Suppose that two nondimensional quantities are exactly
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Engineering Mechanics: Statics
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- A block of metal measures 12 cm by 10 cm by 10 cm. When the block is hung from a spring scale, as shown in Figure 3a, the scale reads 30 kg. This is the "true mass" of the block. Suppose we attempt to measure the block's mass under water. The same mass, while hanging from the same scale, is completely submerged in water, as shown in Figure 3b. What is the reading (in kilograms) on the spring scale? Show and explain your work. Scale Figure 3a Figure 3barrow_forwardRate of heat transfer and rate of mass are the same in which they are a quantity but they differ in their sign convention and units. Select one: O True O Falsearrow_forwardCalculate, in degrees Rankine, the temperature interval of 73.6°C. Use two decimal places in your answerarrow_forward
- 1:11 1 %M Q1 15-3-2... Q1) At point A, the four forces Fs, Fc, Fp and Fg act, the lines of action for these forces are given by the straight lines AB, AC, AD and AE, as shown in Figure 1. Coordinate the points are: A 3 6. C D 8 4. 12 cm cm ст Figure 1 The magnitudes of the forces are: Fg 7 KN, F= 3 KN, F 9 KN and F= 13 KN. Represent this force F acting on the point A as a Cartesian vector and determine its direction. Q2) Figure 2 shows a rope that is stretched between points A and C, there is mass m at point B. Given values: m= 20 kg, h= 2 m, d= 3 m, a= 30°, y-60°. Determine the followings: a) What are the values of lengths LAB and Lyc must be selected according to the given angles a and y? b) What are the values of forces FAB and Fac in the rope sections AB and BC? A Figure 2 g Σ ...arrow_forwardWe have superheated steam at a pressure of 0.05 bar and temperature of 366.62 oC. What is the specific volume in units of m3/kg? Use the steam tables and report your answer to three decimal places. Note that in the steam tables, the specific volume is reported in units of m3/kg.arrow_forwardSHOW THE TABLE USED! A fixed amount of carbon dioxide goes through a polytropic process where n=1.4. The initial temperature of the CO2 is 250 K. The final temperature of the CO, is 400 K. If the mass of the CO2 is 12 kg and behaves as an ideal gas, determine the work, the change in internal energy, and the heat transfer during the process (in kJ). Note that PV=mRT. In this problem, can the carbon dioxide be considered an ideal gas at the initial conditions if the initial pressure is 150 kPa? Justify your answer quantitatively.arrow_forward
- 42 ll ? 1:59 م ٥,اك.ب/ث، 1. Find the density of an oil filled in the liquid column as shown in figure. Given that absolute pressure at the bottom is 650 kPa, atmosphere pressure is 1.0132 bar. where X=4m; Y = 4m. Z=2m. (Enter only the values in the boxes by referring to the unit given in the bracket. Do not send the hand written answer sheets to my mail) water oil Mercury The density of the oil = (unit in kg/m³) =arrow_forward42 ll l ? 1:59 م ٥,اك.ب/ث، 1. Find the density of an oil filled in the liquid column as shown in figure. Given that absolute pressure at the bottom is 650 kPa, atmosphere pressure is 1.0132 bar. where X=4m; Y = 4m, Z=2m. (Enter only the values in the boxes by referring to the unit given in the bracket. Do not send the hand written answer sheets to my mail) water oil Mercury The density of the oil = (unit in kg/m³) =arrow_forwardHow much heat is absorbed by a 27.0 g sample of water in going from liquid at 38.2 °C to steam at 119 °C and a pressure of 1.00 atm? Use the data in the following table. Express your answer in kilojoules. Pay attention to units! Some Thermal Properties of Water Property Specific heat (J/g °C) Solid Liquid Gas AHfusion (kJ/mol; at 0 °C) A Hvaporization (kJ/mol; at 100 °C) A Hsublimation (kJ/mol) Melting point (°C) Boiling point (°C) Answer: Value 2.07 4.18 2.01 6.01 40.6 50.9 0 100arrow_forward
- Answer it correctly. show solution step by step with units. Thermodynamics-Processes of Gasesarrow_forwardP-3 KN R-2 AN to Figure P1.55 1.55 The force R is the resultant of Pand Q. Determine Q and the angle 0.arrow_forwardTRUE OR FALSE Specific Volume is a measure of a fluid's resistance to deformation under shear stress. While a unit expresses a specific type of physical quantity, a dimension assigns a property of scale so that the unit can be measured. Temperature at which water has the highest density is usually taken as 4°C(39.2°F). The continuum concept in hydraulics assumes that a fluid often behaves as if itwere comprised of continuous matter that is infinitely divisible into smaller and smaller parts.arrow_forward
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