A radioactive sample has a half-life of 10 min. What fraction of the sample is left after 40 min?
A) 1/32 B) 1/8 C) 1/2 D) 1/4 E) 1/16
Question 2
A firecracker breaks up into two pieces, one has a mass of 200 g and flies off along the x-axis with a speed of 82.0 m/s and the second has a mass of 300 g and flies off along the y-axis with a speed of 45.0 m/s.
What is the total momentum of the two pieces? A)
361 kgm/s at 56.3 from the x-axis
B)
93.5 kgm/s at 28.8 from the x-axis
C)
21.2 kgm/s at 39.5 from the x-axis
D)
361 kgm/s at 0.983 from the x-axis
E)
21.2 kgm/s at 56.3 from the x-axis
The Scale of Life 1
Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort
Life Cycle of Lobster
Comparison of the chemical structures of psilocybin and LSD. Psilocybin (left) is derived from a mu
Sample Advance Directive Cont.
Life cycle of a club fungus having two mating strains of hyphae