Physics
What is the wavelength of visible spectrum ?

1300 A°–3000 A°
3900 A° – 7600 A°
8500 A° – 9800 A°
7800 A° – 8000 A°

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Physics
What is a neuron ?

Particle released during radioactivity
The anti-particle of neutron
Basic unit of energy
Basic unit of nervous system

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Physics
Acceleration is

Directly proportional to force
Directly proportional to mass
Inversely proportional to mass
Inversely proportional to force

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