The density of the cube of wood placed in the tub of water is determined as 700 kg/m³.
<h3>
Specific gravity of the wood</h3>
The specific gravity of the wood is the fraction of the entire wood volume below water surface.
Height below water surface = 20 cm - 6 cm = 14 cm
S.G = 14 cm/20 cm
S.G = 0.7
<h3>Density of the wood</h3>
The density of the wood is calculated with respect to density of water.
S.G = ( density of wood) / (density of water)
0.7 = (density of wood) / (1000 kg/m³)
density of wood = 0.7 x 1000 kg/m³
density of wood = 700 kg/m³
Learn more about density here: brainly.com/question/6838128
That's right, the correct answer is
<span>A) The isotopes have a long half-life and only remain radioactive for a long time period
The half life of an isotope is the time it takes for the amount of the sample to reduce to half of its initial value. If an isotope has a long half-life, it means it takes a long time to reduce down to a significant level, so it will remain radioactive for a long time period.</span>
The answer is D. Kelvin hope this helps
Force due to gravity = 4080 x 9.81 = 40,025 N
Force of trailer parallel to slope = 40025 sin 14.5 = 10021 N (resolve horizontally)
<span>I used the acceleration of gravity as 9.81 m/s. If they want you to use 10 m/s, just switch it with the 9.81 in the first equation. Ignore the speed of the trailer. That is just to throw you off.</span>