Both cocaine and heroin will effect your concentration. You do not want to take these substances and then get behind a wheel.
No. You use a crack pipe to smoke rock cocaine. A spoon is used for substances you inject. Heroin comes directly to the minds of most people, but the spoon is very versatile. You can inject and use a spoon for cocaine, but not for his brother crack. Actually a spoon is used for many that cook cocaine into it's crack form. It cooks out most of the cut used in cocaine and leaves a rock if done correctly.
Cocaine and heroin are two totally different chemicals, and require totally different tests be applied. For dip-stick testing you need a stick for cocaine and another for heroin; assay testing requires two different programs in your machine.Given that, if you're running SAMSHA-5 drug tests by either methodology, you'll have both a cocaine test and a heroin test.
No, Heroin is derived from opium coming form the poppy. Cocaine comes from the coca leaf.
no.
Either heroin, or cocaine.
No.
Let me start by stating that I assume you meant "heroin". Anyway, no, the chemical structures of these compounds are completely different. Heroin is derived from morphine whereas cocaine is a tropane alkaloid. Thus, it is not possible to convert cocaine to heroin.
Don't do it!!!
Speeball
Depends on what you mean by strong, both of these drugs come in a wide variety of quality that vary greatly in strength. Both drugs also interact with the mind and body in different ways, making it hard to say which one is "stronger".
snort it, smoke it, or inject it