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Krauskopf and Beiser - The Physical Universe 10/e (Homework)

James Finch

Physical Science, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 7 / 10

Due : Thursday, October 31, 2019 18:00 EDT

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5
–/1 –/3 –/1 –/4 –/1
Total
7/10 (70.0%)

  • Instructions

    Here are some textbook questions from The Physical Universe 10/e by Krauskopf and Beiser published by McGraw-Hill. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice.

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1. –/1 points KBphys10 3.TB.021. My Notes
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A 100 kg astronaut ejects 1 g of gas from her propulsion pistol at a speed of 50 m/s. What is her recoil speed?
    
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2. –/3 points KBphys10 7.P.006. My Notes
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–/3
 
If 1 kg of radium (half-life = 1600 years) is sealed into a container; how much of it will remain as radium after 1400 years?
(No Response) kg
How much after 200 years?
(No Response) kg If the container is opened after a period of time, what gases would you expect to find inside it? (Assume only radium was initially present. Select all that apply.)

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3. –/1 points KBphys10 8.P.016. My Notes
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With the help of Fig. 8-16 find the frequency of the photon emitted when an electron in the n = 3 state of hydrogen falls into the n = 2 state.
(No Response) Hz

Figure 8-16
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4. –/4 points KBphys10 9.P.004. My Notes
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With the help of Tables 9-8 and 9-9 find the formulas of the following compounds. (Type your answer using the format CO2 for CO2 and (NH4)2CO3 for (NH4)2CO3.)
potassium phosphate
(No Response)
manganese(IV) oxide
(No Response)
tin(II) carbonate
(No Response)
copper(I) chloride
(No Response)
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5. –/1 points KBphys10 9.P.006. My Notes
Question Part
Points
Submissions Used
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–/1
 
Which of the following equations are balanced? (Select all that apply.)

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