Answer:
3 photons
Explanation:
The energy of a photon E can be calculated using this formula:
Where corresponds to Plank constant (6.626070x10^-34Js), is the speed of light in the vacuum (299792458m/s) and is the wavelength of the photon(in this case 800nm).
Tranform the units
The band Gap is 4eV, divide the band gap between the energy of the photon:
Rounding to the next integrer: 3.
Three photons are the minimum to equal or exceed the band gap.
Answer:
Explanation:
Given
time of contact between bat and ball is
suppose u is the incoming velocity and v is the final velocity after collision
Impulse exerted is given by change in momentum of the particle.
Initial momentum
Final momentum
Change in momentum
Impulse
Answer:
0.0312J
Explanation:
Let x be the distance the staple moves:
And spring constant is
Hence, the potential energy is 0.0312J
When a crest-trough meet the interference produced will be destructive in nature hence they both will cancel out and the amplitude produced will be equal to zero hence the loudness will reduce to zero.
A because it makes more sense