Answer: The compositional, mechanical and outermost layer
Explanation:
They are some vital properties that are considered when looking at the properties are useful in distinguishing and modeling the various distinct layers and structures of Earth. They are the mechanical layers, compositional later and the outermost solid layer. The mechanical layers are determined by their physical features, the compositional layers are determined by their components, while the outermost layer describes the natural satellite
Answer:
The answer is c. a hypothesis.
Explanation:
A hypothesis is a possible explanation for a phenomenon that can and has yet to be tested. Hypotheses are usually made through observation, and the understanding of previous scientific theories.
In the passage, Professor Delano's hypothesis can be tested by analysing data about a sample of workers. It was also based on the genetic approach to mate choosing, a well-researched scientific theory.
I'm not sure what class this is for, but in Psychology this would be considered Naturalistic Observation. Hope this helps :)
Answer:
502.51 kg/m^3
Explanation:
Upthrust on object in water is 40 - 20 = 20 N
Upthrust is equal to the buoyancy forces given as
B = pgv
p is density of water 1000 kg/m^3
g = acceleration due to gravity 9.81 m/s^2
v is the volume of liquid displaced.
Therefore
B = 1000 x 9.81 x v
20 = 9810v
v = 2.038x10^-3 m^3
For Upthrust in unknown liquid, we have 40 - 30 = 10 N
Bouyancy force for the liquid will be
B = P x 9.81 x 2.038x10^-3
NB- the same volume of fluid will be displaced i.e 2.038x10^-3 m^3
Equating we have
10 = P x 9.81 x 2.038x10^-3
10 = 0.0199p
p = 10/0.0199 = 502.51 kg/m^3
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