Two samples of pure water are mixed with food coloring. One sample is red, and the other is blue. When the two water samples are combined, the red water floats on top of the blue water. Which statement best explains this result?
The density of the red water is lower than the density of the blue water.
Which investigation would best show the transfer of heat energy without any type of matter as a medium
One investigation that would best show the transfer of heat energy without any type of matter as a medium is through radiation. Radiation is the transfer of heat energy through electromagnetic waves, such as infrared radiation or light. An investigation could involve shining a heat source, like a lamp or a heater, on an object and observing how the object absorbs the heat energy without physical contact.
The red water floats on top of the blue water because of their difference in density.
The statement that best explains this result is that the red water is less dense than the blue water.
To understand why this happens, we need to consider the density of the substances involved. Density is the measure of how much mass is contained in a given volume of a substance. When two substances with different densities are mixed, the one with higher density will sink below the one with lower density.
In this case, water is mixed with food coloring, so the density of the water itself does not change. However, the food coloring molecules change the density of the water. It is likely that the red food coloring has a lower density compared to the blue food coloring.
When the two water samples are combined, the red water, being less dense, floats on top of the blue water, which has higher density. This happens because the denser substance sinks below the less dense substance due to gravity. As a result, you observe the red water floating on top of the blue water.