Answer:
when there is a group of organs that work together they are called the organ system
Explanation:
Answer:
17,932.69 g/mol is the molecular weight of the substance.
Explanation:
Using Beer-Lambert's law :
Formula used :
where,
A = absorbance of solution = 1.04
c = concentration of solution =?
l = length of the cell = 1 cm
= molar absorptivity of this solution = 18,650 
Now put all the given values in the above formula, we get the molar absorptivity of this solution.
c = 
V = Volume of the solution in L
Molecular weight of the substance = x
V = 100 mL = 0.1 L
Mass of the substance = 100 mg = 0.1 g
x = 17,932.69 g/mol
17,932.69 g/mol is the molecular weight of the substance.
Answer:
Color-Color in minerals is caused by the absorption, or lack of absorption, of various wavelengths of light. The color of light is determined by its wavelength. ... Some elements have electrons that absorb certain wavelengths or colors.
Streak-The streak of a mineral is the color of the powder produced when it is dragged across an un-weathered surface. ... Small amounts of an impurity that strongly absorbs a particular wavelength can radically change the wavelengths of light that are reflected by the specimen, and thus change the apparent color.
Hardness-The hardness of minerals is diagnostic because the hardness is determined by the strength of bonds and the structure of the mineral lattice. Hardness is basically the stress required to create and grow extended lattice defects such as micro-fractures, stress twins, and dislocations.
Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice. These two-dimensional surfaces are known as cleavage planes and are caused by the alignment of weaker bonds between atoms in the crystal lattice.
Answer:
A and B
Explanation:
This is because there was emission of gamma (Y) radiations in both the reactions.
Answer:
The correct answer is option c) has been heavily tested through repeated experimentation
Explanation:
Scientific laws are descriptive statements of relationships between observable phenomena. Scientific theories are explanations that are inferred from observable phenomena or regularities in those phenomena.
In other words, a scientific theory is the approach of a hypothetical-deductive system that constitutes a scientific explanation or description to a related set of observations or experiments. It is based on hypotheses or assumptions verified by groups of scientists and generally covers several scientific laws. These laws become part of the basic assumptions and hypotheses of the theory that will encompass the knowledge accepted by the scientific community.
So, a theory is a set of rules that describe the behavior of a particular system and a particular rule that is present in all known theories and is therefore considered "universally applicable."
An example is modern physics. This is a set of many theories, depending on the system to study. You have, for example, quantum mechanics for small-scale systems, special relativity for high-speed objects and general relativity for very massive systems. In all of them the conservation of energy is fulfilled. Therefore, the conservation of energy is called "law", while quantum mechanics, special relativity and general relativity have the category of "theory", being limited to concrete systems.
All of the above leads to being able to say that a theory tries to explain some phenomenon and is accepted as true by the scientific community. Theories describe the behavior of some specific system. A theory may be proven over the years that is not true. A law is what is scientifically proven to be true, it is universally applicable. For example, a theory can become law when it is demonstrated, for example, mathematically or experimentally. A law can also be revised and changed, but it is generally considered true and does not usually change.
So, the correct answer is option c)
