1/ Define los siguientes conceptos: a) La Física:
b) La Química:
2/ Explica la diferencia entre un cambio físico y un cambio químico y pon un ejemplo: 3.- Nombra las cuatro etapas del método científico y explica cada una de ellas: 4.- ¿Que es una magnitud? Pon algún ejemplo.
5.- Nombra 3 magnitudes fundamentales del Sistema Internacional y las unidades en las que se miden:

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Asystematic approach to problem solving is called a (an)

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.