A student applies 55 N of force to a box on four types of surfaces. Each surface has a different value for Ffric- On which surface is the student not able to move the box?
A. A
B. C
C. D
D. B

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus

Humans have to eat food to get the nutrients that keep us alive, but plants use the sun to power photosynthesis