For an opaque object, its emissivity (ε, radiation from a warm object) is inversely related to...
- For an opaque object, its emissivity (ε, radiation from a warm object) is inversely related to its reflectivity. How would the radiated light from an opaque object (such as the earth), with an emissivity of 1 (complete absorption of light), compare with an opaque object (such as the earth), with a very low emissivity (such as 0.1, and nearly complete reflection)?
Homework Answers
Add Answer to:
For an opaque object, its emissivity (ε, radiation from a warm
object) is inversely related to...
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature...
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature of the Earth is affected by the greenhouse effect of the atmosphere. This phenomenon describes the ef- fect of absorption of infrared light emitted by the surface so as to make the surface temperature of the Earth higher than if it were airless. For comparison, consider a spherical object of radius r with no atmosphere at the same distance from the Sun as the...
The weight (in pounds) w t(d) of an object varies inversely as the square of its distance (in thousands of miles) d from the center of Earth a. An astronaut weighs 180 pounds at sea level (about...
The weight (in pounds) w t(d) of an object varies inversely as the square of its distance (in thousands of miles) d from the center of Earth a. An astronaut weighs 180 pounds at sea level (about 4 thousand miles from Earth's center) Find an equation off b. How much would the astronaut weigh at 4 thousand miles above Earth's surface? pounds c. At what distance from the center of Earth would the astronaut weigh 1 pound? miles (Round to...
The rate of heat transfer by emitted radiation is determined by the Stefan-Boltzmann law of radiation...
The rate of heat transfer by emitted radiation is determined by the Stefan-Boltzmann law of radiation = ceAT4 t where a 5.67x108 J/(s m2. K4) is the Stefan-Boltzmann constant, A is the surface area of the object, and T is its absolute temperature in kelvin. The symbol e stands for the emissivity of the object, which is a measure of how well it radiates. An ideal jet-black (or black body) radiator has e 1, whereas a perfect reflector has e...
(33%) Problem 3: Warm blooded animals are home otherm that is, they maintain an approximately constant...
(33%) Problem 3: Warm blooded animals are home otherm that is, they maintain an approximately constant body temperature. (For humans it's about 37°C.) When they are in an environment that is below their optimum temperature, they use energy derived from chemical reactions within their bodies to warm them up One of the ways that animals lose energy to their environment is through radiation. Every object emits electromagnetic radiation that depends on its temperature. For very hot objects like the sun,...
Part C: Case Study [Adapted from Lecture-Tutorials for Introductory Astronomy, 1st Ed., Adams, Prather, Slater (Pearson...
Part C: Case Study [Adapted from Lecture-Tutorials for Introductory Astronomy, 1st Ed., Adams, Prather, Slater (Pearson Prentice Hall, 2005) The amount of energy (sunlight) absorbed by Earth from the Sun is equal to the amount of energy given off by Earth. Radiation given off by Earth Energy given to Earth from Sun S N Question 10 (1 point) What would happen if the Earth radiated less energy than it took in from the Sun? The Earth's temperature would increase The...
(33%) Problem 3: Warm blooded animals are homeothermic that is, they maintain an approximately constant body...
(33%) Problem 3: Warm blooded animals are homeothermic that is, they maintain an approximately constant body temperature. (For humans it's about 37°C.) When they are in an environment that is below their optimum temperature, they use energy derived from chemical reactions within their bodies to warm them up. One of the ways that animals lose energy to their environment is through radiation. Every object emits electromagnetic radiation that depends on its temperature. For very hot objects like the sun, that...
corrective Lenses (@) Spectacles are often coated to reduce reflection. The plastic of the lens has...
corrective Lenses
(@) Spectacles are often coated to reduce reflection. The plastic of the lens has a very thin coating of some other material with different refractive index (as shown in the figure). 11 T2 Air ni Coating TLV n2 Lens n3 Figure - cross section showing three parallel layers of material (air, coating and the lens), with a light ray incident on the coating. The ray is partially reflected at the air/coating interface; the reflected ray Ti is shown....
In Example 34.6, we imagined equipping 1950DA, an asteroid on a collision course with the Earth, with a solar sail in hopes of ejecting it from the solar system. We found that the enormous size required for the solar sail makes the plan impossible at this
In Example 34.6, we imagined equipping 1950DA, an asteroid on a collision course with the Earth, with a solar sail in hopes of ejecting it from the solar system. We found that the enormous size required for the solar sail makes the plan impossible at this time. Of course, there is no need to eject such an object from the solar system; we only need to change the orbit. A much more pressing problem is Apophis, a 300-m asteroid that may be...
Gamma-rays (Y-rays) are highly energetic electromagnetic radiation that are emitted when the nuclei undergo transitions in...
Gamma-rays (Y-rays) are highly energetic electromagnetic radiation that are emitted when the nuclei undergo transitions in the energy levels. The energy of the y-rays is upward of 100 keV. Due to the high energy, the rays are not appreciably absorbed by even several centimeters of materials such as concrete or wood. However, dense metals such lead, are effective Y-ray absorbers. The amount y-rays that are absorbed depends on the material and the energy of the gamma-rays, the higher the energy,...
Please answer question i thank you! h) (4 pts) Ebonite, from which bowling balls are made...
