30. To solve the problem, we note that the first derivative of the function with respect to time gives the rate. Setting the rate to zero gives the time at which an extreme value of the variable mass occurs; here that extreme value is a maximum. (a) Diffe
HARVARD UNIVERSITY PHYSICS 11A, FALL 2007 PROBLEM SET 1
DUE SEPTEMBER 25, 2007
1. Reading Read chapters 1, 2 this week and 3, 4 next week. 2. Problems The following problems are found in Halliday, Resnick and Walker (8th ed.): Chapter 1. 30, 31 Chapter 2.
COM 114 Group Contract
Team: Oasis Team
Group Presentation Day: 05/12/2016
Group Topics (Problem + Solution):
We all know that the university encourage students to have different kind of organization to help. But
the problem is a lot of approved organizat
Stereotype means that some culture or some tradition, some activities just
belongs to some countries people or some nations. It is based on the
prosperity of one culture, and people will call this phenomenon as
stereotype.
It is interesting to talk some s
CONSTRUCTING AN
EXPLANATION
QUESTION OF THE DAY:
IN THE WORLD OF VIDEO GAMES, WHAT DOES NES STAND FOR?
AGENDA AND OBJECTIVES
Agenda
Parts of Simple Explanation
Activity: Creating a Simple Explanation
Framework Overview
Closing Announcements and Assign
Blank informatory vs. explanatory worksheet
News Presentation
Instructional
Explanatory
Persuasive
Topic
Beauty pageant
6%of beauty
pageant
How to participate
in pageant. What
you can seek from
the beauty pageant
What is Beauty
pageant
You can choose
beau
HARVARD UNIVERSITY PHYSICS 11A, FALL 2007 PROBLEM SET 11
DUE DECEMBER 18, 2007
1. Reading Read chapter 16 this week and chapter 17 next week. 2. Problems The following problems are found in Halliday, Resnick and Walker (8th ed.): Chapter 16. 10, 24, 30, 3
HARVARD UNIVERSITY PHYSICS 11A, FALL 2007 PROBLEM SET 10
DUE DECEMBER 11, 2007
1. Reading Read chapter 14 this week and chapter 15 next week. 2. Problems The following problems are found in Halliday, Resnick and Walker (8th ed.): Chapter 14. 20, 38, 48, 5
HARVARD UNIVERSITY PHYSICS 11A, FALL 2007 PROBLEM SET 9
DUE NOVEMBER 27, 2007
1. Reading Read chapter 13 this week. 2. Problems The following problems are found in Halliday, Resnick and Walker (8th ed.): Chapter 13. 14, 22, 26, 36, 40, 54, 56, 58, 76, 90
COM 114: Fundamentals of Speech Communication
Course Policy
Instructor: Ms. Elizabeth Hintz
Office: 2257 Beering Hall
Email: ehintz@purdue.edu
Office Hours:
-Tuesdays from 3:00 p.m. 5:00 p.m.
-Fridays from 10:30 a.m. 11:30 a.m
Welcome to COM 114! Im looki
Communication 114 Schedule
In the event of a major campus emergency, course requirements, deadlines
and grading percentages are subject to changes that may be necessitated
by a revised semester calendar or other circumstances. Here is that way to
get info
LIFE IN THE ARMY
1. Army 101
2. Component Choice
3. Branch Choice
4. Financial
5. Physical
6. Recreational
7. Social
8. Academic
9. Medical
10. Mental
11. Spiritual
Army 101
The Army has two main components
Institutional Army
Training centers, training
Topic Worksheet
Asynchronous (Narrated Powerpoint) Presentations
My topic for my how-to Asynchronous Presentation (the Narrated PowerPoint) is:
How to play guitar.
1.Getting to know the structure of guitar.
2. How to change the voice of the guitar
3. Reco
Note: Figure nct drawn tn scale.
Mech 3-.
A disk of mass M = 2.1] kg and radius R = 0. ll] m is supported by a rope cl" negligible mass, as shown above. The
rope is attached to the ceiling at one end and passes under the disk. The other end of the rope is
PH603 2014 2015 - PS #2
1.
An Atwood machine is constructed as shown above. The ramp is frictionless and the pulley is
massless and frictionless. The two boxes have equal masses. The incline is at an angle to the
horizontal.
a. Find the acceleration of th
HARVARD UNIVERSITY PHYSICS 11A, FALL 2007 PROBLEM SET 8
DUE NOVEMBER 20, 2007
1. Reading Read chapter 12 this week. 2. Problems The following problems are found in Halliday, Resnick and Walker (8th ed.): Chapter 12. 18, 20, 22, 24, 28, 30, 36, 42, 46, 50,
HARVARD UNIVERSITY PHYSICS 11A, FALL 2007 PROBLEM SET 7
DUE NOVEMBER 13, 2007
1. Reading Read chapter 11 this week. 2. Problems The following problems are found in Halliday, Resnick and Walker (8th ed.): Chapter 11. 22, 30, 42, 50, 52, 58, 64, 68, 72, 80
30. To solve the problem, we note that the first derivative of the function with respect to time gives the rate. Setting the rate to zero gives the time at which an extreme value of the variable mass occurs; here that extreme value is a maximum. (a) Diffe
22. The desired result is the displacement vector, in units of km, A = (5.6 km), 90 (measured counterclockwise from the +x axis), or A = (5.6 km)j , where is the unit j vector along the positive y axis (north). This consists of the sum of two displacement
4. We note that m a = (16 N) i + (12 N) j . With the other forces as specified in the problem, then Newtons second law gives the third force as i j F3 = m a F1 F2 =(34 N) ^ (12 N) ^.
^
^
32. We resolve this horizontal force into appropriate components.
46. We will start by assuming that the normal force (on the car from the rail) points up. Note that gravity points down, and the y axis is chosen positive upwards. Also, the direction to the center of the circle (the direction of centripetal acceleration)
8. We use Eq. 7-12 for Wg and Eq. 8-9 for U. (a) The displacement between the initial point and Q has a vertical component of h R downward (same direction as Fg ), so (with h = 5R) we obtain Wg = Fg d = 4mgR = 4(3.20 10 2 kg)(9.80 m/s 2 )(0.12 m) = 0.15 J
56. The total momentum immediately before the collision (with +x upward) is pi = (3.0 kg)(20 m/s) + (2.0 kg)( 12 m/s) = 36 kgm/s. Their momentum immediately after, when they constitute a combined mass of M = 5.0 kg, is pf = (5.0 kg) v . By conservation of
22. If we write r = x i + y j + z k, then (using Eq. 3-30) we find r F is equal to
d yF zF i i + bzF xF g j + d xF yF i k.
z y x z y x
(a) Here, r = r where r = 3.0i 2.0j + 4.0k, and F = F1 . Thus, dropping the prime in the above expression, we set (with
18. Our system consists of the lower arm holding a bowling ball. As shown in the free-body diagram, the forces on the lower arm consist of T from the biceps muscle, F from the bone of the upper arm, and the gravitational forces, mg and Mg . Since the syst
14. Using Eq. 13-1, we find FAB =
2GmA2 ^ d2 j
and
4GmA2 ^ FAC = 3d2 i .
Since the vector sum of all three forces must be zero, we find the third force (using magnitude-angle notation) is
GmA2 FAD = d2 (2.404 56.3) .
This tells us immediately the direct
20. To find the pressure at the brain of the pilot, we note that the inward acceleration can be treated from the pilots reference frame as though it is an outward gravitational acceleration against which the heart must push the blood. Thus, with a = 4 g ,