Answered: What should be the height (m) of a…

What should be the height (m) of a lighthouse, so that it can be visible from a distance of 3 km? (a) 0.101 (c) 0.673 (b) 0.605 (d) 0.707

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter14: Highway Surveys And Location

Section: Chapter Questions

Problem 12P

See similar textbooks

Related questions

Q: What are the difference between Spatial Resolution and Color Resolution

A: Context: Spatial Resolution and Color Resolution

Q: Sketch the dissolved oxygen sag curve a (100-km) (D20.40.80.100) reach of the stream below the…

A: Given: Qw=5 cumecs ; Qs=22 cumecs; BOD(5) of Waste water=55mg/l ( 200 C) BOD(5) of Stream=3mg/l (…

Q: A dry sand is placed in a container having a volume of 0.0089 cm³. The dry weight of the sample is…

A: volume = 0.0089 cm3. The dry weight of the sample = 0.011 gramsthe combined weight of the soil plus…

Q: The ratio of reaction RA and Rg of the simply beam in the given figure is supported 5t 3t A 2 t/m 2m…

A: We have to find the ratio of the reactions

Q: Q: Shear force acting on a section of a beam IS 60 kn. The Section of the beam is of T- Shaped is of…

A: Shear force (V) = 60KN Determine the shear stress at neutral axis and at the junction of the web…

Q: A rectangular concrete channel (n = 0.014) has a bottom width of 5.05 m and a longitudinal slope of…

Q: For an azimuth DE=106°26:48" and angles to the right, compute the bearing of FG if angle…

A: For an azimuth DE=106026′48′′ The angle DEF=97044′52′′EFG=103015′14′′To find:compute the bearing of…

Q: -Way on a major six-lane flexible pave ghway consists of trucks of type 1 and 2 with equivalency…

A: Given-parameters for truck 1 and truck 2 are given To find-1- Equivalent dingle axle load2- Design…

Q: Q1: For the following data, calculate the "Stopping Sight Distance" and the "Passing Sight…

Q: 3m 31 3m For the frame provided below, consider the following properties * Members along Level a…

A: Please post determination of axial force diagrams and shear force diagrams as a separate question by…

Q: Q2/ If the turbine extracts 400 kW from the flow, what flowrate must be passing through the system?…

A: L1=600 md1=0.6 mL2=600 md2=0.6 mf=0.020P1=P2=atmospheric pressureZ1-Z2=105-30=75V1=0Power of…

Q: The cohesion (c), angle of internal friction (p) and unit weight (y) of a soil are 15 kPa, 20° and…

A: For the soil configuration,Cohesion, C=15 kPa,Angle of internal friction Unit weight, = 17.5 kN/m3,

Q: A fluid (sp. gr. = 0.9, u= 1.2 Pa-s) flows in a laminar state between two stationary parallel plates…

A: A fluid (sp. gr. = 0.9, = 1.2 Pa/s) flows in a laminar state.Two stationary parallel plates set 4 cm…

Q: 15. id circular rod that is 600 mm long, and 20 mm in diameter is subjected to an axial force of…

Q: A R1 6ft B 270 lb/ft 3ft ••• Ra C

Q: An embedded beam is subjected to the loads shown. Determine the stress produced at points A, B ,C, D…

Q: What are the major watersheds/drainage basins in VA? paragraph form

A: Here It is asked about the major watersheds or drainage basins in VA.

Q: - A 1.5 m wide, 2.5 m long, 0.5 m deep spread footing is underlain by a soil with c = 10 kPa, ϕ′ =…

Q: Q7:- The following data give the value of (x) and (y) for six experiments: 57 28 19 35 39 51 32 20…

Q: A simply supported beam made of 360UB56.7 (300 Plus) section. The beam has got full lateral support…

Q: Q4) (2UMS): A state of stress is specified as shown in Figure (4), By using Mohr's circle determine…

Q: 6-69. Determine the maximum moment at C caused by the moving load. 12 kN Bla 1 m -0.5 m 8 m 4 m B

A: The below beam figure is shown,To determine:-The maximum moment at C caused by the moving load.

