Conceptual Questions
1. The maximum distance possible number of individual measurements per second
if the distance turns out to be 1.50m and the velocity of the ultrasound waves is
equal to 344 m/s is 114.7 pulses per second.
Velocity: 344m/s
Distance: 1.
Conceptual Questions:
1. Yes, you would be able to tell if the elevator was moving upward or downward
based on looking at the scale. This is due to the weight on the scale reflecting the
acceleration the elevator initially has when it goes from resting to
Conceptual Questions:
1. The projectile has a maximum speed at two points, while it only has one point
when the speed at a minimum. The first point where the projectile reaches a
maximum speed occurs at the beginning of the motion, just as the motions
ini
(10.4) The cavity has R1 = R2 E R = 0.999, and the nesse is therefore found
from eqn 10.3 to be
_ aw/4 _ m/R
T 1 x/R2 T 1 R
Having found 7:, we can use the result of Exercise 10.1 to nd the cavity
Q. In this exercise we have n = 1, LCav 2 0.01m, and A = 5
Phys463.nb
49
7
Energy Bands
Ref: textbook, Chapter 7
Q: Why are there insulators and conductors?
Q: What will happen when an electron moves in a crystal?
In the previous chapter, we discussed free electron gases, where we made three approximations
Ignor
Hyunjung Lee/Abby Perez
lee1583@purdue.edu
Physics 220 Lab Friday 11:30a.m.
Uday Sood
Conceptual Questions
1. 344m/s2(1.5m) = 114.6 measurements, rounded up would be 115 measurements. The distance would be multiplied by 2 because its the distance that it
Hyunjung Lee/Abby Perez
Physics 220 Lab Friday 11:30a.m.
Uday Sood
Conceptual Questions
1. The maximum speed of the ball will be at the time of launch and at the time of landing. The
minimum speed will be at the top of the parabola since the objects veloc
Hyunjung Lee/Abby Perez
Physic 220 11:30a.m.
Uday Sood
Conceptual Questions
1. There would be a bigger centripetal acceleration in point B.
If the r and velocity were both equal to 1:
Point A would have a=1^2/1=1m/s^2 and point B would have a=1^2/0.5=2m/s
Answers to Conceptual Questions
1. The magnetic force acting on each pole of the magnet will be F = m B, where 'm' is the
pole strength and B is the strength of magnetic field. Due to the uniform magnetic field;
the bar magnet experiences a moment couple
Answers to Conceptual Questions
1. As the magnet is initially very far away; the initial magnetic flux in the coil is zero and as
it passes through and reaches its final position very far away again the magnetic flux
through the coil will be zero. The net
Answers to Conceptual Questions:
1. Sound could diffract because diffractionoccurswhenawaveencountersanobstacleorslit
suchasadooropening.Thesizeoftheobstacleorslitmustbecomparabletothe
wavelengthofthewaveforittobendaroundtheobstacle.So,soundwaveswilldiffr
Answers to Conceptual Questions:
1. No it is not possible to polarize sound waves. It is impossible to polarize sound waves
because sound waves are not transverse waves like electromagnetic waves. The reason
electromagnetic waves can be polarized is becau
Answers to Conceptual Questions:
1. In order to reduce the focal length of a converging lens you would have to change some things.
You could combine the converging lens with a second converging lens and the combined focal
length would be smaller because i
Answers to Conceptual Questions:
1. If we assume the concept that one photon knocks out one electron only then, the
number of electron emitted should only depend on the intensity of the radiation
absorbed and it should not depend on the frequency once the
Answers to Conceptual Questions
1. When the switch is open the circuit is a simple circuit with two light bulbs in series with
some unknown resistance. No current will run through the branch where the switch is
open and both bulbs A and B will have the sa
Clase 07
IES 424 Macroeconoma
Comercio internacional
Economas abiertas al comercio internacional
No todo lo que se produce puede ser objeto de comercio
internacional
Balanza de pagos
Registra
todas
las
transacciones entre una
economa y el resto del
mundo
Conceptual Questions:
1. It is possible to determine if the elevator is moving upward or downward by
looking at the scale while the elevator is in motion. Weight is calculated by
multiplying mass and gravitational acceleration. When the elevator is at res
Conceptual Questions:
1. Tuning a guitar strengthens the frequency of vibrations. This occurs because
tuning involves the guitar string tightening, making a shorter distance for the
wave to travel. Since frequency and length are inversely related to one a
Kirsten Westerhouse and Heather Fritzen
Lab 1
Conceptual Questions
1. (344 m/s) / (2*1.50m) = 114 measurements/sec
2. The device that would provide better average results is the one with very
good accuracy but poor precision. This is because accuracy is a
1. Let the charge on A = Q Coulomb and d the distance between the charges in
m.
Charge on B = 2Q
The electrostatic force between them is given by F= (1/ 4) Q1x Q2/ d^2 =
9x10^9( Qx2Q)/d^2 Newton.
From this equation we can deduce that the force is mutual a
1. The resistors in parallel have the smaller net resistance. It will be 4 times
smaller. For resistors in series, the total resistance R is given by the equation
Rtotal= R1 + R2 +R3+ if the resistance of each resistor is 5 ohms, then the
total resistance
Exam
Name_
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
1)
A Carnot engine is operated as an air conditioner to cool a house in the summer. The
air conditioner removes 14 kJ of heat per second from the house, an
15) An
electron enters a magnetic field of 0.69 T with a velocity perpendicular to the
direction of the field. At what frequency does the electron traverse a circular path?
(The mass of an electron is 9.1 10-31 kg, and the charge of an electron is
1.6 10-
Figure 17.25
63) In
Figure 17.25, a conducting sphere of radius r1 = 0.050 m is placed at the
center of a spherical conducting shell of inner radius r2 = 0.100 m and outer
radius r3 = 0.140 m. The inner sphere carries a charge of -4.0 x 10-9 C. The
outer
Figure 23.6
43) In
Figure 23.6, the orientation of the transmission axis for each of three polarizing
sheets is labeled relative to the vertical direction. A beam of light, polarized in the
vertical direction, is incident on the first polarized with an in