A simple barometer is constructed using a liquid Q¹ of density 16.2g/cm³. Calculate the least of 0.5 atmospheres.
(Density of mecury =13.6g/cm³, 1 atmosphere = 76.0cm of mecury

23

Explanation:

,mg

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.