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Explanation:

Newton's second law is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.

Answer:

who know

Explanation:

Answer:

Plastic

Explanation

Found on google

Answer:

The net force is 0

Explanation:

because both people on either side are pulling the rope with the same force

Answer:

Hello. The answer is A (10)

Explanation:

If you memorize the periodic table it will be very easy to answer.

But if you don't know،

The solution is to count the electrons number

In an atom usually electrons number is equal with protons number

In this shape there are 10 electrons

So there are 10 protons in nucleus.

B. It represents the boundary between what is considered to be an  ionic or a covalent bond.

Electronegativity is the ability of atoms to attract electrons, especially in covalent bonds (sharing of electron pairs)

In a periodic system, electronegativity increases in a group, from bottom to top, and in a period from left to right.

From this difference in electronegativity, we can determine the ionic compound, polar or non-polar

Pauling determined the electronegativity scale (based on bond energies), between 0.7 - 4 (Fluorine has the highest number of electronegativities: 4)

Polar covalent compounds have a large electronegativity difference, while nonpolar compounds have a small electronegativity difference.

We can use the difference in electronegativity between the 2 bonded atoms to determine their polarity

Example

H = 2.1

O = 3.5

H₂O = 3.5-2.1 = 1.4 >> polar

= 3.5-3.5 = 0 >> non polar

Answer:

Molecular substances are made when two or more atoms join together by covalent bonds.

Explanation:

I hope this helps. I took the same class.

Answer:

The answer to this question is C; ultraviolet radiation

Explanation:

The the reason for this is because it carries more energy per photon than visible light does. Light travels at a speed of 299,792 kilometers per second (about 186,282 miles per second).

Answer:

A. Comparing trends or patterns that prove the hypothesis

Explanation:

Analyzing data involves comparing trends or patterns that prove the hypothesis. Sometimes, the trend might invalidate the hypothesis.

Answer:

Both are caused by heating and both are physical and chemicals.

Explanation:

The similarity between the two changes that have common things are

A. Both are caused by heating.

C. Both conserves mass.

D. Both are chemical changes.

The term “physical change” refers to a change in an object's appearance. When there is a change in the surroundings of the object, such as a rise in temperature or pressure, a physical change takes place.

When candles are burned, the wax melts, but as soon as the temperature drops, the wax hardens and solidifies once more.

Here, chemical changes happen because these changes can not be undone again. When a substance changes their appearance, they always have the same mass.

Thus, the correct options are A. Both are caused by heating, C. Both conserve mass, and D. Both are chemical changes.

To learn more about chemical and physical changes, refer to the link:

https://brainly.com/question/8632035

#SPJ2

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]

From the question

actual number = 1.30 g/mL

error = 1.40 - 1.30 = 0.1

We have

[tex]p(\%) = \frac{0.1}{1.3} \times 100 \\ = 7.692307...[/tex]

We have the final answer as

Hope this helps you

Answer: To calculate the atomic mass add up the mass of protons and neutrons.

I hope I helped!

Answer:

It is closer to 300 cm cubed

Explanation:

The volume of a coffee cup is closer to 300 cm cubed because their american volumes are around 10 ounces, and 10 ounces equals about 300 cm cubed. Hope it helps!

Answer:

i believe it's c

Explanation:

my reason is that if you look at the electrons 2 is the most comm

Answer:the dye is heavier than the water so the substances fuse together instead of sitting at the top much like the phenomenon  with oil and water combination

Have a good day!

Answer:

Explanation:

The kinetic energy of a body can be found by using the formula

[tex]KE = \frac{1}{2} m {v}^{2} \\ [/tex]

where

m is the mass

v is the velocity

From the question

m = 100 kg

v = 3 m/s

We have

[tex]KE = \frac{1}{2} \times 100 \times {3}^{2} \\ = 50 \times 9[/tex]

We have the final answer as

Hope this helps you

Answer:

30

Explanation:

Measure the water rised in the beaker which is 180 and subtract 150 and you get 30

Answer:

the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

Answer:

The atomic mass is the mass of an atom.

Explanation:

yes it isssss abcdefghijk

Answer:

It can be formed either through a process of evaporation or sublimation. Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form

Explanation:

hope it help

Answer:

No. Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form

Answer:

each principal energy level above the second contains, in addition to one s orbital and three p orbitals, a set of five d orbitals, called the d sublevel. The five d orbitals can hold up to 10 electrons. Thus, the third level holds a maximum of 18 electrons: 2 in the s orbital, 6 in the three p orbitals, and 10 in the five d orbitals.

Explanation:

Answer:

The statement which describes an intensive property of matter is - :

it is the same for every sample of a single substance.

Explanation:

Hence , the correct option is A (it is the same for every sample of a single substance).

Answer: the answer is  D im pretty sure

Explanation:

Answer:

A balloon

A bottle of soda

A rock

A water bottle

Explanation:

Answer:

162.7miles/hr

Explanation:

Given parameters:

Distance covered by the train  = 813.5miles

Time taken  = 5hours

Unknown:

Speed of the train  = ?

Solution:

Speed is a physical quantity.

It is mathematically expressed as;

      Speed  = [tex]\frac{distance}{time}[/tex]

So, input parameters and solve;

   Speed  = [tex]\frac{813.5}{5}[/tex]  = 162.7miles/hr

Answer:

directly proportional

Explanation:

have a good day

Answer:

Unbalanced is the answer