The table shows the potential energy and kinetic energy of a skier at two different positions on a hill. Position and Energy
Position (above ground)
Kinetic Energy
Potential Energy
100 meters
0 units
50,000 units
30 meters
35,000 units
?

What is the potential energy of the skier at a height of 30 meters above the ground?

85,000 units, because total energy increases
15,000 units, because total energy is 50,000 units
15,000 units, because total energy is 85,000 units
85,000 units, because total energy remains unchanged

the answer to your question is false can’t remember who he rode with but he rode with sombody

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)

good question. i'll be looking into that. (this is a joke sir)