Answer:
The correct answer is option a. 400J
Explanation:
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Let's solve this!
To know if the work is positive or negative we have to know the following:
The work is positive when the gas performs (expansion)
The work is negative when done outside on the gas (compression)
In this case the work is done by the gas, so it is positive.
The correct answer is option a. 400J
Answer:
━☆ﾟ.*･｡ﾟIf <em>the angle is the angle between the eastern axis and the vector, then the leg adjacent the angle is the x-component and the leg opposite the angle is the y-component. Thus, the cosine function is used to calculate the x-component and the sine function is used to calculate the y</em>
The intermolecular force attracts of the stearate ion in the oil drop.
<u>Explanation:</u>
- Dispersion force is the intermolecular force that attracts the stearate ion to the oil drop. The weak force with temporary dipoles. This force is referred to as induced dipole attraction.
- The Dispersion is meant as an electron in two atoms occupies the position and this force is called induced dipole attraction.
- The Dispersion force depends on the atomic and molecular weight of the material.
Answer:
E = 3.194 x 10⁹ J = 3.194 GJ
Explanation:
The formula for the absolute potential energy is:
U = - GMm/2r
where,
G = Gravitational Constant = 6.67 x 10⁺¹¹ N m²/kg²
M = mass of Earth = 5.972 x 10²⁴ kg
m = mass of satellite = 470 kg
r = distance between the center of Earth and satellite
Thus, the energy required from engine will be difference between the potential energies.
E = U₂ - U₁
E = - GMm/2r₂ - (- GMm/2r₁)
E = (GMm/2)(1/r₁ - 1/r₂)
where,
r₁ = Radius of Earth + 350 km = 6371 km + 350 km = 6721 km = 6.721 x 10⁶ m
r₂=Radius of Earth + 2350 km=6371 km + 2350 km= 8721 km = 8.721 x 10⁶ m
therefore,
E = [(6.67 x 10⁺¹¹ N m²/kg²)(5.972 x 10²⁴ kg)(470 kg)/2](1/6.721 x 10⁶ m - 1/8.721 x 10⁶ m)
<u>E = 3.194 x 10⁹ J = 3.194 GJ</u>
