Jaiden is writing a report about the structure of the atom. In her report, she says that the atom has three main parts and two s
2 answers:
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a) 4F0
b) Speed of planet B is the same as speed of planet A
Speed of planet C is twice the speed of planet A
Explanation:
a)
The magnitude of the gravitational force between two objects is given by the formula
where
G is the gravitational constant
m1, m2 are the masses of the 2 objects
r is the separation between the objects
For the system planet A - Star A, we have:
So the force is
For the system planet B - Star B, we have:
So the force is
So, the magnitude of the gravitational force exerted on planet B by star B is 4F0.
For the system planet C - Star C, we have:
So the force is
So, the magnitude of the gravitational force exerted on planet C by star C is 4F0.
b)
The gravitational force on the planet orbiting around the star is equal to the centripetal force, therefore we can write:
where
m is the mass of the planet
M is the mass of the star
v is the tangential speed
We can re-arrange the equation solving for v, and we find an expression for the speed:
For System A,
So the tangential speed is
For system B,
So the tangential speed is
So, the speed of planet B is the same as planet A.
For system C,
So the tangential speed is
So, the speed of planet C is twice the speed of planet A.
Answer:
<h2> 242.5kPa</h2>Explanation:
According to one of the gas laws,
Given P1 = 240.0kPa, T1, 15.0°C, T2 = 18.0°C, P2 = ?
Substituting this values into the equation, we have;
Cross multiplying we have;
288P2 = 240*291
The new pressure is 242.5kPa