because of the uneven attraction for electrons between the oxygen and hyd...

Crude oil is a mixture of different hydrocarbons, which all have different lengths and must be separated by length into different useful 'fractions'. Fractional distillation achieves this by using the fact t...

In portuguese nouns have gender- masculine or feminine. Most masculine verbs end with -o, -im, -om, and -um. Most feminine nouns end with -a, -ção, -dade or -gem. Examples: Masculine o carro = a car o fim = ...

Both Imperfecto and Indefinitivo are past tenses. Imperfecto is a tense used to describe states, emotions, circumstances, settings - it implies that the action has not been finite in the past. For example: I...

Synapses are chemical connections between neurons which do indeed slow down transmission. However, they provide the nervous system with many benefits that could not be achieved without them: They ensure that...