3 years ago

A nova occurs when

1 answer:

5 0

C. hydrogen accreted onto a white dwarf from a close companion rapidly fuses to helium, releasing a large amount of energy.

The accreted material, composed mainly of hydrogen, is compacted on the surface of the white dwarf due to the intense gravitational force on that place. As material accumulates, The white dwarf becomes increasingly hot, until it reaches the critical temperature for ignition of nuclear fusion.

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Answer these, and tell me HOW you got to the answer.

alex41 [277]

Here are the answers :)

$\boxed{\bf{27)~Contrast}}$

$\boxed{\bf{45)~The~edges~of~objects}}$ <span>

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</span> $\boxed{\bf{78)~Eyes~and~mouth}}$

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Hope that helps you! :)

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3 years ago

Once an object enters orbit, what keeps the object moving sideways?

yaroslaw [1]

It's the natural tendency of things to keep going unless there's something trying to stop them.

It's usually called "inertia".

Don't get the idea from all of this that things stop unless there's something to keep them going. The truth is exactly the opposite: Things keep going unless there's something to make them stop.

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3 years ago

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If you let him have Czechoslovakia, he is going to.

valentinak56 [21]

I - ok. Czechoslovakia is officially taken.

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2 years ago

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ipn [44]

h =(3.7 - .58)m = 3.12m

Now put PE into KE and we have to use the formula:

√2gh (g = gravity and h = height) therefor:

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I hope this helps!

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2 years ago

based on the law of conservation of energy. how can we reasonably improve a machines ability to do work? A.move the machine to a

natima [27]

The correct answer is

C. reduce the friction between its moving parts

In fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

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