Answer:
1 half life, two half lifes to equal 25 atoms left
The 1 half life gets the amount of atoms to 50
2 half lifes gets the amount of atoms to 25.
Half life takes the amount of substance and halves it every certain amount of years.
Answer:
Option C
Explanation:
Granite is composed of coarse-grained quartz and feldspars in varying proportions and due to the varying proportions of these two constituent materials, the texture of granite varies as shown in the image.
Thus, option C is correct
Options A and B and D are incorrect because the constituent material of granite is not fixed. It varies from from place to the other.
The answer is B, it is the only answer that talks about electric signals.
Answer:
the answer is D
Explanation:
it is better explain and it could pullout water
Answer:
Tissues may be defined as the group of similar cells that combine together to form a similar functions. Four main types of tissues are epithelial tissue, connective tissue, muscle tissue and nervous tissue.
Epithelial tissue are presents on the surface, body lining and lining of mouth and internal organs. The cells of epithelial tissue are one layer thick only. This means epithelial tissue that have the function of absorption are usually thick and has the large surface area that increases the rate of absorption.
