In the lab you place a beaker that is half full of water (density pw ) on a scale. you now use a light string to suspend a piece of metal of volume v in the water. the metal is completely submerged, and none of the water spills out of the beaker.

give a symbolic expression for the change in reading of the scale. express your answer in terms of the variables pw, v, and appropriate constants. n2-n1=

N2- N1 =  V g

Explanation:

Let's use for this exercised the equilibrium relationship

        ∑ F = 0

        N -W = 0

        N = W = mg

Let's use density redefinition

       ρ = m / v

       m = ρ V

       N₁ = (ρ V) g

Repeat for when the liquid is submerged, in this case an upward thrust appears as a result of the water dispensed (rgow)

        N₂ + B - W = 0

        N₂ = W - B

        B = g

        = m / V

           =    V

        N = ρ V g -    Vg

        N2 = N1 +    V g

        N2- N1 =  V g

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop