When iron is exposed to oxygen it rusts or oxidizes. which of these represents the balanced equation for this chemical change? a) fe + o → feo b) feo → fe + o c) fe + o2 → fe2o3 d) 4fe + 3o2 → 2fe2o3

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped