EP COSMIC PERSPECTIVE-MOD.MASTERING
9th Edition
ISBN: 9780137453481
Author: Bennett
Publisher: SAVVAS L
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Chapter S4, Problem 48EAP
To determine
The meaning of an electron.
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Use your own words and captured images for each question. Everything around us is made
up of different elements. The air has Oxygen and Nitrogen. Plants and people have lots of
Carbon. Helium is in balloons. Hydrogen is in water.
Open the 'Symbol' screen, then explore to develop your own ideas about how the atomic
particles determine the name of an atom or ion.
1. What determines the element?
2. Test your idea by identifying the element for the 3 cases. Insert captured images.
Table 3
example
Atom or Ion has
What Element is it?
# of protons: 6
# of neutrons: 6
1
# of electrons: 6
# of protons: 7
# of neutrons: 6
2
# of electrons: 6
# of protons: 6
3
# of neutrons: 7
# of electrons: 7
Use Max Planck's quantum theory to explain the following behaviour of photoelectrons.
a, Low-intensity light does not release any photoelectrons. What will happen if the light is made brighter? Explain your reasoning.
b, Low-intensity light releases photoelectrons. What will happen if the light is made brighter? Explain your reasoning.
c, Low-intensity light does not release any photoelectrons. What will happen if the frequency of the light is gradually increased? Explain your reasoning
1. Explain in a few sentences why you might be safe inside your new Volkswagen Beetle even when struck by a bolt of lightning.
2. For the Oil Drop experiment, derive a formula for the droplet’s charge given its density ρ and radius r. The two plates have a potential difference ΔV and plate separation d.Hint: What forces acting on the drop need to be balanced? Check the units on both sides of your derived equation.
3. How would your answer change if the droplets were assumed to be cubes (V=r3)?
Chapter S4 Solutions
EP COSMIC PERSPECTIVE-MOD.MASTERING
Ch. S4 - Prob. 1EAPCh. S4 - Prob. 2EAPCh. S4 - Prob. 3EAPCh. S4 - Prob. 4EAPCh. S4 - Prob. 5EAPCh. S4 - Prob. 6EAPCh. S4 - Prob. 7EAPCh. S4 - Prob. 8EAPCh. S4 - Prob. 9EAPCh. S4 - Prob. 10EAP
Ch. S4 - Prob. 11EAPCh. S4 - Prob. 12EAPCh. S4 - Prob. 13EAPCh. S4 - Prob. 14EAPCh. S4 - Prob. 15EAPCh. S4 - Prob. 16EAPCh. S4 - Prob. 17EAPCh. S4 - Prob. 18EAPCh. S4 - Prob. 19EAPCh. S4 - Decide whether the statement makes sense (or is...Ch. S4 - Prob. 21EAPCh. S4 - Prob. 22EAPCh. S4 - Prob. 23EAPCh. S4 - Prob. 24EAPCh. S4 - Prob. 25EAPCh. S4 - Prob. 26EAPCh. S4 - Prob. 27EAPCh. S4 - Choose the best answer to each of the following....Ch. S4 - Prob. 29EAPCh. S4 - Prob. 30EAPCh. S4 - Prob. 31EAPCh. S4 - Prob. 32EAPCh. S4 - Prob. 33EAPCh. S4 - Prob. 34EAPCh. S4 - Prob. 36EAPCh. S4 - Prob. 37EAPCh. S4 - Prob. 38EAPCh. S4 - Prob. 39EAPCh. S4 - Prob. 41EAPCh. S4 - Prob. 42EAPCh. S4 - Prob. 43EAPCh. S4 - Prob. 44EAPCh. S4 - Prob. 45EAPCh. S4 - Prob. 46EAPCh. S4 - Prob. 47EAPCh. S4 - Prob. 48EAPCh. S4 - Prob. 52EAPCh. S4 - Large-Scale Gravity. Suppose Earth and the Sun...Ch. S4 - Prob. 54EAPCh. S4 - Solar Mass Black Holes. Use the formula from...Ch. S4 - Long-Lived Black Holes. Some scientists speculate...Ch. S4 - Prob. 57EAPCh. S4 - Prob. 58EAPCh. S4 - Prob. 59EAPCh. S4 - Prob. 60EAP
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- Use Max Planck's quantum theory to explain the following behaviour of photoelectrons. a) Low-intensity light does not release any photoelectrons. What will happen if the light is made brighter? Explain your reasoning. b) Low-intensity light releases photoclectrons. What will happen if the light is made brighter? Explain your reasoning. c) Low-intensity light does not release any photoelectrons. What will happen if the frequency of the light is gradually increased? Explain your reasoning.arrow_forwardDirection: 1.Determine the number of electron,proton,and neutron in an atom, positive ions(cation)and negative ions(anion). 2. Draw the subatomic particles in proper location inside an atom/anion/cation. 3. Write your answer inside the box and use the symbol of electron, neutron and proton given below.arrow_forward1. How do electrons move? 2. How to create continuous flow of electron? 3. Draw the diagram and explain how a dry cell (1.5-volt battery) produces voltage. 4. How does a Van de Graaff Generator works? 5. Explain why “Danger! High Current!” is technically more precise than the common notion of the usual statement “Danger! High Voltage!” posted on different voltage sources.arrow_forward
