Electromagnetic waves of various frequencies reach earth from distant parts of the universe. which of the following can be inferred from this?

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?

If i add water to oil what will happen

In a ball-and-stick molecular model, what do the sticks represent?