Una fuente sonora emite un sonido con una frecuencia de 650 Hz, y se desplaza con una velocidad de 80m/seg. Un receptor se puede desplazar a 40 m/seg. Determine la frecuencia del sonido percibido por el receptor. Considere los casos posibles de efecto doppler. Temperatura ambiente 19ºC. Coloque los signos correspondientes para determinar la fórmula para el caso indicado. La fuente se aleja de un receptor en reposo

la fuente se acerca de un receptor en reposo

fuente en reposo y receptor se aleja de la fuente

fuente en reposo y receptor se acercca a la fuente

receptor y fuente acercandose el uno del otro

receptor y fuente alejandose el uno del otro

receptor persiguiendo a la fuente

fuente persiguiendo al receptor

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question