What are two characteristics of a scientific information source that may indicate the information is on reliable

Scientific information refers to something, which is certified through peer review and is published in scientific journals. However, there are certain scientific information, which is not reliable and this can be identified by looking at certain characteristics:  

1. The references are not cited, that is, it is not known or is unclear that from where the information came.  

2. The information is dependent on studies, which are not peer-reviewed, that is, the information has not been reviewed by the experts, or is not encouraged by a consensus of experts in the field.  

there's the proffessional site that will you.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves