Definition - What does Positive Displacement Pump mean? Positive Displacement Pump is a type of pump used to displace or force oil and petroleum products into pipelines or into various equipment installed in refineries.
A brain looks like a walnut because our minds are constantly making comparisons and finding similarities to help us understand the world around us. Here's an activity that can help you see more such things. Try to find faces.
Walnuts stand out from other nuts because they are particularly high in the omega-3 fatty acid ALA, or alpha linolenic acid. Omega-3s are a type of polyunsaturated fat that control blood clotting and help form cell membranes in the brain.