I need help please!!!

The average speed of the family : 70 km/h

Given

time = 2 hour

distance = 140 km

Required

The average speed

Solution

Distance is the length traveled by an object within a certain time  

Average speed = total distance/total amount of time

Can be formulated :

 Avg speed = d : t

Total distance traveled : 140 km

Total time : 2 hr

Avg speed = 140 : 2 = 70 km/h

Answer:

the change in the system internal energy is 20 J

Explanation:

The computation of the change in the system internal energy is as follows:

Since the volume remains constant so the work done would be zero

Now the change in the internal energy is

= Heat given to system - work done

= 20 J - 0

= 20 J

hence, the change in the system internal energy is 20 J

The same is to be considered

Answer:

The answer is B

Explanation:

Protons and electrons have to be equal numbers for it to be neutral

Answer:b

Explanation:

Answer:

Likely the reason behind carrying them in liquid for is to condense them. liquid takes up far less space than gases do and will last far longer. they can be transformed back into gases through heating them back up. To keep them solid would require frigid temperatures but liquid will transfer more easily through space.

Answer: iceberg

Explanation: im pretty sure

Answer:

In space (Trust me)

The question is incomplete, the complete question is;

Ideally speaking, bonds tend to form between two particles such that they are separated by a distance where _______ net force is exerted on them, and their overall energy is _________.

A.zero, maximized

B. a negative, minimized

C. a positive, minimized

D. a positive, maximized

E. zero, minimized

F. a negative, maximized

Answer:

E. zero, minimized

Explanation:

Chemical bonding occurs when there is a dynamic equilibrium between the attractive and repulsive forces. This means  that the magnitudes of the attractive and repulsive forces are equal and the net force is zero.

Also, at the point where bonding occurs, the energy of the system is minimum. The point on the potential energy curve that represents the bonding energy is the lowest point on the curve.

Ideally speaking, bonds tend to form between two particles such that they

are separated by a distance where zero net force is exerted on them, and

their overall energy is minimized.

For chemical bonding to occur there must be dynamic equilibrium. This is

formed from  magnitude of the attractive and repulsive forces being equal

which translates to the net force being zero.

The overall energy at the exact point of bonding is at the minimum which is

to allow easy transfer or sharing of electrons in the formation of a compound.

Read more on https://brainly.com/question/18258856

Answer:

(H2O) and (O2) ??

Explanation:

I hope it helps...

Answer: 29.16%

Explanation:

The total of 2 percentages need to equal 100% so we subtract the percent they gave us from 100.

Answer:

C.

Explanation:

Answer:

differences

Any compound with a pH value between zero to seven is considered acidic, whereas a pH value between seven to fourteen is a base. An acid is called a proton donor, while a base is called a proton acceptor (Kolb, 1978).

examples are:

baking soda is basic (pH = 9.0).

Orange juice is mildly acidic (pH = approximately 3.5)

The environment in your stomach is highly acidic (pH = 1 to 2).

Explanation:

hope that helps.... thanks

Answer:

This is an oxidation-reduction (redox) reaction

Explanation:

P4

O2

Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04

Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04

Products:

P2O3

Names: Phosphorus trioxide source: wikipedia, accessed: 2019-09-27, Phosphorus(III) oxide source: wikipedia, accessed: 2019-09-27, Phosphorus sesquioxide source: wikipedia, accessed: 2019-09-27

Appearance: Colourless monoclinic crystals or liquid source: wikipedia, accessed: 2019-09-27

Answer:

Explanation:

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions

Answer:

g) 400 (h) 1331 (i) 11 (j) 20 (k) 13 (l) 15 ... (e) 1 , 2, 3, 6, 9, 18 (f) 1, 5, 25 (g) 1, 2, 4, 5, 8, 10, 20, 40. (h) 1, 2 ... 19. 70 x. (h) x. 6. (i). 9. 8 x. (j). 27. 24 x. (k). 5. 4. 20 a b. +. (l). 8. 3. 24 x y. +. (m).

Answer:

that's ur answer cumulus clouds I hope it helps

Answer:

2,3,6,1

2,3,6,1

Explanation:

The unbalanced reaction expression is given as:

  AlBr₃    +    K₂SO₄  →    KBr  + Al₂(SO₄)₃

We need to balanced this reaction equation. Our approach is a mathematical method where we assign variable a,b,c and d as the coefficients.

 aAlBr₃    +    bK₂SO₄  →    cKBr  + dAl₂(SO₄)₃

Conserving Al;  a  = 2d

                   Br:  3a  = c

                   K:   2b = c

                   S:   b  = 3d

                   O:  4b  = 12d

Let a  = 1, c = 3, d  = [tex]\frac{1}{2}[/tex]  b  = [tex]\frac{3}{2}[/tex]  

 Multiply through by 2 to give;

     a  = 2, b = 3, c = 6 and d  = 1

 2AlBr₃    +    3K₂SO₄  →    6KBr  + Al₂(SO₄)₃

Answer: 9.656332386078939e-21

Explanation:

The SI base unit for amount of substance is the mole. 1 grams H2O is equal to 0.055508435061792 mole. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between grams H2O and mole. Type in your own numbers in the form to convert the units

The atoms and molecules are matter. Therefore, option A and B are correct.

Matter is defined as anything that occupies space and has mass—in other words, the "stuff" of the universe. All matter is composed of substances known as elements, which have distinct chemical and physical properties and cannot be broken down into other substances via ordinary chemical reactions.

Matter is defined as anything that occupies space and has mass. Water and air are examples of matter, whereas feelings and sound are not.

Physical and chemical properties can be used to classify matter. Matter is defined as something that occupies space and has mass. Solid, liquid, and gaseous are the three states of matter. The conversion of a material from one state of matter to another without changing its chemical composition is referred to as a physical transition.

Thus, option A and B are correct.

To learn more about the matter, follow the link;

https://brainly.com/question/3764450

#SPJ2

Answer:

Explanation:

Joule is the unit of energy and work done.

It is a derived quantity because it is not a fundamental or basic unit.

A derived unit is formed by the combination of two or more fundamental quantities.

Since work done  = Force x distance

                           Force  = mass x acceleration

                          = mass x acceleration x distance

The unit then becomes kgm²/s²

So, 1joule  = 1kgm²/s²

Answer:

corona is increasing

.......

Explanation:

.....

Answer:

d

Explanation:

Answer: B. Mass number minus atomic number

Explanation: The atomic # is equal to the # of protons. The mass number is the total mass of neutrons & protons. You subtract the protons (atomic number) from the mass of the atom, the formula would be as shown:

Mass - Protons = Neutrons

An example is shown below

Element: Tin

Name shown on periodic table: Sn

Atomic #: 50

Mass # 118.711

118.711 - 50 = 68.711    <--- answer

Mass^     ^Protons/ Atomic #

I hope this helps :)

Answer:

Mg: 52.9%

Br: 47.1%

Explanation:

Answer:

Answer below:)

Explanation:

5.37 * 10^19 atoms of Iron (mol/6.022 *10^23)= 8.92 *10^-5

Answer:

Atomic Number: 27 (Co, Cobalt)

Explanation:

4s2 is before 3d7*