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3 years ago

Please help on this one ? :)

Physics

2 answers:

Mamont248 [21]3 years ago

5 0

KE depends on velocity. It is easier to answer this question in terms of the earth.

The closer the object (earth/comet) is to the sun, the faster it moves. that means that the fastest moving point would be as the comet/earth passes through point C.

The slowest speed would be the furthest away from the sun which is point A.

Answer: The faster the planet moves the greater the Kinetic Energy.

The Slower the planet moves, the less the KE.

Point A is where it is slowest with the lowest amount of energy.

Discussion

The formula for KE is KE = 1/2mv^2. The mass of the comet or earth is a constant. It doesn't change no matter which point the comet passes through. If v goes down KE will go down. If v goes up, KE goes up.

skelet666 [1.2K]3 years ago

5 0

You posted the same picture yesterday, and learned that ‘C’ is the point of the MOST kinetic energy because it’s closest to the sun and moving fastest. Then I suggested that you review Kepler’s 2nd law.

From that answer OR from Kepler, it should be clear that the LEAST kinetic energy is at ‘A’ .

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Give a different example of an inverse relationship (not using wavelength or frequency

ivanzaharov [21]

An example of an inverse relationship is the one between pressure and volume of an ideal gas

Explanation:

Boyle's law states that:

<em>"For a gas kept at a constant temperature, the pressure of the gas is inversely proportional to its volume" </em>

Mathematically,

$pV=const.$

where p is the pressure of the gas and V its volume.

The relationship can be written as

$p\propto \frac{1}{V}$

Therefore it is an example of inverse relationship, because:

As the volume increases, the pressure decreases
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2 years ago

A gas expands and does PV work on its surroundings equal to 319 J. At the same time, it absorbs 136 J of heat from the surroundi

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Answer:

The change in energy of the gas during the process is $-1.83\times 10^{2}$ joules.

Explanation:

We can represent this process by the First Law of Thermodynamics, in which gas does work on its surroundings and absorbs heat from there to describe its change in energy. In other words:

$Q_{in} - W_{out} = \Delta E$

Where:

$Q_{in}$ - Heat absorbed by the gas, measured in joules.

$W_{out}$ - Work done by the gas, measured in joules.

$\Delta E$ - Change in energy, measured in joules.

If we know that $Q_{in} = 1.36\times 10^{2}\,J$ and $W_{out} = 3.19\times 10^{2}\,J$ , the change in energy of the gas is:

$\Delta E = 1.36\times 10^{2}\,J-3.19\times 10^{2}\,J$

$\Delta E = -1.83\times 10^{2}\,J$

The change in energy of the gas during the process is $-1.83\times 10^{2}$ joules.

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2 years ago

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Explanation:

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2 years ago

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Vladimir79 [104]

Volcanic islands, Mountain ranges

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An ocean-continent convergence creates a subduction zone in which the denser oceanic plate sinks beneath the less dense continental crust.
As the oceanic plate begins to subside, it can melt and form chains of volcanic island within the riding continents.
Also, where two plates of equal densities converge, none of them subsides and this leads to upbuilding.
The product can be seen as extensive mountain ranges on earth like the Andes and Himalayas.

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2 years ago

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Explanation:

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3 years ago