Answer:
60/120 = 50%
Final answer:
The efficiency of a light bulb is the ratio of luminous flux in lumens to electric power consumed in watts, which is known as luminous efficacy. It's essential for comparing light bulbs' energy efficiency, but factors like lifespan and cost are also important.
Explanation:
The efficiency of a light bulb can be written as the ratio of luminous flux to electric power consumed. Luminous flux is the measure of the perceived power of light, and it is quantified in lumens (lm), while the electric power consumed by the bulb is measured in watts (W). To determine the efficiency, we take the number of lumens a bulb produces and divide it by the number of watts it uses. This efficiency, known as luminous efficacy, is critical for understanding the energy efficiency of different lighting technologies, such as incandescent bulbs, compact fluorescent lamps (CFL), and LED bulbs.
For instance, a 60-W incandescent bulb may produce the same lumens as a 15-W LED, but the LED is more efficient because it uses less power for the same light output. When comparing bulbs, especially for energy saving and cost effectiveness, it's essential to look at lumens rather than watts. Notably, because of other factors, the efficiency should not be the sole consideration; the bulb's lifespan and cost should also be taken into account.
How is acid rain created over use of fossil fuels climate change chemical spills
Answer:
Fossil Fuels
Explanation:
For example, SO2 is created as a result of activities that burn fossil fuels, and NO2 is a byproduct of fertilizers.
The following map displays the population destiny a regions throughout China. According to the map which of the following regions is one of the least densely populated?
A. Hunan
B. Taiwan
C. Tibet
D. Shanghai
Tibet is one of the least densely populated regions in China.
Explanation:
China is one of the biggest countries in the world, and it is also the most populated country in the world. Despite having more than 1.3 billion people, China's population tends to be concentrated in certain parts of the country, while others have very low population density. In general, the eastern parts of the country tend to be the most populated, while the northern and western tend to be the least populated.
Some of the least populated regions in China are:
TibetXinjiangQinghaiInner MongoliaTibet is one of the four regions in China that has population density of below 50 people per square km. The basic reason for this is the geography of this region. It is a very high region, connected with the Himalayas, with very little arable land, and very harsh climate. Naturally, the people have avoided this region, as apart from having harsh conditions, it is also not a region that can support large population.
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Who were Orville and Wilbur Wright
Answer: The Wright brothers – Orville (August 19, 1871 – January 30, 1948) and Wilbur (April 16, 1867 – May 30, 1912) – were two American aviation pioneers generally credited with inventing, building, and flying the world's first successful airplane.
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Orville and Wilbur Wright are the pioneers of powered flight, achieving the first successful flight in 1903. They innovated aircraft control and wing design through extensive experimentation at Kitty Hawk, North Carolina. Their work established the foundation for modern aviation and had significant implications for warfare.
Orville and Wilbur Wright, also known as the Wright brothers, were American pioneers of aviation who achieved the first successful powered flight in 1903. With no formal education in engineering or science, they used their mechanical experience from running a bicycle shop to apply the scientific method to their aeronautical experiments. At Kitty Hawk, North Carolina, they developed a new method of controlling an aircraft through a system of ropes and pulleys that connected the rudder to twisting wing tips. This breakthrough in control, along with their discovery that long, narrow wings provided more lift, was crucial in building their powered aircraft.
Despite facing competition from other aviators like Glenn Curtiss, the Wright brothers secured their place in history as the first to build and fly a heavier-than-air airplane. Their dedication to aeronautical progress led to a patent for their three-axis method of control and ultimately revolutionized the way we think about air travel. Although initially hopeful that their invention would discourage warfare, Orville Wright reflected on the military use of airplanes in WWI, realizing their technology also had the potential to change the dynamics of war.
What physical features have acted as barriers to settlement in the US and Canada?
Describe two disadvantages to human health of an exclusively plant-based diet?
Answer:
Protein requirements are not met
Iron, calcium, and B12 nutrient levels difficult to maintain and these deficiencies are common
Explanation:
8. Scientists recently discovered that the universe
g. has started to contract in size.
h. is expanding even faster than before.
i. is no longer expanding or contracting.
j. will soon go through another big bang
Answer:
is expanding more and more
What type of agricultural practices are used in syria and how does climate affect it?
Answer:
Agricultural Practices: Pumping from rivers and flood irrigation.
How the climate affects it: During summer, the climate is dry and hot. During the winter, it's cold. Therefore, the rivers could freeze, or evaporate
Explanation:
Agricultural Practices: In Syria, the main system of irrigation is pumping from rivers and flood irrigation. In these areas, several irrigated crops are cultivated, such as the strategic crops of cotton, wheat and sugar beet. The fruit trees and early vegetables are also planted as in the Syrian coast.
