Un coche inicia un viaje de 450km a las ocho de la mañana con una velocidad media de 90k/h .¿ a que hora llegara a su destino?

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.