go lower.
the rock has a greater volume than the marble
it is the bottom part of the back near the bum
The marble has lower drag so its terminal velocity would be greater. Each has its own terminal velocity.
It is a thin piece of marble stone attached to another surface. For instance you can have a marble veneer counter top or a solid marble counter top. A solid marble counter top would be 1 1/2" thick marble from top to bottom...a marble veneer counter top would be 1/2" marble attached to plywood
If the marble sinks in water, it is more dense than water. Objects that are denser than water will sink, while objects with lower density will float.
Hardness, Elasticity, Porosity, Permeability, Density, resistance to diagenesis, conditions of formation. Generalities (this means that in general the following are true and rules don't follow the exception if any exist) Hardness: marble is harder than limestone. It has a higher compressive strength and cohesion. This can get much more technical so let's leave it at that. Elasticity: Young's Modulus, shear modulus of marble is higher. Bulk modulus and poisson's ratio of marble is lower. Porosity of marble is lower. Permeability of marble is lower. Density of marble is higher. Limestone is often altered via fluids and chemical underground and marble isn't. Marble is metamorphic rock and limestone in sedimentary. Marble and Limestone are spelled different.
The starting height of the marble affects its initial speed, which in turn influences the time it takes to reach the bottom. A marble starting from a higher height will have a greater initial speed and reach the bottom faster compared to a marble starting from a lower height.
A marble would sink in shampoo because the density of the marble is greater than the density of the shampoo. Density is a measure of how much mass is contained in a given volume, and objects with higher density will sink in substances with lower density.
The quicker they are functioning, the lower the emissions will be.
It's a peculiarity of your rifle.
You ate food.Your body took energy from the food and stored it in your muscles.You transferred the energy from your muscles to the marble, when you LIFTED the marble against gravityand placed it on top of the roller coaster. Up there, the energy it had was potential. As it fell to lower heights,that potential energy became kinetic energy.