John rode 3,150 m at an average speed of 350 m/min. If he
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Answer:
Explanation:
<u>Vertical Launch Upwards</u>
In a vertical launch upwards, an object is launched vertically up from a height H without taking into consideration any kind of friction with the air.
If vo is the initial speed and g is the acceleration of gravity, the maximum height reached by the object is given by:
The object referred to in the question is thrown from a height H=0 and the maximum height is hm=77.5 m.
(a)
To find the initial speed we solve for vo:
(b)
The maximum time or the time taken by the object to reach its highest point is calculated as follows:
The energy of a photon is given by
where h is the Planck constant and f is the photon frequency.
We can find the photon's frequency by using the following relationship:
where c is the speed of light and
is the photon's wavelength. By plugging numbers into the equation, we find
And so now we can find the photon energy
We know that 1 Joule corresponds to
So we can convert the photon's energy into electronvolts:
where h is the Planck constant and f is the photon frequency.
We can find the photon's frequency by using the following relationship:
where c is the speed of light and
And so now we can find the photon energy
We know that 1 Joule corresponds to
So we can convert the photon's energy into electronvolts: