A rock is thrown downward from the top of a cliff with an initial speed of 20 m/s. If the rock hits the ground after 5.0 s, what is the height of the cliff? (Disregard air resistance. a =-g=-9.81 m/s2.)​
（i want step by step)

The solar system is very large with the boundaries located around the Orth cloud 100,000 Astronomical Units away

The correct option for, the distance to the nearest star if the solar system were the size of a campus is the option;

About a mile away

The reason the above selection is correct is as follows:

The ratio of the area of the solar system to the area of a campus = (π × (10⁵ × 149.6 × 10⁶)²)/(109.2651) = 6.4347487 × 10²⁴

Therefore, the linear scale factor ≈ √(6.4347487 × 10²⁴) ≈ 2.5366807 × 10¹²

Therefore, the corresponding distance to the distance of the nearest star to the solar system, X is given as follows;

X = (40,208,000,000,000 km)/(2.5366807 × 10¹²) ≈ 15.85 km ≈ 9.85 miles

Given that compared with the largest campus the distance is at most approximately 9.85 mile, if the solar system is taken to be a much smaller campus, the distance of the closest star Proxima Centauri will be about a mile away

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Answer:

One must drive [tex]$41 \cdot 8\,miles$[/tex] north and [tex]$68 \cdot 24\,miles$[/tex] south, in order to travel from Atlanta to Macon.

Explanation:

• The distance of an object can be defined as the complete path travelled by an object.

• To find the distance, find its north component.

• For reference see the below graph:

[tex]$$\[\begin{align}& D_{south} = 80\sin \left( {58 \cdot {5^ \circ }} \right) \\& D_{north} = 80\cos \left( {58 \cdot {5^ \circ }} \right) \\\end{align}\]$$Since, $\sin \left( {58 \cdot {5^ \circ }} \right) = \cdot 853$ and $\cos \left( {58 \cdot {5^ \circ }} \right) = \cdot 5224$: therefore,$$\[\begin{align} D_{south} &= 80 \times \left( { \cdot {{853}^ \circ }} \right) \\ \Rightarrow {D_{south}} &= 68 \cdot 24\,miles \\ \end{align}\]$$[/tex]

And

[tex]$$\[\begin{align} D_{north}& = 80 \times \cdot 5224 \\ \Rightarrow D_{north}& = 41 \cdot 8\,miles \\ \end{align}\]$$[/tex]

• Hence, one must drive [tex]$41 \cdot 8\,miles$[/tex] north and [tex]$68 \cdot 24\,miles$[/tex] south, in order to travel from Atlanta to Macon.

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The average speed of the ant is 0.276 cm/s and the average velocity is 0.136 cm/s.

The correct answer is option D.

In the given graph, we can deduce the following;

The average speed of the ant is calculated as;

[tex]average \ speed = \frac{total \ distance }{total \ time }[/tex]

The total distance from the graph is calculated as follows;

The total distance = (6 + 2 + 2 + 7 + 7 + 3 + 2) cm = 29 cm

[tex]average \ speed = \frac{total \ distance }{total \ time } = \frac{29 \ cm}{105 \ s} = 0.276 \ cm/s[/tex]

The average velocity is calculated as the change in displacement per change in time.

The displacement is the shortest distance between the start and end positions.

Notice, you have a right triangle, now calculate the length of  line P.

                                                ↓end

                                                ↓

                                                ↓ 6cm

                                                ↓

  start -------------13 cm------------

Use Pythagoras theorem to solve for P.

[tex]P^2 = 6^2 + 13^2\\\\P^2 = 36 + 169\\\\P^2 = 205\\\\P= \sqrt{205} \\\\P = 14.318 \ cm[/tex]

The average velocity of the ant is calculated as;

[tex]average \ velocity= \frac{\Delta displacemnt }{total\ time }= \frac{14.318 \ cm}{105 \ s} = 0.136 \ cm/s \\\\[/tex]

Thus, the average speed of the ant is 0.276 cm/s and the average velocity is 0.136 cm/s.

