What fraction of a piece of iron will be submerged when it floats in mercury?

So this gives us the fraction submerged: the amount of iron within the mercury divided by the total volume of the mercury piece. So that's 7.8 times 10 to the 3 kilograms per cubic meter—density of iron— divided by 13.6 times 10 to the 3 kilogram's per cubic meter—density of mercury— which is 0.57

i don't know, you need to give me some answers.

explanation:

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: