A hockey player is wearing ice skates and pushes against the wall propelling her backward on the ice. According to Newton's third law of motion, which of the following best compares the forces acting between the wall and the hockey player?
A.
The forces are equal and applied against gravity.
B.
The forces are equal and applied in the opposite direction.
C.
The forces are different sizes and applied in the opposite direction.
D.
The forces are equal and applied in the same direction.

Answers

Answer 1

Answer:

The forces are equal and applied in the opposite direction

Explanation:

Study island 100


Related Questions

Let's say you asked how many moles of O2
are needed to react with 24 moles of C2H6.

Answers

Answer:

7

Explanation:

How many moles are in
.77 liters of Br2 at STP?

Answers

Answer: 0.034354

Explanation:1 mole=22.4 liters of Br2 at STP so, 22.4x=0.77

x= 0.034354

Answer:

0.034354

Explanation:

Just did worksheet

please helpp me i really need help​

Answers

Answer:

second box is 2 C, third box is 3 C, and the last box is 3 C.

Explanation:

5 minutes. 2 degree change
10 minutes. 5 degree change
20 minutes. 8 degree change

Question 10 of 25
Consider this reaction:
Mg(s) + 2H2O(1) ► Mg(OH)2(s) + H2(g)
What is the oxidation state of Mg in Mg(OH)2(s)?
A. +2
B. - 2
C. +1
D. 0

Answers

The oxidation number of Mg in Mg(OH)₂ is +2.

Hence, Option A is correct answer.

What is oxidation number?

The oxidation state, or oxidation number, is defined as the hypothetical charge of an atom if all of its bonds formed with different atoms were fully ionic. It indicates the degree of oxidation of an atom in a chemical compound. Conceptually, the oxidation state may be negative, positive or zero.

Oxidation number of OH = -1

Let us suppose the oxidation number of Mg = x

Charge on compound = 0

We can write

x + 2(-1) =0

x-2=0

x = 2

Thus from the above solution we concluded that The oxidation number of Mg is +2.

Hence, Option A is correct answer.

Learn more about oxidation number:

https://brainly.com/question/3035498

#SPJ1

Describe Photosynthesis and explain the number of atoms and molecules that are used in a reaction.

Answers

Answer:

Photosynthesis reactions are naturally occurring processes that take place in all green plants and most algae. During this process the plant uses light energy, carbon dioxide, and water to make food and then releases oxygen which all living organisms require to the atmosphere.During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose

Explanation:

Please help me I really need this done

Answers

Answer is 2

4Fe + 3O2 –> 2Fe2O3

help I. have until 11:59 to hand it in ​

Answers

This chemical reaction can also be written as

2C2H6+7O2-->4CO2+6H2O

This is a chemical reaction because reactants are converted into products. This is the combustion of ethane where ethane and oxygen have been converted into carbon dioxide and water

why we add PH10 When we determine the zn ion​

Answers

Answer:

to make it basic from acidic

How many moles of Ca atoms are in 1 mol of CaSO4?

Answers

Answer:

6.02 x 10²³ atoms

Explanation:

Given parameters:

Number of moles CaSO₄ = 1 mole

Unknown:

Number of Ca atoms in the given compound = ?

Solution:

The given compound is:

          CaSO₄

     1 mole of CaSO₄  is made up of 1 mole of Ca atoms

Now;

   1 mole of any substance contains 6.02 x 10²³ atoms

  1 mole of Ca atoms will also contain 6.02 x 10²³ atoms

2.
Corona virus has a spherical shape. Its diameter is approximately 120 nm. How
many of them can sit side by side to form a circle around a piece of human hair.
Take the diameter of a hair as 50 um. (Select the nearest value to your calculation
result)
a) 1.23x10 12
b) 4.45 x106
C) 1312
d) 417

Answers

Answer:

417

Explanation:

50um is

50000nm

50000:120=417

Make a He atom with a mass of 4. How many protons did you put in the nucleus?
Make a Li atom with a mass number of 7. How many electrons did you place in the outermost orbital
(ring)?
Make a N atom with a mass number of 14. How many neutrons are in the nucleus?
Make a B atom with a mass number of 11. How many electrons did you put in the second orbital (ring)?

