Chapter 1, Problem 8P

shear stress at the plate boundary and at y = 0.15 m from the plate. [Ans. 1.20 N/m², 1.08 N/m²]

A commonly used unit in everyday language to state weight is the pound (lb). There are actually several formal definitions of pound. One classification system defines a pound-mass (analogous to kg in SI units) and a pound-force (lbf) (analogous to a Newton); this is formally called English Engineering units but also commonly used in US Customary System units. The “pound” in the “pounds per square inch” of psi refers to pound-force. Hence, psi has units of force per area. Note that 1 lbf is defined as the gravitational force generated by 1 lb (mass) by multiplying it by the standard gravitational acceleration at the earth’s surface. Starting with just the two everyday conversion approximations every Canadian should know (1.00 kg ≈ 2.20 lb (mass) and 1.00 inch ≈ 2.54 cm), derive an approximation of 1.00 psi in Pa through unit conversions only (show each step).

The Ideal gas law shows the relationship between some common properties of ideal gases and is written as PV = nRT. P = pressure, V = volume, n = number of moles of ideal Gas, R = General gas constant = 8.314 kJ/(kmol.K) and T = absolute temperature. 5 mol ideal gas at 22°C is placed in a cube with edge lengths of 0.750 meters. Calculate the pressure of the Ideal gas as [Pa].

The pressure of the gas inside an aerosol can is 1.2 bar at a temperature of 25°. Will the aerosol explode if it is thrown into a fire and heated to a temperature of 600°C? Assume that the aerosol can is unable to withstand pressures in excess of 3 bar show cancellation of units and formula used

Figure 1 of 1 B 20 m A 30 m

Some scientists believe that the collision of one or more large asteroids with the Earth was responsible for the extinction of the dinosaurs. The unit of kiloton is used to describe the energy released during large explosions. It was originally defined as the explosive capability of 1000 tons of trinitrotoluene (TNT) high explosive. Because that expression can be imprecise depending on the explosive's exact chemical composition, the kiloton subsequently has been redefined as the equivalent of 4.186 x 1012 J. In the units of kiloton, calculate the kinetic energy of an asteroid that has the size (box-shaped, 13 x 13 x 25 km) and composition (density, 2.4 g/cm) of an asteroid. Kinetic energy is defined by U. = mv? where m is the object's mass and v is its speed. Objects passing through the inner solar system generally have speeds in the range of 20 km/s. (Express your answer using two significant figures.) Uk = x1011 kilotons

Question 2.8: Compressed air is commonly used to power a large variety of power tools. Lowe's sells an air compressor that can fill an 8-gallon tank to 160 psi. At a temperature of 70°F, determine the mass of the air inside a full 8-gallon tank. Let Patm = 14.7 psi. a) Use the ideal gas law (you will need to do a lot of unit conversions for this). [0.429 kg] b) Find the compressibility factor. How far off is your analysis above? [0.99]

1-) Represent each of the following with SI units having an appropriate prefix: (a) 6753 ms, (b) 7656 N, (c) 0.945 kg, (d) 34.5(106) N, and (e) 0.00683 km. II-) Round off the following numbers to three significant figures: (a) 67475 m, (b) 26.554 s, (c) 7555 kg, and Evaluate each of the following to three significant figures and express each answer in Sl units using an appropriate prefix: (d) 425 GN/32.5 mm, and (e) (0.00356 Gg)(402 ms).

You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 28.5 N. You carefully add 12 BTU of heat energy to the sample and find that its temperature rises 24℃. What is the sample’s specific heat in kJ/(kg∙K)?