b) A spherical infrared heater of radius 6.5 cm has an emissivity of 0.85. What temperature must it run at if the required power is 0.4 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm²²K-4) The temperature of the heater in Celsius

b) A spherical infrared heater of radius 6.5 cm has an emissivity of 0.85. What temperature must it run at if the required power is 0.4 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm²²K-4) The temperature of the heater in Celsius

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 121AP: An infrared heater for a sauna has a surface area of 0.050 m2 and an emissivity of 0.84. What...

See similar textbooks

Related questions

Q: A spherical body of area A and emissivity e=0.5 is kept inside a perfectly black body. Energy…

A: According to Stephan's Boltzman law, P=σAT4 ; for black body P = σeAT4; for any other body

Q: An electric immersion heater has a power rating of 1800 W. If the heater is placed in a 1.3 kg of…

A: Given data: Mass (m) = 1.3 kg Initial temperature (Ti) = 30°C Final temperature (Tf) = 100°C…

Q: The filament of a 75-W light bulb is at a temperature of 3300 K. Assuming the filament has an…

A: Write the equation to calculate the power radiated by the bulb

Q: A copper telephone wire has essentially no sag between poles 34.0 m apart on a winter day when the…

A: Given data: Original Length (L0) = 34.0 m Initial temperature (T0) = -20.0°C Final temperature (T)…

Q: ume that your skin has an emissivity of 0.700, a normal temperature of 32.0 °C, and your area of…

A: Given:- The emissivity e = 0.700 The temperature T = 32.0oC= 305.15 K The Area A = 1.80 m2 Find:-…

Q: A copper telephone wire has essentially no sag between poles 41.0 m apart on a winter day when the…

A: Given data: Original Length (L0) = 41.0 m Initial temperature (T0) = -20.0 °C Final temperature (T)…

Q: Which of the following formulas relating temperatures on the Celsius and Fahrenheit scales is…

A: The formula to convert Celcius to Fahrenheit scale is as follows: TF-32180=TC100where TC is…

Q: Measurements on two stars indicate that Star X has a surface temperature of 5727°C and Star Y has a…

Q: A meat smoker has a surface temperature of 422 K, a surface area of 1.67 m2, and an emissivity of…

A: Surface temperature of meat smoker (T) = 422 K Surface area (A) = 1.67 m2Emissivity (e) = 0.95…

Q: A copper telephone wire has essentially no sag between poles 35.0 m apart on a winter day when the…

Q: The Earth intercepts 1.27 × 1017 W of radiant power from the Sun. Suppose the Earth, of volume 1.08…

Q: In order not to damage the resistance in the kettles, the difference between the temperature of the…

Q: If a blackbody is radiating at T=1330 K at what wavelength is the maximum intensity?

A: According to Wien's displacement law the black body radiation curve for different temperatures peaks…

Q: An expensive vacuum system can achieve a pressure as low as 1 ×10-´N/m² at 20 °C. How many atoms are…

A: The pressure,

Q: A pair of eyeglass frames are made of epoxy plastic (coefficient of linear expansion = 1.30 x 10-4…

A: The expression for the required temperature from length expansion is,

Q: The filament of a 75-W light bulb is at a temperature of 3 300 K. Assuming the filament has an…

A: The expression required area is,

Q: To help keep his barn warm on cold days, a farmer stores 860 kg of solar-heated water (Lf = 3.35E+5…

A: Given Mass of the water m =860 kg so the energy released by the water from cooling this to 11.8oC…

Q: 2) A spherical infrared heater of radius 6.75 cm and an emissivity of 0.79 radiates 0.56 kW of…

Q: It is often argued that the head is the most important part of the body to cover when out in cold…

A: Given, Time=19.4min We have to use stefans law here

Q: An expensive vacuum system can achieve a pressure as low as 1.00 x 10-7 N/m² at 25.5 °C. How many…

Q: A cylindrical surface of radius 43 cm and length 2.4 m maintained at a temperature of 120°C is…

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

Q: A student is trying to decide what to wear. His bedroom is at 20°C. His skin temperature is 35°C.…

A: Sigma( σ ) = Stefan Boltzmann constant =5.67×10^-8 W/m^2.K^2

Q: The titanium shell of an SR-71 airplane would expand when flying at a speed exceeding 3 times the…

A: The length of the rod L0 at 0 degree Celsius and the length of the rod L at T degree Celsius can be…

Q: -8 A blacksmith is flattening a steel plate that measures 10 cm x 15 cm x 1 mm. He has heated the…

Q: Light bulb 1 operates with a filament temperature of 2500 K, whereas light bulb 2 has a filament…

A: T1=2500k. T2=1900k.

Q: The side surfaces of a 3-m-high cubic industrial furnace burning natural gas are not insulated, and…

Q: At the top of Earth’s atmosphere, sunlight has an averageintensity of 1360 W>m2. If the average…

A: The average intensity of sunlight, The average distance from Earth to the Sun,

Q: An expensive vacuum system can achieve a pressure as low as 1 × 10-N/m² at 20 °C. How many atoms are…

A: Given data: Pressure P=1×10-7 N/m2 Temperature T = 20oC Volume V = 1 cm3

Q: 7. Compute for the radiation energy of an ideal radiator with radius 6.7 m in a temperature of 39°C.

A: Given value--- radius = 6.7 m . temperature = 39 degrees C. We have to find--- radiated energy?

