tool
microscope
nothing there blind all they can see is black
It's not that you see the actually air inside a tornado, but you actually see the debris, dust, and other objects that it picks up along the way. Sometimes, however, you see the tornado because of the moist air that's inside of it, which lets you be able to see it, kind of like a visible cloud.
It actually isn't dangerous if you are driving, because the Full Moon actually helps you see in the dark.
An electron microscope is necessary to actually see a virus.
Microscope.
a sphygomanometer is actually a tool used for measuring blood pressure in your arteries. the "instrument" refers to a tool, but i do see where you got that.
It's not necessary at all. But the fact that it can be usedas a navigational tool makes it quite useful.
All chisels, saws and awls are usually very sharp.
tool
tool
it is good
Validity is the extent to which a measurement tool actually measures what we wish to measure.
The Target Spruce Tool Storage Shed includes all necessary hardware to assemble and secure the unit.
The correct spelling of necessary is necessary. Very simple. ( Actually it's in the question.)
He considered the pen as the only tool necessary to liberate the Philippines from Spain. He considered it mightier than the sword (revolution).