Eclipses, both solar and lunar, follow a cycle of just over 18 years [yr], specifically 6,585.32 days [d]. This is called the Saros Cycle. One Saros Cycle after any given eclipse, an almost identical eclipse will occur due to fact that the Earth, the Moon. and the Sun are in essentially the same positions relative to each other. The Sun, and the entire solar system, is moving relative to the Cosmic Microwave Background Radiation (the largest detectable frame of reference) at roughly 370 kilometers per second [km/s). How far does our solar system travel through the universe in one Saros Cycle? Express your answer in the following units:
a. meters [m], with an appropriate Sl prefix such that there are only one, two, or three dtgtts shown to the left of the decimal.
b. light-years: one light year= 9.46 × 1015 meters [m].
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Additional Engineering Textbook Solutions
Introduction To Finite Element Analysis And Design
Fundamentals Of Thermodynamics
Statics and Mechanics of Materials
Vector Mechanics for Engineers: Statics and Dynamics
Engineering Mechanics: Statics & Dynamics (14th Edition)
Degarmo's Materials And Processes In Manufacturing
- A 13 _is defined as the point of application of the total pressure on the surface of submerged body. [A] Mass moment of inertia [B] Total pressure [C] Centre of Pressure [D] Hydrostatic pressure A14 An oil which has a specific gravity of 0. 895.Then density of an oil is [A] 985 Kg/m [B] 8950 Kg/m? [C] 895 Kg/m? [D] 89.5 Kg/m? A 15 If atmospheric pressure is 1.013 bar and gauge pressure is 245.15 bar, then absolute pressure is equal to [A] 244.137 bar [B] 246.163 bar [C] 255.15 bar D] 220.115 bar A16 Major loss will occur in a pipe flow due to [A] Pressure difference B] Friction [C] Low flowrate [D] High velocity A 17 256.98 liter per minute = cubic meter per second. [A] 4.283x103 [B] 6.283x103 [C] 7.138x10-5 [D] 8.138x105 A 18 In Darcy-Weisbach equation, the expression for co-efficient of friction for a turbulent flow is [A] 0.79 [B] 0.079 / Re0.25 [C] 0.079 / Res [D] 16/ Re (Where Re is Reynolds's Number) The device used to determine a small or moderately high pressure difference…arrow_forwardThe following processes occurs in a reversible thermodynamic cycle: 1-2: Reversible polytropic compression at pressure [X] bar at volume [Y] m3 to a pressure [Z] bar and specific volume [A] m3/kg. The index of compression may be taken as n. 2-3: Reversibly expansion with expansion index of 2 to pressure [B] bar. 3-1: Reversible cooling at constant volume to the initial state. What are the final attempt values of X, Y, Z, A and B from the Part A of the eThuto Assessment. calculated formula similar question? X= ; Y= ; Z= ; A= ; B=arrow_forwardA B C D E Match the process, positions, and parts of an internal combustion engine using the figure. G H [7] C K A D B ✓ [Choose ] Exhaust valve Compression stroke Intake stroke Bottom Dead Center (BDC) Intake valve Combustion Chamber Combustion/Power stroke Piston Top Dead Center (TDC) Exhaust stroke [Choose ] [Choose ] E Farrow_forward
- Problem-1 Calculate the efficiency of Carnot heat engine working between high temperature reservoir(source) T1 , and low temperature reservoir (sink) T2, for each case as described in the following table. High temperature reservoir(source) T[K] 1000 Low temperature reservoir(sink) T2[K] Carnot Efficiency,Ncarnot 300 1000 150 1000 100 1000 400 1000 500 1000 600 1000 750 1000 950 1000 999 750 300 600 300 500 300 400 300 300 300 1000 -500arrow_forwardA 3 kg particle is traveling at 7i+3j+4k [m/s]. An impulse acts on the particle via a force of 11i+-17j+13k [N] which acts for 0.4 seconds. 1. What is the speed of the particle in the i-direction after the impact? [m/s] 2. What is the speed of the particle in the j-direction after the impact? [m/s] 3. What is the speed of the particle in the k-direction after the impact? [m/s]arrow_forwardT1- Ambient tempeture [k] t- inside tempeture [k] hoo-convective heat transfer coefficient of the air [W/m^2*k] t-thickness of walls[m] Kthermal conductivity (W/m-K) -(VIP) d-cube size [m] Ai-cube area inside [m^2] Ao-cube area outside [m^2] Ts-surface tempeture[k][ E-emissivity aluminium foil - Stefan Boltzmann constant W·m-2 K-4 303 290 10 0.08 0.007 1 6 6.96 300 0.03 5.67E-08 Q heat flux [W] ΔΤ ΣR F T₁ 111.0 0000 006%arrow_forward
- 5. A building needs 30 [MWh] electricity annually for appliances, and its annual heating demand is 40 [MWh]. The building is connected to a heating grid (neglect the losses in the grid), where the heat comes from the waste heat from the power plant delivering the electricity to the building. What is the amount of primary energy used annually by the building? The power plant is combustion engine based, and has an electrical efficiency of 0.35 and a thermal efficiency of 0.55. (multiple choice, one answer) 25 [MWh] 57 [MWh] 63 [MWh] 86 [MWh] 177 [MWh]arrow_forwardIn the process of cutting a metal piece to obtained chips, a cutting force of 100 N, a tangential force of 120 N, and a rake angle of 250 are applied. Use a scale and protractor, to measure off distances (forces) [R-resultant force, F-friction force and N-normal force], and friction angle.arrow_forwardHouses .18 A deep geothermal system delivers 50000 [MWh] heat at 60 [oC] yearly. The average heating demand of a house in a new-built district equipped with floor heating is 10000 [kWh]. How many houses can be heated by this geothermal ?system 5 O 500 O 5000 50000 Oarrow_forward
- A particle of mass 133 kg is traveling on a constant radius 1.1 m with a angle of 0.23*sin(0.35t). 1. What is the transverse speed at 2.6 seconds? [m.s-1] 2. What is the radial force at 2.6 seconds? [N] 3. What is the transverse force on the particle at 2.6 seconds? [Narrow_forwardAir A Water Calculate the gauge pressure, in kPa, at A, B, C, D in the reservoirs shown above. (Note that the reservoirs between A and B are connected.) Problem parameters: h1 = 1.1 [m] h2 = 0.3 [m] h3 = 0.4 [m] h4 = 0.5 [m] Density of water is 1000 [kg/m³]; Density of air is 1.225 [kg/m³]; g = 9.81 [m/s²] S.G. of oil is 0.89 h4 [m] h3 [m] h2 [m] Air B h1 [m] Oilarrow_forwardA freezer with dimensions of 4 m wide, 6 m long and 3 m high is under construction. The walls and ceiling are composed of 1.7 mm stainless steel (k = 15 W / [m ° C]), 10 cm thick foam insulation (k = 0.036 W / [m ° C]), a specific thickness of corkboard (k = 0.043 W / [m ° C]), and 1.8 cm thickness of wood (k = 0.104 W / [m ° C]). The inside of the freezer is maintained at -40 ° C. The ambient air outside the freezer is 32 ° C. The convective heat transfer coefficient is 5 W / (m K) on wooden walls and 2 W / (m² K) on stainless steel surfaces. If the outside air has a dew point of 29 ° C, calculate the thickness of the corkboard insulation that will prevent moisture condensation on the outer walls of the freezer. Calculate the heat transfer rate through the walls and ceiling of this freezer. Ignore heat transfer from floors and corners of buildings. a. Thickness of corkboard insulation = cm. b. Heat transfer rate through walls and ceilings = watt.arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY