The half-life of arsenic-76 is 26.7 h. What are its (a) decay constant and (b) mean life?
What will be an ideal response?
(a) 0.0260 h-1 (b) 38.5 h
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A European sports car dealer claims that his car will accelerate at a constant rate from rest to 100 km/hr in 8.00 s. If so, what is the acceleration? (Hint: First convert speed to m/s.)
a. 3.47 m/s2 c. 11.4 m/s2 b. 4.63 m/s2 d. 18.5 m/s2
What happens because of the formation of atoms?
A.) Nucleosynthesis. B.) Formation of protons. C.) Formation of quarks. D.) The cosmic microwave background is produced. E.) The Universe starts to contract.
An umbrella has a tendency to move upward when it is windy principally because
1) moving air over the curved surface produces reduced pressure against its top. 2) air moves up into the "bowl" and pushes upward with increased pressure. 3) buoyancy increases with increasing wind speed. 4) the umbrella is simply pushed upward by the wind. This effect was first accurately described by 5) Galileo. 6) Newton. 7) Bernoulli. 8) Einstein. 9) Archimedes.
Because more massive stars have more gravitational energy, they can fuse heavier nuclear fuels
a. True b. False Indicate whether the statement is true or false