How the climate affects it: The climate in Syria is dry and hot in summer and cold in winter. ... The average maximum summer temperatures in inland areas vary between 33°C and 40°C, with peaks that sometimes exceed 45°C, while the average minimum winter temperatures are around 0°C.
Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is placed. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers.
Match the X's on the map with the correct climate zones below. Click on the name of a climate zone. Click again on the X corresponding to its correct location.
The question asks to match climate zones to their correct locations on a map. If unsure or wrong, answers can be cleared by dragging to a trashcan icon and clicking it.
Explanation:The core task of this question is a geography-based interactive activity where you are asked to match different climate zones to their corresponding locations on a map. These climate zones are likely labeled with 'X' marks on the map. To successfully complete this task, you need to click on a climate zone name and then click on the corresponding 'X' that matches the location of that climate zone on the map. If you are unsure or need to change your answer, you can drag the item to a trashcan icon, and click on the trashcan to clear all your answers.
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What is one way in which Earth is affected by the moon? (5 points)
Answer:
Tides
Explanation:
The moon affects the tides. The moons gravity is connected to Earth, and since the oceans cover most of Earth, the moon's gravity creates low and high tides.
7. Why might it be more
accurate to calculate using only
arable land?
Answer:
It would be more accurate to calculate using only the arable land because only the arable can be surely said to be suitable for the cultivation of crops.
Explanation:
It is preferable to calculate the amount of agricultural yield that can be obtained from a specific area by taking into consideration only the land that is arable because the land other than arable land cannot guarantee the expected produce as it is not deemed to be suitable for farming. Arable land guarantees the expected produce owing to the fertility of the soil and the nutrients present in it that are crucial for the crop to thrive.How do levels of industrial smog compare in developing nations with levels in developed
nations? Explain.
Explanation:
Developing nations have a higher level of industrial fog than developed nations. This is because the nations are developing rapidly and at higher rates than the developed nation, Therefore they consume a lot of energy to spur this economic development. However, due to their need for cheap energy to power this rapid industrial development, they opt for cheap nonrenewable sources of energy like coal which are the highest populations. This is why cities in countries like India and China have the highest levels of smog.
Most developed nations, on the other hand, are shifting towards renewable energy sources –even though they are currently more expensive than non-renewable energy- because they have the resources.
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Levels of industrial smog are generally higher in developing nations compared to developed nations due to differences in industrial regulations and pollution control measures.
In developing nations, rapid industrialization, lax environmental regulations, and the use of outdated technologies contribute to higher levels of industrial smog. These countries often prioritize economic growth over environmental protection, leading to significant air pollution problems.
Developing nations may rely heavily on coal and other fossil fuels.Lack of stringent emission standards exacerbates the smog problem.Urbanization and increased vehicle emissions further contribute to poor air quality.In contrast, developed nations have implemented stricter environmental regulations and advanced technologies to reduce industrial emissions. These measures, combined with a greater focus on sustainable practices, have significantly lowered industrial smog levels in these countries.
If the sun is directly over your head at noon and nothing is really casting any shadows,
where are you and what day could it be?
South pole, December 21
North pole, December 21
Equator, March 20
Equator, June 21
Answer:
December 15
Explanation:
Cold
Trenches form at sites where _____.
What is the volume of a rectangular prism that has a height of 3 inches and a base of 14 square inches?
Answer: [tex]42 in^{3}[/tex]
Explanation:
The volume of a rectangular prism is given by the multiplication of its three dimensions: length, width and height.
[tex]V=(length)(width)(height)[/tex] (1)
This also can be seen as the multiplication of the area of one of its faces (length times width, for example) and its height. In fact, this is the case here.
We are given the area of the base of the rectangular prism:
[tex]A=(length)(width)=14 in^{2}[/tex] (2)
And the value of its height:
[tex]h=3 in[/tex] (3)
Hence, the volume of this prism is:
[tex]V=(A)(h)[/tex] (4)
[tex]V=(14 in^{2})(3 in)[/tex] (5)
Then:
[tex]V=42 in^{3}[/tex] This is the volume of the rectangular prism
If basalt is mafic, then what is granite?
Which are causes of mechanical weathering
Answer:
The answer is plant growth, animal actions, and pressure release.
Explanation:
I just took a quiz with this question and I got it correct.
Which country is labeled with the number 3 on the map above?
A Brazil
B. Mexico
Colombia
D. Argentina
Answer:
(A) Brazil
Explanation:
Answer:
The answer is A
Explanation:
The Zambezi River is a major source of hydroelectric power in South Africa.
