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2 answers:
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Refer to the diagram shown.
There are twelve 5-minute divisions.
Each 5-minute division is equal to 360°/12 = 30°.
By convention, angles are measured counterclockwise from the positive x-axis.
The angular position of the minute hand at 2:55 is
θ = 90° + 30° = 120°
Because 360° = 2π radians, therefore
θ = (120/360)*2π = (2π)/3 radians = 2.0944 radians
Answer: (2π)/3 radians ofr 2.0944 radians.
There are twelve 5-minute divisions.
Each 5-minute division is equal to 360°/12 = 30°.
By convention, angles are measured counterclockwise from the positive x-axis.
The angular position of the minute hand at 2:55 is
θ = 90° + 30° = 120°
Because 360° = 2π radians, therefore
θ = (120/360)*2π = (2π)/3 radians = 2.0944 radians
Answer: (2π)/3 radians ofr 2.0944 radians.
First, let's calculate the frequency of this radiation, which is given by:
where c is the speed of light and
is the photon wavelength. For this radiation, photons have wavelength of
Therefore their frequency is
The energy of a photon with frequency f is given by
where h is the Planck constant. By using the frequency we found before, we find the energy of a single photon of this radiation:
where c is the speed of light and
Therefore their frequency is
The energy of a photon with frequency f is given by
where h is the Planck constant. By using the frequency we found before, we find the energy of a single photon of this radiation: