Can someone please answer this. i need short answer. please respect my question thanks :)​

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant