a car on a flat track travels at 31 m/s around a curve with a 53 m radius. what minimum coefficient of static friction between the tires and road is necessary for the car to round the curve without slipping?

Conventional method of heat transfer.​

How it works?

For example:

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Answer:

0.67 ms

Explanation:

The total time it takes the sound to enter and leave the water is t and

t = t' + t" where t' = total time of sound in air = d'/v' where d' = total distance sound travels in water = 2D (since the sound waves passes through the water twice )where D = distance travelled from water to surface of copper block = 0.45 m and v' = speed of sound in water = 1500 m/s and  t" = total time of sound in copper = d"/v" where d" = total distance sound travels in copper block = 2D' (since the sound waves passes through the copper block twice )where D' = thickness of copper block = 0.15 m and v" = speed of sound in water = 4600 m/s

So, t = t' + t"

t = d'/v' + d"/v"

t = 2D/v' + 2D'/v"

Substituting the values of the variables into the equation, we have

t = 2 × 0.45 m/1500 m/s + 2 × 0.15 m/4600 m/s

t = 0.90 m/1500 m/s + 0.30 m/4600 m/s

t = 0.0006 s + 0.000065 s

t = 0.000665 s

t = 0.665 ms

t ≅ 0.67 ms

Note that the sound wave passes through the water and copper block without refracting since it enters perpendicularly. Also, the sound wave passes twice through each of the copper block and water hence the total distance in each material is twice the initial distance or thickness.

Answer:

    t = 6.63 10⁻⁴ s

Explanation:

The speed of sound is constant in a given material medium, so to calculate time we can use the uniform motion relationships

           v = d / t

           t = d / v

the speeds of sound in the three media are

air            v = 343 m / s

water       v₁ = 1493 m / s

copper    v₂ = 5010 m / s

the distance traveled in the water on the round trip is

             d = 2 x

             d₁ = 2 0.45 0.90m

the time to travel this distance is

             t₁ = d₁ / v₁

             t₁ = 0.9 / 1493

             t₁ = 6.028 10⁻⁴ s

the distance in the copper

             d₂ = 2 0.15 m

             d₂ = 0.30 m

the time to travel this distance in copper is

              t₂ = d₂/ v₂

              t₂ = 0.30 / 5010

              t₂ = 5.988 10⁻⁵-5 s

the total travel time is

             t = t₁ + t₂

             t = 6.028 10⁻⁴ + 0.5988 10⁻⁴

             t = 6.6268 10⁻⁴ s

             t = 6.63 10⁻⁴ s

The given comment indicates because both net force as well as net torque are zero.

The word "force" has a particular meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains." Each thing experiences a force from another. There are both living things and non-living objects in the concept of a force.

Force is defined as the strength or energy directed towards any object for any movement or physical action. A push or pull that results from the interaction of two objects is known as a force. External force produces only results.

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The water will emerge from the tap with a velocity of 17.3 m/s.

To find the velocity at which water will emerge from the tap, we can use Bernoulli's equation, which states that the sum of the pressure energy, kinetic energy, and potential energy per unit volume is constant for an incompressible fluid flowing in a horizontal streamline. In this case, the pressure energy is given by the gauge pressure inside the tank, the kinetic energy is zero since the water is not moving initially, and the potential energy is determined by the height difference between the surface of the water and the tap.

By equating the initial and final energies, we can solve for the velocity of the water. Using the given values, we find that the water will emerge from the tap with a velocity of 17.3 m/s.

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Technology is the universe of tools, means, and methods through which we interact with our environment. [TRUE]

Apart from being divided into several types, technology will then provide many benefits in all fields.

1. Easy to receive information

The first positive side of technological development is the ease of receiving information, both locally and internationally. Unlike in the past, in this modern era, we don't have to bother buying newspapers.

2. Easy to communicate

With the messaging application that can send messages, both voice messages and text messages as well as telephone, which will then make it easier to communicate. Unlike the past, communication still has to be through letters and you have to send it to the post office. This letter cannot directly reach the recipient of the letter. It also requires quite expensive costs and takes a long time.

