Helium in the amount of moles 4 expands in the process 1-2. The temperature of helium in state 1 is and in state 2 it is 400 K. How much heat is delivered to helium in the process 1-2? The universal gas constant is 8.31 J/(mol. K).

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

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.

According to valence bond theory, which orbitals overlap in the formation of the bond in hf according to valence bond theory, which orbitals overlap in the formation of the bond in hf 2s on h and 2p on f 1s on h and 2s on f 1s on h and 1p on f 1s on h and 2p on f 1s on h and 3p on f