a satellite with a mass of 100kg fires it’s engines to increase velocity, thereby increasing the size of its orbit around the ea
1 answer:
The approximate change in gravitational force from Earth as a result of the change in radius of the satellite's orbit is -95.07N
<h3>What is the universal law of gravitation?</h3>The universal law of gravitation states that the particle of matter in the universe attracts another particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
It is written thus;
F = G ÷
Where
F = Gravitational force
G = Gravitational constant
and
are the masses of the object
r = radius
How to calculate the gravitational force
Formula:
F = G ÷
Given = 100kg
= 5.97 x
kg
r = 7.5 x m
G = 6.67 x N-m²/kg²
For the first orbit, substitute the values
F = 6.67 x × 150 × 5.97 x
÷ (7.5 x
)
F = 5.95 × ÷ 56.25 ×
= 105.77 N
For the second orbit of radius 7.7 x 10^6 m
F = 6.67 x × 100 × 5.97 x
÷ (7.7 x
)2
F = 5.95 × ÷ 59.25 ×
= 200. 84 N
The approximate change = 105. 77 - 200. 84 = -95.07N
Hence, the approximate change in gravitational force from Earth as a result of the change in radius of the satellite's orbit is -95.07N
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And in the end, the oxygen:
We can multiply all coefficients by 2 to get integer ones:
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The enthalpy of reaction can be calculated by adding the enthalpies of formation of the products multiplied by their stoichiometric coefficients and substracting the sum of enthalpies of formation of the reactants multiplied by their stoichiometric coefficients.
For the reactants, we have (the enthalpy of formation of pure compounds is zero, which is the case for O₂):
For the products, we have:
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Now, this enthalpy of reaction is for 2 moles of C₈H₁₈, so for 1 mol of C₈H₁₈ we have half this value:
Now, we have 100 g of C₈H₁₈, and its molar weight is approximately 114.22852 g/mol, so the number of moles in 100 g of C₈H₁₈ is:
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Now, for the other part, we need to calculate how much heat it is necessary to melt a mass, <em>m</em>.
First, we have to heat the ice to 0 °C, so:
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Converting mass to number of moles of water we have:
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Adding them, we have a total heat of:
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Answer:
Second Law
Explanation:
Newton's second law states that the acceleration caused in a body is directly proportional to the force applied and inversely proportion to the mass of the body.
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In this case the suggestion given to reduce the aircraft's cargo load is the right move as reducing the load on the aircraft will decrease the mass of the whole aircraft. This in turn will help the aircraft to accelerate more as acceleration inversely varies with mass. Thus the aircraft will be able to reach its flying speed even on a short run way.
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B. →
C. →
What is a balanced chemical equation?
An equation that has an equal number of atoms of each element on both sides of the equation is called a balanced chemical equation.
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