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19 Nov 2019
In the early stages of primordial nucleosynthesis, a nuclear reaction involving one protein and one reaction formed which of the following? a.^2_1 D b.^1_1 H c.^4_2 He d.^D_-1 e c.^D_-1 e + y A supernova event is the explosion caused by the collapse of a dying star that has run out of its nuclear fuel. These stars and events are responsible for a. the production of elements beaver than iron-56. b. nuclear fission of heavy elements. c. the distribution of heavy elements throughout the universe. d. both a and c. e. both b and c. What is the wavelength (lambda, in m) of a radio station operating at a frequency of 99.6 MHz? a. 3.01 times 10^6 m b. 3.01 m c. 3.32 times 10^-7 m d. 0.332 m c. 3.32 m Fraunhofer lines are due to a. emission of radiation by atoms. b. absorption of radiation by atoms. c. the photoelectric effect. d. chemical reactions in the sun. e. nuclear reactions in the sun. What is the energy (E, in J) of the 488 nm photons emitted by an argon-ion laser? a. 2.46 times 10^18 J b. 9.69 times 10^-23 J c. 1.36 times 10^36 J d. 4.07 times 10^-19 J e. 2.46 times 10^-18 J Electromagnetic radiation with a frequency of 8.6 times 10^14 Hz incident on an unknown metal surface causes ejection of photoelectrons with kinetic energies of 1.3 times 10^-19 J. What is the unknown metal? a. rubidium (= 3.5 times 10^-19 J) b. gold (= 8.2 times 10^-19 J) c. nickel (= 8.3 times 10^-19 J) d. sodium (= 4.4 times 10^-19 J) e. platinum (= 9.1 times 10^-19 J)
In the early stages of primordial nucleosynthesis, a nuclear reaction involving one protein and one reaction formed which of the following? a.^2_1 D b.^1_1 H c.^4_2 He d.^D_-1 e c.^D_-1 e + y A supernova event is the explosion caused by the collapse of a dying star that has run out of its nuclear fuel. These stars and events are responsible for a. the production of elements beaver than iron-56. b. nuclear fission of heavy elements. c. the distribution of heavy elements throughout the universe. d. both a and c. e. both b and c. What is the wavelength (lambda, in m) of a radio station operating at a frequency of 99.6 MHz? a. 3.01 times 10^6 m b. 3.01 m c. 3.32 times 10^-7 m d. 0.332 m c. 3.32 m Fraunhofer lines are due to a. emission of radiation by atoms. b. absorption of radiation by atoms. c. the photoelectric effect. d. chemical reactions in the sun. e. nuclear reactions in the sun. What is the energy (E, in J) of the 488 nm photons emitted by an argon-ion laser? a. 2.46 times 10^18 J b. 9.69 times 10^-23 J c. 1.36 times 10^36 J d. 4.07 times 10^-19 J e. 2.46 times 10^-18 J Electromagnetic radiation with a frequency of 8.6 times 10^14 Hz incident on an unknown metal surface causes ejection of photoelectrons with kinetic energies of 1.3 times 10^-19 J. What is the unknown metal? a. rubidium (= 3.5 times 10^-19 J) b. gold (= 8.2 times 10^-19 J) c. nickel (= 8.3 times 10^-19 J) d. sodium (= 4.4 times 10^-19 J) e. platinum (= 9.1 times 10^-19 J)
Jamar FerryLv2
26 Apr 2019