Answered: A 100 W incandescent lamp (2725 lm)…

A 100 W incandescent lamp (2725 lm) illuminates a 120 ft2 (11.15 m2 ) surface. Determine the average illuminance of the surface in foot candle and lux. (With explanation)

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter8: Direct Use Of Solar Energy

Section: Chapter Questions

Problem 10P

See similar textbooks

Related questions

Q: 7. The sketch shows a test of an electrostatic air filter. The pressure drop for the filter is 3…

Q: A typical ceiling of a house consists of items shown in the accompanying table. Assume an inside…

A: Given: The inside room temperature is 21oC. The attic air temperature is -10oC. The exposed area is…

Q: A cylindrical tank 1m in diameter and 3m tall weighs 3.86kN. Given: ylead = 100kN/m3. 14. Which of…

Q: Problem 6-76 Oil is flowing upward through a Venturi meter as shown Assuming discharge coefficient…

Q: The heat exchanger radiates thermal energy at the rate of 2500 kJ/h for each square meter of its…

Q: An engineer uses a solar-powered submersible pump to supply 20°C ground water to an above-ground…

A: d = 2cm = 0.02m = 20mm A = 3.1416 x 0.022/4 = 0.00031416m2

Q: 10. Calculate the density, specific weight, and specific volume of chlorine gas at 25°C and pressure…

Q: Water flows from a large reservoir at the rate of 1.20 ft/s through a pipe system as shown in Tigure…

A: To calculate the amount of energy loss (HL)-

Q: Q2: Air stream at 27°C moving at 0.3 m/s across 100 W incandescent bulb, glowing at 127 °C. If the…

Q: A heat load calculation is being done to determine how much heat is beinglost through a wall. The…

A: To calculate the net area of the wall, We have to reduce the area of the window from it. Breadth of…

Q: A well-insulated and perfectly sealed room is installed with 4-hp fan to circulate air for 1.5…

Q: 2. Calculate the discharge through the venturimeter.

A: Thanks for your question. As per honour code we will answer the first question since exact one was…

Q: . How much water will overflow if the water is heated to 80°C

A: FLUID MECHANICS

Q: 8. A vertical Venturi meter, 150 mm in diameter is connected to a 300-mm diameter pipe. The vertical…

A: Venturi meters generally flow measurement instruments that use a converging section of make an…

Q: The R- value for a 50 mm wood fiber insulation board (k= 0.044 W/m.K)=…

A: Note:- As per our company guidelines we are supposed to answer ?️only first 3️⃣ sub-parts. Kindly…

Q: Water enters a 11 horizontal nozzle with a square cross section of 18 by 18 at a speed of 11. The…

Q: A classroom that normally contains 40 people is to be air-conditioned with window air-conditioning…

A: Given: The total number of people in the classroom is 40. The cooling capacity of window…

Q: Assume 40% of the light emitted by a 1000 W metal halide lamp (110,000 lm) illuminates a surface…

A: Given Data: Utilisation factor, Uf = 40% =0.4 Luminous flux, ϕ= 110000 lm Diameter of illuminated…

Q: 2. In the figure shown, a liquid is pumped from reservoir A to tank B by a 12 hp pump having an…

Q: Find the discharge of water through a venturimeter with inlet and throat diameters 300mm x 150mm…

Q: 1-34 A 4-kW resistance heater in a water heater runs for 2 hours to raise the water temperature to…

A: E = 4 KW x 2 hrs E = 8 kWh

Q: determine the moment of inertia about the y axes for the shaded area. submit your solution via email…

A: assumed b,side of rectangle=40mm,d, depth of rectangle=60 mm D=diameter of quarter circle=2*20=40…

Q: 3. COMPUTE FOR SPACING BETWEEN LIGHTING UNITS TO PRODUCE AVERAGE LUX STREET WIDTH = 10M MOUNTING…

Q: A horizontal venture meter is used to measure fluid flow from the tank with the inlet and throat…

Q: A fan is to be selected to ventilate a bathroom whose dimensions are 2 m × 3 m × 3 m. The air…

Q: Determine the work done by an electric motor lifting an elevator weighing 4 kN through five floors;…

A: Given: Weight of lift, W = 4 kN = 4000 N Number of floors, n = 5 Distance between each floor, d = 3…

Q: Calculate the volume (in L) occupied by 5.2 kg of CO2 at 152 kPa and 315K

Q: The measured distance from A to B was 300.0m. The tape used has a standard length of 30m, at 20 °C…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A water heater supplies (47+3)kW of power in the form of heat to water. If the (47 + 300)kg of water…

A: It is required to determine the work done of heater. It is required to determine the amount of heat…

Q: A stove element draws 15 A when connected to a 240-V line. How long does it take to consume 60 kJ .

A: Given: The current is 15 A. The voltage line is 240 V. The energy is 60 kJ.

Q: The air inside a hot-air balloon is heated to 72.00 °C (Tinitial) and then cools to 52.00 °C…

Q: A clean tube of internal diameter 3 mm is immersed in a liquid with a coefficient of surface tension…

Q: The diameter and depth of cylindrical tank are 9m and 4m respectively. This tank contains brimful of…

A: As the temperature is increased the liquid will expand(decrease in unit weight). However the weight…

Q: If heat absorbed by the engine 15,000 Joule and Low temperature of 450 K High temperature of 850 K,…

Q: COMPUTE FOR SPACING BETWEEN LIGHTING UNITS TO PRODUCE A VERAGE LUX STREET WIDTH = 10M MOUNTING…

Q: An open, clean glass tube, having a diameter of 2.8 mm, is inserted vertically into a dish of…

A: \\\\\\\\\\\\\\\\\\

Q: Calculate the evaporation rate from an open water source, if the net radiation is 300 W/m2 and the…

A: According to given data if the net radiation is 300 W/m2 ir temperature is 30° Assuming value of…

Q: A fan delivers 4m^3 of air per second at 20 degrees celsius and 1.2 bar. Assuming molecular weight…

A: Given: The volume of air is 4 m3. The temperature is 20oC. The pressure is 1.2 bar. The molecular…

Q: COMPUTE FOR SPACING BETWEEN LIGHTING UNITS TO PRODUCE AVERAGE LUX • STREET WIDTH = 10M • MOUNTING…

A: given, lamp lumen (L) = 5000 lumen street width (W)= 10 m mounting height(H) = 10 m luminaire type…

Q: pump discharges 1129.52 kg/min of water to a vertical tank (10ft dia by 15 ft height). Find the…

Q: 9- A bowling ball of mass 7.5 kg travelling at 10 m sec rolls off a horizontal table 1 m high.…

A: given U = 10m/s height of table 1 m g= 10m/s2

Q: PS 7 Kerosene Air B 10 сm cm 21cm 9cm cm Benzene Mercury Water

Q: Water (assumed inviscid and incompressible) flows steadily from the large tank shown in the figure…

A: D1=1m=D2 To find discharge and air pressure

Q: Residential annual energy use. For a house with: Air exchange rate of 0.5 h−1 Cp = 1000 J/kg.K…

A: Given data- Air exchange rate of 0.5 h−1 Cp = 1000 J/kg.K Density of air = 1.2 kg/m3 Roof area = 144…

Q: Question 12 Four light bulbs, rated at 100 W, 75 W, 50 W and 25 W each, are in parallel. What is the…

A: step 1-

Q: 1. COMPUTE FOR SPACING BETWEEN LIGHTING UNITS TO PRODUCE AVERAGE LUX • STREET WIDTH = 15M • MOUNTING…

Q: 11. The velocity through a pipe of diameter 0.5 meters is 7.5 meters/sec. Total head (including…

A: given- dia of pipe d=0.5 mvelocity v=7.5 m/shead difference h=4.5 m

Q: Water flows within the rectangular channel shown with a flow of 8 m3/s. Given that the specific…

A: We are allowed to attempt only 3 sub-parts. Since the specific sub-parts are not mentioned, we are…

Q: TIA the formula. 191 Air (y w0.20 bem ELABORATE 48 in Try to solving these problems: 30 1. Estimate…

Q: ACE-161 Irrigation System" 3 m End View A three meter pipe squirts water out of tiny holes uniformly…

A: Given : Length of pipe, L = 3 mVolume of discharge of water, Q = 10 gallons/minPipe is suspended 1 m…

Concept explainers

Electrical Plans

An electrical plan is also known as an electrical drawing or a wiring diagram. It is a kind of visual representation which bears the blueprint symbols of all the electrical components in electrical house plans or various building construction projects. In other words, electrical plans describe electrical circuits and systems that build up the electrical house plans or building plans. An electrical engineer who works on various construction projects creates an electrical drawing. The engineer outlines the electric planning with different symbols and lines forming a detailed electrical circuit. These drawings are a means of representation for the clients, who will carry out the actual wiring process. In a nutshell, an electrical plan showcases the circuitry with the proper placement of electric components.

Question

A 100 W incandescent lamp (2725 lm) illuminates a 120 ft2 (11.15 m2 ) surface. Determine the average illuminance of the surface in foot candle and lux. (With explanation)

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

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

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

Assume 40% of the light emitted by a 1000 W metal halide lamp (110,000 lm) illuminates a surface with the area of a 32-ft diameter. 1. Determine the average illuminance of the surface in foot candles. 2. Determine the average illuminance of the surface in lux.
Calculate the heat loss from a double-pane glass window consisting of two pieces of glass, each having a thickness of 10 mm with a thermal conductivity of k = 1.3 W/m.K . The two glass panes are separated by an air gap of 7 mm. Assume thermal conductivity of air to be k = 0.022 W/m.K .
Complete the following sentences (showing your calculation): The R- value for a 50 mm wood fiber insulation board (k= 0.044 W/m.K)= ……….................................................................................................... The U- value for a 120 mm clay roofing tile (k= 0.75 W/m.K)= .................. The light solar gain ratio for a window with the following characteristics (U= 1.11 W/m2.K, SHGC = 86%, VT= 90%)…………………………………………………………. In a room (8*6*3.5) if the total heat losses is 1000 Watt and the percentage of ceiling losses from total was 20% , if we treat just the ceiling such that we reduce her losses by the half what will be the new total losses for the room …………………………………………………….........................................................…..
Estimate the vapor pressure, air pressure, relative humidity, and air density at a height of 1500 m into the atmosphere. The total pressure is 100 kPa, air temperature is 28°C and the dew point temperature is 16°C near the ground, the lapse rate 6°C/km, which is constant for both air temperature and dew point temperature. The gas constant R is 287 J/kg-K and constant with respect to altitude. Relative Humidity at 1500m, in % Round to one (1) decimal place
The discharge of water collected from a constant head permeameter in a period of 15 minutes is 500 ml. The internal diameter of the permeameter is 5 cm and the measured difference in head between two gauging points 15 cm vertically apart is 40 cm. Calculate the coefficient of permeability in mm/s. a.0.106 b.0.3788 c.1.23 x 10^(-2) d.0.750
A 10m dia. Cylindrical tank has a height of 5m and is full of water at 20ºC (unit weight of water=9.789kN/m3). If the water is heated to a temperature of 50ºC (unit weight of water=9.689kN/m3 ). a. Compute the weight of water. b. What is the final volume when heated to a temp. Of 50ºC? c. Determine the volume of water that will spill over the edge of the tank.
Estimate the vapor pressure, air pressure, relative humidity, and air density at a height of 1500 m into the atmosphere. The total pressure is 100 kPa, air temperature is 28°C and the dew point temperature is 16°C near the ground, the lapse rate 6°C/km, which is constant for both air temperature and dew point temperature. The gas constant R is 287 J/kg-K and constant with respect to altitude. Air Density at 1500m, in kg/m3 Round to three (3) decimal places
Estimate the vapor pressure, air pressure, relative humidity, and air density at a height of 1500 m into the atmosphere. The total pressure is 100 kPa, air temperature is 28°C and the dew point temperature is 16°C near the ground, the lapse rate 6°C/km, which is constant for both air temperature and dew point temperature. The gas constant R is 287 J/kg-K and constant with respect to altitude. Air Pressure at 1500m, in kPa Round to two (2) decimal places
A cylindrical tank 1m in diameter and 3m tall weighs 3.86kN. Given: ylead = 100kN/m3. 14. Which of the following most nearly gives the weight of the lead that must be placed inside the tank to make the top of the tank flushed with water surface?
A vertical cylindrical tank having a base diameter of 12 m and a height of 5 m is filled to the top with water at 20°C. How much water will overflow if the water is heated to 80°C? Answer 16.46 tons
A fan delivers 4m^3 of air per second at 20 degrees celsius and 1.2 bar. Assuming molecular weight of air as 28.97, calculate the specific volume and specific weight of the air being delivered.