So, I’m assuming that we’re treating light as a propagating wave.
Amplitude measures the amount of energy transported by a wave, thus amplitude squared is directly proportional to the light’s energy. The higher the amplitude, the higher the energy.
Energy is also directly proportional to the frequency of a wave, the higher the frequency, the higher the energy.
I took my second answer from the formula below:
E=cf
1). the total voltage between the ends of the series circuit was constant.
The resistance of the circuit and the current through the circuit changed.
2). The voltage between the end terminals of the parallel circuit is constant.
The resistance of the circuit and the current through the circuit changed.
3). So that you can avoid building a circuit that needs more current
than your battery can supply, and also to be sure and choose a battery
or power supply that's able to deliver the amount of current that your
circuit needs.
Answer:

Explanation:
As we know that base of the slab is given as


now we know that rate of heat transfer is given as

here we know that

Also we have



Explanation:
The runner was 8.6km away from the finish line when the bird starts flying.
Therefore it takes the bird 8.6/14.4 = 0.60 hours for the bird to fly to the finish line.
In that 0.60 hours, the runner would have ran an extra 3.6km/h * 0.6h = 2.16km.
Now, the runner and the bird are flying towards each other. The distance between them is 8.6 - 2.16 = 6.44km and their combined speed is 18.0km.
Hence, they will meet in 6.44/18.0 = 0.36 hours.
Overall, the bird flew for 0.60 + 0.36 = 0.96 hours, and flew 14.4km/h * 0.96h = 13.8km.
So i believe is exercise:)