The speed of sound in air at room temperature is about 343 m/s. calculate this speed in miles per hour (1mi =1609m).

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

d : a person who learns about the world by observing it. no that is not a smiley face

explanation: