Answer:
scientists often communicate their research results in three general ways:
1) One is to publish their results in peer-reviewed journals that can be ready by other scientists.
2) Two is to present their results at national and international conferences where other scientists can listen to presentations
Explanation:
Answer:
V = 1.35 m/s
Explanation:
Given that,
Mass of a railroad car, m₁ = 25,000 kg
Initial speed of a railroad car, u₁ = 4.5 m/s
Initial speed of railroad car that is full of coal, u₂ = 0 (at rest)
We need to find the final velocity of the two railroad cars if they move as one after the collision. It is a case of inelastic collision in which the momentum remains conserved. Using the conservation of linear momentum as follows :
![m_1u_1+m_2u_2=(m_1+m_2)V](https://tex.z-dn.net/?f=m_1u_1%2Bm_2u_2%3D%28m_1%2Bm_2%29V)
V is the final speed and u₂ = 0
![V=\dfrac{m_1u_1}{m_1+m_2}\\\\V=\dfrac{25000\times 4.5}{25000+58000}\\\\V=1.35\ m/s](https://tex.z-dn.net/?f=V%3D%5Cdfrac%7Bm_1u_1%7D%7Bm_1%2Bm_2%7D%5C%5C%5C%5CV%3D%5Cdfrac%7B25000%5Ctimes%204.5%7D%7B25000%2B58000%7D%5C%5C%5C%5CV%3D1.35%5C%20m%2Fs)
So, the final velocity of the two railroad cars is 1.35 m/s.
Answer: condenstation.
Justification:
The polymerization by condensation is a well know chemical reaction in which two monomers ("small" molecules), each with (at least) two functional groups, combine and relase water as by-product. Actually, even if the by-product released is not water, yet the reaction is called condenstation, since the mechanism is basically the same.
An example of such reaction is the manufacturing of nylon 6,6, which is produced from adipic acid and 1,6-diamine hexane:
HOOC - [CH₂]₄ - COOH + nH₂N - [CH₂]₆ - NH₂ → - nylon - + nH₂O
I omitted the formula of nylon because it is large, and that is not the core of the question but the fact the kind of reaction: two molecules combine to form is a larger molecule, and water is released
Answer:
c
Explanation:
iodine is the answer.please mark me as brianlist.
Answer:
Every mole contains 6.022 x 10^23 atoms regardless of what type of moelcules it is (Gold, Silver). So the anwer is 1.54 times 6.022 x 10^2