Answer:
v = √ 2e (V₂-V₁) / m
Explanation:
For this exercise we can use the conservation of the energy of the electron
At the highest point. Resting on the top plate
Em₀ = U = -e V₁
At the lowest point. Just before touching the bottom plate
Emf = K + U = ½ m v² - e V₂
Energy is conserved
Em₀ = Emf
-eV₁ = ½ m v² - e V₂
v = √ 2e (V₂-V₁) / m
Where e is the charge of the electron, V₂-V₁ is the potential difference applied to the capacitor and m is the mass of the electron
Answer:
Without units, the results are unclear and it is hard to keep track of what each seperate measurement entails.
Answer:
0.900 mol/kg
Explanation:
Molality is moles of solute per kilograms of solvent.
Converting 54 grams of NaOH to moles:
54 g NaOH × (1 mol NaOH / 40.00 g NaOH) = 1.35 mol NaOH
So the molality is:
m = (1.35 mol) / (1.50 kg)
m = 0.900 mol/kg
Answer:
Explanation:
The relationship between wavelength and frequency is given by:
where
is the speed of light
f is the frequency
is the wavelength
In this problem, we know the wavelength:
So we can re-arrange the formula above to find the frequency:
Answer:
Length of the organ pipe is 6 meters.
Explanation:
Let resonance occur at wavelengths of 8 m at n and wavelength of 4.8 m at (n+2). We know that resonance occurs at,
L = 2 n.................(1)
And,
(from equation (1))
n = 3
Put the value of n in equation (1). So,
So, the length of the organ pipe is 6 meters. Hence, this is the required solution.
