Answer:
She did no work while she posed because she did not move the torch or the book.
Explanation:
*sorry I can't give a full explanation.*
g = 9.8 m/s²
w = m*g
Weight of cat: 55 N = m*9.8
m = 5.61 kg
Weight of dog: 110 N = m*9.8
m = 11.22 kg
There is gravitational potential energy (GPE) acting on the cat since it's at the very top.
GPE of cat = m*g*h = 5.61*9.8*2 = 109.96 J
GPE of dog = m*g*h = 11.22*9.8*0 = 0 J (it's 0 m height because it's on the floor instead of in the tree)
But, if the dog was also 2 m up in the tree, its GPE would be 219.91 J.
As you can see, it's GRAVITATIONAL potential energy is bigger than the cat because it weighs more. Generally, if you were just trying to find the force which is w = m*g (since weight is a force), you would see that the bigger the mass, the bigger the force, and gravity stays the same.
Hope this helped
Carbon dioxide is a gas having chemical formula
, a gas which exhaled by humans and inhaled by plants. It is also emitted from the sources such as cement production and combustion of fossil fuels. It is also known as greenhouse gas associated with acidification of ocean.
Carbon dioxide with other gases acts like a blanket of Earth which absorbs infrared radiations emitted from the sun and thus, preventing the escaping of these rays into the outer space which results in the gradual heating of Earth's surface and atmosphere i.e. increase in temperature of Earth. This process is known as Global Warming.
Hence, carbon dioxide is responsible for the increase in warming of the atmosphere i.e. option (D).