If Joey ran 60 meters in 10 seconds, then his velocity is ________ m/s.

Answer:

Beth went back toward her origin

Explanation:

Please, see the attached image that represent's Beth's path.

She started her walk 2 meters from the origin (0) and after 6 seconds she headed back to position zero (0) the origin. Notice the second half of the graph as a segment going down, thus reducing her distance from the origin, and getting closer to it.

Answer:

Beth went back toward her origin.

Beth speed up considerably.

Explanation:

speed of the object is defined as the slope of the position time graph

here we know that

initially it moves from t = 0 to t = 6 from x = 2 to x = 8

so the slope is given as

[tex]v = \frac{x_2 - x_1}{t_2 - t_1}[/tex]

[tex]v = \frac{8 - 2}{6 - 0}[/tex]

[tex]v = 1 m/s[/tex]

similarly for next we have

again it comes to x = 0 after t = 10 s

so the speed is

[tex]v_2 = \frac{x_3 - x_2}{t_3 - t_2}[/tex]

[tex]v_2 = \frac{0 - 8}{10 - 6}[/tex]

[tex]v_2 = -2 m/s[/tex]

so here the velocity is negative which shows that it will move in reverse direction also its velocity is also increase

so correct answers are

Beth went back toward her origin.

Beth speed up considerably.

The calculated percent error for the student who weighed a 200.0 g mass as 186.5 g is -6.75%, indicating that the measured value was lower than the actual value.

The student's percent error is calculated using the formula [(observed value - true value) / true value] * 100. In this case, the observed value is the value measured by the student, which is 186.5 g. The true value is the actual weight of the object, which is 200.0 g. By substituting these values into the formula, we get percent error = [(186.5 g - 200.0 g) / 200.0 g] * 100, resulting in a percent error of -6.75%. This negative value indicates that the measured value is lower than the actual value.

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Final answer:

The development of heart disease is correlated with factors such as high cholesterol levels, obesity, and high blood pressure. Modifiable lifestyle choices, including diet and exercise, greatly influence cardiovascular health, while diabetes and family history also play significant roles.

Explanation:

The likelihood of developing heart disease is correlated with several factors. High cholesterol levels, particularly high amounts of "bad cholesterol", significantly increase the risk of cardiovascular diseases like coronary artery disease (CAD), where arteries narrow due to the buildup of plaques. Similarly, obesity, which involves having a very high percentage of body fat, especially around the abdomen, similarly elevates the risk for heart conditions.

Furthermore, high blood pressure makes the cardiovascular system work harder than normal, potentially leading to conditions like hypertension and contributing to heart disease. These are some of the modifiable factors affecting heart disease, in addition to lifestyle choices such as diet and exercise, which also play a crucial role in cardiovascular health.

It's important to note that preventing cardiovascular disease is possible by controlling these risk factors. Healthy lifestyle choices, such as quitting smoking, regular exercise, and a balanced diet, can lower a person's risk of developing heart disease. Additionally, being aware of the impact of diabetes and family medical history can help in managing and mitigating the risks associated with heart disease.

Answer:

Speed of the ball in position D [tex]=14.92 \frac{m}{s}[/tex]

Explanation:

Given:

Position of B=11.3[tex]\text { meters }[/tex]

Position of D=1.9[tex]\text { meters }[/tex]

Velocity of B=6.2[tex]\text { meters }[/tex]

To Find:

Velocity of D

Solution:

According to the formula, Velocity is given as

[tex]V d=\sqrt{\left[V b^{2}+(2 \times g \times d y)\right]}[/tex]

[tex]V b[/tex]=Velocity of B

[tex]V d[/tex]=Velocity of D

g=acceleration due to gravity=9.8 m/s^2  

[tex]d y[/tex]=Change in position of B and D

Substitute the all values in the above equation we get  

[tex]d y=11.3-1.9[/tex]

[tex]V d=\sqrt{\left[6.2^{2}+(2 \times 9.8 \times(11.3-1.9))\right]}[/tex]

[tex]=\sqrt{[38.44+(2 \times 9.8 \times(9.4))]}[/tex]

[tex]=\sqrt{[38.44+(19.6 \times 9.4)]}[/tex]

[tex]=\sqrt{38.44+186.24}[/tex]

[tex]=\sqrt{222.68}[/tex]

[tex]=14.92 \frac{m}{s}[/tex]

Result :

The velocity of D is [tex]=14.92 \frac{m}{s}[/tex]

The 'decision-making process' is a series of steps employed to make well-informed decisions and solve problems efficiently. It encompasses understanding the problem, assembling information, producing options, examining these options, choosing the best one, and implementing and evaluating the outcome.

