Answer:
Price elasticity of demand = 0.25
Explanation:
The detailed steps and appropriate derivation is as shown in the attached file.
Carter pushes a bag full of basketball jerseys across the gym floor. The he pushes with a constant force of 21 newtons. If he pu
2 answers:
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(a) The capacitance of the capacitor is:
and the voltage applied across its plates is
The relationship between the charge Q on each plate of the capacitor, the capacitance and the voltage is:
and re-arranging it we find the charge stored in the capacitor:
(b) The electrical potential energy stored in a capacitor is given by
where C is the capacitance and V is the voltage. The new voltage is
so the energy stored in the capacitor is
and the voltage applied across its plates is
The relationship between the charge Q on each plate of the capacitor, the capacitance and the voltage is:
and re-arranging it we find the charge stored in the capacitor:
(b) The electrical potential energy stored in a capacitor is given by
where C is the capacitance and V is the voltage. The new voltage is
so the energy stored in the capacitor is
Answer:
the charge carriers have an energy 2.8 10⁻¹⁹ J
Explanation:
The energy in a diode is conserved so the energy supplied must be equal to the energy emitted in the form of photons.
The energy of a photon is given by the Planck expression
E = h f
the speed of light, wavelength and frequency are related
c = λ f
we substitute
E =
a red photon has a wavelength of lam = 700 nm = 700 10⁻⁹ m
we calculate the energy
E = 6.626 10⁻³⁴ 3 10⁸/700 10⁻⁹
E = 2.8397 10⁻¹⁹J
therefore the charge carriers have an energy 2.8 10⁻¹⁹ J,