Two physical cores and two virtual cores.
Dual means two, so two separate cores
If it has rear heat it has two heater cores. One in the front and one in the back.
it only has two cores
Earth
an apple with two cores or 4 cores
Dual core is the property of having two cores in a single CPU. Core2Duo is an Intel CPU that has two cores.
independent cores into a single package composed of a single IC. A dual-core processor contains two cores, and a quad-core processor contains four cores.
The Centrino Duo processor made by the company Intel has two cores. It is implied in the name "Duo" , which can be translated as "two", "double" or "twice".
Four independent cores into a single package composed of a single IC. A dual-core processor contains two cores, and a quad-core processor contains four cores.
Depends which model, and whether you are talking about physcial cores or virtual cores, for example a processor can have two physical cores and two virtual cores and still be branded a "quad core" Apart from the bottom of the range i5 650, the rest are sold as "quad cores" although they don't have four physical cores.
That can either mean a dual-socket machine with dual-core CPUs (two CPUs with two cores each) or a quad-core CPU (one CPU with four cores).