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NikAS [45]
3 years ago
9

Two massive objects are fixed in position. A third object is placed directly between the first two at the position at which the

total gravitational force on the third object due to the two massive objects is zero. The object is displaced slightly toward one of the two massive objects, the total gravitational force on the third object is now

Physics
1 answer:
ivanzaharov [21]3 years ago
5 0

Answer:

Explanation:

Be M1 and M2 the two massive objects and m the third one

The gravitational force over the third object at the beginning is zero (assuming that the position of the third object is x=0)

F_{m}=-G\frac{mM_{1}}{x_{1}^{2}}-G\frac{mM_{2}}{x_{2}^{2}}=0

when the third object is displaced we have that the new position is x=Δx. Hence

F_{m}=-G\frac{mM_{1}}{(-x_{1}+\Delta x)^{2}}-G\frac{mM_{2}}{(x_{2}-\Delta x)^{2}}

I attached a scheme of the system

I hope this is useful for you

Regards

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3 years ago
The graph below represents the relationship between the force exerted on an elevator and the distance the elevator is lifted.
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I have three problems with this question.

#1). If you copied the question exactly the way it's written,
then the question is written very badly.  The wording is
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8 0
3 years ago
Bonsoir, je suis complètement bloquée, j’ai besoin de répondre aux 3 questions:
Lapatulllka [165]

Answer:

3)le changement oblige le monde à rechercher des sources d'énergie et de carburant alternatives à faible émission de carbone.... le remplacement des combustibles fossiles par des alternatives renouvelables telles que les biocarburants est un moyen efficace de réduire ces émissions ... ... combiné à une croissance économique significative dans les économies émergentes ... 3) Sécuriser l'approvisionnement énergétique

Explanation:2)Le calculateur d'équivalences de gaz à effet de serre utilise le taux d'émission marginal moyen pondéré national américain de CO2 moyen de l'outil AVoided Emissions and GenRation Tool (AVERT) pour convertir les réductions de kilowattheures en unités évitées d'émissions de dioxyde de carbone.

La plupart des utilisateurs du calculateur d'équivalences qui recherchent des équivalences pour les émissions liées à l'électricité veulent connaître les équivalences pour les réductions d'émissions des programmes d'efficacité énergétique (EE) ou d'énergie renouvelable (ER). Pour calculer les effets des émissions d'EE et d'ER sur le réseau électrique, il faut estimer la quantité de production d'énergie fossile et les émissions déplacées par l'EE et les ER. Un facteur d'émission marginal est la meilleure représentation pour estimer quelles unités alimentées aux combustibles fossiles EE / ER sont déplacées dans le parc fossile. Les programmes d'EE et d'ER ne sont généralement pas supposés affecter les centrales électriques de base qui fonctionnent tout le temps, mais plutôt les centrales électriques marginales qui sont mises en service si nécessaire pour répondre à la demande. Par conséquent, AVERT fournit un facteur d'émission marginal national pour le calculateur d'équivalences.

Facteur d'émission

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Calcul

8887 grammes de CO2 / gallon d'essence = 8,887 × 10-3 tonnes métriques de CO2 / gallon d'essence

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4 years ago
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