stimate the maximum efficiency of an automobile engine that has a compression ratio of 5:1.0. Assume the engine operates according to the Otto cycle and assume γ = 1.4.

The modulus of elasticity for a ceramic material having 6.0 vol% porosity is 303 GPa. (a) Calculate the modulus of elasticity (in GPa) for the nonporous material.

List irreversibilities

A packet weighs 40kg in air but when it is totally submerged into a 1mx1m square tank the weight of the packet is only 18kg. How much does the water rise in the tank?

What is a build enviroment in construction

Multi lane roads use __ to divide lanes of traffic moving in the same direction. A. White lines B. Yellow lines C. Diagonal stripes D. Orange stripes

Just getting to your class is enough for showing up. A) True B) False

A completely reversible heat pump produces heat at a rate of 100 kW to warm a house maintained at 25℃. The exterior air, which is at 0℃, serves as the source.

A closed system undergoes a process in which work is done on the system and the heat transfer Q occurs only at temperature Tb. For each case, determine whether the entropy change of the system is positive, negative, zero, or indeterminate.

A scientist who is evaluating an ancient human skeleton for signs of vitamin and nutrient deficiency is conducting:

Which of the following is required in order to make a protected left turn A. A left green arrow B. No oncoming traffic C. A left turn only lane D. A large enough gap