The air in a living room has a mass of 60 kg and a specific heat (c) of 1,020 J/kg oC. What is the change in thermal energy (Q) of the air when it warms from 20 oC to 25 oC?

Diamond will scratch quartz. true or false

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

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.