WebAssign

Saturday, November 21, 2009 02:51 EST

Logged in as demo@demo

Logout

Halliday, Resnick, & Walker - Fund. of Physics 8/e (Homework)

James Finch

Physics - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 21/39

Due: Monday, October 4, 2010 19:00 EDT

About this Assignment

Question
Points
1 2 3 4 5 6 7 8 9
12/13 4 2/3 1 1/3 0/1 0/4 0/9 1
Total
21/39

Description

Fundamentals of Physics 8/e by Halliday, Resnick, and Walker published by John Wiley & Sons, Inc. is now a WebAssign Plus selection. WebAssignPLUS includes a complete on-line version of the text, the Student Study Guide, the Student Solution Manual, and a variety of interactive study aids. All of these rich resources are linked together in a dynamic and interactive environment for students. Additional links to the eBook within each problem are structured to support the way students work and provide them with superior just-in-time learning resources. Also the eBook availability provides students with a significantly less expensive option than the printed version.

Questions 1, 2, 5, 8, 9 are traditional end of chapter problems.

Question 3 is a simulation problem that uses and interactive simulation in which students can manipulate initial conditions and observe their calculations in action.

Question 4 and 6 are enhanced Go Tutorial problems. Go Tutorials use examples and figures, guiding students through steps to aid them in mastering the underlying concepts involved in the problem.

Question 7 is a question requiring an answer using algebraic expressions.

To see a demo of chapter 4 of the online book, click Home and select the Wiley Online Books class from the pulldown menu. If you adopt Halliday et al, your students will see an option to purchase the online book on their WebAssign Homepage.

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. 12/13 points All Submissions Notes Question: HRW8 1.P.008.
Question part
Points
Submissions
1 2 3 4 5 6 7 8 9 10 11 12 13
1 1 1 1 1 1 1 1 1 1 1 1 0/1
2/50 1/50 1/50 1/50 1/50 1/50 1/50 2/50 1/50 1/50 1/50 2/50 1/50
Total
12/13
 
You can easily convert common units and measures electronically, but you still should be able to use a conversion table, such as those in Appendix D. The table below is part of a conversion table for a system of volume measures once common in Spain; a volume of 1 fanega is equivalent to 55.501 dm3 (cubic decimeters).
(a) Complete this table.
cahiz fanega cuartilla almude medio
1 cahiz = 1 12 48 144 288
1 fanega =
Enter a number.
Your answer is correct.		 1 4 12 24
1 cuartilla =
Enter a number.
Your answer is correct.
Enter a number.
Your answer is correct.		 1 3 6
1 almude =
Enter a number.
Your answer is correct.
Enter a number.
Your answer is correct.
Enter a number.
Your answer is correct.		 1 2
1 medio =
Enter a number.
Your answer is correct.
Enter a number.
Your answer is correct.
Enter a number.
Your answer is correct.
Enter a number.
Your answer is correct.		 1

(b) Express 24.00 almude in terms of medio.
Enter a number.
Your answer is correct. medio

(c) Express this in cahiz.
Enter a number.
Your answer is correct. cahiz

(d) Express this in cubic centimeters (cm3).
Enter a number.
Your answer is incorrect. cm3


2. 4/4 points All Submissions Notes Question: HRW8 3.P.017.
Question part
Points
Submissions
1 2 3 4
1 1 1 1
1/50 2/50 1/50 1/50
Total
4/4
 
The two vectors and in the figure below have equal magnitudes of 8.0 m and their angles are 1 = 30° and 2 = 95°.
(a) Find the x and y components of their vector sum .
Enter a number.
Your answer is correct. +
Enter a number.
Your answer is correct.

(b) Find the magnitude of .
Enter a number.
Your answer is correct. m

(c) Find the angle makes with the positive x axis.
Enter a number.
Your answer is correct.°


3. 2/3 points All Submissions Notes Question: HRW8 4.SIM.002.
Question part
Points
Submissions
1 2 3
1 1 0/1
3/50 1/50 1/50
Total
2/3
 
Note: Use principles of physics to solve the problem and then verify your answer using the simulation.

If the range of the projectile is 4.02 m, the time-of-flight is T = 0.851 s, and air resistance is negligible, determine the following. (Assume that the acceleration due to gravity has a magnitude of g = 9.80 m/s2.)
(a) What is the launch angle of the projectile?
Enter a number.
Your answer is correct.°

(b) What is the initial speed of the projectile?
Enter a number.
Your answer is correct. m/s

(c) Express the maximum height reached by the projectile in terms of g and T (the time-of-flight).
Enter a mathematical expression.
Click here to preview your answer.Your answer is incorrect.
Click here for help with symbolic formatting.

4. 1/1 points All Submissions Notes Question: HRW8 4.P.013.
Question part
Points
Submissions
1
1
2/50
Total
1/1
 
The position r of a particle moving in an xy plane is given by
= (3.0t3 - 2.0t) + (6.0 - 2.0t4) with in meters and t in seconds. What is the angle between the positive direction of the x axis and a line tangent to the particle's path at t = 2.5 s?
Enter a number with units.
Your answer is correct.

GO Tutorial



5. 1/3 points All Submissions Notes Question: HRW8 4.P.030.
Question part
Points
Submissions
1 2 3
1 0/1 0/1
1/50 2/50 0/50
Total
1/3
 
A trebuchet was a hurling machine built to attack the walls of a castle under siege. A large stone could be hurled against a wall to break apart the wall. The machine was not placed near the wall because then arrows could reach it from the castle wall. Instead, it was positioned so that the stone hit the wall during the second half of its flight. Suppose a stone is launched with a speed of v0 = 33.0 m/s and at an angle of 0 = 44.4°.
(a) What is the speed of the stone if it hits the wall just as it reaches the top of its parabolic path?
Enter a number with units.
Your answer is correct.

(b) What is the speed of the stone if it hits the wall when it has descended to half that height?
Enter a number with units.
Your answer is incorrect.

(c) As a percentage, how much faster is it moving in part (b) than in part (a)?
Enter a number.
 %

6. 0/1 points All Submissions Notes Question: HRW8 4.P.054.
Question part
Points
Submissions
1
0/1
2/50
Total
0/1
 
At time t = 0, a projectile is launched from ground level. At t = 1.6 s, it is displaced d = 27.2 m horizontally and h = 41.3 m vertically above the launch point. At the instant it reaches its maximum height above ground level, what is its horizontal displacement D from the launch point?
Enter a number with units.
Your answer is incorrect.

GO Tutorial



7. 0/4 points All Submissions Notes Question: HRW8 4.SQ.040.
Question part
Points
Submissions
1 2 3 4
0/1 0/1 0/1 0/1
2/50 0/50 0/50 0/50
Total
0/4
 
A baseball leaves a pitcher's hand horizontally at a speed v. The distance to the batter is d. (Ignore the effect of air resistance, use g for the acceleration due to gravity.)
(a) How long does the ball take to travel the first half of that distance?
Enter a mathematical expression.
Click here to preview your answer.Your answer is incorrect.

(b) The second half?
Enter a mathematical expression.
Click here to preview your answer.

(c) How far does the ball fall freely during the first half?
Enter a mathematical expression.
Click here to preview your answer.

(d) During the second half?
Enter a mathematical expression.
Click here to preview your answer.

Click here for help with symbolic formatting.

8. –/9 points Notes Question: HRW8 15.P.076.
Question part
Points
Submissions
1 2 3 4 5 6 7 8 9
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
0/9
 
A particle executes linear SHM with frequency 0.31 Hz about the point x = 0. At t = 0, it has displacement x = 0.49 cm and zero velocity. Determine the following values for the motion. Use t for the time as appropriate.
(a) the period
Enter a number.
 s

(b) the angular frequency
Enter a number.
 rad/s

(c) the amplitude
Enter a number.
 cm

(d) the displacement x(t), using t for the time in seconds but not including any units
x(t) =
Enter a mathematical expression.
Click here to preview your answer. cm


(e) the velocity at time t, using t for the time in seconds but not including any units
v(t) =
Enter a mathematical expression.
Click here to preview your answer. cm/s
Click here for help with symbolic formatting.

(f) the maximum speed
Enter a number.
 cm/s

(g) the magnitude of the maximum acceleration
Enter a number.
 cm/s2

(h) the displacement at t = 3.0 s
Enter a number.
 cm

(i) the speed at t = 3.0 s
Enter a number.
 cm/s


9. 1/1 points All Submissions Notes Question: HRW8 16.CQ.011.
Question part
Points
Submissions
1
1
4/50
Total
1/1
 
Strings A and B have identical lengths and linear densities, but string B is under greater tension than is string A. The figure below shows four situations, (a) through (d), in which standing wave patterns exist on the two strings. In which situations is there the possibility that strings A and B are oscillating at the same resonant frequency?

Your answer is correct.



Home My Assignments