Uniform mementum mas is 90g is pivoted at 40cm mark if the metra rula ia in equilibrium with an mark unknown mass m place at the 10cm mark and mass of 73g placw at 70cm .ditermine the value of m when mass of an object is always at it center of gravity

Unknown mass,

Explanation:

From the figure below,

OE is a meter scale with markings in centimeter.

A is the position of unknown mass m, B is the position of 90 g mass, C is the fulcrum, D is the position of mass 73 g.

Length AC = 40 cm, BC = 10 cm, CD = 20 cm

For equilibrium of the meter scale,

Sum of anti-clockwise moments = Sum of clockwise moments

Therefore,unknown mass is 14 g.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.