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Kirkpatrick & Francis - Physics: A World View 7/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 8 / 8

Due : Monday, January 28, 2030 00:00 EST

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5 6
2/2 2/2 1/1 1/1 1/1 1/1
Total
8/8 (100.0%)

  • Instructions

    Here are some textbook questions from Physics: A World View 7/e by Kirkpatrick and Francis published by Brooks/Cole Publishing. 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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For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

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1. 2/2 points  |  Previous Answers KF7 2.E.080. My Notes
Question Part
Points
Submissions Used
1 2
1/1 1/1
2/50 1/50
Total
2/2
 
A rock is dropped into an abandoned mine and a splash is heard 5 s later. Assuming that it takes a negligible time for the sound to travel up the mine shaft, determine the depth of the shaft and how fast the rock was falling when it hit the water.
depth of well Correct: Your answer is correct. m
velocity of rock Correct: Your answer is correct. m/s
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2. 2/2 points  |  Previous Answers KF7 4.E.054. My Notes
Question Part
Points
Submissions Used
1 2
1/1 1/1
2/50 2/50
Total
2/2
 
What is the change in velocity of a car that is initially traveling west at 43 km/h and then drives 115 km/h toward the north?
magnitude Correct: Your answer is correct. km/h
direction Correct: Your answer is correct. ° east of north
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3. 1/1 points  |  Previous Answers KF7 7.E.014. My Notes
Question Part
Points
Submissions Used
1
1/1
1/50
Total
1/1
 
A woman with a mass of 65 kg climbs a set of stairs that are h = 4 m high. How much gravitational potential energy does she gain?
Correct: Your answer is correct. J
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4. 1/1 points  |  Previous Answers KF7 16.E.074. My Notes
Question Part
Points
Submissions Used
1
1/1
1/50
Total
1/1
 
Your sonic range-finder measures the distance to a nearby building at 22 m. The range-finder is calibrated for sound traveling 343 m/s, but on this cold day the speed of sound is only 324 m/s. How far away is the building?
Correct: Your answer is correct. m
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5. 1/1 points  |  Previous Answers KF7 20.E.079. My Notes
Question Part
Points
Submissions Used
1
1/1
2/50
Total
1/1
 
What is the electric field magnitude midway between charges of Q1 = 4 C and Q2 = 14 C separated by 2 m?
Correct: Your answer is correct. N/C
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6. 1/1 points  |  Previous Answers KF7 27.MC.003. My Notes
Question Part
Points
Submissions Used
1
1/1
1/50
Total
1/1
 
The two photons produced in an electron-positron annihilation have equal but oppositely-directed momenta to match the zero momentum of the electron-positron pair. Which of the following conservation laws are obeyed in the pictured interaction?

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