15. during a power shutdown a room is losing thermal energy at a rate of 1.0-kw due to heat transfer through its walls to the street. find the increase of entropy of a "mini-universe" (the room and the street) during 1 hour, assuming the temperature of the room +20°c does not change noticeably during this time, while temperature in the street outside remains -10°c. a) 1.40 kj/k b) 0.89 kj/k c) 1.68 kj/k d) 1.96 kj/k e) 2.24 kj/k

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.

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f

Takumi works in his yard for 45 minutes each saturday. he works in the morning, and he wears sunscreen and a hat each time he works in the yard. what does takumi hope to reduce through his actions? the likelihood of stochastic effects, such as dna mutations the severity of stochastic effects, such as cancer the severity of non-stochastic effects, such as cancer the likelihood of non-stochastic effects, such as radiation sickness