An nfl linebacker can go from 0 m/s to 2.5 m/s in 2.5s. what is his acceleration?

Boiling water is an example of physical change. true or false

The velocity of sound wave in air at 35°c is 353m/s, calculate the velocity of sound at 46°c

The doctor lands his tardis on a planet whose radius is 1.2x10^7m the acceleration due to gravity is 18m/s^2. what is the mass of the planet