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3 years ago

What is 3,278,000 as scientific notation?

Physics

1 answer:

jonny [76]3 years ago

4 0

3.278*10^6 I think. Sorry if it’s wrong.

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The motion of an object parallel to the earth's surface is

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3 years ago

How can you decrease the numbers of calories you consume

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Answer: by eating less of the recommendEd servings

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2 years ago

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A jetliner, traveling northward, is landing with a speed of 69 m/s. Once the jet touches down, it has 750 m of runway in which t

Katena32 [7]

Answer:

Acceleration, $a=-3.14\ m/s^2$

Explanation:

It is given that,

Initial speed of the jetliner, u = 69 m/s

Final speed of the jetliner, v = 6.1 m/s

Distance covered, s = 750 m

We need to find the average acceleration of the jetliner. It can be calculated using third equation of motion as :

$a=\dfrac{v^2-u^2}{2s}$

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3 years ago

What is the longest wavelength of radiation with enough energy to break carbon-carbon bonds?

iogann1982 [59]

The longest wavelength of radiation used to break carbon-carbon bonds is 344 nm.

Explanation:

The longest wavelength of radiation can also be stated as the minimum radiation frequency required to cut carbon-carbon bond should be equal to the threshold energy of the carbon-carbon bonds.

The threshold energy will be equal to the binding energy of the carbon-carbon bonds. As it is known that carbon-carbon bonds exhibit a binding energy of 348 kJ/mole, the threshold energy to break it, is determined as followed.

First, we have to convert the energy from kJ/mol to J, i.e., energy for the carbon-carbon molecules,

$\text { Energy } = \frac{348 \mathrm{KJ} / \mathrm{mol}}{6.023 \times 10^{23} \text { photons }} \times 1 \text { mole } \times 1000 = 57.77 \times 10^{-20} = 5.78 \times 10^{-19} J$

As,

$E=h v=\frac{h c}{\lambda}$

So,

$\lambda=\frac{h c}{E}=\frac{6.626 \times 10^{-34} \times 3 * 10^{8}}{5.78 \times 10^{-19}}=3.44 \times 10^{-7}$

Thus, $\lambda=344 \mathrm{nm}$ is the longest wavelength of radiation used to break carbon-carbon bonds.

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3 years ago

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Answer:

Work is measured as the product of force and the displacement in the direction of the force. Work = force × displacement in the direction of the force.

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2 years ago