Radio telescopes are said to "listen" to space because... 1. they monitor sound waves
2. they detect radio waves
3. they detect electromagnetic waves
4. they detect only aural EM waves

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.

Un conductor circula por una carretera en una velocidad de 90 km/h y b que se enciende la luz amarilla de un semáforo situado una distancia de 150 m. si el semáforo tarda tres segundos en cambiar a rojo el coche frena con una aceleración de 2 m por segundos 2¿ cometer una infracción ese conductor?