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What is the difference between the verbs "ser" and "estar" and when should they be used?

"Ser" and "estar" are the 2 forms of the verb "to be" in Spanish. The first indicates identity and is more permanent, used in sentences like "I am Naomi" (Yo soy Na...

Answered by Naomi R. • Spanish tutor

2029 Views

When do you use 'avoir' or 'être' for the passé composé?

The passé composé is composed of two parts - the auxiliary verb (avoir or être) in the present tense and the past participle of the verb you want to pu...

Answered by Rachel D. • French tutor

15178 Views

Name 3 differences between RNA and DNA (3).

RNA is single stranded however DNA is double stranded. RNA contains the base uracil however DNA contains the base thymine. RNA contains the sugar ribose however DNA contains the sugar deoxyribose. RNA is ...

Answered by Samodani W. • Biology tutor

2726 Views

According to Newton's third law, every action has an equal and opposite reaction. Why then does a box move when I push it? Shouldn't the two opposing forces cancel out to a zero net force?

The key to this question is realising that the action and corresponding reaction refer to forces that act on different objects. When I push the box, I exert a force on the box. As a result of thi...

Answered by Ellen S. • Physics tutor

6216 Views

Define the term osmosis

Osmosis is the movement of water particles from an area of high concentration to an area of low concentration through a partially permeable membrane along a concentration gradient.

Answered by Alice D. • Biology tutor

2856 Views