Answer:
a) Both blocks displace the same amount of water.
Explanation:
Specific gravity (S.G.) is a quantity that tells how much and object is submerged on water and is given by:

with ρ the densities
Density of water is
and density of aluminum is 
So:

A S.G. value bigger than one means the object is totally submerged so the water displaced is equal to the volume of the cube.
For the lead (density =
) block we're going to calculate specific gravity in this case:

Again S.G gravity is bigger than 1, so the lead block is totally submerged too, that implies the volume of water displaced is the volume of the block, that is the same volume as the aluminum block, so a is the correct one.
Answer:
<h2>Heat flows from a warmer object to a cooler object. </h2>
Answer:
<h2>9572992.8 J</h2>
Explanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 4812 × 9.8 × 203
We have the final answer as
<h3>9572992.8 J</h3>
Hope this helps you