A model stands on a scale and finds her weight to be 105 pounds. Ifthe pressure exerted by her feet on the scale is 2.16 pounds per
square inch, what is the area of her feet in cubic centimeters?
__cm2
Answers
The area = 313.612 cm²
Further explanation
Force (F) can cause objects to move
While pressure (P)is the force per unit area
weight=force=105 pounds(lb)⇒english units
pressure = 2.16 lb/in²
Thea are (A)
Related Questions
Sodiun atom, potassium atom, and cesium atoms have the same ?
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Which of the following is most likely to be amorphous?-glass -solid sulfur -solid calcium -gold
Answers
Answer:
The answer is 8.00 moles
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
8.00 moles
Hope this helps you
(B) CO₃^{2−}
(C) Fe^{3+}
(D) Al^{3+}
(E) Pb^{2+}
Answers
Protons and electrons have the same mass.
b
Protons have a positive charge and are found in the nucleus.
c
Neutrons are negative and are found outside the nucleus.
d
Electrons are negative and are found in the nucleus.
Answers
The statement which is true about the subatomic particles within an atom is as follows:
- Protons have a positive charge and are found in the nucleus.
Thus, the correct option is B.
What are subatomic particles?
Subatomic particles may be defined as those particles that significantly compose an atom. Such particles are generally smaller than atoms. In other words, it can be said that the subatomic particles are united together to form any atom.
Protons are positively charged subatomic particles that are found in the nucleus of an atom. Electrons are negatively charged subatomic particles that are significantly revolving around the nucleus of an atom.
Neutrons do not have any charge, they are neutral and are found in the nucleus of an atom along with protons.
Therefore, the correct option for this question is B.
To learn more about Subatomic particles, refer to the link:
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Answers
Final answer:
An ion differs from an atom in that it has a net electrical charge, either positive or negative, due to the loss or gain of electrons.
Explanation:
An ion differs from an atom in that it has a net electrical charge. This charge is either positive or negative, resulting from the loss or gain of electrons by the atom. When an atom loses electrons, it becomes positively charged and forms a cation. On the other hand, when an atom gains electrons, it becomes negatively charged and forms an anion.
For example, let's consider sodium (Na) and chloride (Cl) atoms. Sodium has 11 protons and 11 electrons, making it neutral. However, when it loses an electron, it becomes a sodium ion (Na+), which now has 11 protons and 10 electrons, giving it a +1 charge. Chloride, on the other hand, has 17 protons and 17 electrons, making it neutral. But when it gains an electron, it becomes a chloride ion (Cl-), which now has 17 protons and 18 electrons, giving it a -1 charge.
So, while an atom is electrically neutral, an ion has a charge due to the loss or gain of electrons.
Learn more about Difference between an ion and an atom here:
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Answers
n = PV / RT
n = (98.7x 10^3 Pa x 0.01 m^3) / (8.314 Pa m^3/ mol K) x 298.15 K
n = 0.40 mol N2
At the second condition, the number of moles stays the same however pressure and temperature was changed. So, the new volume is calculated as follows:
V = nRT / P
V = 0.40 x 8.314 x 293.15 / 102.7 x 10^3
V = 9.49 x 10^-3 m^3 or 9.49 L
Answers
Answer:
Foliation is a strong, parallel alignment of coarse mica flakes and/or of different mineral bands in a metamorphic rock.
Explanation:
Foliation is most commonly prevalent in metamorphic rocks. Foliation is the parallel alignment of textural and structural features of a rock.
Differential stress plays a major role on the texture of metamorphic rocks because it forces the mineral constituent of the rocks to align parallel to each other. Foliation can occur in different ways for example a mineral like mica which is usually platy can crystallize in rocks , due to differential stress the mineral grows in such a way it remains parallel to the movement in which the part of the rock slide relative to one another and parallel to the forces applied or the mineral might grow perpendicular to the direction of the compressed stress.
Notice the foliation in the texture of gneiss .You can see the light and dark mineral found in separate or parallel layer.