PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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Represent the following combinations of units in the correct SI form using an appropriate prefix: MN/kg.ms
A five-cylinder, 3.5-liter SI engine operates on a four-stroke cycle at 2500 RPM. At this
condition, the mechanical efficiency of the engine is 62% and 1000 J of indicated work are
produced each cycle in each cylinder.
Calculate:
Brake power in kW and hp.
Torque. [N-m]
Q.1
(a) Represent each of the following combinations of units in the appropriate prefix:
(i) kN/us
(ii) Mg/mN
(iii) MN/(kgoms)
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- 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 kilotonsarrow_forward1-) 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).arrow_forwardOne can change the system energy by work (W) and by heat transfer (Q). In a closed system, this is described by the following relation: AE = Q - W Enter the SI units (abbreviated as expected, for example, m instead of meter) for Q and W in the following format: X, Xarrow_forward
- 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).arrow_forwardExpress the specific weight, in U.S. Customary units(lb / in.3), of a specimen of material that has a density of4500 kg/ m3arrow_forwardASSIGNMENT Complete the table below with the correct values in two decimal places, but "v" must be in five decimal places. A. Assume g = 30.50 ft/s² and V = 6ft³. v (m³/kg) p (kg/m³) a b с d e f 0.01500 1700 y (kN/m³) 9 m (kg) 125 p (lbm/ft³) 90 W (lb) 270arrow_forward
- What volume (in m3) of natural gas would it take to generate 5.94 x 108 J of energy if the energy content of natural gas is 36.9 MJ/m3 [round your final answer to one decimal place]?arrow_forwardConsider the beam below with F = 9 kN. Neglect the thickness of the beam. F A 4 3 -2 m 5 OB -2 m- -2 m a) Determine the magnitude of the horizontal component of the reaction force at point A. Provide your answer in kN to 4 decimal places. Magnitude of the horizontal component of the reaction force at point A [kN] = b) Determine the magnitude of the vertical component of the reaction force at point A. Provide your answer in kN to 4 decimal places. Magnitude of the vertical component of the reaction force at point A [kN] = c) Determine the magnitude of the vertical component of the reaction force at point B. Provide your answer in kN to 4 decimal places. Magnitude of the vertical component of the reaction force at point B [kN] =arrow_forwardHandwritten and the unit should be in metric system. Three kilograms of water at 35 degrees Celsius are placed in a piston under 4.335MPa (State 1). Heat is added to the water at constant pressure until the piston reaches a stop at a total volume of 0.55 m3 (State 2). Most heat is added at constant volume until the temperature of water reaches 425 degrees Celsius (State 3). Determine (a) the quality of fluid and the mass of the vapor at State 2, and (b) the pressure of the fluid at State 3.arrow_forward
- Represent the following quantities in the correct SI form using an appropriate prefix: 0.00532km.arrow_forwardAn insulated, constant-volume system containing 1.36 kg of air receives 53 kJ of paddle work. The initial temperature is 27 C. Determine (a) the final temperature [1 decimal place] and (b) the change of internal energy [whole number].arrow_forwardThe 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].arrow_forward
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