Physics, 22.10.2020 19:01 dtilton2003

Monochromatic electromagnetic radiation illuminates an area of a surface. The electric and magnetic fields of the waves are then doubled in magnitude. How is the total energy incident on the surface per unit time affected by this increase in the electric and magnetic fields

Answers: 2

Show answers

Answers

Answer from: hernandez09297

Complete Question

Monochromatic electromagnetic radiation illuminates an area of a surface. The electric and magnetic fields of the waves are then doubled in magnitude. How is the total energy incident on the surface per unit time affected by this increase in the electric and magnetic fields?

(a) The total energy is not affected by this change.

(b) The total energy will increase by a factor of two.

(d) The total energy will decrease by a factor of two.

(e) The total energy will decrease by a factor of four.

Explanation:

Generally the total energy is directly proportional to the square of the amplitude of the (electric and magnetic field of the wave ) , this can be mathematically represented as

$E \ \ \alpha \ \ A^2$ \

=> E = k A^2

Here k is a constant

=> $k = \frac{E}{A^2}$

=> $\frac{E_1}{A_1^2} = \frac{E_2}{A_2^2}$

Now when the amplitude of( electric and magnetic fields) are doubled, i.e when A_2 = 2A_1

$\frac{E_1}{A_1^2} = \frac{E_2}{(2A_1)^2}$

=> $\frac{E_1}{A_1^2} = \frac{E_2}{ 4 A_1^2}$

=> E_2 = 4 E_1

So we see that the total energy increase by

Answer from: Quest

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation:

Answer from: Quest

so here is the information for current research:

-nrel's geothermal analysts, scientists, and engineers perform a full range of research from developing advanced methods of locating and accessing geothermal resources to exploring innovative technologies to extract and produce clean energy from the heat of the earth

and here is the information for the technology of geothermal energy:

-it's clean and sustainable

-resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma

-almost everywhere, the shallow ground or upper 10 feet of the earth's surface maintains a nearly constant temperature between 50° and 60°f (10° and 16°c)

-geothermal heat pumps can tap into this resource to heat and cool buildings

-a geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building

-in the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery system

-in the summer, the process is reversed, and the heat pump moves heat from the indoor air into the heat exchanger

-the heat removed from the indoor air during the summer can also be used to provide a free source of hot water

Another question on Physics

Physics, 21.06.2019 20:00

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

Answers: 1

Answer

Physics, 22.06.2019 02:20

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Answers: 1

Answer

Physics, 22.06.2019 06:20

Clothing made of several thin layers of fabric with trapped air in between, often called ski clothing, is commonly used in cold climates because it is light, fashionable, and a very effective thermal insulator. so it is no surprise that such clothing has largely replaced thickand heavy old-fashioned coats. (a) consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 w/m·°c) with 1.5-mm-thick air space (k = 0.026 w/m·°c) between the layers. assuming the inner surface temperature of the jacket to be 28°c and the surface area to be 1.25 m2, determine the rate of heat loss through the jacket when the temperature of the outdoors is 0°c and the heat transfer coefficient at the outer surface is 25 w/m2·°c. (b) what would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic fabric? what should be the thickness of a wool fabric (k = 0.035 w/m·°c) if the person is to achieve the same level of thermal comfort wearing a thick wool coat instead of a five-layer ski jacket?

Answers: 1

Answer

Physics, 22.06.2019 07:30

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

Answers: 1

Answer

You know the right answer?

Monochromatic electromagnetic radiation illuminates an area of a surface. The electric and magnetic...

Questions