Answers

Answer:

This question appear incomplete

Explanation:

This question appear incomplete. However, let's answer the resulting questions. Firstly, let's define mass number since each of the "problems" refers to mass number. Mass number is the total number of protons and neutrons in the nucleus of an atom. It should also be noted that number of protons in any given neutral atom is the same with the number of electrons of such an atom.

1) Make a He atom with a mass of 4. How many protons did you put in the nucleus?

Answer: Helium (He) atom (having a mass number of 4) has an atomic number of 2. Atomic number is the number of protons and thus 2 protons would be in the nucleus of the Helium atom.

2) Make a Li atom with a mass number of 7. How many electrons did you place in the outermost orbital  (ring)?

Answer: Lithium (Li) atom (having a mass number of 7) has an atomic number of 3. Remember that atomic number (number of protons) equals number of electrons in a neutral atom. Thus, lithium atom would have 3 electrons; 2 electrons in it's first shell and 1 electron in it's outermost shell

3) Make a N atom with a mass number of 14. How many neutrons are in the nucleus?

Answer: Nitrogen (N) atom (with a mass number of 14) has an atomic number of 7. Since atomic number is the number of protons and mass number is the number of protons + neutrons. Then, number of neutrons would equal mass number minus atomic number:

number of neutrons = 14 - 7

number of neutrons = 7 neutrons

4) Make a B atom with a mass number of 11. How many electrons did you put in the second orbital (ring)?

Answer: An atom (Boron) with mass number of 11 has an atomic number of 5. Since atomic number eventually equals number of electrons, then Boron has 5 electrons; 2 electrons in it's first shell and 3 electrons in it's second orbital/ring.

Answer:

2 protons in the He nucleus,

1 electron in the outermost,

7 neutrons in the nucleus

3 electrons in the  2nd orbital ring

Explanation:

I just did it on E2020

SOMEONE HELP WITH THE LAST QUESTION QUESTION 2) HURRY IM IN ZOOM<3

Answers

The value of x = 97

The unknown angles : 97°,97°, 107° and 59°

Further explanation

One variable linear equation is an equation that has a variable and the exponent number is one.  

Can be stated in the form:  

[tex]\large{\boxed{\bold{ax=b}}[/tex]

or  

ax + b = c, where a, b, and c are constants, x is a variable  

The parallelogram has total angle of 360°.

The value of each of the 4 angles of the parallelogram :

1. x°

2. x°

3. x+10°

4. 59°

The sum of the four angles of this parallelogram is :

[tex]\tt x+x+x+10+59=360[/tex]

So that the mathematical equation becomes (by combining the like terms) :

[tex]\tt 3x+69=360\\\\3x=291\\\\x=97[/tex]

So the value of the four angles (by entering the x value)

1. 97°

2. 97°

3. x+10=97+10=107°

4. 59°

which will dissolve faster in water rock salt or granulated salt

Answers

Answer:

Salt!!!

Explanation:

How many protons, electrons, and neutrons? ANSWEN
2+
23
6521
26
Protons
Electrons
Neutrons
28
30
65
3-
31
Protons
Electrons
Neutrons
"As
57 Fe
32
3+
33
35
36
DRAGO
Protons
Electrons
Neutrons
14
ME
US

Answers

Answer:

maybe 20 butvam not sure ooo

if I use the answers from here wouldn't that come up as a high % plagiarism ??

Answers

Answer:

No

Explanation:

My sister uses this all the time and it is perfectly safe

Answer:

no

Explanation:

as long as you change it up a little and word it to look like your own

Need help now
Approximate half-life
Radon-222 = 4 days

A sample contains 18mg of radon-222. You estimate that this is 0.01% of the original isotope. How many half-lives have passed?

Answers

13 half-lives have passed

Further explanation

General formulas used in decay:  

[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}[/tex]

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

t1/2 = 4 days

Nt=18 mg (0.01% of the original isotope)

18 mg (Nt) = 0.01% No

No = the original isotope :

[tex]\tt No=\dfrac{100}{0.01}\times 18~mg=180,000[/tex]

The duration of decay  (T) :

[tex]\tt \dfrac{Nt}{No}=\dfrac{1}{2}^{T/4}\rightarrow Nt=0.01\%No[/tex]

[tex]\tt 0.01\%=\dfrac{1}{2}^{T/4}\\\\10^{-4}=\dfrac{1}{2}^{T/4}\\\\(\dfrac{1}{2})^{13}=\dfrac{1}{2}^{T/4}\\\\13=T/4\rightarrow T=52~days[/tex]

Half-lives passed :

[tex]\tt \dfrac{52}{4}=13~half-lives[/tex]

Water is a substance made up of the elements hydrogen
and oxygen.
How many types of atoms make up a particle of water?
A. 2
B. 3
C. 4
D. 1

Answers

Answer:

A. 2

Explanation:

A particle of water is made up of two hydrogen atoms and one oxygen atom. However, the question asked for how many types of atoms there are, so the answer is 2.

I think it might be 3

Everything around us is made up of different elements. The air has Oxygen and Nitrogen. Plants and people have lots of Carbon. Helium is in balloons. Hydrogen is in water. Open the Symbol screen, then explore to develop your own ideas about how the atomic particles determine the name of an atom or ion. Explain your understanding: 5. What determines the element

Answers

Answer:

Due to protons and electrons number.

Explanation:

The atomic particles determine the name of an atom or ion by number of protons because the number of protons determines the atomic number of an element and this atomic number distinguishes one element from another and number of electrons also be different in atoms of the same element due to chemical bonding, due to which ions are produced. So we can say that atomic particles such as proton, electron and neutrons determine the name of an atom or ion.

help me in my this plzzz ​

Answers

Answer:

a is oxidation

b is reduction

c is reduction

d is oxidation

hope it helps you

That the right question

A perfectly spherical balloon occupied 35°C of neon gas under a pressure of 2 atm.
The radius of the balloon is 15 cm. The balloon is then released up in the air until it
reached the temperature of -20°C under 0.3 atm. Determine its volume at that instant.

Answers

Answer:

V₂ =  116126.75 cm³

Explanation:

Given data:

Radius of balloon = 15 cm

Initial pressure = 2 atm

Initial temperature = 35 °C (35 +273 = 308K)

Final temperature = -20°C (-20+273 = 253 K)

Final pressure = 0.3 atm

Final volume = ?

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

Initial volume of balloon:

V = 4/3πr³

V = 4/3×22/7×(15cm)³

V = 14137.17 cm³

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 2 atm × 14137.17 cm³ × 253 K / 308 K × 0.3 atm

V₂ = 7153408.02 atm .cm³. K / 61.6 K.atm

V₂ =  116126.75 cm³

How many liters of carbon dioxide are formed from the complete decomposition of 50.0 g of iron (III) carbonate at STP?

Answers

Answer:

V = 1.57 L

Explanation:

Given data:

Mass of iron(III) carbonate = 50.0 g

Volume of CO₂ formed = ?

Temperature = standard = 273 K

Pressure = standard = 1 atm

Solution:

Chemical equation:

Fe₂(CO₃)₃     → Fe₂O₃ + 3CO₂

Number of moles of Fe₂(CO₃)₃ :

Number of moles = mass/molar mass

Number of moles = 50.0 g /235.8 g/mol

Number of moles = 0.21 mol

Now we will compare the moles of Fe₂(CO₃)₃  and CO₂.

