What is an unprotected railroad crossing? a) A railroad crossing without a fence surrounding it b) A railroad crossing without flashing lights or barricades c) A railroad crossing with flashing lights or barricades d) Stopping on top of the railroad tracks

1. Can you think of some ways that you use energy everyday? 2. Can you think of a time when you've had both potential and kinetic energy? How could you have more of each type? 3. Are there any words you know that sound similar to any of the vocabulary in the reading? How do the meanings of those words compare to these?

a) Si te dicen que el ancho de una puerta a diseñar en CAD es de 87 pulgadas, ¿a cuánto equivale en centimetros con el sistema internacional? b) Entre tres piezas de aluminio se tiene una masa de 38 libras, ¿cuánta masa tienen estas mismas piezas expresadas en el sistema internacionsl? c) ¿Cuál es la equivalencia de 24 yardas en metros? d) Explica con tus palabas por que es importante definir les unidados de medición precisas aÍmomento de elaborar un plano, trazo o una figura en CAD.

What tool would you use to measure length in feet?

How many oz in chick fil a large drink?

Quale unità di misura useresti per misurare l'altezza di una lampada: pollici o piedi?