The answer is: " 5 g / cm³ " .
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Explanation:
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Density = mass divided by volume ; or: "D = m / V " ;
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and is expressed as: "mass per unit volume" ;
The mass, "m", is expressed in units of "g" (grams) ; and
the volume, "V" is expressed in units of "cm³ " or "mL" ; ("cm³ ", in this case);
{Note the exact conversion: " 1 cm³ = 1 mL " .} .
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So, if: the mass, "m = 100 g" {given} ;
and the volume, " V = 20 cm³ " {given} ;
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Plug these values into the formula/equation to solve for the density, "D" ;
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D = m / V = (100 g) / (20 cm³)
= (100 ÷ 20) g / cm³ = 5 g /cm³ .
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The answer is: " 5 g / cm³ " .
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Answer:
(a) The spacing of the fringes will remain unchanged if there is a change in the width of the slits but no change in the centers' distance.
(b) However, if the slits are made to be broader, wave interference will create less contrast. There will be a reduction in the intensity of the bright fringes.
Explanation:
The equation for the double slit experiment is shown below:
mλ = dsinθ
Thus: (a) The spacing of the fringes will remain unchanged if there is a change in the width of the slits but no change in the centers' distance.
(b) However, if the slits are made to be broader, wave interference will create less contrast. There will be a reduction in the intensity of the bright fringes.
The gravitational force of the planet pulling on the sun is equal to the gravitational force of the sun pulling on the planet
Explanation:
We can solve this problem by applying Newton's third law, which states that:
<em>"When an object A exerts a force (called </em><em>action</em><em>) on an object B, then object B exerts an equal and opposite force (called </em><em>reaction</em><em>) on object A"</em>
In this problem, we can identify:
- The sun as object A
- The planet as object B
By applying Newton's third law, we can state that:
- The action is the gravitational force exerted by the sun on the planet
- The reaction is the gravitational force exerted by the planet on the sun
According to the law, the two forces are equal in magnitude and opposite in direction: so, we can conclude that
The gravitational force of the planet pulling on the sun is equal to the gravitational force of the sun pulling on the planet
Learn more about Newton's third law:
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Answer:
option (a)
Explanation:
The magnetic field is produced by the electric current, and the direction of magnetic field is given by the Maxwells' right hand rule.
The magnetic field is also be produced by the time varying magnetic fields.