When one observes a scratch on the bottom of a block of clear plastic, the scratch appears to be 2.5 cm below the top surface as viewed from above. the actual thickness of the plastic block is 3.0 cm. the index of refraction of the block is

Which would not reduce the amount of green house gasses in the air

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2