Physics, 13.11.2019 19:31 Hoeing3195
You have an evacuated, iron spherical shell and want to know how thick the shell wall is. however, you cannot cut open the iron shell to measure the thickness of the wall. the ball just floats once completely submerged in water, and you measure the outer diameter to be 58.7 cm. if the density of iron is 7.87 g/cm3, what is the thickness of the wall?
Answer from: lusan4u
26 cm
Explanation:
V = Volume
R = Outer radius of the shell = 58.7 cm
r = Inner radius of the shell
g = Acceleration due to gravity = 9.81 m/s²
\rho = Density
As the shell is completely submerged
Force on shell
Weight of the shell
Equating the two equations as the forces are conserved
Inner radius of the shell is 0.561 m
The thickness of the wall is 0.587-0.561 = 0.026 m = 26 cm
Answer from: Quest
hey , the answer is c
Answer from: Quest
the total distance traveled by the car is
30km + 49km = 79 km .
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