Q: Implementing the Double Integration Method Find the moment M value that will result in a 5.011 mm…

A: Find:Moment M value that will result in a 5.011 mm deflection at the left free-end using Double…

Q: Q1/ This flood channel has Manning n 0.017 and slope 0.000 9. Estimate the depth of uniform flow for…

Q: 13. DE TERMINE THE DEFLECTION AT THE RIGHT END OF THE DEAM. 15KN Im 21 ay Im * GKN/m

Q: Determine the flexural capacity of the given section of beam below. b=280 d=420 d'=80 fc'=34 fy=350…

A: To calculate - A) Mu (NSCP 2001) B) Mu (NSCP 2015)

Q: Problem.№3- The plan of a mat foundation is shown in Figure. Calculate the soil pressure at points…

A: Plan of a mat foundation Column size 0.5m x 0.5m

Q: The spring has a stiffness k and an unstretched length lo. As shown, it is confined by the plate and…

A: To find:Determine the speed at A

Q: A layer of fine sand exists over a stratum of impervious rock. The sand layer is 6.25m thick. The…

A: Permeability=K=0.18 m/secNet head causing the flow=H=1.25+2.5=3.75 m

Q: A3. A composite beam and deck system made up of W360x72 at 1000mm o.c. is to span 8m. The deck when…

A: Section W360 x 72 @ 1000 mmfck = 25 MPaDensity of concrete = 24 kN/m3Slab thickness = 100 mmSpan = 8…

Q: -1: Find Reactions and pin force 6' A Homework 7: 20' 12k 2: Find Reactions and pin force 2' 5' 10'…

A: To find reaction and pin force

Q: 1. What is the limit of economic haul in stations? 2. What is the total cost in dollars for…

A: Find:(a) Limit of economic haul in stations(b) Total cost in dollars for excavation(c) Overhaul cost…

Q: that mother it's circumferentia ver its longitudinal strees componer B. 1666 psi 417 psa san so…

A: Inner diameter d = 4 ft thickness t =1/2 in = 0.5 in Stress = 20 ksi To find: To find the internal…

Q: A double drain consolidation test was performed on a sample of marine clay. The thickness of the…

A: Double drainH = 50 mmk = 1.753x10-8 m/min

Q: A snow load transfers the forces shown to the upper joints of the Pratt and Howe roof lattices shown…

A: The Pratt and Howe roof lattices is given below:To find:-Forces in all members of the truss using…

Q: A conical cistern is 10 feet across the top and 12 feet deep. If water is poured into the cistern at…

A: d = 10 ft h = 12 ft

Q: Use the method of angles of twist and deflection. Assume E = 200 kN/mm^2, IAB = 21 × 10^7 mm^4, IBC…

A: Analyze the given beam using the method of slope deflection.Fixed end beam:Span AB:Span…

Q: A RA 1000 lb 4 ft B 55 lb/ft VA 8 ft C Rc 6 ft 550 lb RD

A: As per company's guidelines we can only answer first question. Kindly post other questions as…

Q: The steel floor framing shown is designed to support a reading room for a library area of a…

A: Concrete load = 6/mTile load = 6/mSteel load = 0.01self weight of beam = 77*(100*150-43.75*125) =…

Q: Given Find Wo к Whenne W₂ = 400db/ft 5ft AMB. ж 7 ft Зооль ft •леасном от Beam бирролу C 000 7777

Q: The maximum number of vehicles observed in any five minute period during the peak hour is 160. If…

A: The maximum number of vehicle observed in any 5 minute period during the pick hour is 160.Peak 5 min…

Q: Q₁: Circle the most correct answer (or answers) for each of the followings: 1- The time required by…

Q: 7- The peak of a 4 hour flood hydrograph is 240 m³/sec. If the rainfall excess is 80 mm and base…

Q: Consider a rectangular channel of width b=7.5 m, in which the hydraulic jump occurs and one of its…

Q: A 6 m C -10 m- Probs. 6-67/68 30 kN B 80 KN 60 KN 2 m 30 kN -1 m

Q: A horizontal curve is being designed for a new four-lane roadway with 11-ft lanes. The PT is located…

Q: A floor has to carry a load of 12 kN/m2. The floor is supported on rectangular joists each 100 mm…

A: A Floor has to carry:Load w=12 kN/m2,Rectangular joists 100 mm wide, 300 mm deep and 4 m…

Q: Q2- Calculate the right of way of rural divided four-lane highway has a depressed median and it is…