The answer you're likely seeking is the decision-making process. This process is a series of steps that can aid in making informed decisions and solving problems effectively. This process often includes identifying the problem, gathering information, generating ideas or solutions, evaluating potential solutions, choosing the most suitable solution, and then implementing and assessing this chosen solution. This sequence of steps is used in many contexts, from mathematics to business to personal life.

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The concept of weight allows us to find the mass of each body, finding that the answer for the body with the greatest mass is:

Density is a connection used in many expressions of physics, it is defined by the relationship between the mass and the volume of the body.  

      ρ = [tex]\frac{m}{V}[/tex]

Where ρ is the density, m the plus and V the volume of the body

The specific weight is defined by the relationship between the weight of the body and its volume, it is a quantity that depends on the value of the acceleration due to the gravity of the place. Expression used in the English system of measurements

       γ = [tex]\frac{W}{V}[/tex]

From the previous expressions it is observed that the density and the specific weight are related

        γ = ρ g

The weight of the product of the mass of the body that is invariant by the value of the acceleration of gravity, whose value depends on the place of measurement.

             W = m g

             m = W / g

Where W is the weight, m ​​the mass and g the acceleration due to gravity

This exercise describes the values ​​in the following table

material     volume (cm³)     weight (lb)

  W                   10                     2

  X                  122                     3

  Y                    56                     1

  Z                     18                     7

They ask to find which body has the greatest mass.

In the English system, the measurement is the weight of the body, which is expressed in pounds, the mass measurement is not so common and its unit is the slug.

let's calculate

Material W

          m = 2/32

          m = 0.0625 slug

Material X

         m = 3/32

         m = 0.09375 slug

Material Y      

             m = 1/32

             m = 0.0312 slug

Material Z

             m = 7/32

             m = 0.125 slug

In conclusion, using the concept of weight, we can find the mass of each body, finding that the answer for the body with the greatest mass is:

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Answer:

D

Explanation:

Edge

Answer: scientific laws or the laws of science are statements that describe or predict a range of natural phenomena

Explanation:

Answer:

a) 6.46 seconds

b) 334 feet

c) Kathy: 103 ft/s; Stan: 89.6 ft/s

Explanation:

At constant acceleration:

x = x₀ + v₀ t + ½ at²

where x is final position,

x₀ is initial position,

v₀ is initial velocity,

a is acceleration,

and t is time.

For Kathy, x₀ = 0 ft, v₀ = 0 ft/s, a = 16 ft/s², and t = t.

For Stan, x₀ = 0 ft, v₀ = 0 ft/s, a = 12 ft/s², and t = t + 1.

Kathy:

x = 0 + (0) t + ½ (16) t²

x = 8t²

Stan:

x = 0 + (0) (t + 1) + ½ (12) (t + 1)²

x = 6 (t + 1)²

a) When Kathy overtakes Stan, they have the same position:

8t² = 6 (t + 1)²

8t² = 6 (t² + 2t + 1)

8t² = 6t² + 12t + 6

2t² − 12t − 6 = 0

t² − 6t − 3 = 0

Solving with quadratic formula (or complete the square):

t = [ -(-6) ± √((-6)² − 4(1)(-3)) ] / 2(1)

t = [ 6 ± √(36 + 12) ] / 2

t = (6 ± √48) / 2

t = (6 ± 4√3) / 2

t = 3 ± 2√3

Since t > 0, t = 3 + 2√3 ≈ 6.46 seconds.

b) Kathy's position when she overtakes Stan is:

x = 8t²

x = 8 (3 + 2√3)²

x ≈ 334 feet

c) To find the final velocities, we use:

v = at + v₀

For Kathy:

v = (16) (3 + 2√3) + 0

v ≈ 103 ft/s

For Stan:

v = (12) (3 + 2√3 + 1) + 0

v ≈ 89.6 ft/s

mathematically,

[tex]frequency = \frac{1}{t} [/tex]

where t = time

from the question, t= 0.077sec

substitute it in the formula

[tex]frequency = \frac{1}{0.077} [/tex]

[tex]frequency = 12.987 {s}^{ - 1} [/tex]

approximately 13s^-1

If a wave has a period of 0.077 sec, it has a frequency of 12.98.

