Photon has no rest mass but when photon travels at the speed of light, it gains momentum.
The energy of the photon is E= pc, c = speed of the photon and p= its momentum.
∴ E = pc
but p = h/λ (This comes from De-broglie's theory)
∴ E = hc/λ
frequency = ν = c/λ
∴E = hν
Answer:
The correct answer is actually D) They rotate quickly and are large and gaseous.
Think about the features of the outer planets.
I got this question wrong because of the previous user that answered this.
here is proof that my answer is correct:
The three main cycles of an ecosystem are the water cycle, the carbon cycle and the nitrogen cycle.
Answer:
a) 20.54 J
b) 30.97 J
c) 10.43 J
d) -20.54 J
Explanation:
m = Mass
g = Acceleration due to gravity = 9.81 m/s²
h = Height
Work done by the ball's weight is 20.54 J
Gravitational potential energy of the basketball, relative to the ground, when it is released is 30.97 J
Gravitational potential energy of the basketball, relative to the ground, when it is released is 10.43 J
Change in gravitational potential energy
Change in gravitational potential energy is given by -20.54 J