Answer:
We can identify easily which block has more density, if we try to lift each one, and the heavier will be the one with more density. In this case the block of iron will be the one with more density.
Explanation:
To understand this we will give some numerical values to give the best explanation of this situation.
Let's say that we have the two blocks over one table, and over the table there is a special scale to measure the mass of an object.
Both block have the same dimensions, and seaching information of density by internet we find that the density for the iron is 7850 [kg/m^3], and the density for the aluminum is 2712 [kg/m^3]
Now the dimension of each bloack are 10*10*10 [cm] so, the volume will be 1000 [cm^3] = 0.001[m^3]
Now using the expression of density:
for the iron
for the aluminum
Therefore the weight of the iron will be always almost 3 times heavier than the weight of the aluminum.
Answer:
0.2358
Explanation:
We need here apply the law momentum conservation, for objects who collide.
The equation is given by,
Our values are giving by,
We replace in our equation and solve for V_f, then
Therefore their final velocity is -0.2358m/s (Negative symbol only indicate change in the direction)
Answer:
True.
Explanation:
The kinetic energy and potential energy are equal when an objects falls as its potential energy is converted into kinetic energy.