Answer:
The wavelength of the emitted photon is 413.6 nm
Explanation:
Given;
energy of the emitted photon, E = 3 eV = 3 x 1.602 x 10⁻¹⁹ J
speed of light, c = 3 x 10⁸ m/s
The energy of the emitted photon is given by;
E = hf
where;
h is Planck's constant = 6.626 x 10⁻³⁴ J/s
f is the frequency of the light = c / λ
λ is the wavelength
Therefore, the wavelength of the emitted photon is 413.6 nm
Answer:
find the change in momentum of the van
The small circle has 2 on each side and the rest have 8 as you can see but put them into pairs. you know how many to put based on the amount of protons (:
Answer:
<h2>9.48*10^-5J</h2>
Explanation:
Step one:
given data
mass of ball m=0.43kg
speed v= 75m/h >>>>> to m/s = 75*0.00027
v =0.021m/s
Required
the kinetic energy KE
Step two
applying
KE= 1/2mv^2
KE= 1/2*0.43*(0.021)^2
KE= 0.5*0.43*0.0004.41*10^-4
KE=0.000094815
KE=9.48*10^-5J
The kinetic energy is 9.48*10^-5J
To find the acceleration of the car, we can use the equation acelleration=final velocity-initial velocity/elapsed time. Since we know the initial velocity is zero from the start, than we can calculate it as final velocity/elapsed time. If we divide 36 by 10, we get 3.6. Your acceleration is 3.6 km/h.
Hope this helps! :D