Edwin Hubble was an American astronomer who played a crucial role in collecting evidence to support the theory that the universe
is constantly expanding outward and is not simply static. He used light from distance stars to calculate their movement. Meanwhile, around this same period of time, a Russian physicist by the name of Mikhail Lomonosov worked tirelessly in his lab studying different chemical reactions. Lomonosov would later help in developing the Law of Mass Conservation which states that during a chemical reaction the total mass of the substances before the reaction is equal to the total mass after the chemical reaction.
How are the methods used in the pursuit of a scientific explanation different between Edwin Hubble and Mikhail Lomonosov?
A) Edwin Hubble carefully identified and manipulated variables to answer questions; Mikhail Lomonosov made observations about the natural world.
B) Edwin Hubble made observations about what he studied; Mikhail Lomonosov did not
C) Edwin Hubble and Mikhail Lomonosov both used scientific equipment and collected evidence
D) Edwin Hubble made observations about the natural world; Mikhail Lomonosov carefully identified and manipulated variables to answer questions.
These type of questions leave a great deal to be desired. There is no mention of which way Hubble used and manipulated data. He studied the variations in light to determine his conclusions.
Nor is there any mention of what Lomonosov did to come to the conclusion that conservation of mass is a constant.
We don't know what was done to get the results. Hubble was studying the universe; the conclusions made by Lomonosov depended on lab equipment that was very delicate (I'm assuming). I doubt he manipulated variables. He measured what he got.
I think the answer is C, but the question has so many assumptions that it is hard to know what answer to pick.
The answer is a nuclear reaction releases more energy per gram and appears to violate the law of conservation of mass<span>.
Some main differences between the chemical and nuclear reactions are: - The nuclear reaction releases more energy per gram. - The nuclear reaction takes place in the nucleus of the atom. - In the nuclear reaction, part of the mass is converted into energy, which </span><span>violates the law of conservation of mass.</span>
The well know desert plant Cacti have been a very interesting speciman in terms of survival and its adaptation to its enviornment in order to succeed in the game of survival.
In order to maintain the moisture within the plant, its leaves are in the shape of needles which can lead to less water evoporating from the plant.
The inners of Cacti have been modified to store water for prolonged periods of time in order to survive the long periods of drought and lack of water.
The structure and outer skin of the Cactus has been able to help them once again maintain water levels within itself as traits such as waxy and thick skin cover the entirety of the plant.
