Find L, the distance traveled along the incline by the block after it exitsthe gun. Ignore friction when the block is inside the gun. Also, assume that the uncompressed spring is just at the top of the gun(i. e., the block moves a distance x_c while inside of the gun). Use gfor the magnitude of acceleration due to gravity.
Express the distance L in terms of x_c, k, m,g, mu, and theta.

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

does anyone know or what?

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.