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Giambattista et al - Physics 2/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 18 / 20

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

Last Saved : n/a Saving...  ()

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Question
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1 2 3 4 5
–/3 –/1 –/7 –/7 –/2
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18/20 (90.0%)

  • Instructions

    Here are some textbook questions from Physics 2/e by Alan Giambattista, Betty M. Richardson, and Robert C. 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. –/3 points GRRPhys2 2.P.012. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/50 0/50 0/50
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–/3
 
A graph is plotted below of the vertical velocity component of an elevator versus time.
(a) How high is the elevator above the starting point (t=0) after 20 s have elapsed?
m

(b) When is the elevator at its highest location above the starting point? (Give the longest timespan that this occurs.)
Between and s
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2. –/1 points GRRPhys2 4.P.083. My Notes
Question Part
Points
Submissions Used
1
–/1
0/50
Total
–/1
 
Two blocks, masses m1 and m2, are connected by a massless cord as seen below. If the two blocks are pulled with a constant tension on a frictionless surface by applying a force of magnitude T2 to a second cord connected to m2, what is the ratio of the tensions in the two cords T1/T2 in terms of the masses? (Use the following as necessary: m1, and m2.)
T1
T2
 		=
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3. –/7 points GRRPhys2 11.P.030. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7
–/1 –/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50
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–/7
 
The drawing shows a snapshot of a transverse wave traveling along a string at 9.4 m/s. The equation for the wave is y(x, t) = A cos(ωt + kx).
(a) Is the wave moving to the right or to the left?


(b) What are the numerical values of A, ω, and k?
A  =  mm
ω  =  rad/s
k  =  rad/m

(c) At what times could this snapshot have been taken? (Give the three smallest nonnegative possibilities. Enter your answers from smallest to largest.)
ms
ms
ms
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4. –/7 points GRRPhys2 18.P.116. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7
–/1 –/1 –/1 –/1 –/1 –/1 –/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50
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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. Ignore 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.

Select the bulb(s) which is/are the dimmest.

Explain.

This answer has not been graded yet.



(c) Find the current through each bulb if the filament resistances are each 20.5 Ω and the emf is 7.8 V.
I1 = A
I2 = A
I3 = A
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5. –/2 points GRRPhys2 27.P.013. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
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–/2
 
Calculate the value of Planck's constant and the work function of the metal from the data obtained by Robert A. Millikan in 1916. Millikan was attempting to disprove the Einstein photoelectric equation; instead he found that his data supported Einstein's prediction.
h  J · s
ϕ eV
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