chapter 27.1
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chapter 27.1
anyone understand how to do question # 3?
i've been trying # 3 for a while and im having no luck
i've been trying # 3 for a while and im having no luck
phyfrk Guest
Question 3
The answer to question 3 is
2.3*10^17.
Answer is neg.
The radius is constant and we use the equation
Density=Mass/Volume
So..
Density=(1.66e27)/((4pi/3)*(1.2e15)^3)
Gives us
2.3e17
This is constant no matter what Atomic Number is given in your problem.
2.3*10^17.
Answer is neg.
The radius is constant and we use the equation
Density=Mass/Volume
So..
Density=(1.66e27)/((4pi/3)*(1.2e15)^3)
Gives us
2.3e17
This is constant no matter what Atomic Number is given in your problem.
Guest 24 Guest
#2
Is something wrong with MapleTA acceptiing my answer?
Atomic mass unit = 221 (given)
(221)^1/3 * 1.2*10^15 = 7.25513*10^15
I don't know what I am doing wrong and Allen does not have the blog updated.
Atomic mass unit = 221 (given)
(221)^1/3 * 1.2*10^15 = 7.25513*10^15
I don't know what I am doing wrong and Allen does not have the blog updated.
super mo Guest
Question 1
Question 1:
A neutron (its mass=1.67x1027kg can be approximated as 1 u) makes an elastic headon collision with a nucleus which is at rest and has the atomic weight 4.443 u. Calculate the velocity of the recoiling nucleus as a multiple of the velocity of the incident neutron (sheet 4). Indicate with a positive (negative) sign whether the neutron and proton masses are about equal (very different from each other).
Use the equation v_2 = ((2*m_1)/(m_1+m_2))*v_1
Let the neutron mass = m_1
Nucleus mass = m_2
Plug into the equation and you end up with v_2 = ####*v_1
That number is your answer because they ask for the velocity of the nucleus as a multiple of the velocity
Answer is positive
A neutron (its mass=1.67x1027kg can be approximated as 1 u) makes an elastic headon collision with a nucleus which is at rest and has the atomic weight 4.443 u. Calculate the velocity of the recoiling nucleus as a multiple of the velocity of the incident neutron (sheet 4). Indicate with a positive (negative) sign whether the neutron and proton masses are about equal (very different from each other).
Use the equation v_2 = ((2*m_1)/(m_1+m_2))*v_1
Let the neutron mass = m_1
Nucleus mass = m_2
Plug into the equation and you end up with v_2 = ####*v_1
That number is your answer because they ask for the velocity of the nucleus as a multiple of the velocity
Answer is positive
KT Guest
Question 2
Question 2:
The Atomic Mass Number of a nucleus is 32. Calculate the nuclear radius in fm (sheet . Indicate with a positive (negative) sign whether the expression on sheet 8 implies that the nucleons compress or dip into each other (are considered incompressible and impenetrable).
Let A = 32
R_0 (constant) = 1.2E15
Use the formula r = R_0*A^(1/3)
You will get something like r=#.###E15 m
this answer is in meters but they want it in fm
To convert to fm, know that 10^15 meters = 1fm, so just divide your answer by 10^15 and you will get #.###
& the answer is negative
The Atomic Mass Number of a nucleus is 32. Calculate the nuclear radius in fm (sheet . Indicate with a positive (negative) sign whether the expression on sheet 8 implies that the nucleons compress or dip into each other (are considered incompressible and impenetrable).
Let A = 32
R_0 (constant) = 1.2E15
Use the formula r = R_0*A^(1/3)
You will get something like r=#.###E15 m
this answer is in meters but they want it in fm
To convert to fm, know that 10^15 meters = 1fm, so just divide your answer by 10^15 and you will get #.###
& the answer is negative
KT Guest
what is v_1 in #1?
In the formula provided for question 1, what does v_1 =?
And, we're solving for v_2, right?
And, we're solving for v_2, right?
question Guest
Re: chapter 27.1
For Question 1, v_1 is equal to the incident velocity, and yes youre solving for v_2. The question asks you to solve for v_2 as a multiple of v_1, so thats why you end up with v_2 = number*v_1
KT Guest
Re: chapter 27.1
can someone help me with #1
I can't figure it out
what do u multiply by at the end ??
I can't figure it out
what do u multiply by at the end ??
helpp Guest
#1
For # 1 you just have to convert every thing in u to kg... and then plug in the formula given above. you should get the asnwer
ps Guest
Question 3
I'm confused with Question 3 . Why is A=1? how come the radius is just the value of R_0 ?
an0n Guest
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