PHYSICS HIGH SCHOOL

Nuclear energy use can negatively impact water quality. Please select the best answer from the choices provideda. True
b. False

Answers

Answer 1
Answer: The correct answer is B. Nuclear energy use do not have a negative impact on water quality. Although, it might have an effect on life in water bodies. Nuclear power generation requires a lot of water for cooling and heating. Many power plants are situated near bodies of water because this is where they get their water for processing. They use screens in order to minimize entry of foreign materials and in these screens aquatic organisms might be trapped and killed.
Answer 2
Answer:

the correct answer is true.

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A neutral atom of uranium (U) has 146 neutrons and a mass number of 238. How many protons does it have?

Answers

Answer:

Explanation:

One

I've never heard of a mass defect before you asked this question. Interesting concept.

Givens

Number of neutrons =207 - 82 = 125

Number of protons =  82

The amu of a proton is 1.00728

The amu of a neutron is 1.00866

Solution

Find out the actual mass of the Lead atom

Actual mass = 82*1.00728 + 125*1.00866

Actual mass = 208.67946

The mass defect = 208.67946 - 207 = 1.67946

That is the proper way to calculate mass defect.

Apparently the way you are supposed to do it is

Mass defect = 208.67946 - 206.975897= 1.703563 which means that C is the closest answer. You will have to look at your notes to see if amu for protons and neutrons are what I used.

Two

The number of protons is the number of Uranium on the periodic table.

92 protons. 92 comes from the position on the periodic table.

You can get the same thing by Taking its relative mass (238) and subtracting the neutrons (146) which is 238 - 146 = 92

Answer:

92 protons

Explanation:

The mass number is 238, so the nucleus has  238  particles in total, including 146 neutrons.  So to calculate the number of neutrons we have to subtract:  238  −  146  =  92

If a 3 kg object has a momentum of 33 kg ms whats its velocity?

Answers


Momentum = (mass) x (speed)

  33 kg-m/s = (3 kg) x (speed)

Divide each side by  3 kg :

   (33 kg-m/s) / (3 kg) = speed

         11 m/s                = speed

(You asked for velocity, but didn't give us any information about the direction
in which the object is moving.  So we can only work with the speed.)

For Most Substances the distance between particles is smallest when the substancea.exists gas
b.exists as a liquid
c.exists as a crystalline solid
d.exists as an amorphous solid

Answers

I am pretty sure that for Most Substances the distance between particles is smallest when the substance c.exists as a crystalline solid. I pick this option because crystalline solid is the most compact substances unlike the others.
It will definitely help you.

Answer:

c.exists as a crystalline solid

Explanation:

Amongst all the three phases, it is solid phase which is the most compact because the atoms within the solids are bound with a very strong force of attraction. But, solids can exist as either crystalline solid or amorphous solid. Between these two type of solids, it is crystalline solids which are very well packed and the inter atomic distance between their two atoms is the least. It is due to the reason that the atoms within a crystalline solid are arranged in proper order in the form of stacks. But, in amorphous solids the atoms are not arranged properly i.e. their arrangement is random which leads to the increased inter atomic distance. Second comes liquid phase, in liquids the inter atomic forces are intermediate between solids and gases. Atoms in a gas are bound with the weakest force of attraction known as van der Waals that is why the distance between the atoms of a gas is the highest.

When two electron in a chemical bond are equally shared between two different atoms, what is the bond

Answers

When two electron in a chemical bond are equally shared between two different atoms, the bond is covalent bond.

What is covalent bond?

A chemical bond known as a covalent bond includes the exchanging of electrons between atoms to create electron pairs.

These electron couples are referred to as bonding pairs or sharing pairs. Covalent bonding is the stable equilibrium of attracting and repulsive forces that exists when two atoms share an electron.

The ability of each atom to reach the equivalent of a full valence shell, which corresponds to a stable electronic state, is made possible for many molecules by the sharing of electrons. Hence, when two electron in a chemical bond are equally shared between two different atoms, the bond is covalent bond.

Learn more about covalent bond here:

brainly.com/question/19382448

#SPJ6
When two electrons are equally shared between two atoms it is a molecular compound using a single non polar covalent bond.

Help fast please!!!!!A new solar system with two planets of equal mass - Planet X and Planet Y - is discovered. Planet X is closest to the sun.

What is the sun's gravitational pull on Planet Y as compared with Planet X?

A.
Because Planet Y is farther from the sun, the sun's gravitational pull on Planet Y is less than the sun's gravitational pull on Planet X.
B.
The sun's gravity repels Planet Y with more force than it repels Planet X, which is why Planet Y is farther away.
C.
Because Planet Y is farther from the sun, the sun's gravitational pull on Planet Y is more than the sun's gravitational pull on Planet X.
D.
The sun's gravitational pull on Planet Y is equal to its gravitational pull on Planet X because distance does not affect the sun's gravity.

Answers


We're told that the planets have EQUAL MASS.

If that's true, then the strength of the gravitational forces between
each planet and the star depends only on the distance between
them ... the farther a planet is from the star, the smaller the
gravitational forces are IF we're talking about planets with
equal masses.

Planet-X is closer to the star, and Planet-Y is farther from it. 
From this we know that the gravitational forces between the
star and Planet-X are greater, and the forces between the star
and Planet-Y are smaller.

'A' says this.

'B' is totally absurd, because it talks about gravity repelling things.

'C' says exactly the opposite for the two planets.

'D' says that distance doesn't matter.  We know this is absurd,
simply because we're never pulled toward Jupiter in our daily life.

Answer:

the answer is A

Hope tis helps:)

Explanation:

How are the three cell layers of an embryo related to its development?

Answers

The said development of the cell where the three cell layers help out do it is called as Gastrulation. The three layers - called as ectoderm, endoderm, and mesoderm - tend to form as this happens. This is a process that's present in all living things except sponges.
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