1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
harina [27]
3 years ago
15

Uranium-238 (U238) has three more neutrons than uranium-235 (U235). Compared to the speed of sound in a bar of U235, is the spee

d of sound in a bar of U238 higher, lower, or the same? There are several factors that play a role.
(a) Chemically, the atoms of these two isotopes behave in essentially identical ways, since the number of protons (92) is identical and the clouds of 92 electrons are nearly identical. The interatomic distance, and the effective "stiffness" of the interatomic bond, both depend on the chemical properties of the atoms. Therefore, which of the following statements are true?
A) The effective stiffness of the interatomic "spring" is the same in the two isotopes, since this "spring" is a model for the interactions of the outer electrons, which are the same for different isotopes of the same atom.
B) An atom with more mass in the nucleus is bigger, so the distance between neighboring atoms is larger.
C) The interatomic distance is the same for the two isotopes, because it depends on the size of the electron cloud, not the nuclear mass.
D) The effective stiffness of the interatomic "spring" is greater for U238 because the mass is greater.
Physics
1 answer:
natta225 [31]3 years ago
7 0

Answer:

The correct  answers to then question are

A and B

Explanation:

As highlighted, the atoms of the two isotopes are chemically identical and they have similar characteristics due to the presence of equal number of protons  and electrons (92 each). Therefore factors influenced by the chemistry of the atoms of the isotopes such as the distance between atoms and the stiffness of the inter-atomic spring is identical for both  U_{235} and  U_{238}

An analogy of the spring constant and the inter-atomic distance is to consider the atoms of the metal to be interconnected by elastic material and as such the stiffness of the elastic material and the inter-atomic distance are determined by surface factors occurring on the surface

You might be interested in
Photosynthesis uses solar energy and converts it to what type of energy
Anni [7]
Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water.
7 0
3 years ago
All of the members of a community belong to the same species tf
Anna35 [415]
That is false

I hope this helps!
3 0
3 years ago
In the doorknob shown above, when the handle is rotated a distance of 189 millimeters, the spindle is rotated a distance of 27 m
Alisiya [41]

If my math is right its A) 7

because 189 divided by 27 is 7

7 0
3 years ago
Read 2 more answers
Consider the four quantum numbers of an electron in an atom, n, l, ml, and ms. The energy of an electron in an isolated atom dep
Effectus [21]

Answer:

The energy of an electron in an isolated atom depends on b. n only.

Explanation:

The quantum number n, known as the principal quantum number represents the relative overall energy of each orbital.

The sets of orbitals with the same n value are often referred to as an electron shell, in an isolated atom all electrons in a subshell have exactly the same level of energy.

The principal quantum number comes from the solution of the Schrödinger wave equation, which describes energy in eigenstates E_n, and for the case of an hydrogen atom we have:

E_n=-\cfrac{13.6}{n^2}\, eV

Thus for each value of n we can describe the orbital and the energy corresponding to each electron on such orbital.

6 0
3 years ago
A piece of tape is pulled from a spool and lowered toward a 120-mg scrap of paper. Only when the tape comes within 8.0 mm is the
Anton [14]

Answer:

1.176\times 10^{-3} N

Upward

Explanation:

We are given that

Mass of scarp paper,m=120 mg=120\times 10^{-6}kg

1mg=10^{-6} mkg

Distance,d =8 mm=8\times 10^{-3} m

Magnitude of electric force =F_E= w=mg

Where g=9.8 m/s^2

Substitute the values

F_E=120\times 10^{-6}\times 9.8

F_E=1.176\times 10^{-3} N

Gravitational force act in  downward direction.

The electric force acts in opposite direction and magnitude of electric force is equal to gravitational force.

Hence, the direction of electric force is upward.

6 0
3 years ago
Other questions:
  • Moving your finger across a textured surface can produce vibrations that are interpreted as texture. these vibrations are define
    6·1 answer
  • As gravity continues to crush the inner core, the fusion of carbon and oxygen begins. What temperature is needed for the fusion
    9·1 answer
  • At 20 degrees C, how much sodium chloride could be dissolved into 2 L of water?
    5·1 answer
  • In order to walk barefoot on hot coals without hurting your feet
    8·1 answer
  • a lemon with mass 0.3 kg falls out of a tree from a height of 1.8 m. How much mechanical energy does the lemon have just before
    12·2 answers
  • What statement about the greenhouse effect is not true?
    15·1 answer
  • How would a scientist describe a flying Hamster?
    14·2 answers
  • A device known as an optical resonator is used in lasers. An optical resonator consists of an arrangement of mirrors that reflec
    6·1 answer
  • State Ohms law o derive relation between<br>Vel and R Draw the graph between<br>vanda​
    6·1 answer
  • Why is blood in the right atrium low in oxygen
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!