The objects have different densities
They objects may possess the same volume; however, due to a difference in density, they do not possess the same mass within that volume. This means that they experience a different gravitational force, which causes one to sink and the other to float.
Answer:

Explanation:
Ohms law says that the current in the conductor between the two points is directly related or directly proportional to the voltage by keeping a proportionality of constant which is called resistance.
Mathematically Ohms law can be written as,

Here, I is the current measure in ampere or amperage, V is voltage measure in voltage and R is resistance measure in Ohm.
Now the relation between the amperage, voltage and resistance will be,

Amperage=Voltage/Resistance
Explanation:
EE = ½ kx²
EE = ½ (0.55 N/m) (0.15 m)²
EE = 0.62 J
the Doppler effect. (I don't know how to explain it lol)