True or False
Answer: The following statement is true!
good luck lovebug!
Which of the following is a reason that
exfoliation of granite occurs?
upward expansion
be abrasion
C oxidation
d. hydrolysis
Answer:
Upward Expansión is the correcto answer
Why is Climate important to life on Earth?
Answer:
Climate can be thought of as the average or typical weather conditions we experience. Scientists know that climate varies naturally on many timescales and they know that people are affecting climate - particularly through emissions of greenhouse gases.
Of the cities shown, which one is the most visited?
Bangkok is the most visited cities in the world.
Explanation:
Bangkok tops the most visited cities in the world where about 20 million people visit this country every year.
This is based on the visits of the people, who spend at least a night in Bangkok and spend money there.
Hence Option C, that is Bangkok is the most visited cities according to the reports.
Followed by Bangkok, London is the second in the list where 19.8 visitors are registered per year.
A market structure with a large number of sellers who make differentiated products is called
oligopoly
monopolistic competition
Operfect competition
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A market structure with a large number of sellers who make differentiated products is called monopolistic competition.
Explanation:
When there are many products that are similar and homogeneous are produced by many number of companies, then this refers to the market structure. There are may types of market structure such as Monopoly,oligopoly,duopoly,Monopsony, Oligopsony,Perfect competition and Monopolistic competition.
Monoplistic competition can also be termed as competitive market. It refers to the structure of the market in which there will be many number of companies and they will be producing products with slight differentiation. Thus,it is known as competitive market.
Imagine that you live in Colorado. Currently there is a low-pressure area over Colorado. If a high-pressure area moves in, how will the direction of the wind change?
plz help
Answer:
The wind would change from east to west to north to south
Explanation:
2 Points
What makes a source credible apex
A source is said to be credible when it is reliable consistently.
Explanation:
A source becomes credible when the source is reliable constantly , which means it is providing correct information constantly . When the information provided becomes true a trust factor starts working for that source and the receiver starts believing the information provided in that source.
In case of academic writing a source is said to be credible when it is providing unbiased information and along with proper evidence. While writing a research paper we always depend upon a credible source.
A source is considered credible when it is primarily fact-based, objective, and supported by evidence. The presence of a large number of advertisements may negatively impact source credibility. Expertise confirmation and aim transparency of the information provider also contribute to establishing credibility.
Explanation:What makes a source credible is determined by its reliability, accuracy, and trustworthiness. A credible source provides information that is fact-based, objective, and corroborated by evidence. When a source is primarily fact-based, it's more likely to be credible as it presents verifiable information rather than opinions or speculations. Judging well the credibility of sources ensures the use of reputable, trustworthy evidence in research or argumentation.
However, if a source is opinion-based, it can significantly impact the view on its credibility since it may introduce bias and subjective viewpoints. Therefore, it is necessary to consider whether the source primarily presents facts or opinions. In assessing a source's credibility, one should also consider the influence of advertising. A large number of advertisements or certain types of advertising can affect the credibility of the source by suggesting potential bias or a commercial agenda.
For guidance on credible websites, verification from instructors, librarians, or other authoritative sources is important. Recognizing signs of expertise and understanding the background and aims of the information provider enhances the ability to determine credibility. Uncovering and verifying the original sources is a critical step in solidifying the credibility of the information presented in shorter newspaper articles or credible websites.
Using Credible Sources is an essential aspect of scholarly work and is integral to presenting convincing arguments and research. Tiered approaches to establishing credibility, such as tracing back to original texts and verifying the expertise of the authors, are strategies that should be employed.
Identify two ways to reduce wind erosion and how do they work? Please write in complete sentences with correct capitalization, grammar, spelling and punctuation
Answer:
Two ways to reduce wind erosion are: Covering the Surface of the Soil and Making use of Shelterbelts.
Explanation:
Wind erosion is a natural activity where a soil is moved from one place to another mainly because of the wind power. If so happens that a strong blow of wind comes and takes away with it the volume of soil particles and transfers it to other place creating dust storms.
Wind erosion can be reduced by Covering the Surface of the Soil. This can be done by growing vegetation which will protect the soil by the keeping the wind off the soil surface. Another way to reduce wind erosion is by making use of Field Shelterbelts. Shelterbelts are the best way because it not only reduce the wind erosion but at the same time it also conserve the soil moisture. Shelterbelts is a planting method where fields are planted in rows of varied crops.
To reduce wind erosion, cover soil with vegetation, which stabilizes and helps retain moisture. Planting rows of trees as windbreaks can also slow wind and protect soil.
