A car of mass M = 1000 kg traveling at 65.0 km/hour enters a banked turn covered with ice. The road is
banked at an angle 0, and there is no friction between
the road and the car's tires as shown in figure 1. What is the radius r of the turn 0=20.0*?

atomic = no of protons.

mass number-atomic number = neutron number

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.