- #1
Xaspire88
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A cube has a density of 2000 kg/m^3 while at rest in the laboratory. What is the cube's density as measured by an experimenter in the laboratory as the cube moves through the laboratory at 90% of the speed of light in a direction perpendicular to one of its faces?
It's the dimensions of the cube that change not the mass correct? if this is the case would i use the equation
[tex]L = L^1 \sqrt{1 - v^2/c^2} [/tex]
This would give me how the dimensions of the cube would change. This new length equals .316 m. And so the density would be 2000 kg/.316 m^3? and then in kg/m^3 would be 6324.56 kg/m^3? does this seem logical?
It's the dimensions of the cube that change not the mass correct? if this is the case would i use the equation
[tex]L = L^1 \sqrt{1 - v^2/c^2} [/tex]
This would give me how the dimensions of the cube would change. This new length equals .316 m. And so the density would be 2000 kg/.316 m^3? and then in kg/m^3 would be 6324.56 kg/m^3? does this seem logical?