10 Psychological Tricks That Can Make Your Life Much Easier
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Answer
given,
mass of car (m) = 1200 Kg
speed of cur, u = 25 m/s
mass of truck(M) = 9000 Kg
speed of truck, u' = 20 m/s
v = 18 m/s
a) using conservation of momentum
m u + M u' = m v + M v'
1200 x 25 + 9000 x 20 = 1200 x 18 + 9000 x v'
9000 v' = 188400
v' = 20.93 m/s
b) To calculate losses, we will find the kinetic energies before & after collision. Any difference would give us the losses (in energy form).
(K E)₁= (K E)₂+ Losses
losses = (K E)₂ - (K E)₁
=
=
=9038 J
To solve this problem it is necessary to apply the related concepts to the principle of overlap, specifically to single slit diffraction experiment concept.
Mathematically this can be expressed as:
Where,
d = Width of the slit
Wavelength
Angle relative to the original direction of the light
m = Any integer which represent the order of the equation (number of repetition of the spectrum)
To solve the problem we need to rearrange the equation and find the wavelength
Our values are given as,
Replacing in our equation we have,
Therefore the wavelength is 523.2nm
Number of electrons transferred:
Explanation:
The charge on the first object is
while the charge on the 2nd object is
When they are in contact, the final charge on each object will be
So, the amount of charge (electrons) transferred from the 1st object to the 2nd object is
The charge of one electron is
Therefore, the number of electrons transferred is
Learn more about electrons:
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