An electron is trapped in a square well of unknown width, L. It starts in unknown energy level, n. When it falls to level n-1 it

Answer:

Explanation:

For a 60W light bulb used for 1 minute:

P = 60 W

t = 1 minute = 60 seconds

This energy is capable of lifting an object weighing 10N.

W = 10N

This indicates conversion of electrical energy into potential energy.

Let's calculate the electrical energy:

Power describes the rate of work done.

Power = Work / time

Thus, work = power × time

Work = 60 × 60

Work = 3600 J

Potential energy calculation:

P.E = mgh

Where the weight is given by:

W = mg

Therefore, P.E = W·h

P.E = 10·h

Thus, we equate:

Potential energy = Electrical energy

P.E = Work

10·h = 3600

Dividing both sides by 10 gives:

h = 3600 / 10

h = 360m

The object can be lifted to a height of 360m.

Answer: Tension = 47.8N, Δx = 11.5× m.

              Tension = 95.6N, Δx = 15.4× m

Explanation: The speed of a wave on a string under tension can be determined using the following:

denotes tension (N)

μ refers to linear density (kg/m)

Calculating the velocity:

0.0935 m/s

Distance a pulse traveled in 1.23ms:

Δx = 11.5×

With a tension of 47.8N, the distance a pulse will cover is Δx = 11.5×  m.

When tension is doubled:

|v| = 0.1252 m/s

Distance in the same time:

15.4×

With the increased tension, it moves 15.4× m