PHYSICS MIDDLE SCHOOL

What do the atoms of elements in the same group have in common? A. They have the same atomic numbers. B. They have the same average atomic masses. C. They have the same number of electron shells. D. They have the same number of electrons in their outermost shells.

Answers

Answer 1

Answer:

Answer : The correct option is, (D) They have the same number of electrons in their outermost shells.

Explanation :

Periods : A row in the periodic table is known as periods.

The common features about the elements of a period are :

Each periods has elements with the same number of electron shells or energy levels or shell.

They transition from metal to noble gas that means they move from metal to non-metal and then non-metal to noble gas.

Groups : A column in the periodic table is known as groups.

The common features about the atoms of elements in a same group are :

Each groups has elements with the same number of valance electrons or have same of electrons in their outermost shells.

The elements in the same group have similar chemical properties.

The elements in the same group have similar physical properties.

Hence, the correct option is, (D) They have the same number of electrons in their outermost shells.

Answer 2

Answer: I think it's D . They have the same number of electrons in their outermost shells

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A narrow region between two air masses of different densities is a

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A front is a narrow region between two air masses of different densities.

Are temperature and thermal energy the same thing justify your answer

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Temperature is the measurement of the average energy of the particles in a solid, liquid or gas and thermal energy is the total energy in a set amount of solid, liquid or gas. Therefore, the temperature and thermal energy is not the same thing. They are both about the particle theory, which is a theory that all particles of solid, liquid or gas are always in motion. But the difference between the two is that temperature is the "measurement" of the particles in a solid, liquid or gas and the thermal energy is the total energy in a set amount of solid, liquid or gas.

HELP PLEASE Example: Convert 25°C to °F.

Formula: °F = (9/5) (°C) + 32  °C is given so I am solving for °F.
°F = (9/5) (25) + 32
=(1.8*25)+ 32
=45+32
=77
Answer= 77°F is equal to 25°C

A. Convert 35°C to °F

B. Convert 80°F to °C

C. Convert 15°C to °F

D. Convert 25°F to °C

Answers

Angel ! You have a formula, and you have an example that's
completely worked out. The ONLY POSSIBLE reason that you
could still need help is that you're letting math scare you.

I'll do 'A' for you, 'B' most of the way, and get 'C' set up.
If THAT's not enough for you to run with and finish them all,
then you and I should both be embarrassed.

Write the formula on the wall:

   °F = (9/5) °C + 32°

A). Convert 35° C °F = (9/5)(35°) + 32°

(9/5)(35) = 63 °F = 63° + 32°

   °F = 95°
____________________________________

B). Convert 80°F to °C
       The formula: °F = (9/5) °C + 32°

°F = 80    80 = (9/5)°C + 32

Subtract 32 from each side: 48 = (9/5)°C

Multiply each side by 5 : 240 = (9) C

Now you take over:
_________________________________________

C). Convert 15°C to °F.
       The formula: °F = (9/5) °C + 32°

°C = 15 °F = (9/5) 15° + 32

(9/5) (15) = 27
   Go !    °F =

Several objects were dropped from a balcony. Using the data below, determine which statements must be true regarding the rate of force of each falling object. Neglect (ignore) air resistance.Object

Mass

Diameter

Height of drop

Tennis Ball

0.06 kg

6.6 cm

5 m

Baseball

0.15 kg

74 cm

5 m

Bowling Ball

5 kg

21 cm

5 m

Golf Ball

0.04 kg

4.3 cm

5 m

Statement 1: All balls hit the ground at the same time

Statement 2: All balls hit the ground with different forces

Statement 3: The bowling ball hit the ground first and the tennis and golf ball hit the ground last

Statement 4: It is not possible to tell how much force each ball hit the ground with

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Answer:

statement 2

Explanation:

All hit at the same time

The rate at which work is done is

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Answer:

Power

Explanation:

I just took the quiz

The definition for Power = Work Done / Time taken

Hence the rate at which work is done is called Power.

Power is measured in Watts. Work done is measured in Joules and Time taken is in Seconds.

What's the Coulomb's law?

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In layman's term: like charges don't attract while opposite charges doelectrostatic forces between point A( which is charged) and point B (which is also charged) are proportional to the charge of point A and point B. there is also something else about this law that I don't quite remember.

___________________________________________________

Here is the formula:

F = k x Q1 x Q2/d^2

What the formula means:

F=force between charges

Q1 and Q2= amount of charge

d=distance between these two charges

k= Coulombs constant (proportionally constant)

________________________________________________

I think that about covers it and hopefully this helped.

Coulomb's law states that if you place two particles of respective charges $q_1,q_2$ at a distance $d$ from each other, one will exert the following force on the other :

$\vec{F}=k(q_1q_2)/(d^2)\vec{u}$ where $\vec{u}$ is a unit vector from the first charge to the other and $k$ is a positive constant.

A direct consequence of this is that two charges of same sign repel each other, while two charges of opposite signs attract each other.

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