Which time frame(s) do we live in today? (More than one may apply.)
A) Quaternary period
B) Tertiary period
C) Cenozoic era
D) Phanerozoic eon
E) Paleozoic era
A) Quaternary period
C) Cenozoic era
D) Phanerozoic eon
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A sphere made of a radioactive isotope initially has a mass of 6.88 kg. The half-life of this isotope is 1.34 h, and it decays by ?- emission. At the end of 2.68 h, what is the mass of this sphere?
A) 1.72 kg B) 2.53 kg C) 3.44 kg D) 6.88 kg
A stone (the system) with a mass of 1.0 kg is tied to the end of a light string which keeps it moving in a circle with a constant speed of 4.0 m/s on a perfectly smooth horizontal tabletop. The radius of the path is 0.60 m
How much work does the force exerted by the string do on the stone as it makes one-half of a complete circle? A) 100 J B) 3.8 J C) 0 J D) 40 J E) 80 J
Give examples of four quantities which are scalars
What will be an ideal response?
How do colors differ when viewed under incandescent light and fluorescent light?