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Answer:

1.71s

Explanation:

Acceleration = the change in velocity / the change in time

Or I can write it as

a = V2 - v1

- - - -----

t

V1 (initial velocity) = 7.5m/s

V2 ( final velocity) = 14.0m/s

a =3.8m/s^-2

Therefore

a= V2 - V1

- - - - - - - -

t

t = V2 - v1

- - - - - - -

a

t = 14 - 7.5

- - - - - -

3.8

t = 1.71s

Answer:

it is p

Explanation:

because it makes more sense

Answer:

It is experimental. She will testing or investigating on children. So yeah, it is experimental

1. Acceleration is the change in velocity of an object per unit time.

2. 36 km/h

= 36000 m/60×60 s

= 36000 m/3600 s

= 10 m/s

Hope it helps! Please do comment

Please find attached photograph for your answer. Hope it helps! Please do comment.

Answer:

the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion

Explanation:

Answer:

Mass number is the sum of the protons and neutrons in the atomic nucleus.

The mass number (A) is the sum of the atomic number (Z), which is the number of protons, and the number of neutrons (N) in the atomic nucleus of an isotope of an element. A=Z+N

[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{100-0}{20}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{100}{20}[/tex]

[tex]\\ \sf\longmapsto Acceleration=5m/s^2[/tex]

Answer:

[tex]initial \: velocity \: = 0 \\ final \: velocity \: 100 \frac{m}{s} \\ time = 20 \\ here \: we \: want \: to \: find \: accelaration \\ accelaration \: = \frac{final \: velocity - initial \: velocity}{time} \\ accelaration \: = \frac{100 - 0}{20} = \frac{100}{20} = 5 \frac{m}{ {s}^{2} } \\ thank \: you[/tex]

Answer:

Explanation:

1) either all the way to the ground, or, if the cliff is high enough,

h = ½(9.8)1.4² = 9.6 m

2) If the cliff is high enough and we ignore air resistance

v = 9.8(2.7) = 26 m/s

The complete question is;

Determine the order of magnitude of the following small number by entering the appropriate exponent n below: 6,370km≈10^n km .

Order of magnitude is 3.

        In this case, we have 6.37 and it is closer to 10 than 1.

The order of magnitude is the exponent attached to the 10 on the right.

Thus, order of magnitude is 3.

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The order of magnitude of the given number will be "3.804".

According to the question, the number is:

→ [tex]6370 \ km = 10^n \ km[/tex]

By taking "[tex]log_{10}[/tex]" both sides, we get

→ [tex]log_{10}(6370) = log_{10} \ 10^n[/tex]

By putting the values accordingly, we get

→ [tex]log_{10} (6370) = n[/tex]

→                [tex]n = 3.804[/tex]

Thus the above answer is correct.

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S = (v-u)t/2

s = (14)1.4/2

s = 9.8m

The range of the shot will be "19.6 m". A complete solution is provided below.

The given values in the question are:

Horizontal velocity,

v = 14 m/s

Time,

t = 1.4 sec

Now,

The Range will be:

= [tex]Velocity\times Time[/tex]

By putting the given values, we get

= [tex]14\times 1.4[/tex]

= [tex]19.6 \ m[/tex]

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Answer:

F

T

F

T

T

Explanation:

Thanks for this oppurtunity

hi <3

fossil fuel consumption has increased in recent years due to many countries industrializing and becoming more advanced. burning fossil fuels releases greenhouse gases which trap radiation within the atmosphere and heat up the planet

hope this helps :)

Answer:

no idea what this means

Explanation:

yeah

Answer:

moon gravity is about one sixth of earth gravity

W = 10(9.8/6) = 16 N

Answer:

f = 1/3 Hz

Explanation:

0.25 = 0.5 sin(2πf)0.25

0.5 = sin(0.5πf)

take arcsine of both sides in radians

0.52359 = 0.5πf

f = 0.52359 / 0.5π = 0.33333...

The frequency of the oscillator is 0.33 Hz.

We have an equation of SHM.

We have to identify the frequency of the oscillator.

The conditions are -

According to the question, we have -

x = 0.5 sin(2πft)

Substituting the values -

0.25 = 0.5 sin(2πft)

sin(2πft) = 0.5

sin(2πft) = 1/2

sin(2πft) = sin(π/6)

2πft = π/6

2ft = 1/6

f = [tex]\frac{1}{12t}[/tex] = [tex]\frac{1}{12\times 0.25}[/tex] = 0.33 Hz

f = 0.33 Hz

Hence, the frequency of the oscillator is 0.33 Hz

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Answer:

117.06 A

Explanation:

V = IR

2650 = 66(R)

2650/66 = R

40.15 = R

V = IR

4700 = I(40.15)

4700/40.15 = I

117.06 = I

Answer:

All of the above ! Hope this helps! ♥

Explanation:

Being willing to sincerely apologize for mistakes, errors, and blunders goes a long way toward nurturing relationships with customers and retaining customers. Option (c) is correct.

