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Giambattista et al - College Physics 2/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 0 / 25

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

Last Saved : n/a Saving...  ()

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    Here are some textbook questions from College Physics 2/e by Giambattista, Richardson, and Richardson 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. 0/2 points  |  Previous Answers GRR2 1.P.071. My Notes
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Submissions Used
1 2
0/1 0/1
2/50 2/50
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0/2
 
Suppose you have a pair of magic boots that enable you to stride along a distance of 6.2 leagues with each step. (1 league = 3 miles = 4.8 km. Assume that the mean radius of the Earth is 6.371 ✕ 106 m.)
(a) If you march along at a military march pace of 120 paces/minute, what will be your speed in km/h?
Incorrect: Your answer is incorrect. km/h

(b) Assuming you could march on top of the oceans when you step off the continents, how long (in minutes) will it take you to march around the Earth at the equator?
Incorrect: Your answer is incorrect. min
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2. –/6 points GRR2 4.P.011. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
–/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50
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–/6
 
A 8.9 kg watermelon and a 7.9 kg pumpkin are attached to each other via a cord that wraps over a pulley, as shown. Friction is negligible everywhere in this system.
(a) Find the accelerations of the pumpkin and the watermelon. Specify magnitude and direction.
pumpkin m/s2  
watermelon m/s2  

(b) If the system is released from rest, how far along the incline will the pumpkin travel in 0.30 s?
cm

(c) What is the speed of the watermelon after 0.20 s?
cm/s
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3. –/7 points GRR2 18.P.110. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7
–/1 –/1 –/1 –/1 –/1 –/1 –/1
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–/7
 
Three identical lightbulbs are connected with wires to an ideal battery. The two terminals on each socket connect to the two terminals of its lightbulb. Wires do not connect with one another where they appear to cross in the picture. Neglect the change of the resistances of the filaments due to temperature changes.
(a) Select all of the schematic circuit diagrams above which correctly represent the circuit.

(b) Select the bulb(s) which is/are the brightest and the bulb(s) which is/are the dimmest.
brightestdimmest


Explain.

This answer has not been graded yet.


(c) Find the current through each bulb if the filament resistances are each 25.0 and the emf is 6.0 V.
A (bulb 1)
A (bulb 2)
A (bulb 3)
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4. –/2 points GRR2 19.P.024. My Notes
Question Part
Points
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1 2
–/1 –/1
0/50 0/50
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–/2
 
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. The ions all have the same charge and are accelerated through the same potential difference before entering the magnetic field. The beryllium and aluminum lines are separated by 2.300 cm on the photographic plate, and the unknown element makes a line between them that is 0.332 cm from the beryllium line.
(a) What is the mass of the unknown element?
u
(b) Identify the element, using its chemical symbol. (Note that there may be more than one correct answer.)
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5. –/8 points GRR2 20.P.004. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8
–/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
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–/8
 
In the figure below, determine the magnitude (in terms of v, L, R, and B) and direction (CW or CCW) of the current I for the following directions of the magnetic field B.
direction of Bmagnitude of Idirection
of I
(a) into the page Click here to preview your answer.
(b) to the right (in the plane of the page) Click here to preview your answer.
(c) up (in the plane of the page) Click here to preview your answer.
(d) such that it has components both
out of the page and to the right, with a
16.0° angle between the field and the
plane of the page		 Click here to preview your answer.
Click here for help with symbolic formatting.
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