Radioactive Decay: Isotope A has a decay constant of 0.723 s-1 and isotope B has a decay constant of 0.514 s-1. Which isotope has a longer half-life?
A. isotope A
B. isotope B
Answer: B
Physics & Space Science
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The height of the ceiling in a typical home, apartment, or dorm room is closest to
A) 100 cm. B) 200 cm. C) 400 cm. D) 500 cm.
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How far does a beam of light travel through space in one 365-day year? (c = 3.0 × 108 m/s)
A) 30 × 108 m B) 36 × 1016 m C) 95 × 1014 m D) 80 × 1012 m E) 20 × 1015 m
Physics & Space Science
Draw all zones and layers of the Sun from the interior through the atmospheres and beyond, if needed
What will be an ideal response?
Physics & Space Science
The only two forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80°. The resulting acceleration has a magnitude of 20 m/s2. What is the mass of the body?
A. 2.4 kg B. 2.2 kg C. 2.7 kg D. 3.1 kg E. 1.5 kg
Physics & Space Science