What is the value for the potential energy for a n = 4 bohr orbit electron in zeptojoules?

The energy  is 1.36 10³ zJ

Explanation:

The equation for hydrogram atom energy with the Bohr model is

       Eₙ = -13.606 / n² [eV]

This equation gives the result in electron volts that can be transformed to joule,

       1 eV = 1.6 10-19 J

Let's calculate the energy and then reduce

       n = 4

       E₄ = -13.606 / 4²

       E₄ = 0.85 eV

       E₄ = 0.85 eV (1.6 10⁻¹⁹ J / 1 eV)

       E₄= 1.36 10⁻¹⁹ J

Now we reduce to this submultiple of the correct unit

       1 zepto = 10⁻²¹

       1 J = 10 21 zJ

       E4 = 1.36 10⁻¹⁹ J (10 21 zJ / J)

       E4 = 1.36 10³  zJ

The energy  is 1.36 10³ zJ

false

explanation:

boats, things on boats luggage are way more heavy then water.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day