Which device is used to increase or decrease the voltage of an alternating current? A. A commutator B. A generator C. A motor D. A transformer

Acar travels 40m in 8 seconds find the car speed

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr

Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a.sample absorbance at 315nm a 0.45 b 0.80