Transverse wave is <span>a wave vibrating at right angles to the direction of its propagation.
In short, Your Answer would be Option B
Hope this helps!</span>
18. When we conduct an experiment the condition we are investigating the one thing we want to know about is called the:
b. hypothesis - we are conducting the experiment in order to validate or invalidate the hypothesis
19. The group of experimental subjects that is left “natural” or left unchanged is called the:
a. control group - we need to have a reference point for our experiment to check if something has changed, how much have been changed or if have not changed at all.
20.The group of experimental subjects that has the one condition changed is the:
b.experimental group
- on this grump we make changes and compare the results with the control group
21. When the experiment is complete the researcher:
c. analyzes the data and comes to a conclusion - after experiments the data are analyzed to see if the hypothesis is proved of not.
Answer:
This is because sodium chloride has electrostatic forces of attraction and thus this tends to hold the the sodium and chloride ions very strongly and thus responsible for the high melting point. Sodium chloride is very soluble in water than naphthalene.
Explanation:
Answer: Atoms of different elements can combine to make new substances or different types of matter.
Explanation:
A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements
For example: To form water, some atoms fuse together and form molecules. (H2O).
