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
faltersainse [42]
4 years ago
12

A quantum of electromagnetic radiation has an energy of 2.0 kev. what is its frequency? planck's constant is 6.63 × 10−34 j · s.

answer in units of hz.
Physics
1 answer:
xxMikexx [17]4 years ago
8 0
A quantum of electromagnetic radiation is called photon, and the energy of a photon is given by
E=hf (1)
where h is the Planck constant and f is the frequency of the photon.

In this problem, the photon energy is
E=2.0 keV=2.0 \cdot 10^3 eV=3.2 \cdot 10^{-16} J
If we re-arrange equation (1), we can find the energy of the photon:
f= \frac{E}{h}= \frac{3.2 \cdot 10^{-16} J}{6.6 \cdot 10^{-34} Js}=4.8\cdot 10^{17} Hz
You might be interested in
If a woman weighs 125 lb, her mass expressed in kilograms is x kg, where x is
adelina 88 [10]
The first thing you should know to solve this problem is the conversion of pounds to kilograms:
 1lb = 0.45 Kg
 We can solve this problem by a simple rule of three
 1lb ---> 0.45Kg
 125lb ---> x
 Clearing x we have:
 x = ((125) / (1)) * (0.45) = 56.25 Kg.
 Answer
 her mass expressed in kilograms is 56.25 Kg.
3 0
3 years ago
Read 2 more answers
Organizing and interrupting information from the sense is called
NeTakaya

I think It is Perception


5 0
3 years ago
A DNA macromolecule is made up of two strands of DNA, which are connected to form a DNA double helix. The bonds between
Arturiano [62]

Answer:

where is the multiple choice?

6 0
3 years ago
The boiling point of ethanol is 78 ��
34kurt
  <span>The conversion for Kelvin from Celsius is simple since the units change at same rate (degree for degree) but haven't different zero reference. The Kelvin scale represents absolute zero. The celcius scale moves degree per degree with kelvin scale but has a zero based on freezing point of water. The conversion is 273 + (temperature in celcius) = temperature on kelvin scale. Note 273 is a rounded number to nearest whole number. The actual figure is a number with decimal. 273.15 can also be used if you want more significant figures. 

so 273 + 78C = 351 K </span>
7 0
3 years ago
Different forces were applied to five balls, and each force was applied for the same amount of time. The data is in the table. A
Annette [7]

The magnitude of impulse on Ball A will become twice (doubles). Hence, option (c) is correct.

Impulse:

The effect of applied force acting for a very small interval of time is known as Impulse.

Given data:

The initial magnitude of the force on Ball A is, F = 50 N.

The time interval for the applied force on Ball A is, t = 1.25 s.

And the impulse at initial on ball A is, I = 62.5 N-s.

Now, if force on ball A doubles, which means new magnitude of force is,

F' = 2F

F' = 2 × 50

F' = 100 N

For same time interval, the new impulse on Ball A is given as,

I' = F' × t

Solving as,

I' = 100 × 1.25

I' = 125 N-s

Taking the ratio of both the impulses as,

I' / I = 125/62.5

I' = 2 I

Thus, we can conclude that the magnitude of impulse on Ball A will become twice (doubles). Hence, option (c) is correct.

Learn more about the impulse here:

brainly.com/question/904448

7 0
3 years ago
Other questions:
  • Sayid drew an energy pyramid. What does each section of the triangle represent?
    9·2 answers
  • What volume of lead must be fastened underneath it to sink the wood in calm water so that its top is just even with the water le
    13·1 answer
  • Consider the classic problem with holiday lights, one little bulb goes out and the whole string goes out. First consider a strin
    9·1 answer
  • a bowling ball is rolling down the hall at a constant speed of 1.5 m/s. how far will the ball roll in 6.0 s.​
    6·1 answer
  • You are on a train traveling east at speed of 16 m/s with respect to the ground.
    11·1 answer
  • The design speed of a multilane highway is 60 mi/hr. What is the minimum stopping sight distance that should be provided on the
    15·1 answer
  • A 88 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.
    6·1 answer
  • The fossilizing process that replaces organic matter with silica or calcite is _____.
    15·2 answers
  • A train accelerates from 30 km/h to 45 km/h in 15.0 second. Find its acceleration and the distance it travels during this time
    8·1 answer
  • B
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!