Mathematics: Help hère to answer this question please

Help hère to answer this question please, №13625649, 17.03.2021 21:53

Physics

Aroller coaster starts down a hill at 10 m/s. three seconds later, its speed is 32 m/s. what is the roller coaster’s acceleration? question 1 options: -7.3 m/s -7.3 m/s2 3 m/s 3 m/s 2 save question 2 (2 points) question 2 unsaved natalie accelerates her skateboard along a straight path from 4 m/s to 0 m/s in 25.0 s. find the acceleration. question 2 options: -6.25 m/s2 0.16 m/s2 -0.16 m/s2 6.25 m/s2 save question 3 (2 points) question 3 unsaved find the average acceleration of a northbound subway train that slows from 12 m/s to 9.6 m/s in 0.9 s

Step-by-step answer

P Answered by PhD

37

1) a = Δv/Δt
a = (32-10)/3
a = 7.33 m/s²

2) a = (0 - 4)/25
a = -0.16 m/s²

3) a = (9.6 - 12) / 0.9
a = -2.7 m/s²

4) a = (9-4)/0.5
a = 10 mi/h²

5) m/s²

Physics

Aroller coaster starts down a hill at 10 m/s. three seconds later, its speed is 32 m/s. what is the roller coaster’s acceleration? question 1 options: -7.3 m/s -7.3 m/s2 3 m/s 3 m/s 2 save question 2 (2 points) question 2 unsaved natalie accelerates her skateboard along a straight path from 4 m/s to 0 m/s in 25.0 s. find the acceleration. question 2 options: -6.25 m/s2 0.16 m/s2 -0.16 m/s2 6.25 m/s2 save question 3 (2 points) question 3 unsaved find the average acceleration of a northbound subway train that slows from 12 m/s to 9.6 m/s in 0.9 s

Step-by-step answer

P Answered by PhD

37

1) a = Δv/Δt
a = (32-10)/3
a = 7.33 m/s²

2) a = (0 - 4)/25
a = -0.16 m/s²

3) a = (9.6 - 12) / 0.9
a = -2.7 m/s²

4) a = (9-4)/0.5
a = 10 mi/h²

5) m/s²

Chemistry

Brainliest which equation demonstrates a strong arrhenius acid? a h2co3(aq) + h2o (l) arrow h3o+(aq) +hco3-(aq) b lioh(aq) →li+(aq) +oh-(aq) c hbr(aq)+h2o(l)→ h3o+(aq)+ br-(aq) d c5h5n(aq) + h2oarrowc6h6n+(aq)+oh-(aq) a b c d all of these which equation demonstrates a weak arrhenius acid? a h2co3(aq) + h2o (l) arrow h3o+(aq) +hco3-(aq) b lioh(aq) →li+(aq) +oh-(aq) c hbr(aq)+h2o(l)→ h3o+(aq)+ br-(aq) d c5h5n(aq) + h2oarrowc6h6n+(aq)+oh-(aq) d a c all of these b which equation demonstrates a strong arrhenius base? a h2co3(aq) + h2o (l) arrow h3o+(aq)

Step-by-step answer

P Answered by Master

5

answers in order C,A,B,D,because the reactants only partially ionize in the solution,none of these( SO4 2- is a strong one),none of these( all are weak),same(beacause both Ka and Kb values are equal in those subtances),di,mono,tri,mono,mono,mono,di,di,mono,Na2Be(OH)4(aq)...

Explanation:

this quiz doesnt worth my time...but have a nice day.

Chemistry

Brainliest which equation demonstrates a strong arrhenius acid? a h2co3(aq) + h2o (l) arrow h3o+(aq) +hco3-(aq) b lioh(aq) →li+(aq) +oh-(aq) c hbr(aq)+h2o(l)→ h3o+(aq)+ br-(aq) d c5h5n(aq) + h2oarrowc6h6n+(aq)+oh-(aq) a b c d all of these which equation demonstrates a weak arrhenius acid? a h2co3(aq) + h2o (l) arrow h3o+(aq) +hco3-(aq) b lioh(aq) →li+(aq) +oh-(aq) c hbr(aq)+h2o(l)→ h3o+(aq)+ br-(aq) d c5h5n(aq) + h2oarrowc6h6n+(aq)+oh-(aq) d a c all of these b which equation demonstrates a strong arrhenius base? a h2co3(aq) + h2o (l) arrow h3o+(aq)

Step-by-step answer

P Answered by Specialist

5

answers in order C,A,B,D,because the reactants only partially ionize in the solution,none of these( SO4 2- is a strong one),none of these( all are weak),same(beacause both Ka and Kb values are equal in those subtances),di,mono,tri,mono,mono,mono,di,di,mono,Na2Be(OH)4(aq)...

Explanation:

this quiz doesnt worth my time...but have a nice day.

Chemistry

Equilibrium lab analysis questions: use what you learned in this lab to answer the following questions in complete sentences. 1. bromthymol blue, btb is an acid which has a hydrogen ion, h+. for purposes of this question you will write it hbtb. hbtb ionizes in water to produce hydrogen ion, h+, and bromthymol blue ion, btb-.a) what color appeared when you added hcl to btb? b) what color appeared when you added naoh? c) explain the shift in equilibrium in terms of le chatelier s principle

Step-by-step answer

P Answered by PhD

2

See below

Explanation:

a) Adding HCl

HBTB is yellow in acid solution.

b) Adding NaOH

HBTB is blue in basic solution.

c) Explanation

HBTB is a weak acid in which the undissociated and ionized forms have different colours.

