You have to buy all the ship upgrades and do all the squad members' loyalty missions so that your whole crew is loyal.
You also need to choose the right specialist for each assignment. Legion can hack just about anything, Garrus knows how to lead a squad, Jack is pissed off enough at the Collectors to hold up a biotic shield and knock 'em a ways off, if she gets irritated enough.
No. Mass is directly propotional to weight.
Yes.
Sorry, you can't.
No problem. Without mass, gravity has no effect anyway.
Zaeed Massani is a mercenary that you can get in your squad via download from The Cerberus Network (requires XBOX Live)
Not while remaining on the surface of this planet. If you go into space, your mass will not change - but your weight will become zero.
To get Grunt on your team in Mass Effect 3, you must first ensure that you saved him during the events of Mass Effect 2. If he survived, he will automatically join your squad in Mass Effect 3 as part of the Krogan forces. Additionally, completing the "Priority: Tuchanka" mission allows you to interact with him and solidify his presence in your team. Make sure to complete any side quests related to the Krogan to strengthen your alliance with him.
You can't change your character class after you have created and locked in your character for the game without starting a new one and losing all of your current progress.
The mass of a solid is the amount of matter that it has that determines its heaviness without the effect of gravity. Its standard unit of measurement is kilogram.
No, you have to complete the whole main story mode and depending on what level your at you'll start off with some xp in mass effec 2
If he died in Mass Effect 1 then he is not in Mass Effect 2. If he survived Mass Effect 1 he shows up in Mass Effect 2 but he can not be killed.
From experience, topping up the squad slots by way of cheating causes some glitching in party abilities before they are earned properly. However, if you want to try it for yourself, Google the haxor trainer for ME2 (though only Shepard points can be frozen).