C.There is an invisible magnetic field around the magnet where it exerts magnetic force
The air flows slower in a bigger space. The air in a small space hit each other heating up, and move faster and faster. is that what your asking?
Answer:
a) 
b) 
Explanation:
The energy of the photon (E) for
orbit of the hydrogen atom is given as:

where,
= 13.6 eV
n = orbit
a) Now for the transition from n = 4 to n = 5


b) Now for the transition from n = 5 to n = 6


I found: 16,905J
Explanation:
The Gravitational Potential Energy will depend on the work done against gravity (weight,
W=mg) to lift it at height h or:
U = mgh =750 * 9.8 *2.3 =16,905J
From my research, the following image is used for the problem. For each segment, the displacement can be obtained by looking for the area under the segment.
Part A:
displacement = (1/2)*10*2 = 10m
Part B:
displacement = [(1/2)*4*5] + (5*2) = 20m
<span>Part C:
</span>
displacement = [(1/2)*4*10] + (2*10) = 40m