What is Jupiters internal composition?
Jupiter's internal composition is primarily hydrogen and helium as liquids. As a gas giant, Jupiter does not have a solid surface.
Till is a term describing an unsorted sediment of varying composition. It consists of several different grain sizes and can contain different amounts of clay. As the angle of internal friction is based on the cohesion and grain size of the material the answer is that it varies depending on the composition of the specific till.
Saturn is thought to have a similar internal composition to that of Jupiter, with a small rocky core surrounded mostly by hydrogen and helium. The rocky core is similar in composition to the Earth, but much more dense. This is then surrounded by a thicker liquid metallic hydrogen layer, followed by a liquid hydrogen/helium layer. Saturns outermost layer, from the surface to 1000km down, is a gaseous Hydrogen/helium atmosphere.