In a lab investigation, a group of students measures the speed of a 0.1-kilogram car at 0.80 m/sec at the bottom of a hill. The car’s starting position at the top of the hill is one-meter high. Does the potential energy at the top of the hill equal the kinetic energy at the bottom of the hill? If not, where did the energy go?

I'm not sure what your asking buddy.. but i know that you can weld two peices of steel by pure force and pressure.

When someone eats food

When seismic waves hit a fault, the waves are reflected off the fault. seismograph can detect these reflected seismic waves. geologists then use these data to map the fault's length and depth

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.