Apology means to express regret for having done something that has caused another person problems or misery

Sincere apology aids in mending ties with those you've harmed. That may include coworkers, customers, friends, or family.

You can start a conversation with the other person by owning up to your error. You can then consider your actions and accept responsibility for them. Also, they can deal with their emotions, regain their composure, and refrain from taking responsibility for what transpired.

You may improve your behavior going forward, keep your dignity, and regain people's respect by apologizing.

Therefore, Option (c) is correct.

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Your question is incomplete, most probably the complete question will be;

Being willing to sincerely apologize for mistakes, errors, and blunders goes a long way toward:

Helping to learn from mistakes

Helping nurture the relationship with customers

Retaining customers

All of the above

Answer:

Explanation:

None of the other answers matter but the right answer which A. Silicon has an outer shell of 4. Carbon can connect with 4 elements  because of its outer shell. CH4 is the simplest example. But C2H6 is also possible.

     H   H

H - C - C - H

     H   H

There are 4 connections to the outside world for the Carbon (C) on the left.

It has 3 hydrogens connected on to it and one of its connecting electrons goes with the other carbon on the right.

Silicon can do the same thing.

Explanation:

V = 400x6 = 2400m/s

V = 2400m/s

The velocity of a water wave if the frequency is 400hz the wavelength is 6m and the amplitude of the wave is 3.76cm will be 2400 m/s.

It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.

The velocity of water wave = Wavelength x Wave Frequency

                                             = 6 × 400 m/s

                                             =2400 m/s

Thus, The velocity of a water wave if the frequency is 400hz the wavelength is 6m comes out to be 2400 m/s.

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Answer:

Explanation:

Area A = 4 pi R^2

lnA = ln(4 pi) + 2 ln R

dA/A = 2 dR/R = 2*(alpha)*dT

delta A = 2A*alpha*(delta T)

OR

A at T + deltaT

delta A = 4 pi (R + deltaR)^2 - A

= 4 pi R(1 + alpha*deltaT)^2 -A

= 4 pi R^2 *[1 + 2*alpha*deltaT +

(alpha*deltaT)^2] - A

= 2*A*alpha*deltaT + A*(alpha*deltaT)^2

(Ignore the second term in deltaT^2)

The heating element of an electric oven is designed to produce 3.9 kW of heat when connected to a 240-V source. Then the resistance of the element is 14.7Ω

When A 120-V hair dryer has two settings: 950 W and 1400 W then the resistance at 950 W is 15.15Ω and at 1400 W is 10.28Ω.

The pace at which electrical energy is transmitted by an electric circuit is referred to as its power. The watt is the SI unit of power, equal to one joule per second. Watts, like other SI units, have standard prefixes: thousands, millions, and billions of watts are referred to as kilowatts, megawatts, and gigawatts, respectively.

It is a popular misperception that electric power is purchased and sold, whereas electrical energy is. Electricity, for example, is sold to users in kilowatt-hours (kilowatts multiplied by hours), because energy is defined as power multiplied by time.

In this problem,

Given,

Power P = 3.9 KW

Voltage V = 240 V

P = V²/R

3.9 × 10³ = 240²/R

R = 240²/3.9 × 10³

R = 14.7Ω

For hair dryer,

given,

P = 950 W or 1400 W

V = 120 V

P = V²/R

950 = 120²/R

R = 120²/950

R = 15.15Ω

P = V²/R

1400= 120²/R

R = 120²/1400

R = 10.28Ω

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Answer: c is the correct answer

Explanation:

Option C is the correct answer.

Definition of Science: A way of discovering and knowing about the world.

Science

Science can be defined as the knowledge and understanding of the natural and social world following a systematic methodology based on evidence.

The scientific methodology includes objective observation, measurement and data evidence.

Science is a system of observations and experiments used to gain knowledge about how the universe works. Observations describe how and why things happen the way they do. Experiments are investigations used to explain how the world works.

Hence option C represents the best definition.

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Answer:It is a combination reaction; nitrogen and hydrogen combine to form ammonia

Explanation:

This is the reaction that is used to make ammonia from hydrogen and nitrogen. In this reaction, only one product is formed. Therefore, this reaction is known as a combination reaction.

Answer:

B increases hope this is right