if the reading of a mercury barometer is 75.58cm at the base of a mountain and 66.37cm at the summit, what is the height of the mountain? (density of mercury= 13600kg/m³, average density of air=1.25kg/m³​

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

In the first law of thermodynamics, triangle e=q-w, what does q stand for