Answer:
The mass of the planet is 55 times the mass of earth.
Explanation:
From the inverse-square gravitation law,
F = (GMm/r²)
If the weight of a body (the force with which the earth attracts a body to its centre) is to be calculated,
F = mg
m = mass of the body,
g = acceleration due to gravity
mg = (GMm/r²)
G = Gravitational constant
M = mass of the earth
m = mass of body
r = distance between the body and the centre of the earth = radius of the earth
The acceleration due to gravity is given by
g = (GM/r²)
Making the mass of the earth, the subject of formula
M = (gr²/G) (eqn 1)
So, the planet described,
Let the acceleration due to gravity on the planet be g₁
Mass of the planet be M₁
Radius of the planet be r₁
g₁ = 2.2g
r₁ = 5r
M₁ = ?
Note that the gravitational constant is the same for both planets.
So, we can write a similar expression for the planet's acceleration due to gravity
g₁ = (GM₁/r₁²)
Substituting all the parameters known in terms of their corresponding earth values
2.2g = [GM₁/(5r)²]
2.2g = [GM₁/25r²]
M₁ = (55gr²/G)
Recall the expression for the mass of the earth
M = (gr²/G)
M₁ = 55 M
The mass of the planet, in terms of Earth masses = 55M
The mass of the planet is 55 times the planet of earth.
Hope this Helps!!!
the heat (energy) you must give to it is
is the specific heat of that substance (given in J/(g*Celsius))