4.00 × 105 J of work are done on a car while it accelerates from some speed to 30.0 m/s. If the mass of the car is 1185 kg, what was the initial speed?

it takes about 30 days for it to break down

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.