De Broglie's identity gives the relationship between the momentum and the wavelength of a particle:
where
p is the particle momentum
m is its mass
v its velocity
h is the Planck constant
is the wavelength
By re-arranging the equation, we get
and by using the data about the proton, given in the text, we can find the proton's wavelength:
Mph (miles per hour) nfoejnfinweifniewqnf
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Inertia: One reason why its hard to get up in the morning for school.
The length of the ship in terms of Emily's equal steps is 84.
The given parameters;
- <em>equal steps forward = 210</em>
- <em>equal steps backward = 42</em>
Defined parameters:
- <em>Let the constant velocity of the ship = V</em>
- <em>Let the velocity of Emily = Vs</em>
- <em>Let the </em><em>length </em><em>of the </em><em>ship </em><em>= </em><em>d</em>
- <em>Let the time of motion, = t</em>
The velocity of Emily when moving forward in the direction of the ship:
The velocity of Emily when moving in opposite direction to the ship:
The constant velocity of the ship:
Apply relative velocity formula to determine the length of the ship:
<em>For </em><em>forward </em><em>(same direction) motion:</em>
<em>For </em><em>backward </em><em>(opposite direction) motion</em>:
Thus, we can conclude that the length of the ship in terms of Emily's equal steps is 84.
<em>"Your question is not complete, it seems to be missing the following information;"</em>
Emily sees a ship traveling at a constant speed along a straight section of a river. She walks parallel to the riverbank at a uniform rate faster than the ship. She counts 210 equal steps walking from the back of the ship to the front. Walking in the opposite direction, she counts 42 steps of the same size from the front of the ship to the back. In terms of Emily's equal steps, what is the length of the ship
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A person is submerged of about 97.9%.
The average density of the human body is given as 979 kg/ m³.
<h3>Define Law of floatation.</h3>
Law of floatation can be defined as the volume of the liquid displaced when a body floats on the liquid surface is equal to the body submerged in the water.
As body has the stable equilibrium state, the buoyancy of the fluid will be equal to the weight.
Weight of the body floating = Weight of the body immersed in fluid
Law of floatation = Density of the floating object / density of fluid
As fluid is the freshwater here, the density of fluid will be 1000 kg/ m³.
= (979 kg/ m³) / ( 1000 kg/ m³)
= 97.9 %
A person is submerged when floating gently in fresh water about 97.9%.
Learn more about law of floatation,
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