Answer:
2.447 × 10⁴ years
Explanation:
Step 1: Given data
- Half-life of the radioactive atom (t1/2): 3,500 years
- Parent-daughter ratio ([A]/[A]₀): 1:127 (1/127)
Step 2: Calculate the rate constant
Radioactive decay follows first-order kinetics. We can calculate the rate constant (k) using the following equation.
k = ln2 / (t1/2) = ln2 / 3,500 y = 1.980 × 10⁻⁴ y⁻¹
Step 3: Calculate the time elapsed (t)
For first-order kinetics, we will use the following expression.
ln ([A]/[A]₀) = -k × t
t = ln ([A]/[A]₀)/ (-k)
t = ln (1/127) / (1.980 × 10⁻⁴ y⁻¹) = 2.447 × 10⁴ y
Answer:
B. Skeletal
Explanation:
The cell wall could be represented as the bones in our body.
It originates in the inner core of the Earth.
Answer:
Volcanoes form at B when the oceanic plate is subducted, and the plate melts and forms magma. This magma rises towards the surface and erupts as lava which forms the volcanoes. ... Magma melts through the crust and moves to the surface in a hot spot. Also a collision between two oceanic plates can form volcanoes.
Explanation:
