Question

3).
what is the frequency of an electron traveling at 2.65M/S. The mass
of an electron is 9.11×10^-28 g.

4). The conversion of microwave energy to thermal energy in
the microwave oven is 92%. How many photons are needed to heat 150
ML of water from 20°C to 100°C, if the wavelength of the microwave
photon is 1.22×10^8 nm?

Answer #1

Part A: The frequency of green light is
approximately 6.0*1014 s-1. The mass of an
electron is 9.11*10-31 kg. If an electron absorbs all
the energy from one photon of green light, and all of it becomes
kinetic energy for the the electron, how much more kinetic energy
will the electron have after absorbing the photon?
Part B: What is the wavelength of a photon with
the frequency 4.0*1014 Hz?
Part C: Photons with a frequency of
4.0*1014 Hz are...

Be sure to answer all parts. A microwave oven operating at 1.22
× 108 nm is used to heat 165 mL of water (roughly the volume of a
teacup) from 37.0°C to 100.0°C. Calculate the number of photons
needed if 91.5 percent of microwave energy is converted to the
thermal energy of water. × 10 photons

Suppose that a certain microwave oven has radiation having a
wavelength of 11.2 cm.
(i) What is the frequency, in s-1, of this
radiation?
(ii)What is the wavenumber, in cm-1, of this
radiation?
(iii)What is the energy, in J, of a single photon of this
radiation?
(iv) How many photons of this light would be required to heat
250.0 mL of water from 22.0oC to 85.0oC? Take
the density of water as 1.00 g/mL and its specific...

What is the Kinetic Energy of an electron traveling at 0.8c. Its
rest mass energy is 0.511 Mev. (b) What is the total energy? (c)
What is the momentum ? Mass = 9.11 x 10^-31

A particular microwave oven delivers 750 watts (exact value). (A
watt is a unit of power, which is the joules of energy delivered,
or used, per second.) If the oven uses microwave radiation with a
wavelength of 12.6 cm, how many photons of this radiation are
required to heat 1.00 g of water by 1.00 °C, assuming that all of
the photons are absorbed? The specific heat of water is 4.184 J /
g•°C at 25°C.

A contianer with 0.485 L of water
is placed into a microwave and is then radiated with
electromagnetic energy that has a wavelength of 10.5 cm. The
temperature of the water then rose by 67.7 degrees Celcius.
Calculate the number of photons that were absorbed by the water.
Assume water has a density of 1.00 g/mL and its specific heat is
4.184 J/g degree C
1.) What formula is used for calculating the energy absorbed by
the water?
2.) Calculate...

Please answer and explain
6. It takes 7.21x10-19J of energy to remove an electron from an
atom of iron. Which of the following would be able to do it? A. A
photon with wavelength 276 nm B. A photon with frequency 1.1x1015
Hz C. Ten photons of frequency 1.1x1014 Hz each D. A and B E. All
of the above
7. A particle has a velocity that is 90. % of the speed of
light. If it is a wave...

A. What is the energy in 10-3 eV of a photon that has
a momentum of 6.13×10−29 kg ⋅ m/s ?
B. What is the energy in 10-9 eV of a photon in a
radio wave from an AM station that has a 1,506 kHz broadcast
frequency?
C. Calculate the frequency in 1020 Hz of a 0.571 MeV
γ-ray photon.
D. A certain molecule oscillates with a frequency of
1.73×1013 Hz. What is the approximate value of
n for a...

23. Photons and Energy
A. A certain source emits radiation of wavelength
500.0 nm. Determine its frequency. Calculate the energy associated
with this photon at 500.0 nm.
B. If it takes 3.36 x 10-19 J of energy to eject an
electron from the surface of a certain metal, Calculate the
frequency of this energy and the longest possible wavelength in
nm.
C. Ionization energy is the energy required to remove
an electron from an atom in...

Violet light has a wavelength of about 410 nm.
a. What is its frequency?
b. Calculate the energy of one photon of violet light
c. What is the energy of 1.0 mol of violet photons (hint: 1
mol=6.02*10^23)
d. Compare the energy of photons of violet light with those of
red light (700nm). Which has the greater energy?

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