Read the excerpt from team moon. so they came by the thousands—kids, really, twenty-somethings, a few in their thirties. no one knew for sure how to get to the moon, how to land, or get home. but their goal was clear-cut, and that was enough. that gave them purpose: a reason to puzzle out the problems and seek solutions rather than sleep. which sentence from the excerpt best identifies the problem? so they came by the thousands—kids, really, twenty-somethings, a few in their thirties. but their goal was clear-cut, and that was enough. no one knew for sure how to get to the moon, how to land, or get home. that gave them purpose: a reason to puzzle out the problems and seek solutions rather than sleep.

according to archimedes principle, volume of water displaced = volume of water.

hence volume of rock is = 1.65l or 1650 cm^3

explanation:

op: object of preposition

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

lol

today at the bank, an old lady asked me to check her balance. so i pushed her over.