What physical properties require no tools?

What are the characteristics of orbitals? What is the advantage of fault tolerance? Half-cell reactions when metallic zinc is dipped into a solution of copper sulphate? Do rocks on the ocean floor contain iron emit a magnetic field? What is the difference between gonorrrhea and trichomoniasis? What is Gram positive cocci in throat culture? Which cardinal direction does the earth rotate? How much longer will the earths core have heat? What color is Mizar? What are the threats of technology to mankind? Is ring of fire and the equator isame? What is a physical map of the human genome? Is a fir tree a nonvascular or vascular? What is the purpose of fruit? Red blood cells megakaryocyte eosinophil basophil monocyte neutrophil and lymphoctes are all examples of what? What did Rudolf Virchow figure out? In which layer would weather systems have the greatest effect on living things? How do the electron's in a metallic bond affect the metal? What kind of services and products do Cyclone Music provide? Why is it said that the nucleus of an atom contains almost the entire mass and not the entire mass?

What physical properties require no tools?