Answer:
Lithium
Explanation:
I believe it is Lithium. It can easily be cut with a knife and is the 3rd lightest non gas on the periodic table that is not a gas.
Answer:
The book sitting on the desk
Explanation:
The gravitational potential energy of an object is the energy possessed by the object due to its position relative to the ground.
It is calculated as:

where
m is the mass of the object
g is the acceleration due to gravity
h is the height of the object with respect to the ground
From the formula, we see that the GPE of an object is directly proportional to the heigth h: so, the higher the location of the object, the larger the GPE.
In this problem, we are comparing a book sitting on a desk and the same book sitting on the floor. In the two situations, the mass of the book is the same; however, in the first case, the value of the height is h, while in the second case, the value of h is lower (because the book is located at a lower height, being on the floor).
Therefore, we can conclude that the first book must have a larger GPE, since it has a larger value of h.
C. reducing the amount of garbage
Explanation:
The biggest long-term benefit of building a city's recycling building is that it helps to reduce that amount of garbage.
Recycling is simply the collection and processing of waste materials into new products that can be used again.
- Waste recycling helps to reduce that actual proportion and percentage of materials to be considered waste.
- The overall long term goal of any recycling procedure is to reduce the amount of garbage in the environment.
learn more:
Untreated wastes brainly.com/question/4080706
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We should indicate first and foremost the assumption of ideal gas behavior so that we can use the ideal gas equation written below:
PV = nRT
For this problem,let's solve for V. Rearranging the equation,
V = nRT/P
Substituting the values,
V = (1 mol)(0.0821 L-atm/mol-K)(30 + 273 K)/1.2 atm
<em>V = 20.73 L of N₂ gas</em>