Answer:
What does this mean i don't get you??
I’m not sure if its correct but I think it’s focal Ray point
For concave mirrors, some generalizations can be made to simplify ray construction. They are: An incident ray traveling parallel to the principal axis will reflect and pass through the focal point. An incident ray traveling through the focal point will reflect and travel parallel to the principal axis.
Answer: question 1 is b I believe
Explanation:
every action has an opposite reaction
Answer:
21600
1296000
Explanation:
Full cycle consists of

1 hour = 3600 seconds
1 minute = 60 seconds
Converting to arcminutes

The arcminutes in a full cycle is 21600
Converting to arcseconds

The arseconds in full cycle is 1296000