                          Fe₂(CO₃)₃         :             CO₂

                              1                    :               3

                            0.21                :            1/3×0.21 = 0.07 mol

Volume of CO₂:

PV = nRT

R = general gas constant = 0.0821 atm.L/mol.K

By putting values,

1 atm × V =0.07 mol × 0.0821 atm.L/mol.K × 273 K

V = 1.57 atm.L / 1 atm

V = 1.57 L

Put the elements in order from easiest to hardest to remove an electron. Ba,Be,Ca,Sr.

Answers

Answer:

Ba,Sr,Ca,Be

Explanation:

as atomic size increases ionisation potential decreases

a mountain
b trench
c mid ocean range

Answers

I think it’s C. mid ocean range

Where are all metalloid found in this periodic table?

Answers

Answer:

Explanation:

THe GrEen OnEs

Answer:

They are in the green "staircase"

Explanation:

these elements are the dividers between metals (on the left of them) and non metals (on the right of them), they have some of the properties of both groups

MCQ
A sample of tungsten occupies a volume of 1.6 cm3. How many atoms of
tungsten in the sample? (For tungsten, density = 19.35 g/cm3)
O 61.92
O 0.337
2.03X10^23
O 1.014X1023
5.07X10^22
O 2.54X10-22​

Answers

Answer:

1.014×10²³ atoms

Explanation:

Given data:

Volume of tungsten = 1.6 cm³

Density of tungsten = 19.35 g/cm³

Number of atoms of tungsten = ?

Solution:

First of all we will calculate the mass of tungsten.

density = mass/volume

by putting values,

19.35 g/cm³ = mass/1.6 cm³

Mass = 19.35 g/cm³× 1.6 cm³

Mass = 30.96 g

Number of moles of tungsten:

Number of moles = mass/molar mass

Number of moles = 30.96 g/ 183.84 g/mol

Number of moles = 0.1684 mol

1  mole contain 6.022×10²³ atoms.

0.1684 mol × 6.022×10²³ atoms / 1mol

1.014×10²³ atoms

Which is an example of current electricity?
O A. Positively charged particles are attracted to negatively charged
particles.
O B. Negative and positive electric charges build up in different regions
of a cloud.
O C. Electrons flow from an outlet into a toaster, causing it to heat a
slice of bread.
O D. A person rubs a shoe on a rug, causing extra electrons to be
transferred to the shoe.

Answers

Answer:

C. Electrons flow from an outlet into a toaster, causing it to heat a

slice of bread.

Explanation:

Current produces a heating effect. Current may be used to produce a heating effect in appliances such as the electric pressing iron, toaster, oven etc.

When electrons flow from an outlet into a toaster and the current thus obtained heats a slice of bread, current is said to flow from the outlet into the toaster.

Let us remember that current refers to the flow of electrons in a circuit.

What is the reactant that runs out first in a reaction called?
O A. The stoichiometry
O B. The limiting reagent
OC. The reactant coefficient
OD. The theoretical yield
(Answer is B.)

Answers

Answer:

limiting reactant

Answer: B) limiting reagent

How much HCl exists in 347 mL of 0.48 M
solution of HCI?
Answer in units of mol.

Answers

Answer:

Number of moles of HCl = 0.17 mol

Explanation:

Given data:

Volume of solution = 347 mL

Molarity of solution = 0.48 M

Number of moles of HCl present = ?

Solution:

Formula:

Molarity = number of moles of HCl / volume in L

Volume in L:

347 mL× 1L / 1000 mL

0.347 L

by putting values in formula:

0.48 mol/L = number of moles / 0.347 L

Number of moles = 0.48 mol/L × 0.347 L

Number of moles = 0.17 mol

What kind of solution would you have if it contained 50 grams of sodium chloride in 100 mL of water at 30˚C?

Answers

Answer:

Supersaturated solution.

Explanation:

Hello!

In this case, according to the types of solution in terms of the relative amounts of solute and solvent, we can define a point called solubility at which the amount of solute is no longer dissolved in the solvent; thus, a value of solute/solvent less than the solubility is related to unsaturated solutions, equal to the solubility is related to the saturated solutions and more than the solubility to supersaturated solutions.

