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just olya [345]
3 years ago
15

Why do you suppose that someone invented plastic

Biology
2 answers:
natka813 [3]3 years ago
8 0

Answer: Plastics could protect the natural world from the destructive forces of human need.

Explanation: Plastic allows us to keep water in a bottle like if your going to arizona and you are dying of thrist, then you'll have water in a bottle or as we call "A water bottle". Plastic bags were invented to save the planet, according to the son of Swedish engineer Sten Gustaf Thulin who created them in 1959. The bags were developed as an alternative to paper bags, which were considered bad for the environment because they resulted in forests being chopped down.

Rzqust [24]3 years ago
3 0

Answer:

Because they wanted something harder than paper/cardboard and softer than metal

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Use the transparency to describe a food chain that includes a mountain lion and a shrub
Rudiy27

Answer and Explanation:

We know that shrubs are primary producers and mountain lions are secondary or tertiary consumers. Therefore, mountain lion cannot directly feed on shrub rather need a herbivore. Therefore, to develop a food chain including mountain lion and shrub, we need to have at least one herbivore. If we add a deer between these two, the food chain willl be complete. The deer (herbivore) will eat shrub and mountain lion (carnivore) will eat deer. The food chain can be written as follows

<em>Shrub -> deer -> Mountain Lion</em>

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3 years ago
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4 years ago
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4 years ago
The volume of a certain gas is 29.3 liters at STP. What would be the volume of the same gas at 1.39 atmospheres and -23.00C? (R=
Andrew [12]

Answer:

19.32L

Explanation:

Given parameters:

Volume of the gas at STP = 29.3liters;

      Using this information first, let us find the number of moles of the gas.

                  Number of moles = \frac{volume of gas}{22.4}

With the number of moles, we can further solve this problem;

                 Number of moles  = \frac{29.3}{22.4}   = 1.31 moles

More parameters;

Pressure on gas  = 1.39atm

temperature  = -23°C  = -23 + 273  = 250K

Unknown:

Volume of gas  = ?

Solution:

The ideal gas equation is the perfect fix to solve this problem.

It is mathematically expressed as;

              Pv  = nRT

where P is the pressure

           v is the volume

           R is the gas constant

            n is the number of moles

            T is the temperature

     Input the parameters;

             1.39 x V  = 1.31 x 0.082 x 250

                     V  = 19.32L

7 0
3 years ago
Which substance is coded by a length of dna
Rudiy27

Answer: a specific protein

Explanation:

6 0
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