The frequency of a repeated event is the number of occurrences per unit of time. It is separate from angular frequency and is sometimes referred to as temporal frequency. The frequency is expressed in hertz (Hz), which equals one occurrence per second.

An example is a human heart that can beat at up to 68 beats per minute.

The frequency is the number of times an observation is repeated between the upper and lower class bounds of that class. Cumulative Frequency is the sum of frequencies up to that class.

Frequency = 1 / t

where t = time

from the question, t = 0.077sec

substitute it in the formula

1 / 0.077 = 12.98

Therefore, the frequency of a wave whose period is 0.077 seconds is 12.98.

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Answer:

0.0222 A

Explanation:

V = I*R

[tex]15v = 675ohms \times i \\ i = \frac{15v}{675ohms} = 0.0222 a [/tex]

Using Ohm's law, which is I = V/R, the current I is calculated by dividing the voltage V (15V) by the resistance R (675Ω), resulting in a current of 22.2 milliamps.

The student is asking how to calculate the current in a circuit when given the voltage and resistance. To find the current (I), we use Ohm's law, which is represented by the equation I = V/R, where I is the current in amperes (A), V is the potential difference in volts (V), and R is the resistance in ohms (
). To solve the student's problem:

Voltage (V) = 15 Volts
Resistance (R) = 675 Ohms

Plugging these values into Ohm's law:

I = V/R
I = 15V / 675 Ω
I = 0.0222 A or 22.2 mA (Milliamps)

Therefore, the current in the circuit is 22.2 milliamps.

Answer:

Explanation:

1. Many buyers and sellers participate in the market.

2. Sellers offer identical products.

3. Buyers and sellers are well informed about products.

4. Sellers are able to enter and exit the market freely.

Answer:

D.) Logic

Explanation:

Definition:

the reasoning conducted or assessed according to strict principles of validity.

Hope this helps you out ; D

D. Logic.

Scientific information has been the consequence of scientific method, which is based on reason and observation. Hence, the gathering and interpretation of information in a scientific must be based on logic and reasoning, which are based on rules of inference, on what it is observed.

We conclude that correct choice is D.

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Answer:

distance is 180 displacement is 0

Explanation:

Displacement is the distance between one point to another directly in only one direction but distance is the distance traveled altogether in any direction.

The displacement of the car traveling around a rectangular track and returning to the starting point is zero, while the total distance traveled by the car is the sum of all sides of the rectangle, thus 180 cm.

In physics, displacement is defined as the shortest distance from the initial to the final position of a point. Therefore, if a car starts from a point on the track and makes a round trip back to the same point, the displacement of the car is zero.

Total distance traveled by the car, however, is the total length of the path covered by the car. The track is a rectangle with width 30 cm (short side) and length 60 cm (long side). Thus the total distance is calculated by adding up the lengths of all sides of the rectangle (2*30 cm + 2*60 cm) which equals 180 cm.

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Answer:

[tex]6v_0[/tex]

Explanation:

The speed of the particle increases linearly with time, so we can write it as

[tex]v(t) = kt+v_0[/tex]

where k is the a certain constant of proportionality and [tex]v_0[/tex] is the initial speed.

We also know that at t = 4 s, the speed is [tex]v=2v_0[/tex], so we can use this information to find k:

[tex]v(4) = 4k+v_0 = 2v_0 \rightarrow k = \frac{v_0}{4}[/tex]

So the complete expression of v(t) is

[tex]v(t) = \frac{v_0}{4}t+v_0 = v_0 (\frac{t}{4}+1)[/tex]

Now we integrate the quantity [tex]v(t)[/tex], and we find:

[tex]\int {v(t)} \, dt =\int (\frac{v_0}{4}t+v_0) \, dt =\frac{v_0}{8}t^2 + v_0 t[/tex]

Substituting the limit of integration t = 4, we find:

[tex]\frac{v_0}{8}4^2 + 4v_0 =2v_0+4v_0 = 6v_0[/tex]

And substituting t = 0, we find 0. So, the result of the integration from 0 to 4 is

[tex]6v_0[/tex]

Answer:

Explanation:

The other members of the study group will have different ideas and perspectives to their own, thus generating different ways of understanding a topic. When you study, you only have one vision, however, by doing it in company, your own knowledge is enriched and you can understand the concepts globally.

It is another advantage of studying in a group. Being alone, he turns around before sitting down to study, looking for excuses and wasting time. On the other hand, when having a study appointment, you must meet a schedule, taking advantage of the moment to just study. They will also encourage each other to continue studying. In short, you cannot postpone studies as you would if you were studying alone.

Joining a study group generally makes the act of studying a little less monotonous. You should try to put together a group with those who understand the subject and are responsible, and the ideal is to enjoy the entire study process in company.

Answer:

Look at things from a different angle.

Other members of the study group will have different views and viewpoints than they do, resulting in a variety of approaches to a topic. When you study, you only have one vision; but, when you do it in a group, your knowledge expands and you may grasp topics more broadly.

Motivation

Another benefit of studying in a group is this. He turns around before settling down to study because he is alone, looking for reasons and wasting time. When you have a study appointment, on the other hand, you must stick to a timetable and use the time to study. They will also motivate one another to keep learning. In other words, you won't be able to postpone your studies like you would if you were studying alone.

Explanation:

Answer:

false

Explanation:

A mixture of soil does not have the same chemical composition through out.

at some point we begins to see different chemical composition

Answer:Place the graduated cylinder on a flat surface and view the height of the liquid in the cylinder with your eyes directly level with the liquid. The liquid will tend to curve downward. This curve is called the meniscus. Always read the measurement at the bottom of the meniscus.

Explanation:

Answer:

According to first law of motion, a body continues to be in state of rest or motion unless an unbalanced force acts on it.

When the bus stops, Jose feels a sudden forward motion. This is due to the inertia of motion. In the bus, Jose has same speed as the bus while sitting. When she gets and starts moving, the bus stops at the light. But due to the inertia of motion, Jose feels a sudden forward motion before she finally stops.

Answer: Creative Thinking process.

Explanation:

Artists process imagination.

Artists don’t use labs.

Scientists and artists have a different type of computer knowledge (artists having graphic design knowledge and scientists knowing more about data.)

Answer:

creative thinking process

Answer:

$55,881

Explanation:

A = P (1 + r)^t

where A is the final amount,

P is the initial amount,

r is the rate,

and t is time.

Given: A = 80468, r = 0.20, and t = 2.

80468 = P (1.20)^2

P ≈ 55881

The sales 2 years ago was approximately $55,881.

Dunkin' Donuts' sales 2 years ago were $55,881.

A = P (1 + r)^t

where A is the final amount, P is the initial amount, r is the rate, and t is time.

A = 80468, r = 0.20, and t = 2.

80468 = P (1.20)^2

P ≈ 55881

The sales 2 years ago were approximately $55,881.

Sales are activities related to selling or the style of products sold in a given focused term. The shipping of a provider for a rate is likewise considered all through a sale.

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Answer: D. A restriction on when a union may call a strike.

Explanation:

A labor law is concerned with the establishment of labor relation framework that provides peaceful relations between the employees and the organization. It usually includes the rules for forming a union. In this condition the union of labor or workers become a bargaining agent and conducts strikes and lock-outs to fulfill it's needs and present their grievances to the authorities.

Answer:

The answer is D. A restriction on when a union may call a strike.

Explanation:

Answer:

stronger

Explanation:

A magnet can pull up a metal object because it is stronger than the gravitational force of the entire planet.

Answer:

4000 J

0.4 m

Explanation:

Kinetic energy is one half the mass times the square of velocity:

KE = ½ mv²

Given m = 0.05 kg and v = 400 m/s:

KE = ½ (0.05 kg) (400 m/s)²

KE = 4000 J

Work = change in energy

W = ΔKE

Fd = KE

(10000 N) d = 4000 J

d = 0.4 m

Answer:

Growths stock

Explanation:

Gradpoint verified

Answer:

32.5 m/s

Explanation:

Assuming the acceleration is uniform, the average velocity is simply the average of the initial and final velocities.

v_avg = (v₀ + v) / 2

v_avg = (25 + 40) / 2

v_avg = 32.5

Answer:

This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. In other words, if we increase the voltage, then the current will increase.

HOPE THIS HELPED!!!!!!!!!!!!!!XDDDDDD

Answer: [tex]6.9 (10)^{-4}[/tex]

Explanation:

When a number is written in scientific notation (representing the number using powers of base ten) it is expressed so that it contains a digit in the place of the units and all other digits after the decimal point, multiplied by the respective exponent.  

Then, the significant digits will be the digits that are before the power of ten.

In the case of [tex]0.00069[/tex]  we have to move the decimal point to the right and the power of base ten will be equal to the spaces moved to the right:

[tex]0.00069=6.9(10)^{-4}[/tex]

Jessica Kusher created a new material by b. mixing graphite, gypsum, and mica that could be painted on roof shingles.

