Of course! Type O- is the universal donor and AB+ is the universal recipient.
It depends. If O neg individual is donating, then that's fine. O is the universal donor bloodtype and there are no RH factors associated. However, on the other hand, if A pos is donating, the O neg individual's body will counteract both the A antibodies as well as the RH factor.
Electron flow is considered to be negative to positive whereas conventional current flow is considered to be positive to negative.
Sincerity is almost universally considered a positive trait.
Protons are considered positive.
Work done by the system is considered as PositiveWork done on the system is considered as Negative
An upward direction is usually considered positive.
It is considered neutral as it has no value.
Positive + Negative = Negative Negative + Negative = Positive Positive + Positive = Positive Negative + Positive = Negative
Negative * positive = negative Positive * positive = positive Negative * negative = positive
The "anode" is usually considered to be "negative". However in some experiments such as Gel Electrophoresis the anode is positive.
Steps that are considered positive by one side are likely to be considered negative by the opposite side.
The ELECTRONS flow from the negative to the positive terminal. But it is considered that the electric current flows from the positive to the negative terminal.