Please answer question i
thank you!
h) (4 pts) Ebonite, from which bowling balls are made is one of the most triboelectrically active substances. The precise mechanism for the triboclectric effect is still very much a scientific mystery. The surface of bonite will quickly pickup excess electrons as it moves through air. Moving charges comprise an electric current Oscillating electric currents generate radio waves. If the muss used in this question is ebonite, its oscillations will generate radio waves that...
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature of the Earth is affected by the greenhouse effect of the atmosphere. This phenomenon describes the ef- fect of absorption of infrared light emitted by the surface so as to make the surface temperature of the Earth higher than if it were airless. For comparison, consider a spherical object of radius r with no atmosphere at the same distance from the Sun as the...
The weight (in pounds) w t(d) of an object varies inversely as the square of its distance (in thousands of miles) d from the center of Earth a. An astronaut weighs 180 pounds at sea level (about 4 thousand miles from Earth's center) Find an equation off b. How much would the astronaut weigh at 4 thousand miles above Earth's surface? pounds c. At what distance from the center of Earth would the astronaut weigh 1 pound? miles (Round to...
The rate of heat transfer by emitted radiation is determined by the Stefan-Boltzmann law of radiation = ceAT4 t where a 5.67x108 J/(s m2. K4) is the Stefan-Boltzmann constant, A is the surface area of the object, and T is its absolute temperature in kelvin. The symbol e stands for the emissivity of the object, which is a measure of how well it radiates. An ideal jet-black (or black body) radiator has e 1, whereas a perfect reflector has e...
(33%) Problem 3: Warm blooded animals are home otherm that is, they maintain an approximately constant body temperature. (For humans it's about 37°C.) When they are in an environment that is below their optimum temperature, they use energy derived from chemical reactions within their bodies to warm them up One of the ways that animals lose energy to their environment is through radiation. Every object emits electromagnetic radiation that depends on its temperature. For very hot objects like the sun,...
Part C: Case Study [Adapted from Lecture-Tutorials for Introductory Astronomy, 1st Ed., Adams, Prather, Slater (Pearson Prentice Hall, 2005) The amount of energy (sunlight) absorbed by Earth from the Sun is equal to the amount of energy given off by Earth. Radiation given off by Earth Energy given to Earth from Sun S N Question 10 (1 point) What would happen if the Earth radiated less energy than it took in from the Sun? The Earth's temperature would increase The...
(33%) Problem 3: Warm blooded animals are homeothermic that is, they maintain an approximately constant body temperature. (For humans it's about 37°C.) When they are in an environment that is below their optimum temperature, they use energy derived from chemical reactions within their bodies to warm them up. One of the ways that animals lose energy to their environment is through radiation. Every object emits electromagnetic radiation that depends on its temperature. For very hot objects like the sun, that...
corrective Lenses
(@) Spectacles are often coated to reduce reflection. The plastic of the lens has a very thin coating of some other material with different refractive index (as shown in the figure). 11 T2 Air ni Coating TLV n2 Lens n3 Figure - cross section showing three parallel layers of material (air, coating and the lens), with a light ray incident on the coating. The ray is partially reflected at the air/coating interface; the reflected ray Ti is shown....
Gamma-rays (Y-rays) are highly energetic electromagnetic radiation that are emitted when the nuclei undergo transitions in the energy levels. The energy of the y-rays is upward of 100 keV. Due to the high energy, the rays are not appreciably absorbed by even several centimeters of materials such as concrete or wood. However, dense metals such lead, are effective Y-ray absorbers. The amount y-rays that are absorbed depends on the material and the energy of the gamma-rays, the higher the energy,...
Please answer question i
thank you!
h) (4 pts) Ebonite, from which bowling balls are made is one of the most triboelectrically active substances. The precise mechanism for the triboclectric effect is still very much a scientific mystery. The surface of bonite will quickly pickup excess electrons as it moves through air. Moving charges comprise an electric current Oscillating electric currents generate radio waves. If the muss used in this question is ebonite, its oscillations will generate radio waves that...
Most questions answered within 3 hours.
-
1- What is the freezing point of pure water (in degrees
Celsius)?
2-
he molar mass...
asked 18 minutes ago -
Determine the direction of the force that will act on the charge
in each of the...
asked 24 minutes ago -
You purchase your daily coffee at the Chemist’s Coffeehouse and
have a choice of two cups:...
asked 3 hours ago -
Which of the following pairs of chemicals could be used to make
a buffer solution?
A.)...
asked 2 hours ago -
Problem 16-51 Sales
Activity Variance (LO 16-3)Odessa, Inc., reports the following
information concerning operations for the...
asked 3 hours ago -
Pictured on the right are thee point charges Q1 = 18.4 μC, Q2 =
-30.6 μC,...
asked 3 hours ago -
A graduate student is conducting research in psychology and
needs to obtain the IQ scores of...
asked 4 hours ago -
R2.84: There are 2 defective products in a production lot of 10.
An inspector randomly selected...
asked 5 hours ago -
Consider the following equilibrium system: COCl2(g) CO(g) +
Cl2(g) A 10.00 L evacuated flask is filled...
asked 5 hours ago -
1) What are the two distinct steps that one needs to perform
when developing a data...
asked 6 hours ago -
2) Write a C++ program that uses a class called “Degree” to
obtain the trigonometric
values...
asked 7 hours ago -
1. In eukaryotic cells the genomes of
&
asked 7 hours ago