A: Four lane highway median width = 4.0 m Embankment height = 6 m Lane width = 3.5 m Shoulder width =…

Q: The compound shaft shown is attached to rigid supports. For the bronze segment, the diameter is 75…

Q: Cars are traveling on level terrain at 64 mph on a road with a coefficient o sion of 0.8. The driver…

A: Give data Velocity of car = 64 mph or miles/hr Coefficient of adhesion = 0.8 Reaction time of…

Concept explainers

Photogrammetry

Photogrammetry is a technology of taking measurements of physical objects present in the environment, using photographs. It includes the process of recording and analyzing a three-dimension image in the two-dimension form. Photogrammetry was invented around 150 years ago in 1851 by Aimé Laussedat, he was also known as the father of photogrammetry, but this method was not in use until 50 years after its invention. This method was first used in Germany by Dr. Albrecht Meydenbauer in 1893 who was the director of the Royal Prussian Photogrammetric institute founded by him.

Question

What should be the height (m) of a lighthouse,
so that it can be visible from a distance of
3 km?
(a) 0.101
(c)
0.673
(b) 0.605
(d) 0.707

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Given -

VIEW

Step 2: Solution -

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

A man's eyes 1.75 m above sea level can barely see the top of a lighthouse which is at a certain distance away from a man. What is the elevation of the top of the lighthouse above sea level if the lighthouse is 20km away from the man. How far is the lighthouse from the man in meters if the top of the lighthouse is 14.86 m. above sea level
If the telescope at one station is 1.8 m above the water level, what is the height of the tower at the other station that will be just visible without the line of sight approaching nearer than 1.8 m to the water?
The top of tower at Point B is viewed at point A using an instrument with height of 150 cm above point A. Point A has an elevation of 20 m above sea level. a) What is the elevation of the top of tower at point B if it is 25 km away from the point A? b) How far is point A in meters if the top of the tower at point B is 15.945 m above sea level? c) What is the elevation of the tower at a distance 25 km away from the point A that will just be visible without the line of sight approaching nearer than 21.50 m to the water?
Determine the backsight or foresight distance for an instrument set up which will cause an error due to earth’s curvature and atmosphere’s refraction equal to 0.0015 m, 0.0575 m, 0.0986 m, 0.2935 m, and 0.8750 m.
B and C were observed from point A where the instrument was set up at a height of 1.25m. Point B and C were ahead of point A. Below shows the data recorded as observed for points B and C. a. find stadia constant b. find the slope distance between the telescope at point A and rod reasiny at point B. c. find the difference in elevation between between B and C.
Describe the procedure for properly focusing an optical plummet.
Neglecting the effect of tide and waves and considering the effect of curvature and refraction, determine how far out to sea a yacht will be, when a light on its mass 55m above the water disappears from the sight of a lifeguard on shore whose eye level is 1.685m above the water.
Three hills A, B and C are at elevation 135m, 146m, and 154m respectively above sea level. Distance AB is 3.9 km while distance BC is 3.1km. Find the effect of curvature and refraction between A and B Determine the effect of curvature and refraction between A and B What would be the height of the tower to be constructed at hill C so that the line of sight will clear hill B by 2.5 m considering the effect of earths curvature and refraction?
Two hills 90km apart has elevation of 60m and 200m. What would be the minimum height of the tower that could be constructed in any of the hill so that it would be inter-visible from each other considering the effect of curvature and refraction?
Two hills 90km apart has elevation of 60m and 200m. What would be the minimum height of the tower that could be constructed in any of the hills so that it would be inter-visible from each other considering the effect of curvature and refraction?ANSWER KEY: h= 23.7918m
A vertical photograph of a flat area having an average elevation of 250 m above mean sea level was taken with a camera of focal length 25 cm. A section line AB 300 m appears 15 cm on the photograph. The distance b/w images of top and bottom of the tower measures 0.5 cm on the photograph. The distance of the image of the top of the tower is 10 cm. Find the actual height of the tower.
Three hills A, B, and C are at elevations 135m, 146m, and 154m respectively above sea level. Distance AB is 3.9km while distance BC is 3.1km. a) Find the effect of curvature and refraction between A and B. b) Determine the effect of curvature and refraction between A and B. c) What would be the height of tower to be constructed at hill C so that the line of sight will clear hill B by 2.5m considering the effect of earth’s curvature and refraction?