Two speakers hang from racks placed in an open field. When sound of the same frequency comes from both speakers, no sound is heard in some locations. The sound is loud in other places at about the same distance from the speakers. Explain.

Which type of microscope would allow the viewer to see ribosomes inside a cell?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

I’ve been stuck on this for a while