Answer:
E = 4.76 eV
Explanation:
It is given that,
Wavelength = 417 nm
Potential difference = 1.15 V
We need to find the energy of a photon of this light in electron volts. The energy of a photon is given by :
Where
h is Planck's constant, c is speed of light
We know that,
or
E = 4.76 eV
So, the energy of a photon is 4.76 eV.
The Answer is B. The Motion of the butter molecules remains the same
To calculate wind chill, enter the current ambient temperature in degrees Fahrenheit (°F) and enter the speed of the wind in miles per hour
Answer:
h = P₁ / 9800
Explanation:
This is a fluid mechanics problem, let's write the Bernoulli equation at two points, the subscript 1 for the lowest point and the subscript of 2 for the point with the highest height.
P₁ + ½ ρ v₁² + ρ g y₁ = P₂ + ½ ρ v₂² + ρ g y₂
at the highest point P₂ = 0 and v₂ = 0,
P1 + ½ ρ v12 = ρ g (y₂ -y₁)
we use the continuity equation for the velocity at the lowest point
A₁ v₁ = A₂ v₂
Since the velocity at the highest point is zero, this implies from the equation that the velocity at the lowest point is also zero. In the no-flow condition
P₁ = ρ g (y₂ -y₁)
h = y₂-y₁
h = P₁ /ρ g
the density of water is ρ = 1000 kg / m³ and g = 9.8 m/s², we substitute
h = P₁ / 9800
Let's do a calculation, suppose that P₁ = 1 10⁵ Pa
h = 1 10⁵ / 9800
h = 10.2 m
Wherever a river loses energy