No links plz!! Why can't we observe the image of a distant object in a concave mirror, but we can observe in a convex mirror? Both images are diminished.

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

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.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?