A camper stands in a valley between two parallel cliff walls. He claps his hands and notices that the echo from the nearby wall returns 0.9 s later while the echo from the farther wall returns 1.10 s later. If the air temperature is -10 C, how wide is the valley?

be subject to a force andchange its motion

momentum of soft ball three times less than baskey ball

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

talk back to him about the sport and show him your expertise or leave the room