the answer is c I hope this helps
i think photons with shorter wavelengths have larger speed.
I apologise if its incorrect.
The input work = Force x distance
So I/P = 45 x 1.5 = 67.5 N.m
The output work = Force x distance
So, O/P = 87.6 x 0.4 = 35.04 N.m
Efficiency = (output work / Inputwork) x 100
= ( 35.04/67.5) x100
Efficiency = 51.91 %
Answer:

Explanation:
To convert the energy of the cereal to know the weight:






Supuse the gravity as a g=9.8m/s^2


Answer:
1. The field inside the shell is 0; TRUE
2. The field for r>R will be the same as a field for the point charge Q, at the origin: TRUE
3. only positive charges can be on the outside surface: FALSE (Negative can too!!!)
4. The field on the outside is perpendicular to the surface: TRUE
Explanation: