The posted speed limit on the road heading from your house to school is 45 mi/h which is about 20 m/s if you live 8 km from school how long will it take you to get to school if there’s no traffic convert your answer in to minutes

Answer:

it have magnitude and direction is vector

it have magnitude but not direction is scalar

by multiplying ..... is magnitude

ny adding you get another vector

Explanation:

yeah I hope this helpa

Answer:

5.98 m

Explanation:

\(T=2\pi \sqrt\frac{L}{g}\)

\(T^2=4\pi ^2L/g\\L = gT^2/(4\pi^2)\) = 11.15*4.6²/(4π²) = 5.98 m

Answer:

12.5 m/s

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 0 m/s

Height (h) = 8 m

Final velocity (v) at 8 m above the lowest point =?

NOTE: Acceleration due to gravity (g) = 9.8 m/s²

The velocity of the roller coaster at 8 m above the lowest point can be obtained as follow:

v² = u² + 2gh

v² = 0² + (2 × 9.8 × 8)

v² = 0 + 156.8

v² = 156.8

Take the square root of both side

v = √156.8

v = 12.5 m/s

Therefore, the velocity of the roller coaster at 8 m above the lowest point is 12.5 m/s.

Steps to formulate a logical, reasonable perspective to any situation are: gather information, identify problem, analyze the situation, consider assumptions, generate solutions, evaluate options, consider your values, make decision and monitor and adjust

Here are the six questions that you can apply to formulating a logical, reasonable perspective to any situation:

What are the issues that should be addressed?

What are the relevant facts and data related to this problem or issue?

What assumptions am I making about the problem or issue?

What are the possible solutions or outcomes, and what are the pros and cons of each?

What are my values and priorities related to this problem or issue?

What additional information do I need to make an informed decision or come to a reasonable conclusion?

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Answer:

13.9 kJ

Explanation:

Given that

Length of the side, l = 1.8 m

Drag coefficient, C(d) = 1.4

Distance of run, d = 200 m

Velocity of run, v = 5 m/s

Density, ρ = 1.23

Using the Aerodynamics Drag Force formula. We have

F(d) = 1/2.ρ.A.C(d).v²

The Area, A needed is 1.8 * 1.8 = 3.24 m². So that,

F(d) = 1/2 * 1.23 * 3.24 * 1.4 * 5²

F(d) = 139.482/2

F(d) = 69.74

recall that, energy =

W = F * d

W = 69.74 * 200

W= 13948

W = 13.9kJ

Therefore, the thermal energy added to the air by the drag force is 13.9kJ

Answer and Explanation:

A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.

However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing. Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body.

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A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.

However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing.

Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body

I dont know you could start by asking your teacher, parent, and or siblings.

Ps the last part was a joke they never help.

Answer:

I think that perihelion is the point of the Earth's course that is close to the Sun. And i'm sure that aphelion in short is astronomy or otherwise the point in the orbit of a planet.

Explanation:

Hope this helps :)

Answer:

To solve this problem, we need to use the formula: calories burned = (power expended in watts x time in seconds) / 4.184 First, we need to find the power expended in watts. We can use the formula: power = force x velocity Assuming the cyclist weighs 75 kg, the force required to maintain a speed of 7.3 m/s on level ground is: force = mass x acceleration force = 75 kg x 0 m/s^2 (since the cyclist is not accelerating) force = 0 N Therefore, the power expended by the cyclist is: power = force x velocity power = 0 N x 7.3 m/s power = 0 W Now we can plug in the values into the calories burned formula: calories burned = (power expended in watts x time in seconds) /

Answer:

Explanation:

F = ma = 2.0(5) = 10 N

Two objects are held close together. When they are released, they move toward one another. The conclusion is supported by this evidence is  the objects have opposite charges.

An electric charge is a physical property that causes matter to experience a force when in close proximity to other electrically charged matter. There are two types of electric charges: positive and negative. Protons, which are positively charged, and electrons, which are negatively charged, are subatomic particles that make up matter.

In general, the protons and neutrons in the nucleus of an atom have a net positive charge, while electrons, which orbit the nucleus, have a net negative charge. The charges of these subatomic particles are indicated by the symbols "p" for proton, "n" for neutron, and "e" for electron.

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Answer:

The characteristics that determine how easily two substances change temperature are:

The volume and density of the substances and the amount of time they are in contact do not directly affect how easily they change temperature.

Explanation:

A. The work done by the gas enclosed in a cylinder equipped with a light, frictionless piston and maintained at atmospheric pressure, when 254 Kcal of heat is added to the gas, its volume increases slowly from 12.0 m³ to 16.2 m³ = 420 x 10³ kal.

B. The change in internal energy = 6.74 x 10⁵ Joule.

The concept of thermodynamics is an attempt to convert heat into energy, including the process of the flow of energy and the consequences produced by the transfer of energy.

The first law of thermodynamics is an example of the law of the conservation of energy. That is, energy cannot be created and cannot be destroyed. Energy can only change from one form to another. The first law of thermodynamics states that for every process if heat (Q) is given to the system and the system does work (W), there will be a change in internal energy (ΔU).

The equation is:

ΔE = Q + W

ΔU : change in internal energy (Joule)

Q: the amount of heat (Joule)

W: system work (Joule)

We have,

P = 10⁵ ⇒ atmospheric pressure

Q = 254 Kcal = 254 x 10³

ΔV = 16.2 m³ - 12.0 m³

= 4.2 m³

So, the work done by the gas:

W = PΔV

= (10⁵) (4.2)

= 420 x 10³ kal

And, the change in internal energy:

ΔE = Q + W

= (254 x 10³) + (420 x 10³)

= 6.74 x 10⁵ Joule

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Answer:

Workdone = 600 Kilojoules

Explanation:

Given the following data:

Time = 8 seconds

Power = 75,000 Watts

Distance = 58 m

To find the work done;

Power can be defined as the energy required to do work per unit time.

Mathematically, it is given by the formula;

\( Power = \frac {Energy}{time} \)

Thus, work done is given by the formula;

Workdone = power * time

Workdone = 75000 * 8

Workdone = 600,000 = 600 KJ

The option that represents what the magnetic field look like above the North pole is an arrow that decreases as we go up and points up (E)

The magnetic field lines of a magnet point away from the north pole and towards the south pole. The field lines are strongest at the poles and weaken as you move away from the poles.

So, the arrow that represents the magnetic field above the north pole will be pointing up, but it will become smaller and smaller as you go up.

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Approximate the instantaneous velocity by computing the average velocity of the car over the interval [1.95, 2.05] (i.e. the interval centered at t = 2 s with length 0.1 s).

By definition, average velocity is given by

v = ∆x / ∆t

So we have

v(2 s) ≈ (x(2.05 s) - x(1.95 s)) / (0.1 s) ≈ 13.94 m/s

The object distance of the lens is 10 cm and the image distance of the lens is 30 cm.

The object and image distance formed by the lens is calculated by applying the following lens formula.

v + u = 40 ------- (1)

v/u = 3 ------------ (2)

v = 3u

Substitute v into equation (1);

3u + u = 40

4u = 40

u = 40/4

u = 10 cm

The image distance = 3u

= 3 x 10 cm

= 30 cm

Thus, the object distance is 10 cm and the image distance is 30 cm.

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Answer:

obj A is making a parabolic path whereas object B is moving in a straight path . on going further the position of object A decreases whereas the position of object B goes on increasing

Answer:

These are called molecular compounds. ex. organic compounds like lipids or proteins.

The number of revolutions the tire makes in 6 s is

N = (58π)/(12π) = 4.83 rev.

What is revolutions?

Revolutions min physics is the study of the physical aspects of revolutions, including the forces and motions that cause them, the structures and systems that are produced in their wake, and the physical processes that lead to their initiation and termination. It has roots in the study of revolutions in the social sciences, but has developed its own principles and techniques to study physical phenomena related to revolutions. These techniques include the use of mathematical models, experiments, numerical simulations, and computer visualizations.

The linear velocity of a point on the tire's circumference is given by

v = (dπ)/t

where d is the diameter of the tire and t is the time.

Substituting d = 58 cm and t = 6 s, the linear velocity of a point on the tire's circumference is

v = (58π)/6 m/s.

The number of revolutions the tire makes in 6 s is given by

N = (v/2π)

Substituting v = (58π)/6 m/s, the number of revolutions the tire makes in 6 s is

N = (58π)/(12π) = 4.83 rev.

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The maximum speed with which a 1200- kg car can make a turn is 22.02 m/s.

v(max) = √μrg

where;

v(max) = √(0.55 x 90 x 9.8)

v(max) = 22.02 m/s

Thus, the maximum speed with which a 1200- kg car can make a turn is 22.02 m/s.

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The magnitude of the total displacement, in km, is 25.3 km, and  the direction of the displacement, measured in degrees west of north, is 125.76 degrees.

A. The magnitude of the total displacement, in km, is 25.3 km. This is calculated by using the Pythagorean theorem, where a2 + b2 = c2. The first two legs of the displacement are a and b, where a = 6.99 and b = 11.88. So,

a2 + b2 = 6.992 + 11.882

= 162.42 + 140.24 = 302.66.

The square root of 302.66 is 17.36. The third leg of the displacement is c, where c = 7.43. So, the total displacement is 17.36 + 7.43 = 24.79 km. Rounding to the nearest tenth, the magnitude of the total displacement is 25.3 km.

B. The direction of the displacement, measured in degrees west of north, is 125.76 degrees. This is calculated by using the Law of Cosines, where c2 = a2 + b2 - 2ab cos(C). The sides of the triangle are a = 6.99, b = 11.88, and c = 7.43. The angle C is the direction of the displacement, so we can solve for C in terms of a, b

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The boat must have moved, despite not being seen to move, because its relative position to the dock has changed. This phenomenon is known as relative motion .

Everything is always in motion, but the way we perceive it depends on our frame of reference.

In this scenario, the dock was the frame of reference for the initial position of the boat. When the boat moved to the cove, its position relative to the dock changed, and the dock was no longer an appropriate frame of reference. The boat's motion is now relative to the cove instead.

It is important to note that relative motion depends on the chosen frame of reference. If we were to choose the boat as the frame of reference, then it would be the dock that appears to move, not the boat. This is because motion is always relative to a chosen frame of reference.

In conclusion, the boat must have moved because its position relative to the dock changed. The concept of relative motion reminds us that motion is always relative to a chosen frame of reference, and that the way we perceive motion depends on our chosen frame of reference.

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Therefore, the initial speed of the ball must be 27.8 m/s to just clear the bar when kicked at an angle of 46.0 degrees.

Speed is a measure of how fast an object is moving, usually expressed as the distance traveled per unit of time. It is a scalar quantity, meaning that it has magnitude but no direction. The SI unit for speed is meters per second (m/s), although other units such as kilometers per hour (km/h) or miles per hour (mph) are also commonly used.

Here,

To solve part B, we can use the following kinematic equations:

y = yi + viyt - (1/2)gt² (vertical motion)

x = xi + vixt (horizontal motion)

where

y and x are the final vertical and horizontal displacements, respectively

yi and xi are the initial vertical and horizontal displacements, respectively (both are 0 in this case)

viy and vix are the initial vertical and horizontal velocities, respectively

g is the acceleration due to gravity (-9.81 m/s²)

t is the time of flight (the time it takes for the ball to reach the bar)

We want to find the initial velocity (v) that will allow the ball to just clear the bar, given an initial launch angle of 46.0 degrees above the horizontal. To do this, we can use the fact that the final vertical displacement (y) is equal to the height of the bar (10.0 ft = 3.05 m), and the final horizontal displacement (x) is equal to the distance from the ball to the bar (36.0 ft = 10.97 m).

y = 3.05 m

x = 10.97 m

θ = 46.0°

g = 9.81 m/s²

First, we can find the time of flight (t) by using the vertical motion equation:

y = yi + viyt - (1/2)gt²

3.05 m = 0 + visin(46.0°)*t - (1/2)(9.81 m/s²)*t²

Rearranging, we get a quadratic equation in t:

(1/2)(9.81 m/s²)t² - visin(46.0°)*t + 3.05 m = 0

Solving for t using the quadratic formula, we get:

t = [visin(46.0°) ± √((visin(46.0°))² - 4*(1/2)(9.81 m/s²)(3.05 m))]/(2(1/2)(9.81 m/s²))

We can ignore the negative solution, since time cannot be negative. Simplifying, we get:

t = [visin(46.0°) + √((visin(46.0°))² - 9.81 m/s²*3.05 m)]/4.905 m/s²

Now we can use the horizontal motion equation to find the initial velocity:

x = vixt

10.97 m = vicos(46.0°)*t

Substituting for t, we get:

10.97 m = vicos(46.0°)[visin(46.0°) + √((visin(46.0°))² - 9.81 m/s²*3.05 m)]/4.905 m/s²

Simplifying and solving for vi, we get:

vi = √(4.905 m/s² 10.97 m/[cos(46.0°)sin(46.0°) + √(sin²(46.0°) - 4(1/2)(9.81 m/s²)(3.05 m)/(vi²*cos²(46.0°)))])

= 27.8 m/s

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A photon is a tiny energy packet of electromagnetic radiation, also referred to as a light quantum.

1) Ultraviolet radiation is commonly used in sanitizing hospitals because, viruses, methicillin-resistant Staphylococcus aureus, and vancomycin-resistant enterococci are all susceptible to the germicidal effects of UV-C.

2) According to the photon theory, electrons that have been stimulated return to the ground state to create atomic emission spectra. Light or the photon is the energy that is released when electrons drop to a lower energy level.

3) To characterise the atomic characteristics of light, Albert Einstein used Planck's quantum theory.

Planck's hypothesis is supported by Einstein's demonstration that electromagnetic radiation, such as light, has both wave-like and particle-like properties.

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The 10/90 principle can be a powerful tool for taking control of your situation and improving your life. By taking responsibility for what you can change and focusing on your reaction to the situation, you can make positive changes in your life and become the master of your own destiny.

The 10/90 principle refers to the idea that life is made up of 10% of what happens to you and 90% of how you respond to it. In other words, you may not be able to control what happens to you, but you can control your reaction to it. By taking responsibility for what you can change rather than being a victim of what you cannot change, you can take control of your situation and improve your life.One example of a situation where the 10/90 principle could be applied is losing a job. Losing a job can be a devastating experience, and it can be easy to feel like a victim in this situation. However, by applying the 10/90 principle, you can take control of your situation and make positive changes in your life.The first step in applying the 10/90 principle in this situation would be to take responsibility for what you can change. This could mean updating your resume, networking with others in your field, and applying for new jobs. By taking action and doing what you can to find a new job, you are taking control of your situation and improving your chances of finding a new job.
The second step would be to focus on your reaction to the situation. Instead of dwelling on the negative aspects of losing your job, try to focus on the positive aspects. This could mean using the extra time to pursue a new hobby or spend more time with family and friends. By focusing on the positive aspects of the situation, you are taking control of your reaction and improving your overall well-being.
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Answer:Since pressure = force/area, the same force on a smaller area means more pressure. When you are walking on sand, the force being applied by your body is spread out over the entire surface of your foot. ... So, more pressure applied on a given area of your foot causes more pain.

Explanation:

Good Question

The answer of speed are:

1. Connor meets You and Steve at the M1-M7 MOL gas station in Budaörs. Teacher Watson is running after them.

2. Connor drove 73.3 km, You and Steve drove 78.3 km, and Teacher Watson drove 95.3 km.

3. Teacher Watson gets to Siófok first due to his higher speed.

What is speed?
Speed is the rate of motion, or the rate of change in position, of an object relative to a frame of reference. It is a scalar quantity that is measured in terms of distance traveled per unit of time. It is the magnitude of the velocity vector and is thus a scalar quantity. The average speed of an object over a certain period is the total distance traveled divided by the total time taken. Speed is also known as velocity, and it is a vector quantity that includes both the magnitude and direction of motion.

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Answer:

Power of 5 watts is used

Explanation:

Mechanical Work and Power

Mechanical work is the amount of energy transferred by a force.

Being F the force vector and s the displacement vector, the work is calculated as:

\(W=\vec F\cdot \vec s\)

If both the force and displacement are parallel, then we can use the equivalent scalar formula:

W=F.s

Power is the amount of energy converted per unit of time. The SI unit of power is the watt, equal to one joule per second.

The power can be calculated as:

\(\displaystyle P=\frac {W}{t}\)

Where W is the work and t is the time.

It's required to calculate the power used in t=30 seconds when W=150 Joules of work are completed. Substitute in the formula:

\(\displaystyle P=\frac {150}{30}\)

P = 5 Watt

Power of 5 watts is used