Part A In a photoelectric-effect experiment, the maximum kinetic energy of electrons is 3.2 eV . When the wavelength of the light is increased by 50%, the maximum energy decreases to 1.4 eV What is the work function of the cathode? Express your answer using two significant figures. Eo = 2.2 eV Submit Previous Answers v Correct Part B What is the initial wavelength? Express your answer using two significant figures. ? 1= 240 nm O Review your calculations and make sure you round to 2 significant figures in the last step. No credit lost. Try again. Submit Previous Answers Request Answer P Pearson Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy I Permissions | Contact Us |

Part A Applying the Bohr model to a triply ionized beryllium atom (Be³+, Z = 4), find the shortest wavelength of the Lyman series for Be³+. Express your answer using four significant figures. ΠΫΠΙ ΑΣΦ λ = Submit Request Answer Part B |AE| = Applying the Bohr model to a triply ionized beryllium atom (Be³+, Z = 4), find the ionization energy required to remove the final electron in Be³+. Express your answer using three significant figures. 5 ΑΣΦ Submit ? Request Answer nm ? eV

Please help me with a,b,c questions please, well explained and detailed.

Part A Estimate the number of photons emitted by the Sun in a year. (Take the average wavelength to be 550 nm and the intensity of sunlight reaching the Earth (outer atmosphere) as 1350 W/m².) VE ΑΣΦ 3.74 10 ● Submit ? Previous Answers Request Answer photons/yr

The energy-level diagram for the atomic emission spectra of an unknown gas is presented in the diagram below. n = 4 4.0 ev n = 3 1.8 eV n = 2 1.5 ev n=1 O ev Part A Initially, electrons are only in the ground state (n=1). A beam of red light hits the gas. This beam is a continuous spectrum of red light (from 620 nm to 750 nm) How many absorption line/s will there be in the spectra? 1 Correct Part B Initially, electrons are only in the ground state (n=1). A beam of red light hits the gas. This beam is a continuous spectrum of red light (from 620 nm to 750 nm) Calculate the wavelength of the absorption line ? da = nm Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

The intensity of light reaching Earth is about 1400 W/m². Part A Determine the number of photons reaching a 1.0-m² area each second. Assume that the wavelength of the photons hitting the Earth is 520 nm. Express your answer in photons. N = Submit IVE ΑΣΦ Request Answer ? photons

In the photoelectric-effect experiment, as illustrated by the figure, a current is measured while light is shining on the cathode. But this does not appear to be a complete circuit, so how can there be a current? Explain.

Light with a wavelength of 550 nm illuminates a metallic surface with a work function of 1.10 eV.        a. What is the maximum speed of the photoelectron?      b. What is the minimum potential difference required to stop the electrons?          *I ask that the answer be written with clear and readable handwriting or typed*

Part A What is the energy range (in joules) of photons of wavelength 390 nm to 740 nm ? Express your answers using two significant figures separated by a comma. ? Emin. Emax = J Submit Request Answer Part B What is the energy range (in eV) of photons of wavelength 390 nm to 740 nm ? Express your answers using two significant figures separated by a comma. ? Emin. Emax = eV Submit Request Answer Provide Feedback

Electrons are emitted when a metal is illuminated by light with a wavelength less than 383 nm. Part A What is the metal's work function? ΜΕ ΑΣΦ E = Submit Request Answer Provide Feedback ? eV