Discover Questions

If you started with 3.60g of Copper and reacted it with an excess of nitric acid what mass of copper hydroxide would you expect to recover? How long do the batteries in Beats executives last? How to test Petrol in blood? If the earth is truly spherical, why do we not feel like we are standing upside down or sideways on the earth? i need answers please.? If 5sinθ = 3 determine the value of:
1. cos (θ-360)
2. Tan (squared)θ
3. Sin θ x cos θ (all divided by cos (squared θ)?