1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mkey [24]
3 years ago
8

What is the energy difference between the second excited state and first excited state of an electron in the "box" of size L=1nm

? A) 1.9 eV B) 1.1 eV C) 0.6 eV D) 0.3 eV E) 0.2 eV
Physics
1 answer:
jolli1 [7]3 years ago
4 0
I thinks it’s A, tell me if you get it right
You might be interested in
A wheel in the shape of a flat, heavy, uniform, solid disk is initially at rest at the top of an inclined plane of height 2.00 m
olasank [31]

Answer:

Explanation:

If friction is neglected, the wheel cannot roll and can only slide frictionlessly and will have the same velocity at the bottom of the ramp as if it had been in free fall as it has converted the same amount of potential energy.

mgh = ½mv²

v = √(2gh) = √(2(9.81)(2.00)) = 6.26418... = 6.26 m/s

However if we do not ignore all friction and the wheel rolls without slipping down the slope, the potential energy becomes linear and rotational kinetic energy

mgh = ½mv² + ½Iω²

mgh = ½mv² + ½(½mR²)(v/R)²

2gh = v² + ½v²

2gh = 3v²/2

v = √(4gh/3) =√(4(9.81)(2.00)/3) = 5.11468... = 5.11 m/s

7 0
2 years ago
A scientist reports a measurement of the temperature of the surface of a newly discovered planet as negative 20 Kelvin. What con
jarptica [38.1K]

Answer:

The temperature of this newly discovered planet violates the third law of thermodynamic, there is a mistake in this value.

Explanation:

The third law of the Thermodynamic says:

<u> At zero kelvin all molecular movement stops, which means that the entropy will be zero at this temperature.</u>

So we can say there is no thermodynamic system that has temperature values less than 0 K.

The conclusion of the report will be.

The temperature of this new planet violates the third law of thermodynamic, there is a mistake in this value.

I hope it helps you!

3 0
2 years ago
Which of the following forms of electromagnetic waves is LEAST dangerous to the human body?
makkiz [27]
<span>Which of the following forms of electromagnetic waves is LEAST dangerous to the human body? B
</span>
5 0
3 years ago
Read 2 more answers
If the mass of a ball is 50g on a height of 8m. Calculate the kinetic energy when it has a velocity of 3m/s.​
slega [8]

Answer:

kinetic energy is 1/2mv^2.

which is 1/2×0.05×3^2

1/2×0.05×9.

1/2×0.45=

0.45÷2=0.225~0.23J

7 0
2 years ago
I really need help
Alina [70]

Answer:

Find the velocity of a projectile at the highest point, if it is projected with a speed 15ms-1 in the direction 45∘ above horizontla. (take g = 10ms-2) Answer : 15√2ms-1 along horizontal

Explanation:

6 0
3 years ago
Other questions:
  • How could you increase the potential energy of the roller coaster shown below?
    10·2 answers
  • The distance traveled by an object can be modeled by the equation d = ut + 0.5at2 where d = distance, u = initial velocity, t =
    11·1 answer
  • Which of the following is the FINAL step in a forecasting​ system?A.Validate and implement the results.B.Select the forecast​ mo
    12·1 answer
  • Why should photons emitted by a hotter gas have, on average, shorter wavelengths than photons emitted by a cooler gas?
    14·1 answer
  • A 60.0 kg soccer player kicks a 0.4000 kg stationary soccer ball with 6.25 N of force. How fast does the soccer ball accelerate,
    5·1 answer
  • Which of the following codes is used to report the removal of 37 skin tags by electrosurgical destruction?
    15·1 answer
  • A time-dependent but otherwise uniform magnetic field of magnitude B0(t) is confined in a cylindrical region of radius 6.5 cm. I
    15·1 answer
  • Why can’t solids flow
    7·1 answer
  • (Q020) Stars a. all explode cataclysmically when they die and contribute their matter to future star generations. b. begin as pr
    5·1 answer
  • A drag racing vehicle travels from zero to a hundred miles per hour and 5 seconds north what is acceleration
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!