In its elemental state, carbon is available as: a
Coal
b Graphite
C Diamond
All of the above

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Apatient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn’t healed in a long time. what vitamin deficiency most likely caused this symptom?