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dusya [7]
4 years ago
7

Why did the United States government set aside land for the first national parks?

Chemistry
1 answer:
Elan Coil [88]4 years ago
3 0
B) They worries people would destroy the animals and land.
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One mole of ar initially at 305 k undergoes an adiabatic expansion against a pressure pexternal = 0 from a volume of 8.5 l to a
PilotLPTM [1.2K]
An adiabatic process is when the system is insulated that no heat is released to the surroundings. For this type of process, we have a derived formula written below:

(T₂/T₁)^C = (V₁/V₂)
where C = Cv/nR

From the complete problem shown in the attached picture, Cv = (3/2)R. Thus,
C= (3/2)/1 mol = 3/2

(T₂/305 K)^(3/2) = (8.5 L/82 L)
Solving for T₂,
<em>T₂ = 67.3 K</em>

3 0
3 years ago
Calculate the nuclear binding energy for 5525mn in megaelectronvolts per nucleon (mev/nucleon).
r-ruslan [8.4K]

To solve this question, let us first calculate how much all the nucleons will weigh when they are apart, that is: 
<span>Mass of 25 protons = 25(1.0073) = 25.1825 amu </span>

Mass of neutrons = (55-25)(1.0087) = 30.261 amu 

So, total mass of nucleons = 30.261+25.1825 = 55.4435 amu 

<span>Now we subtract the mass of nucleons and mass of the Mn nucleus:
55.4435 - 54.938 = 0.5055 amu 

This difference in mass is what we call as the mass defect of a nucleus. Now we calculate the binding energy using the formula:</span>

<span> E=mc^2 </span>

<span>But first convert mass defect in units of SI (kg):
Δm = 0.5055 amu = (0.5055) / (6.022x10^26) 
<span>Δm = 8.3942x10^-28 kg</span>

Now applying the formula, 
E=Δm c^2 
E=(8.3942x10^-28)(3x10^8)^2 
E=7.55x10^-11 J</span>

 

Convert energy from Joules to mev then divide by total number of nucleons (55):

E = 7.55x10^-11 J * (6.242x10^12 mev / 1 J) / 55 nucleons

<span>E = 8.57 mev / nucleon</span>

8 0
3 years ago
Convert 6.86 km into m​
Elan Coil [88]

Answer:

The answer is 6860 meters

Explanation:

by multiplying the length value by 1000

hope it helps

good day

thank u(◕ᴗ◕✿)

8 0
3 years ago
Read 2 more answers
Charles Darwin's theory of evolution describes how species evolve due to natural selection. Which of these is NOT evidence of na
STALIN [3.7K]

Answer:

b

Explanation:

mint plant varieties are crossed to express desirable traits

7 0
3 years ago
What is the symbol for the second most common element in the universe?
insens350 [35]
I guess it is A and i think i m correct
3 0
4 years ago
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