caminando wrote:...if they eat 0.4kg they eat 0.4 kg, no matter what material or what thing they are eating.
But what
volume do they eat?
By the way, kilograms measure mass. This unit is commonly used as a proxy for weight, but mass and weight are not the same. Mass is just the "stuff"; weight is the force the stuff exerts, being the product of the mass and the acceleration due to gravity. ("Force" equals "mass" times "acceleration", or, symbolically, F = ma.) Gravity is acceleration, and this acceleration is applied to every object on the planet's surface. The product of the acceleration and the mass is the force which we call "weight".
In English units, the force is "pounds"; the unit of mass is the "slug".
While the gravitational constant G is universal (the value is the same everywhere in the universe), the constant "g" for any particular body varies. This is why you would weigh only about 1/6 as much on Earth's moon as you would on Earth: the Earth and its moon have different masses within spheres of different radii, so the value of "g" for each is distinct. And this is why we needed to consider radius and gravity to find the mass, etc, for Neopia.
Density is the amount of mass ("stuff") in a certain volume. Most of an atom is empty space, some molecules are "airy", and some structures are fairly "open". So a fixed volume (say, a cubic foot) of different materials will contain different masses, and thus will have different weights. If you fill one shoe-box with gravel and another with packing peanuts, you may fill about the same area, but the box of rocks will be much heavier. The mass makes the difference; the volume is not sufficient information.
Since, for this Lenny, the rate of consumption was given in terms of mass (0.4 kg), but you were asked for the time in terms of a volume (1 km^3), there had to be some consideration made of mass and density, in order to be able to convert from the one to the other.
Eliz.
Have you seen Are You Smarter than a 5th Grader? This is exactly like that. I will try to do it alone!!
so I'm not sure if it would impact it. I'm just saying that could there be a possibility? I mean, it kinda did make sense to me. I have no numbers or symbols. I only have ideas. 