Two ways to reduce wind erosion include using vegetation and creating windbreaks. Covering soil with plants is a highly effective method because plants and their roots stabilize the soil, making it more difficult for particles to be swept away by the wind. Additionally, vegetation increases the soil's water retention, contributing to its resistance against wind erosion.
Planting rows of trees, known as windbreaks or shelterbelts, around fields is another method to reduce wind erosion. The trees act as a barrier, slowing the wind before it passes over the fields. Slower wind speeds result in less soil being detached and transported away. This protection is maximized when windbreaks are oriented perpendicular to the prevailing winds.
Describe the relationship between the level of service and the price of a hotel room?
Answer:
The role of pricing on customer satisfaction has been largely ignored, however hospitality services are, for the most part produced by humans, and consequently, no two guest stays will be precisely alike.
However researches have been carried out suggesting that the variability in performance across different consumption experiences leads to increased uncertainty, and thus to decreased reliance on prior expectations, in such situation consumers tend to use price as a cue of performance expectations. Which makes it difficult to know customer satisfaction.
Meaning the relationship between the level of service and the price of hotel room is uncertain because know two human is alike.
Explanation:
The level of service and the price of a hotel room are directly related. Higher levels of service often mean higher prices, as the cost of providing these services is incorporated into the room price.
Explanation:In general, the level of service and the price of a hotel room are directly proportional. This means that as the level of service increases, so does the price of the hotel room. For instance, a five-star hotel that provides high-end services such as 24-hour concierge, room service, and personal butlers will charge more for their rooms compared to a three-star hotel offering basic services like cleaning and breakfast. This is because the cost to provide these additional services is factored into the price of the room.
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Which could be the location where water emerges from the surface as a spring?
A. 1
B. 2
C. 3
D. 4
Based on the information provided in the image, the most likely location where water emerges from the surface as a spring is C.
Here's why:
Springs typically occur where the water table meets the ground surface. In the image, the water table is represented by the blue line. We can see that the water table intersects the ground surface at location C.
Springs are also often found at the base of hills or slopes. This is because the water table is usually higher in these areas. In the image, location C is at the base of the slope.
Locations A, B, and D are all uphill from location C. This means that the water table is lower in these locations, and it is less likely that a spring would form there.
Therefore, based on the principles of hydrology and the information provided in the image, location C is the most likely spot for a spring to emerge.
According to the principles of hydrology and the information provided in the image, location C is the most likely spot for a spring to emerge.
Springs typically occur where the water table meets the ground surface.
In the image, the water table is represented by the blue line.
We can see that the water table intersects the ground surface at location C.
Springs are also often found at the base of hills or slopes.
This is because the water table is usually higher in these areas.
In the image, location C is at the base of the slope.
Locations A, B, and D are all uphill from location C.
This means that the water table is lower in these locations, and it is less likely that a spring would form there.
Therefore, According to the principles of hydrology and the information provided in the image, location C is the most likely spot for a spring to emerge.
Explain how the parts of a hard-boiled egg, including the shell, correspond roughly to earth's layers.
The inside of the earth is layered something like an egg. Both have a thin, brittle shell. The crust of the earth is broken into pieces, like the cracked shell of a hardboiled egg. The mantle of the earth is like the egg white, and the core of the earth lies in the center, like the egg yolk.
Read lines 10 - 13 of the poem "Your Laughter" and answer the question.
My struggle is harsh and I come back
with eyes tired
at times from having seen
the unchanging earth,
YOUR LAUGHTER from The Captain's Verses by Pablo Neruda, copyright © 1972 by Pablo Neruda and Donald D. Walsh. Reprinted by permission of New Directions Publishing Corp.
In these lines, the underlined words describe _____.
glimpses of neighborhood gardens
a disconnection from nature
frustrations with work
a monotonous daily routine
Movement occurs along fractures in rocks when _____.
stress equals the strength of the rocks involved
stress is applied to the rocks involved
stress overcomes the strength of the rocks involved
stress is less than the rocks involved
Movement occurs along fractures in rocks when stress overcomes the strength of the rocks involved.
Explanation:
The fracture that occurs in rocks is called a fault. The movement is due to more stress on the rocks that are of lesser strength.
Rocks are elastic in nature. Faults occur because of stress that builds up, causing deformations. When stress increases eventually, it overcomes the strength of the rocks and energy releases, resulting in earthquakes.
Tsunami occurs in oceans when rock bed shift underneath, causing huge waves.
Due to sudden breaks on the rocks under the earth, an explosion occurs that produces energy waves called the Seismic waves.