P Flag question
The half-life of zinc-71 is 2.4 minutes. If a fresh sample containing 75 grams is left to decay
to products, how much radioactive zinc will be left in 11 minutes?
Select one
64 grams
1600 grams
5.8 grams
3.6 grams

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!