Items Item 3 How much force is needed to cause a 15 kilogram bicycle to accelerate at a rate of 10 meters per second per second?
1 answer:
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Answer:
"h" signifies Planck's constant
Explanation:
In the equation energy E = h X v
The "h" there signifies Planck's constant
Planck's constant is a value, that shows the rate at which the energy of a photon increases/decreases, as the frequency of its electromagnetic wave changes.
It was named after Max Planck who discovered this unique relationship between the energy of a light wave and its frequency.
Planck's constant, "h" is usually expressed in Joules second
Planck's constant =
Answer:
The focal length of the lens in ethyl alcohol is 41.07 cm.
Explanation:
Given that,
Refractive index of glass= 1.500
Refractive index of air= 1.000
Refractive index of ethyl alcohol = 1.360
Focal length = 11.5 cm
We need to calculate the focal length of the lens in ethyl alcohol
Using formula of focal length for glass air system
Using formula of focal length for glass ethyl alcohol system
Divided equation (II) by (I)
Where, = refractive index of glass
= refractive index of air
= refractive index of ethyl
Put the value into the formula
Hence, The focal length of the lens in ethyl alcohol is 41.07 cm.