Q: Consider steady heat transfer between two large parallel plates at constant temperatures of T1 = 290…

A: Since you have uploaded a question with multiple sub-parts, we will solve the first three sub-parts…

Q: An electronic package with a surface area of 1 m2 placed in an orbiting space station is exposed to…

A: Since the generated heat rate equals the emitted heat rate, the packaging surface temperature can be…

Q: A copper telephone wire has essentially no sag between poles 41.0 m apart on a winter day when the…

A: Given data The original length is L = 41 m The initial temperature is -20 C The final temperature is…

Q: Two very long concentric cylinders of diameters D1 = 0.35 m and D2 = 0.5 m are maintained at uniform…

A: Write the expression for the total rate of radiation heat transfer between the two given cylinders.

Q: A copper telephone wire has essentially no sag between poles 35.0 m apart on a winter day when the…

A: Change of length = ∆L Length (L)= 35 m Initial temperature (Ti) = -220 c Final temperature (Tf) =…

Q: approximation, the human body may be considered to be a cylinder of length L=2.0m and circumference…

A: Given:- the human body may be considered to be a cylinder of length L=2.0m and circumference…

Q: What is the net heat current in radiation of an Ice cube at 0 °C if the surrounding air is at 20°C?…

A: Given Data, Temperature of the Ice cube (Ti)=00C Temperature of surrounding (Ts)=200C Length of ice…

Q: The tungsten filament of a light bulb has an operating temperature of about 2100 K. If the emitting…

Q: 1. Radiation is the chief method of energy transfer А. from the Sun to Earth satellite С. from water…

A: 1. In radiation the two bodies should not be in contact. Out of all the options, sun and earth…

Q: Based on the definition of a black body, every object other than a black body will have an…

Q: The maximum flow rate of standard shower heads is about 3.5 gpm (13.3 L/min) and can be reduced to…

A: a) Write the balanced equation for the energy,

Q: Väriation of the magnitude of the gravitations force (y) between two uniform spherica! masse with…

Q: A wire of length 7,6 m and radius 2,5 mm is heated by the electric current to the temperature…

Question

b) A spherical infrared heater of radius 6.5 cm has an emissivity
of 0.85. What temperature must it run at if the required power
is 0.4 kW? Neglect the temperature of the environment.
(Stefan's constant = 5.67*10-8 Wm-²K-4)
The temperature of the heater in Celsius
||

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, physics and related others by exploring similar questions and additional content below.

Similar questions

An infrared heater for a sauna has a surface area of 0.050 m2 and an emissivity of 0.84. What temperature must it run at if the required power is 360 W? Neglect the temperature of the environment.
A water heater is operated by solar power. If solar collector has an area of 6.00m2 , and the Intensity delivered by sunlight is 550W/m2 , how long does it take to increase the temperature of 1m3 of water from 20°Cto 60°C?
The Sun has a diameter of approximately 1.4 x 109 m and a surface temperature of about 5650 C. Assuming that the Sun radiates as a blackbody with emissivity of unity, calculate the power radiated by the Sun into the solar system, which you can assume is at the temperature of the microwave background radiation.
if a wafer with 350μm thick resist is baked on a hot plate that is 0.1◦ off-horizontal, what will be the resist non-uniformity due to gravitational flow?
the filament of a 150 watt bulb maybe considering a black body radiating inti black enclosure at 70 C. considering only radiation, calculate the filament temperature in C if the filament diameter is 0.20 mm. and length is 8 cm.
Assume that your skin has an emissivity of 0.700, a normal temperature of 32.0 °C, and your area of 1.80 m2. How much total power do you radiate?
A copper telephone wire has essentially no sag between poles 35.0 m apart on a winter day when the temperature is – 200 C. How much longer is the wire on a summer day when the temperature is 350 C. a=17x10^-6/ °C
A copper telephone wire has essentially no sag between poles 34.0 m apart on a winter day when the temperature is −20.0°C. How much longer is the wire on a summer day when the temperature is 38.0°C?
A 2.1-m-long, 0.2-cm-diameter electrical wire extends across a room that is maintained at 20°C. Heat is generated in the wire as a result of resistance heating, and the surface temperature of the wire is measured to be 180°C in steady operation. Also, the voltage drop and electric current through the wire are measured to be 110 V and 3 A, respectively. Disregarding any heat transfer by radiation, determine the convection heat transfer coefficient for heat transfer between the outer surface of the wire and the air in the room.
Two very long concentric cylinders of diameters D1 = 0.35 m and D2 = 0.5 m are maintained at uniform temperatures of T1 = 950 K and T2 = 500 K and have emissivities «1 = 1 and «2 = 0.55, respectively. Determine the net rate of radiation heat transfer between the two cylinders per unit length of the cylinders.
The Earth intercepts 1.27 × 1017 W of radiant power from the Sun. Suppose the Earth, of volume 1.08 × 1021 m3, was composed of liquid water. How long would it take for the liquid water Earth at 0 ◦C to reach liquid water at 23.8 ◦C, if none of the power was radiated or reflected back out into space? Hint: There are 3.154 × 107 s in one year. The density of water is 10 × 103 kg/m3 and the specific heat of water is 4186 J/(kg K). a)113 years b)2.69 × 104 years c)1.13 × 105 years d)2.69 × 107 years e)26.9 years
A cylindrical surface of radius 15 cm and length 0.8 m maintained at a temperature of 140°C is continuously emitting radiations. If the emissivity of the surface is 0.93. (consider: Stefan's constant σ = 5.67 x 10-8 W/m2T4) Calculate the rate of heat energy radiated in Watts =