20.4 years is 20.4/10.2 = 2 half-life cycles, which means a quarter of the starting mass or 15.2 g will remain after this time.
Calculate velocity at halfway to the ground.
vfinal = root 2ad
v = root (2*9.81m/s^2*25)
v = 69.367175234 m/s
Kinetic energy = 1/2mv^2
Kinetic energy = 1/2 * (69.367175234 m/s^s^2
Ek = 2405.9025 Joules
Speciation is how new organisms arise. The fossil record's name is self-explanatory: a record of the fossil found. Natural selection is when traits that are better for survival are passed down to the next generation. Therefore, C) radiometric dating is the answer.
Answer:
9 x 10^-12 c
Explanation:
q1 = 6 C
d = 0.3 m
q2 = ?
F = 5.4 N
As te force on the second charge is in the positive X axis direction so the charge on the second particle is positive in nature.
F = K q1 q2 / d^2
5.4 = ( 9 x 10^9 x 6 x q2) / (0.3 x 0.3)
5.4 x 0.3 x 0.3 = 54 x 10^9 x q2
q2 = 9 x 10^-12 C
This loss of stable old ice has set up additional losses of sea ice cover each summer because the thinner younger ice is more easily melted during the recent warmer summers. Because of their dependence upon the sea ice for food, these changes can directly affect the carrying capacity of the Arctic for polar bears. Mark this as the brainliest answer please
