Which of the following is a correct statement about the production of shale oil in the u. s.?
question 14 options:
a)
if political factors make petroleum expensive or impossible to obtain, the use of shale oil might increase.
b)
shale oil is an abundant resource and it is currently less expensive than petroleum to produce, but is not widely used.
c)
if petroleum becomes more expensive due to dwindling supplies, shale oil use still won't be economically feasible since it is so expensive to produce.
d)
development of new technology that reduces the cost of extracting shale oil is impossible due to environmental dangers.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.