Thus, since solubility is temperature-dependent, at 30 °C the solubility of sodium chloride is 36.09 g per 100 mL of water; which means that, since the solution has 50 g of sodium chloride, more than 36.09 g, we infer this is a supersaturated solution.

Best regards!

Can someone please help me with my science research I kind of need help in a few things that I listed, I’m currently working on this element which is called Curium if anyone can help me out please do, thanks. Anyway here’s the questions:

Where can it be found?


What is its importance? What are its uses?

Answers

Answer:

For your first question, Curium does not occur naturally on Earth, meaning that it is not produced naturally on Earth. However, it can be formed in nuclear reactors.

For your second question, Curium has been used to provide power to electrical equipment used on space missions, but doesn't seem to be that important overall.

Explanation:

Hope this helped!

Other Questions
What can New Mexican residents do to reduce water use? a. Replace grasslands with native desert plants. b. Fix all water leaks found in and around ones property. c. Take shorter showers and turn off the water while brushing ones teeth. d. All of the above will reduce the amount of water needed. There are 6 2/3 pounds of walnuts in a container, which will be divided equally into containers that hold 1 1/2pounds. This would fill and 4/9 containers. (3 points) Which of the following is likely to cause shun splints A.Tapping toesB.Wearing tight shoesC.walking uphillD.Starting too fast (I do brainliest.) slope intercept form... [show ya work plz]A line passes through (3, 7) and (6, 9). Which equation best represents the line? y = 3 over 2x + 5 y = 2 over 3x + 5 y = 3x + 2 y = 2 over 3x + 2 which part of europe is very cold and why What is the area of the trapezoid?I WILL GIVE brainliest! to the first person to answer correct Calculate the area of this figure round your answer to the nearest 10th spanish or vanish What is the length of the unknown side of the right triangle? (1 point)A) 21B) 29C) 400D) 441 Cellular Respiration takes place in the (Blank answer here) organelle of plants and (Blank answer here) type of organisms which of the following is not a characteristic of the plasma membrane? 1. contains different types of protein2. composed of phospholipid bilateral3. contains the cells dna plz look at chart then answer 1 question 1. What effect did the Union victory have on the United States?2. What were the characteristics of the Southern Colonies?3. What were the characteristics of the Middle Colonies? How do you think the invention of the Dreadnought battleship change naval warfare? List two statements from the ad that are facts ( from President Reagan's 1984 re-election Campaign) What are the first three terms of the Arithmetic Sequence an = 12 2(n 1)?Group of answer choices11, 10, 912, 10, 80, 10, 201, 2, 3 There are three alleles for the ABO blood group in humans. Why are there only two alleles normally present in any individual?1. The alleles for the ABO blood group always segregate independently during meiosis.2. Each parent contributes only one allele for the ABO blood group to the offspring3. Every gene for the ABO blood group must be recessive.4. The alleles that determine the ABO blood group are on the X-chromosome. Please help me with this number 6 please I beg you Ill give you u credit and mark you smart What's the balanced equation for Iron and copper (II) sulfate solution. What is the author's primary purpose in writing thispassage?What does Machiavelli most want the reader to know?What is his secondary purpose?Whenever those states which have been acquired asstated have been accustomed to live under their own lawsand in freedom, there are three courses for those whowish to hold them: the first is to ruin them, the next is toreside there in person, the third is to permit them to liveunder their own laws, drawing a tribute, and establishingwithin it an oligarchy which will keep it friendly to you.Because such a government, being created by the prince,knows that it cannot stand without his friendship andinterest, and does its utmost to support him; andtherefore he who would keep a city accustomed tofreedom will hold it more easily by the means of its owncitizens than in any other way.--The Prince,Niccol MachiavelliHow does Machiavelli work to achieve his secondarypurpose?