Answer:
Explanation:
First Question
This question has to do with the mass defect in AMU.
It would get closer to the actual answer if I knew what mass of proton you are using and the mass of one neutron as well.
<u>Formula</u>
- Am = Z*m_h + (A - Z)*m_n - M
- Am is the mass defect
- Z is the atomic number (number of protons). 29
- m_h is the accepted mass of a proton. 1.0078
- A = Atomic Mass number 63
- m_n = mass of the neutron 1.0087
- M is the actual mass of the atom in question. 62.92958
<u>Solution</u>
Am = 29*1.0078 + (63 - 29)*1.0087 - 62.92958
Am = 0.59242 u The difference between what I get and D is that I don't exactly know what m_h and m_n are.
Second Question
The first step is to calculate the mass defect. Just use the formula above.
<u>Givens</u>
- Am = ?
- Z = 7
- A = 14
- m_h = 1.0078
- m_n = 1.0087
- M = 14.00307
Solution
Am = 7*1.0078 + (14 - 7)*1.0087 - 14.00307
Am=0.11243 u
1 u = 931.5 MeV
0.11243 u = x
x = 104.7285
This is more of a reading problem than a physics problem. They want the energy per nucleon, which is 14 (neutrons and protons).
E = 104.7285/14
E = 7.5 MeV
Answer
A
Answer:
0.05773 sec
Explanation:
We know that
time = distance/speed = d/V
for air
t1 = 117/355 = 0.3295 sec
for fresh water
t_2 = 117/1480 = 0.07905 sec
for metal
t_3 = 117/5490 = 0.02131 sec
So as we can see sound will reach through metal hand rail 1st, then through fresh water and then through air
1st = metal hand rail
2nd = fresh water
3rd = air
time difference between 1st and 2nd sound = t_2 - t_3 = 0.07905 - 0.02131 = 0.05773 sec
Answer:
Atmospheric pressure is commonly measured with a barometer. In a barometer, a column of mercury in a glass tube rises or falls as the weight of the atmosphere changes. Meteorologists describe the atmospheric pressure by how high the mercury rises.
Explanation:
Hope it helps you
have a nice day
Answer:
Explanation:
The change in potential is then defined as the negative of the work done by that force. ... You can't have work done by gravity AND a change in gravitational potential energy. You have to do it one way or the other. This means that the most important step in solving work-energy problems is choosing a system.
the phenomenon is An object that has potential energy can transfer that energy into kinetic energy when the object begins to move, due to its mass or position. For example, a person jumping on a trampoline has potential energy when they reach the peak of a jump, and their force changes direction from upward to downward.