This innovative formula aims to address two significant issues: reducing a home's cooling costs and potentially lowering ozone pollution in urban areas.

The material is notable for its environmentally friendly impact, focusing on making buildings more energy-efficient by reflecting more sunlight and thus reducing the amount of heat absorbed by the roofs.

This reduction in heat absorption could lead to a decrease in the energy required to cool buildings. The creation of this new material involved experimenting with different components to enhance its efficiency and effectiveness.

Full question:

How did Jessica Kusher create her new material?

a. harvesting rare minerals from deep-sea vents and combining them with organic polymers.

b. mixing graphite, gypsum, and mica that could be painted on roof shingles.

c. genetically engineering bacteria to produce a biodegradable substitute for plastic.

d. extracting nanoparticles from recycled plastic bottles and incorporating them into a concrete mixture for enhanced durability.

Answer:

a) 7200 ft/s²

b) 140 ft

c) 3.7 s

Explanation:

(a) Average acceleration is the change in velocity over change in time.

a_avg = Δv / Δt

We need to find what velocity the puck reached after it was hit by the hockey player.

We know it reached 40 ft/s after traveling 90 feet over rough ice at an acceleration of -20 ft/s².  Therefore:

v² = v₀² + 2a(x − x₀)

(40 ft/s)² = v₀² + 2(-20 ft/s²)(100 ft − 10 ft)

v₀² = 5200 ft²/s²

v₀ = 20√13 ft/s

So the average acceleration impacted to the puck as it is struck is:

a_avg = (20√13 ft/s − 0 ft/s) / (0.01 s)

a_avg = 2000√13 ft/s²

a_avg ≈ 7200 ft/s²

(b) The distance the puck travels before stopping is:

v² = v₀² + 2a(x − x₀)

(0 ft/s)² = (5200 ft²/s²) + 2(-20 ft/s²)(x − 10 ft)

x = 140 ft

(c) The time the puck takes to travel 10 ft without friction is:

t = (10 ft) / (20√13 ft/s)

t = (√13)/26 s

The time the puck travels over the rough ice is:

v = at + v₀

(0 ft/s) = (-20 ft/s²) t + (20√13 ft/s)

t = √13 s

So the total time is:

t = (√13)/26 s + √13 s

t = (27√13)/26 s

t ≈ 3.7 s

The average acceleration or the total time will be:

According to the question,

Velocity,

Acceleration,

(a)

As we know,

→     [tex]v^2=v_0^2+2a(x-x_0)[/tex]

By substituting the values, we get

→ [tex](40)^2=v_0^2+2(-20)(100-10)[/tex]

→     [tex]v_0^2=5200 \ ft^2/s^2[/tex]

→          [tex]= 20\sqrt{13} \ ft/s[/tex]

Now,

The average acceleration will be:

→ [tex]a_{avg} = \frac{\Delta v}{\Delta t}[/tex]

→         [tex]= \frac{20\sqrt{13}-0 }{0.01}[/tex]

→         [tex]= 2000\sqrt{13} \ ft/s^2[/tex]

→         [tex]= 7200 \ ft/s^2[/tex]

(b)

The distance will be:

→   [tex]v^2=v_0^2+2a(x-x_0)[/tex]

→ [tex](0)^2= 5200+2(-20)(x-10)[/tex]

→     [tex]0= 5200-40(x-10)[/tex]

→     [tex]x = 140 \ ft[/tex]

(c)

The time taken to travel 10 ft will be:

→ [tex]t = \frac{10}{20\sqrt{3} }[/tex]

     [tex]= \frac{\sqrt{13} }{26} \ s[/tex]

The time taken over rough ice will be:

→ [tex]v = at+v_0[/tex]

  [tex]0=-20t+20\sqrt{13}[/tex]

[tex]20t = 20\sqrt{13}[/tex]

   [tex]t = \sqrt{13} \ s[/tex]

hence,

The total time taken will be:

→ [tex]t = \frac{\sqrt{13} }{26} +\sqrt{13}[/tex]

     [tex]= \frac{27\sqrt{13} }{26}[/tex]

     [tex]= 3.7 \ s[/tex]

Thus the above answers are correct.    

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Greetings!

The correct answer choice is Choice 4.

Why?

In a scientific experiment the only thing being changed is the independent variable. Everything else should stay the same.

In this experiment, the independent variable is the amount of sunlight each plant should receive. Here's a tip- when looking for and independent variable look for whats being changed on purpose.

Hope this helps!

~Fluerie