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amm1812
4 years ago
15

A conductor has a net charge of +24 uC. How many electrons are needed to make this conductor neutral

Physics
1 answer:
Arte-miy333 [17]4 years ago
7 0
The charge on the conductor is +24 μC,  since the charge is positive, same amount of charge but it will be negative.

That is - 24 μC.

To know the number of electrons, we know that the charge of an  electron =
-1.6 * 10^-19 C.

=    - 24 μC / (-1.6 * 10^-19 C)

=  (-24 * 10^-6) / (-1.6 * 10^-19 C)      Use your calculator

=  15 * 10^13

=  1.5 * 10 ^14  Electrons.
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How much energy is required to ionize hydrogen when it is in the n = 5 state?
PtichkaEL [24]

Answer:

0.544 eV

Explanation:

To ionize the hydrogen atom n_f\rightarrow infinte

So the required energy is \Delta E=13.6(\frac{1}{n_i^2}-\frac{1}{n_f^2}) as  n_f\rightarrow infinte

So \Delta E=13.6\frac{1}{n_i^2}

We have to calculate the energy required to ionize hydrogen atom when it is in n=5

So the energy should be less than \Delta E=13.6\frac{1}{5^2}=0.544eV

4 0
3 years ago
Osmium (os) is the densest element known (density = 22.57 g/cm3). Calculate the mass in pounds and in kilograms of an os sphere
Rufina [12.5K]

<u>Answer:</u>

    Mass in kg = 39.88

    Mass in pounds = 87.92

<u>Explanation:</u>

   We have the expression for Density, ρ = Mass / Volume, in this case density is given and we need to find mass and volume.

   Volume of a sphere, we have the expression V = \frac{4}{3} \pi r^3, where r is the radius of sphere.

   Radius of sphere, r = Half of diameter = 15/2 = 7.5 cm

   So V = \frac{4}{3}* \pi* 7.5^3 = 1767.15 cm^3

  Mass = Volume *  Density = 1767.15*22.57 = 39884.49 g

    Mass in kg = 39884.49/1000 = 39.88 kg

    Mass in pounds = 39.88*2.205 = 87.92 lb

4 0
3 years ago
if a football player does 39,000 J of work, how much power does the football player exert in 5 minutes?
elena-s [515]

Power = Work / Time

= 39000 / 5

= 7800 J/s

7 0
4 years ago
A car has a velocity of 15 m/s.
yan [13]

Explanation:

Given:

v₀ = 15 m/s

a = 3.5 m/s²

t = 5.0 s

Find: v

v = at + v₀

v = (3.5 m/s²) (5.0 s) + 15 m/s

v = 32.5 m/s

5 0
4 years ago
Which model shows 4 electrons in the outer shell of the atom?
nasty-shy [4]
D.4
hope it helps have a great day!
8 0
3 years ago
Read 2 more answers
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