Calculate the root-mean-square speed of a nitrogen molecule and hydrogen molecule at room temperature (27°C).M=28g/mol and 2g/mol for nitrogen and hydrogen, respectively and k=1.38×10^-²³J/K​

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

Difference between series and parallel circuits

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.