<span>Which of the following substance are not formed by chemical bonds? </span>A MIXTURE
Answer:

Explanation:
Average speed is given by
where
is total distance and
is time.
Plugging in given values, we get:
.
Dinosaurs but I need the whole groups yo tell you ;)
Answer:
Being a plane mirror the Image is formed 3 metres beyond the mirror . So total distance is 3+3 = 6metres
I think it is <span>Alpha rays.</span>