The correct answer is - 2. Earth's climates have changed and are likely to change in the future.
From what is known for the geologic past of the Earth, our planet's climate has been changing numerous times. The climate on the planet has varied from being predominantly wet tropical climate, to having ice ages, having multiple different climate types at the same time... The reasons for the changes in the Earth's climate are numerous, with the Sun's radiation, tectonic movements and activities, volcanic activity, outside influences like asteroid and meteorite collisions, the vegetation, and all of them have managed to create a very colorful climate history of the planet. This trend of climate change should continue in the future as well, as all of the aforementioned factors are still influencing the climate and on top of that the humans have become a factor in the climate change too.
Using Pythagorean's Theorem of a^2+b^2=c^2, with a and b being two legs and c being the hypotenuse.
You can find that the leg(15) squared is 225. The hypotenuse(17) squared is 289.
289-225=64
The square root of 64 is 8
So the missing leg of the triangle has a length of 8 units.
As I sat looking out at the city from Darling Harbour the other night, I noticed that nearly all the floors of the big office buildings had their lights ‘on’.
I compared the office buildings to large hotels and apartment buildings that had many of their lights ‘off’— obviously because people occupying those rooms and units turn the lights off when they’re not there. That makes absolute sense, doesn’t it? So why isn’t this same common sense not followed in office buildings?
I started doing some research online to find out. In this day and age when everyone is so conscious of the need to save energy in an effort to reduce carbon emissions, I thought surely there is a perfectly valuable and logical explanation to why all these lights are left ‘on’ at night.
To my surprise, this is what I found from various articles and blogs:
Office cleaning
Building security
Safety — so airplanes don’t hit the buildings
Surely cleaners don’t clean every floor at once all night long, not all lights need to be kept on for security reasons, and high-rise buildings have red blinking antennas on the roof to prevent planes from hitting them. These reasons weren’t convincing, so I dug a little deeper.
I found a study on overnight lighting in London’s non-domestic building stock by the Worcester Polytechnic Institute. Unfortunately, it explained that the data collected “did not provide reasons for overnight lighting”. However, the study did examine literature that suggests the following possible causes:
Diffusion of responsibility to others and authorities
People forget to turn lights off because they are stressed
Lack of motivation
Are diffusion of responsibility, forgetfulness due to stress and lack of motivation proper reasons for most city office buildings to be wasting so much energy every night?
If these truly are the reasons for leaving office building lights on, then the solution is simple ... let’s take responsibility and do something about it.
Take Action
You might work in one of those tall, bright buildings that shine at night. Why not take action and see if you can get the lights turned off on your floor or in the entire building. Here are some suggestions:
Talk to your manager, director, or CEO and ask them to encourage everyone to turn off the lights when they leave at the end of the day (as well as their computers and screens).
Talk to security and building services to ask if the security guards can turn any remaining lights off during their rounds once everyone is gone OR the office buildings could pay for someone to go through each floor turning off lights after everyone has left to eliminate the “I’m leaving them on for someone” excuse.
She wrong the rio grande is southwest
Answer:
What determines the air temperature of Christchurch, New Zealand? Compare the average annual temperature for each of the two cities shown on the map. Then Anchorage, Alanaka is cooler than Christ church.
Explanation:
Hope this helps :(
