Which of these is the beginning of the life cycle of stars with different initial masses?

1 answer:

5 0

The doppler effect, when used with light, produces a shift of frequencies to red. Well, no matter which direction you look, there is a shift to red! That means that the universe is expanding or moving away from us in every direction. The idea, is that this could only happen if all matter was once in a single point, and there was an explosion. This explosion from a single point is called the big bang theory.
A nebula is a cloud of gases that can coagulate to become a new star.

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How the wildebeest are keystone species and the connection between fires , tree .?

nadezda [96]

Answer:Wildebeest are considered keystone species because their presence has myriad effects on the ecosystem, unlike those of any other species. Wildebeest are the "lawnmowers" of the Serengeti grassland. They keep grass short which in turn reduces the frequency of fires.

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3 years ago

5. Some undiluted acids are more corrosive when diluted

wlad13 [49]

Answer:

The correct answer is : due to the hydrogen ions reacts and release high amount of energy with the strong acid.

Explanation:

Diluted acids are more corrosive then undiluted due to the presence of more H+ ions than the undiluted acids. The More the H+ ions are added the more corrosive the acid is.

When water is mixed with strong acid the hydrogen ions reacts with acid ions and a exothermic reaction takes place that release high amount of energy which boils violently, to avoid any accident it is advised to lab workers to wipe if any splash self before washing.

Thus, the correct answer is : due to the hydrogen ions reacts and release high amount of energy with the strong acid.

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3 years ago

Select the correct answer.

Rudik [331]

Answer: Excretory

Explanation: My grandpa went through this recently and I had to learn all about it. :(

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How do biologists use genetic engineering to build recombinant DNA?

coldgirl [10]

they combine the DNA of two different organims.

Explanation:

they join together genetic material especially the DNA from different biological species

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2 years ago

"A snail is an organism". Based on this I would expect that a snail to

kow [346]

Answer:

it's D. has cells

Explanation:

an organism is made of many different cells. what makes something not an organism is how it has no cells, and how it that can't carry out all of the basic physiological functions of a living thing. Organisms grow, adapt, respond to stimuli, and reproduce.

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