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A microwave emits photons with frequency of 2.45 times 10^9 Hz....
A laser emits light with a frequency of 1.59 Times 10^15 Hz. What is the energy...
A laser emits light with a frequency of 1.59 Times 10^15 Hz. What is the energy of one photon of the radiation from this laser?
Question 6 10 pts How many infrared photons of frequency 2.43 x 1013 Hz would need...
Question 6 10 pts How many infrared photons of frequency 2.43 x 1013 Hz would need to be absorbed simultaneously by a tightly bound molecule to break it apart? The binding energy of such a molecule is 10 eV. You should round your answer to the nearest integer.
Question 10 5 pts Aradio antenna emits EM waves at a frequency of 100 MHz and...
Question 10 5 pts Aradio antenna emits EM waves at a frequency of 100 MHz and intensity of 0.2 W/m2. What is the photon density in one cubic meter of the beam? 1.0E12 photons/cubic meter 1.0E16 photons/cubic meter OO 1.0E20 photons/cubic meter 1.4E31 photons/cubic meter 6.1E32 photons/cubic meter Question 11 5 pts A square planar loop of coiled wire has a length of 0.25 m on a side and is rotated 60 times per second between the poles of a...
s. What is the wavelength of a neutron traveling at a speed of 4.15 km/s? 9....
s. What is the wavelength of a neutron traveling at a speed of 4.15 km/s? 9. Explain why the following sets of quantum numbers never occur: 10. The energy of a photon is 3.34 X 10-19J. What is the wavelength of the light? What color is this? 11. A microwave oven heats by radiating food with microwave radiation, which is absorbed by the food and converted to heat. If the radiation wavelength is 12.5 cm, how many photons of this...
1. Find the velocity of an electron emitted by a metal whose threshold frequency is 2.18×1014...
1. Find the velocity of an electron emitted by a metal whose threshold frequency is 2.18×1014 s−1 when it is exposed to visible light of wavelength 4.80×10−7 m . 2. Water is exposed to infrared radiation of wavelength 2.9×10−4 cm . Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.0 g of water by 2.2 K ? 3. Reset the PhET simulation (using the button in...
A photon with frequency 9.996 x 10^14 Hz strikes a slab of lead and is absorbed...
A photon with frequency 9.996 x 10^14 Hz strikes a slab of lead and is absorbed without freeing an electron. a) If the frequency of that photon is the threshold frequency for lead, calculate the work function for lead. Express your answer in eV. b) Assume a photon of wavelength 200 nm strikes the lead, freeing an electron. Calculate the maximum kinetic energy (in Joules) of the liberated electron. c) Calculate the de Broglie wavelength of the emitted electron. You...
Q1) The lowest frequency available on a radio's AM dial is 570 kilohertz (kHz). What is...
Q1) The lowest frequency available on a radio's AM dial is 570 kilohertz (kHz). What is the wavelength of this light? Select one: a. 1.8 X 10-6 m b. 5.3 X 102 m c. 1.8 X 10-7 m d. 5.3 X 104 m e. 1.9 X 10-3 m Q2) Many handheld laser pointers emit 650 nm light. What is the frequency of this light? Select one: a. 5.1 X 10-3 Hz b. 2.2 X 10-15 Hz c. 4.6 X 1014...
please help me with #9 and 10 before 9:30 9. If the specific heat of methanol...
please help me with #9 and 10 before 9:30
9. If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the temperature of 50 g of methanol from 20 °C to 60 °C? 10. When a 3.25 g sample of solid sodium hydroxide was dissolved in a calorimeter in 100.0 g of water, the temperature rose from 23.9 °C to 32.0 °C. Calculate AH (in kJ/mol NaOH) for the following solution process: NaOH(s) —...
Calculate the final temperature for each of the following mixtures. Assume no heat loss to the...
Calculate the final temperature for each of the following mixtures. Assume no heat loss to the environment. Show your method for part b. 50.0 g of water at 25.0 degree C is mixed with 50.0 g of water at 85.0 degree C. 75.0 g of water at 25.0 degree C is mixed with 25.0 g of water at 85.0 degree C. In Part B of this experiment, 0.10 g of Mg is added to 50. mL of 1.0M HCl. Which...
I need help solving these. I need to know the steps and calculations. 1. (1 pt)...
I need help solving these. I need to know the steps
and calculations.
1. (1 pt) How many moles of K2S are 2.70 g K,S? 2. (1 pt) What is the mass of 4.26 g of K2S? 3. (1 pt) How many atoms of Cu are in 7.1 moles of Cu? 4. (1 pt) How many moles of C are in 5.80 x 10atoms of C? 5. (2 pts) How many atoms of Fe are in 81.4 g Fe? 6....
A laser emits light with a frequency of 1.59 Times 10^15 Hz. What is the energy of one photon of the radiation from this laser?
Question 6 10 pts How many infrared photons of frequency 2.43 x 1013 Hz would need to be absorbed simultaneously by a tightly bound molecule to break it apart? The binding energy of such a molecule is 10 eV. You should round your answer to the nearest integer.
Question 10 5 pts Aradio antenna emits EM waves at a frequency of 100 MHz and intensity of 0.2 W/m2. What is the photon density in one cubic meter of the beam? 1.0E12 photons/cubic meter 1.0E16 photons/cubic meter OO 1.0E20 photons/cubic meter 1.4E31 photons/cubic meter 6.1E32 photons/cubic meter Question 11 5 pts A square planar loop of coiled wire has a length of 0.25 m on a side and is rotated 60 times per second between the poles of a...
s. What is the wavelength of a neutron traveling at a speed of 4.15 km/s? 9. Explain why the following sets of quantum numbers never occur: 10. The energy of a photon is 3.34 X 10-19J. What is the wavelength of the light? What color is this? 11. A microwave oven heats by radiating food with microwave radiation, which is absorbed by the food and converted to heat. If the radiation wavelength is 12.5 cm, how many photons of this...
please help me with #9 and 10 before 9:30
9. If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the temperature of 50 g of methanol from 20 °C to 60 °C? 10. When a 3.25 g sample of solid sodium hydroxide was dissolved in a calorimeter in 100.0 g of water, the temperature rose from 23.9 °C to 32.0 °C. Calculate AH (in kJ/mol NaOH) for the following solution process: NaOH(s) —...
Calculate the final temperature for each of the following mixtures. Assume no heat loss to the environment. Show your method for part b. 50.0 g of water at 25.0 degree C is mixed with 50.0 g of water at 85.0 degree C. 75.0 g of water at 25.0 degree C is mixed with 25.0 g of water at 85.0 degree C. In Part B of this experiment, 0.10 g of Mg is added to 50. mL of 1.0M HCl. Which...
I need help solving these. I need to know the steps
and calculations.
1. (1 pt) How many moles of K2S are 2.70 g K,S? 2. (1 pt) What is the mass of 4.26 g of K2S? 3. (1 pt) How many atoms of Cu are in 7.1 moles of Cu? 4. (1 pt) How many moles of C are in 5.80 x 10atoms of C? 5. (2 pts) How many atoms of Fe are in 81.4 g Fe? 6....
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