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

James Finch

Physical Science, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 0/10

Due: Sunday, October 31, 2010 18:00 EDT

About this Assignment

Question
Points
1 2 3 4 5
0/1 0/3 0/1 0/4 0/1
Total
0/10

Description

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.


Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.



1. –/1 points Notes Question: KBphys10 3.TB.021.
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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?
    



2. –/3 points Notes Question: KBphys10 7.P.006.
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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?
Enter a number.
 kg
How much after 200 years?
Enter a number.
 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.)




3. –/1 points Notes Question: KBphys10 8.P.016.
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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.
Enter a number.
 Hz


Figure 8-16



4. –/4 points Notes Question: KBphys10 9.P.004.
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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
Answer is case sensitive.

manganese(IV) oxide
Answer is case sensitive.

tin(II) carbonate
Answer is case sensitive.

copper(I) chloride
Answer is case sensitive.


5. –/1 points Notes Question: KBphys10 9.P.006.
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Which of the following equations are balanced? (Select all that apply.)



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