power = work/time
watt = joule/sec
a) power = 0.10 watt = 0.1joules/sec
work = power * time
= 0.10 * 1 =0.1joules
work is northing but energy
therefore energy is 0.1joules
according to planks quantum theory E = nhν where nis the no. of photons ; h is planks constant; ν isfrequency
hence, n = E/hν
or n = Eλ/hc (ν = c/λ)
n = (0.1*700*10^-9)/6.625*10^-34*3*10^8 = 0.3522*10^18photons
b) similar to the above calculation
here E = 1.0joules
n = (1.0*700*10^-9)/6.625*10^-34*3*10^8 = 0.3522*10^17photons
<span>Beta decay increases the atomic number by 1, and does not change the mass number. 28Mg12 → 0e-1 + 28Al13</span>
Answer:
the molecules slow down and get more dense
Explanation:
you seem to slow down when its cold too...
There's the electrons that surround the nucleus in shells. Electrons have a negative charge and way almost nothing.
In the nucleus, theres protons and neutrons. Neutrons have no charge while protons have a positve charge.
All atom have no charge unless they are ions where theres either more electrons than protons or vice versa.
Negative ions are attracted to positive ions e vice versa