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choli [55]
3 years ago
13

The weight of an objects can be calculated by multiplying mass by

Physics
2 answers:
Lana71 [14]3 years ago
7 0
Acceleration due to gravity. 
dmitriy555 [2]3 years ago
6 0
It can be calculated by multiplying mass and free-fall acceleration 
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action and reaction are equal in magnitude and opposite direction then why they don't balance each other
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3 years ago
Wavelength of blue photons 495 nm, what is the frequency? and what is the energy?
inessss [21]

Answer:

1.F: About 6*10^14 Hz

2.E: About 4*10^ -19 J

Explanation:

Frequency: We knew that the speed of a wave is its wavelength(λ)* frequency(f, in Hz).  By the wave-particle duality we know we can calculate the frequency of light in the same way. So, c=495nm *f, f=c/495nm=> (299,792,458 m/s) / (4.95*10^-7 m)

=6.05*10^14 /s

Energy: The energy photon contains can be calculate by this formula-- E=hf

f is the frequency and h is Planck's constant which is about 6.62 ×10^-34 *m^2*kg/s (after dimensional analysis ) =6.62*10^ -34 J*s.

So, the energy of a blue photon is (6.05*10^14)*(6.62*10^-34)=40.051*10^-20=  4.051*10^-19 J

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3 years ago
One person can hold mutiple types of authority at a time<br><br><br> T/F
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