1) An electron that is a certain distance from a proton is acted on by an electrical force.
a) If the electron were moved twice the distance away from the proton, would the
electrical force be:
1)
2)
3)
4)
2
4
F=(1/4)F
answer = 1/4
b) If the initial elect
Week Assignment 6 Quantum Mechanics of Atoms
PH221
2/10/16
Grantham University
1) What is the minimum uncertainty in the velocity of an electron that is known to be somewhere
between 0.050 nm and 0.10 nm from a proton?
= 6.626*10-34/ 4* 3.14 * 9.1*10-31*
Lab Assignment 5 Wave Function and it Probability
Lab Assignment 5 Wave Function and it Probability
PH221
2/16/16
Grantham University
1
Abstract
A wave function in quantum mechanics is a mathematical object that represents a particular
quantum state of a
1
7
PH221
2/24/16
Grantham University
Abstract
Radioactive decay, also known as nuclear decay or radioactivity, is the process by which a
nucleus of an unstable atom loses energy by emitting radiation. A material that spontaneously
emits such radiation wh
Physics 221
<NAME>
GID:
Week #8 Assignment
1) Complete the follow nuclear reactions:
37
S
16
B) 135 Te
52
52
A)
C) 4
1
D) 1 H
11
2) Consider the reaction
a) Use the masses of the nuclides involved to determine whether it is endogenic or exoergic.
(13.0034
Physics 221
<NAME>
GID: Gxxxxxxxx
Week #4 Assignment
1) An antenna is connected to a car battery. Will the antenna emit electromagnetic radiation? Why or why not?
Explain.
No, it is effectively and open circuit with no difference of potential, not to ment
Physics 221
<NAME>
GID: Gxxxxxxxx
Week #2 Assignment
1) How long would it take for a net charge of 2.5 C to pass a location in a wire if it is to carry a
steady current of 5.0 mA?
2.5/0.005=500
500 seconds
2) Two copper wires have equal lengths, but the d
Question 1
10 out of 10 points
Which of the equations here is valid for the circuit shown?
Selected Answer:
C.
-2 - I1 + 4 - 2I2 = 0
Correct Answer:
C.
-2 - I1 + 4 - 2I2 = 0
Question 2
Needs Grading
A long, straight wire carries a current of 2.5 A. Find
Physics 221
<NAME>
GID: Gxxxxxxxx
Week #1 Assignment
1) An electron that is a certain distance from a proton is acted on by an electrical force.
a) If the electron were moved twice the distance away from the proton, would the
electrical force be:
Force is
Physics 221
<NAME>
GID:
Week #7 Assignment
1) What is the approximate radius of 12/6C
1.2(1.2)1/3=1.275
r = ~1.275fm
2) What is the approximate radius of a 56/26Fe nucleus?
1.2(56)1/2= 8.87998
r = ~9.98fm
(b) Approximately what is the value of A for a nuc
Physics 221
<NAME>
GID: Gxxxxxxxx
Week #5 Assignment
1) The walls of a blackbody cavity are at a temperature of 27 o C. What is the frequency of the
radiation of maximum intensity?
27+273.16=300.16K
300000000*300.16 / 0.0029=3.105103448*10 13
f = 3.105104
Nuclear Reactors & Their Differences
Physics 221
<NAME>
GID:
Week #8 Essay (Lab)
PH221 Week 8 Lab
2
Nuclear Reactors and Their Differences
Despite all the power and fear that the word "nuclear" invokes, power plants that
depend on atomic energy don't oper
What are the three most common types of radioactive decays?
How do they differ?
Also how many types of decays are there?
Please describe them.
The three most common types of radioactive decay are Alpha, Beta, and Gamma. They were named for
the first three
PH221 Lab Answer Sheet
NAME:
Student #
e-mail: <youremail>@grantham.edu
Lab 1
Finally, calculate the net Coulomb force, Fc and direction, on the red object after 1.00 s; fill in the blanks on the Lab
Answer Sheet to be handed in at the end of this week.