$\underbrace{\hbox{\text{HBTB }}}_{\hbox{\text{yellow}}} + \text{{ H$_{2}$O}}\rightleftharpoons \text{H$_{3}$O$^{+}$} +\underbrace{\hbox{\text{ BTB$^{-}$}}}_{\hbox{\text{blue}}}$

Around pH 7 , the indicator consists of roughly equal amounts of the yellow and blue forms, so it appears green

According to Le Châtelier's Principle, if you apply a stress to a system at equilibrium, it will respond in a way that will relieve the stress.

When you added HCl, you increased the concentration of H₃O⁺. The system responded in a way that would decrease the H₃O⁺. That is, the position of equilibrium shifted to the left and produced more of the yellow form.

When you added NaOH, the base removed some of the H₃O⁺. The system responded in a way that would increase the H₃O⁺. That is, the position of equilibrium shifted to the right and produced more of the blue form

Chemistry

Question 57 the sharing or transferring of outer valence electrons between atoms results in a chemical bond. true false 2 points save answer question 58 the bond exhibited between two nitrogen atoms is an example of a covalent bond. true false 2 points save answer question 59 the bond exhibited between lithium and fluorine is an example of an ionic bond. true false 2 points save answer question 60 which of the following pairs of atoms exhibit an ionic bond? h and s fe and o c and f c and n 3 points save answer question 61 which of the following

Step-by-step answer

P Answered by Specialist

5

57 - True

58 - True

59 - True

60 - Fe and O

61 - Sr and F

62 - both ionic and covalent bonds

Hope this helps!

Chemistry

Equilibrium lab analysis questions: use what you learned in this lab to answer the following questions in complete sentences. 1. bromthymol blue, btb is an acid which has a hydrogen ion, h+. for purposes of this question you will write it hbtb. hbtb ionizes in water to produce hydrogen ion, h+, and bromthymol blue ion, btb-.a) what color appeared when you added hcl to btb? b) what color appeared when you added naoh? c) explain the shift in equilibrium in terms of le chatelier s principle

Step-by-step answer

P Answered by PhD

2

See below

Explanation:

a) Adding HCl

HBTB is yellow in acid solution.

b) Adding NaOH

HBTB is blue in basic solution.

c) Explanation

HBTB is a weak acid in which the undissociated and ionized forms have different colours.

$\underbrace{\hbox{\text{HBTB }}}_{\hbox{\text{yellow}}} + \text{{ H$_{2}$O}}\rightleftharpoons \text{H$_{3}$O$^{+}$} +\underbrace{\hbox{\text{ BTB$^{-}$}}}_{\hbox{\text{blue}}}$

Around pH 7 , the indicator consists of roughly equal amounts of the yellow and blue forms, so it appears green

According to Le Châtelier's Principle, if you apply a stress to a system at equilibrium, it will respond in a way that will relieve the stress.

When you added HCl, you increased the concentration of H₃O⁺. The system responded in a way that would decrease the H₃O⁺. That is, the position of equilibrium shifted to the left and produced more of the yellow form.

When you added NaOH, the base removed some of the H₃O⁺. The system responded in a way that would increase the H₃O⁺. That is, the position of equilibrium shifted to the right and produced more of the blue form

Chemistry

Question 57 the sharing or transferring of outer valence electrons between atoms results in a chemical bond. true false 2 points save answer question 58 the bond exhibited between two nitrogen atoms is an example of a covalent bond. true false 2 points save answer question 59 the bond exhibited between lithium and fluorine is an example of an ionic bond. true false 2 points save answer question 60 which of the following pairs of atoms exhibit an ionic bond? h and s fe and o c and f c and n 3 points save answer question 61 which of the following

Step-by-step answer

P Answered by Specialist

5

57 - True

58 - True

59 - True

60 - Fe and O

61 - Sr and F

62 - both ionic and covalent bonds

Hope this helps!

Health

H.o.p.e course questions question 1 susan has been hoping to get into her favorite college and has extended her study hours late into the night. which of the following might susan feel while taking the difficult entrance exam for her favorite college? (3 points) select one: a. normal sleep b. normal heart rate c. increased energy d. upset stomach question 2 which of these demonstrates the most sportsman-like statement? (3 points) select one: a. you can keep playing hard, but you better focus or we re in trouble. b. mistakes are going to happen,

Step-by-step answer

P Answered by Specialist

8

Question 1: D

Question 2: D

Question 3: A (
Get more sleep to improve your immune system)

Note: you didn't completely finish this question so I answered it the best way as I recall it from a previous answer.

Health

H.o.p.e course questions question 1 susan has been hoping to get into her favorite college and has extended her study hours late into the night. which of the following might susan feel while taking the difficult entrance exam for her favorite college? (3 points) select one: a. normal sleep b. normal heart rate c. increased energy d. upset stomach question 2 which of these demonstrates the most sportsman-like statement? (3 points) select one: a. you can keep playing hard, but you better focus or we re in trouble. b. mistakes are going to happen,

Step-by-step answer

P Answered by Specialist

8

Question 1: D

Question 2: D

Question 3: A (
Get more sleep to improve your immune system)

Note: you didn't completely finish this question so I answered it the best way as I recall it from a previous answer.

Help hère to answer this question please

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