The half-life of radium 226 is 1600 years it decays into radon-222 what fraction of the original amount of radium-226 in a sample will still be radium after 8000 years. A. 1/32
B. 1/8
C. 1/16
D. 1/4

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

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3. dark matter

empty space could also be a simple vacuum