Acold drink bottle of 500 ml weight 25g .when a liquid is filled in it ,it weight 80g .find the density of liquid .

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

If y gets smaller as x gets bigger and y have an relationship?

Does heating a metal wire increase or decrease its electrical resistance? why?