Homers big jump (compare to Textbook Problem 3.69)
In the episode Bart the Daredevil of The
Simpsons, Homer attempts to jump over
Springfield Gorge on Barts skateboard and fails.
Let us get a rough estimate of the initial speed
Homer would have needed in
Practice Problems: Projectile Motion
We neglect air resistance in all of the following problems.
Sprinkler (Textbook Problem 3.35, extended)
A sprinkler mounted on the ground sends out a jet of water at a 30 angle above the horizontal. The water
leaves th
4mm
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UM .
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eri M
A): :(o )JM - TU+J1 Axhbl : 41L '1' 0.23911 1 0.?(64
[324014 11.? m
[3) 4. AV
Ax:
13ro (Mia/Low)
_L_
I WW) (bury)
SLOW Law
Correction - "The monkey and the banana," part (4):
In the calculation of the time t, I forgot to take the square root. (A unit check would have alerted me of
this!) The correct answer is
s
t =
2 (12)
(9.8)
t =
1.565 s
x =
vi t
Then, for the minimum speed
Lab 6 -Sound Resonance
In Air Columns
Lab Section: Thurs 12-3 pm
Ziwei Xia
Partners: Owen Mckenzie and Timothy Wong
Date: 5.12.2016
Objective:
We observed the graph on screen to determine the
location where a node of the standing wave inside the air
is.
P
bee29400_ch11_600-689.indd Page 620
11/25/08
5:46:40 PM user-s173
/Volumes/204/MHDQ077/work%0/in
SAMPLE PROBLEM 11.4
A ball is thrown vertically upward from the 12-m level in an elevator shaft
with an initial velocity of 18 m/s. At the same instant an ope
Physics 132 M'idterm #1 - Fall 2015 - Klay 2
Q1 (15 points)
An experiment measures the temperature of 200 g of a substance While steadily applying
heat to it. The results are shown in the ﬁgure. m; 200 3 2: . 2K3
@ (b) What is the latent heat of vaporizat
Lab Report 7
Lens Lab
I.
II.
Find f (converging) using a distant light source
a. f = 20.8 cm #1
Converging Lens (light at zero)
S
S'
f
1/S (1/cm)
1/S' (1/cm)
30 cm
54.6 cm
19.36 cm
0.0333
0.0183
40 cm
37.6 cm
19.38 cm
0.0250
0.0266
50 cm
31.7 cm
19.40 cm
Lab 5 Interference and Diffraction of Light
OBJECTIVE
In this experiment I observed the patterns formed by laser light after passing through different
types of openings.
DATA
Known should be near 632.8 nm
SINGLE SLIT
a = .04 mm = .00004 m
y = (central max
Lab Report 8
Temperature and Thermometers Lab
OBJECTIVE
By calibrating the output of a thermometric system, I ultimately built a thermometer. The
system is a sealed container (bulb) of air at fixed volume. The output is the pressure of the gas in the
cont
Lab Report 9
Specific Heat Lab
I.
Objective
a. In this experiment the objective is to combine materials at different temperatures and
wait until the mixture reaches a final common temperature at thermal equilibrium.
Using the formulas Q = mcT and Qi = 0,
Lab Report 2
17 April 2015
Lab Report 2 Springs
Hanger
Hanger + .05 kg
Hanger + .10 kg
Hanger + .15 kg
Hanger + .20 kg
Hanger + .25 kg
Mass
.0466 kg
.0966 kg
.1466 kg
.1966 kg
.2466 kg
.2966 kg
x
F=mg
.05 m
.101 m
.158 m
.219 m
.28 m
.339 m
0.457
0.947
1.
Lab Report 4 Standing Waves in Air
OBJECTIVE
In this experiment I set up resonant standing wave vibrations in an air column. A speaker
emitting sound at a fixed frequency was placed near the air column and the column length was adjusted.
Standing waves we
Lab 3 Report
Experiment Date: October 9, 2015
Measurement of magnitudes and directions of electric fields produced by a dipole
Introduction and theory: It is known by the Pythagorean Theorem that the magnitude of an
electric field can be calculated. The f
Lab 8 Report
Experiment Date: November 13, 2015
Measurement of Earths magnetic field and the field of a circular coil of wire with current
Introduction and theory: Derived from the Biot-Savart law, the magnetic field at the center of a
circular coil of wi
Lecture Focus Questions 1-5
1. What are the goals of string theory?
a. Resolution of Conflict between GR and QM
i. Possible technological applications
ii. Better understand black holes
iii. Better understand the early universe
b. The theory of everything
08/18/2011
Metric System
Uses bases of 10
Three fundamental units
Time: sec
Length: meter
Mass: kilograms
Prefixes:
Pico x10 -12
Nano x10 -9
Micro x10 -6
Milli x10 -3
Centi x10 -2
Deci x10 -1
Meter
Kilo x10 3
Mega x10 6
Giga x10 9
Terra x10
Homework Problems:
Note: Many of the problem numbers in the 2nd and 3rd editions of the textbook are the
same. In cases where they differ, the 2nd edition problem number is also shown in (bold).
E.g., In Ch 11, Problem 53 in the 3rd edition corresponds to
PHYSICS EXPERIMENTS 122
2-1
Experiment 2
Temperature & Thermometers
Warning: Liquid nitrogen may be
used. University regulations require
students to have splash proof safety
goggles, long pants, and closed toe
shoes.
In this experiment you build a thermo
11
USING ENERGY
Problems
P11.2. Prepare: Use the definition of efficiency in Equation 11.2 where e is given as 60% and the electrical
energy is 600 J.
Solve: (a)
electric energy
= 0.60
chemical energy
Solve this for chemical energy and plug in the values.
31.4. Model: Assume ideal connecting wires and an ideal battery for which
Visualize: Please refer to Figure EX31.4. We will choose a clockwise direction for I. Note that the choice of the
currents direction is arbitrary because, with two batteries, we may
28.2. Model: The mechanical energy of the electron is conserved. A parallel-plate capacitor has a uniform
electric field.
Visualize:
The figure shows the before-and-after pictorial representation. The electron has an initial speed
vi 0 m/s
and a
final spe
32.4. Model: The magnetic field is that of a moving charged particle.
Visualize:
The first point is on the x-axis, with
is in the yz plane with
a 90.
The second point is on the z-axis, with
b 0,
and the third point
c 45.
Solve: (a) Using the Biot-Savart l
33.1. Visualize:
To develop a motional emf the magnetic field needs to be perpendicular to both the velocity and the current, so
lets say its direction is into the page.
Solve: This is a straightforward use of Equation 33.3. We have
Assess: This is about
29.5. Solve: The work done is exactly equal to the increase in the potential energy of the charge. That is,
W U qV q(Vf Vi ) (10 106 C)(15 V) 15 106 J
Assess: The work done by the escalator on the charge is stored as electric potential energy of the charg
26.4. Model: The electric field at the point is found by superposition of the fields due to the two charges
located on the y-axis.
q
q.
Visualize: The electric field due to the positive charge 1 at the point is away from 1 On the other hand, the
q
q.
elec
25.3. Model: Use the charge model and the model of a conductor as a material through which electrons move.
Solve: (a) The charge of the glass rod decreases from +12 nC to +8.0 nC. Because it is the electrons that are
transferred, 4.0 nC of electrons has b
27.8. Model: The electric flux flows out of a closed surface around a region of space containing a net
positive charge and into a closed surface surrounding a net negative charge.
Visualize: Please refer to Figure EX27.8. Let A be the area of each of the