F
Physics 221
<NAME>
GID: Gxxxxxxxx
Week #3 Assignment
1) If a charge particle moves in a straight line and there no other forces on it except
possibly from a magnetic field, can you say with certainty that no magnetic field is
present? Explain.
No, you can
Lab Assignment 4 Charged Object Moving
1
Lab Assignment 4 Charged Object Moving
PH221
2/2/16
Grantham University
Abstract
A positively charged particle is moving horizontally when it enters the region between the plates of a
capacitor as the simulation il
Data
Red to Blue
d = [(x2 x1)2+ (y2 y1)2]
d= [(3-5.709)+(0-2.553)]
d=3.722
Red to green
d = [(x2 x1)2+ (y2 y1)2]
d= [(2-5.709)+(2-2.553)]
d=3.75
Blue to green
d = [(x2 x1)2+ (y2 y1)2]
d= [(2-3)+(2-0)]
=(1+4) = d= 2.23
Force
F=(k)(Q1Q2/r)
Red to Blue
F= (9
Nuclear Physics
Richard Sheppard
Grantham University
1) R=R0A1/3=(1.2*10-15 m)*(12)1/3 = 2.75 fm or 2.75*10-15 m
2) R=R0A1/3=(1.2*10-15 m)*(56)1/3 = 4.6 fm or 4.6*10-15 m B) A=r = r0 A1/3 where r0 =
1.2fm. A=(r/r0 )3 = (3.0/1.2)3 = 15.625
3) (92*1.007825+
Nuclear Reactions
Richard Sheppard
Grantham University
1) A) 1637S
B) 52135Te
C) 4
D) 11H
2) A) Er =(M1+M2-SUM)c2 = -4.06 MeV, therefore the reaction is endogenic.
B) Threshold= ET=[(SUM+M1+M2)(SUM-M1-M2)/(2*M1)]c2 = 4.37714 MeV.
3) Threshold= ET=[(SUM+M1
Week 6 Assignment
Richard Sheppard
Grantham University
1) XV=h/4m= V=(6.626*10-34) / (4)(3.14)(9.1*10-31)(.05*10-9)= 1.16*106 m/s
2) ET=h/4=E=0.0003eV=T=(6.626*10-34) /(4)(3.14)(0.0003)(1.602x1019
)=1.1*10-12 s
3) h/2 = 6.6*10-34/2 = 1.055*10-34= E = h/ T
Physics PH221
Richard Sheppard
Grantham University
1) A. Columbs Law= F=k(Q1Q2)/r2) = Since the charge will not change, as well as k will
not change, I can set up a proportionality that looks like: F=r12/r22. Plugging in 1 for for
initial position and 2 f
Week 2 Assignment
Electric Current and Circuits
Richard Sheppard
Grantham University
1) Using formula T=V/I = 2.5C/5mA= 8.33 minutes
2) Resistance of a material is inversely proportional to the r2, therefore =r12/3r22 . Assuming
we set r=1, this makes our
Week 4 Assignment
Richard Sheppard
Grantham University
1) Batteries supply DC voltage, which when viewed on an oscilloscope will not produce an
actual frequency while antennas require AC to produce electromagnetic radiation. Not
only that, but only freque
Magnetism and Induction
Richard Sheppard
Grantham University
1) No. The charged particles would be affected if they were moving in a perpendicular
pattern to the magnetic field. If they were moving parallel to the field, then it would not
have an effect o
Week Assignment 4 Electromagnetic Waves and Light
PH221
2/1/16
Grantham University
1) An antenna is connected to a car battery. Will the antenna emit electromagnetic radiation? Why or why
not? Explain.
The antenna wont emit electromagnetic radiation becau
Lab Assignment 5 Critical Angle
1
Lab Assignment 5 Critical Angle
PH221
2/9/16
Grantham University
Abstract
Refraction is the bending of a wave when it enters a medium where its speed is different. The
refraction of light when it passes from a fast medium
Running head: Lab Assignment 1 Coulomb's Law
Lab Assignment 1 Coulomb's Law.
PH220
1/12/16
Grantham University
1
Abstract
In this simulation, the green, red, and blue charges are originally (i.e., at t = 0) at the vertices of
an isosceles triangle. The gr