- Udiscovery. Based on the text you read, what are the evidence showing that electrons can behave like waves? Write your answer on the space provided.arrow_forwardAn archaeon has 3.2 * 10 ^ 16 protons and a net charge of 2.6 pC? A. How many fewer electrons are there than protons? b . If you paired them up, what fraction of the protons would have no electrons?arrow_forwardWhat is critical temperature Tc ? Do all materials have a critical temperature? Explain why or why not.arrow_forward
- 1. The two very very large plates below are oppositely charged. Compare the electric energy of initial and final states and explain your answer. (Psst! Don't tell anyone else, but the explanation counts for more points than the answer.) Initial Final 2. A beam of protons is shot with an initial velocity of 2 x 106 m/s at a metal plate. This plate has an electric potential 10 kV higher than the proton beam source. The mass of a proton is 1.7 x 10-27 kg, and the charge of a proton is 1.6 x 10-19 C. What is the velocity of the protons just prior to striking the plate? (Hint: Tell me a physics story with pictures and diagrams before you plug all sorts of numbers into equations. You may use the back of this paper if you need to.) ©Modeling Workshop Project 2004 ++++++++++ | ++++++t+++]arrow_forwardPlasmas can occur naturally in the Universe or be manmade. i) In one or two sentences, say what you understand by the term “plasma”. ii) Give two examples each for naturally occurring and manmade plasmas. For each of your four chosen examples, state the typical electron density, electron temperature and degree of ionization.arrow_forwardI need explanations to each problem in more than three sentences 1. Why do electrons cross the gap in a vacuum tube? 2. Besides tungsten, what other materials are used for cathodes in vacuum tubes? 3. What is the advantage of directly heated cathodes? 4. How can a sheet of copper be made to emit electrons thermionically?arrow_forward
- 1. What is the expected charge to mass ratio for an electron based on the unknown values for the charge and mass of an electron? 2. Comment on the accuracy of your results. Does your results agree with the expected charge to mass ratio for an electronarrow_forward1. Why do you think electrons are the ones mostly transferred in the charging process? 2. What does it mean when an object's charge is quantized? 3. How does charging by conduction differ from charging by induction? 4. Is it possible for an object to have a lot of electrons but remain neutrally charge? Why or why not? 5. Why is the charge of proton or electron considered as the natural unit of charge?arrow_forwardTask 1: Use your own words and captured images for each question. Open the Atom' screen, then explore to develop your own ideas about the atomic particles that make up atoms and ions. 1. What particles go in the centre of the atom? What is the centre called? 2. Explore until you discover a good rule for making the centre of the atom stable. 3. What seems to make the centre of the atom unstable? 4. Fill in the table to identify three examples – at least 1 stable and at least 1 unstable – that shows your rules for stability work to “build an atom" of your own. Table 1 Capture and paste your atom Is it stable or unstable? What is in your What element is nucleus? it? 1 3 Taelt 1.arrow_forward
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