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Fittoniya [83]
3 years ago
12

What was the near extinction of many birds was caused by

Physics
1 answer:
Nat2105 [25]3 years ago
5 0
I believe the use of DDT
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The angle of elevation to the top of the building at a distance of 50.0 m from its base is 60.0 degrees. find the height of the
Masteriza [31]

Answer:

86.6 meters

Explanation:

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3 years ago
Write a five paragraph essay discussing the creation of the National Aeronautics and Space Administration, NASA. Compare it to o
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it was made in July 29, 1958, United States

it was founded by

Dwight D. Eisenhower

The first rocket which could fly high enough to get into space was the V2 missile which was first launched by Germany in 1942. The first rocket which actually launched something into space was used to launch Sputnik, the first satellite, on October 4, 1957. The rocket that launched Sputnik was a R-7 ICBM rocket.

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4 years ago
The average distance between collisions for atoms in a real gas is known as the mean free path (see pp. 298-9 in McKay). Which o
dusya [7]

Answer:

300 nm

Explanation:

R = Gas constant = 8.314 J/molK

r = Atomic radii = 1\times 10^{-10}\ m

d = Atomic diameter = 2r=2\times 10^{-10}\ m

At STP

T = Temperature = 273.15 K

P = Pressure = 100 kPa

N_A = Avogadro's number = 6.022\times 10^{23}

The mean free path is given by

\lambda=\frac{RT}{\sqrt2d^2N_AP}\\\Rightarrow \lambda=\frac{8.314\times 273.15}{\sqrt2 \pi \times (2\times 10^{-10})^2\times 6.022\times 10^{23}\times 100000}\\\Rightarrow \lambda=2.12165\times 10^{-7}\ m=212.165\times 10^{-9}\ m=212.165\ nm

The answer that best represents the mean free path for gas molecules is 300 nm

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3 years ago
Genetic variations in a population are caused by random what?
nikitadnepr [17]

Answer:

Explanation:Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

8 0
4 years ago
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GUESS WHAT??? I'LL MAKE YOU BRAINLIEST!!! HURRY AND ANSWER THIS!!!
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Your answer is B

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