a 20 watts electric bulb is used daily for 10 hours to light the entrance gate of a house how many kilowatt hours are consumed in one month?

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Explain why electric current cannot exist if a current doesn't have a voltage source.

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.