What percent of potassium-40 remains undecayed in a rock that is 3.9 billion years old? The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.
Answers:
The options
A. 1/4
B. 1/8
C. 1/16
D. 1/32
E. The answer cannot be determined
The CORRECT ANSWER IS B
B. 1/8
Explanation:
The probability of a singular paternal chromosome been found in a specific gamete = 1/2
Therefore, the probability that all the three would have a paternal source = (1/2)^n
Where,
n = 3
(1/2)^3
= 1/8
I believe the answer would be
L. l
Top- L LL, Ll,
Bottom- l Ll, ll.
Answer:
B
Explanation:
Grass obtains energy through photosynthesis. Grass produces glucose and oxygen, which in short, animals and us take in.
Answer:
Some sources of noise pollution are as follows:
(1) Televisions and transistors running at high volumes
(2) Loudspeakers and crackers
(3) Horns of buses, cars and trucks
Noise pollution can be hazardous to human health in the following ways: Hypertension: It is a direct result of noise pollution which is caused due to elevated blood levels for a longer duration.
