A system will gain in G. P.E. if work is
done​

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.