3. More Practical Shopping

In the past we had to go to the market or other shopping places and it took a long time. It's different from now, you can simply order various needs just by using an online shopping application. Then pay for it and wait for the order to arrive at home without the hassle of leaving the house.

4. Learning becomes easier

In the past we had to buy thick books and cost a lot. Right now you only need to buy ebooks, although not a few are paid, but there are many e-books that you can get for free. Besides being able to read books easily, the rapid development of technology will then facilitate the teaching and learning process. Especially during a pandemic like this. The benefits of this technological development are also very necessary for students and teachers who teach.

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Answer:

80 Percent

Explanation:

E=energy output/energy input×100

E=8000/10000×100

E=0.8×100

E=80 percent.

Mark brianliest if my answer suit your question

If the machine put, in 8000 J, and the user puts 10,000 J of work then the efficiency of the machine will be equal to 80%.

Work is a physics term used to describe the transfer of energy that takes place when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the force acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.

Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the force is applied at an angle with about the displacement.

As per the data provided in the question,

Total input energy = 10,000 J

Total output energy = 8,000 J

Then, the efficiency (η) of the machine will be,

η = (output energy/input energy) × 100

η = 8000/10000 × 100

η = 80%.

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Answer:

A microwave

Explanation:

Car

Lightbulb is a really good one

Same with the sun. That one has Chemical as well

Answer:

A stove

Explanation:it transfers heat

Answer:

Reaction force. An object at rest on a surface experiences reaction force.

Tension. An object that is being stretched experiences a tension force.

Friction. Two objects sliding past each other experience friction forces.

Air resistance.

Explanation:

Answer with Explanation:

Conntact forces: Frictional force, Muscular force etc

Non-contact : gravitational, electrostatic, and magnetic

I hope   im right!!

Answer:

Explanation:

A 60W bulb , consumes electrical energy of 60 J per second but it does not give out all the energy in the form of light . Most of the energy consumed by it is wasted in the form of heat . Only a fraction of energy is converted into light energy .

Hence, it is wrong to say that bulb supplies 60 J of light energy each second .

Answer:

324 J

Explanation:

KE= 1/2 m*v^2

1/2*8*9^2

324 joules (=^w^=) woof woof

A force of μk⋅60N is needed to keep a 60-newton rubber block moving across level, dry asphalt in a straight line at a constant speed.

Answer:

answers are located on the picture attached to this answer

Explanation:

If the number of particles twice, the average kinetic energy of molecules in an ideal gas also doubles.

Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible.

Everything we eat, drink, or use has energy. The inherent physiological processes of the body are fueled and controlled by energy. The more abrasive the environment, the more energy is required to maintain homeostasis, which is critical for cell and body tissue repair, muscle growth, and other functions.

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Answer:

The new force will be 4times the original

The speed of the tips of the blades is approximately 1200 meters per second or 4320 kilometers per hour.

To calculate the speed at which the tips of the wind turbine blades travel, we need to convert the frequency of rotation from revolutions per minute to radians per second. One revolution equals 2π radians, so 20 revolutions per minute would equal 20/60 x 2π = 2/3π radians per second.

The distance traveled by the tip of the blade in one revolution is equal to the circumference of the circle swept by the blade. This can be calculated using the formula C = 2πr, where r is the length of the blade. So, the distance traveled by the tip of the blade in one revolution is 2π x 55 = 110π meters.

Finally, we can calculate the speed at which the tip of the blade travels by multiplying the distance traveled in one second (i.e. the blade's circumference multiplied by the frequency of rotation in radians per second) by the conversion factor 1 meter per second = 1 radian per second x radius.

So, the speed of the tips of the blades is approximately (110π x 2/3π) x 55 = 1200 meters per second or 4320 kilometers per hour.

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The converse of the statement "No pilots are mechanics" is No mechanics are pilots.

Hence, the correct option is A.

The converse of a statement switches the subject and the predicate and negates both. In the original statement, the subject is "pilots" and the predicate is "mechanics."

The original statement states that there is no overlap between pilots and mechanics. In the converse statement, the subject becomes "mechanics" and the predicate becomes "pilots," and it still states that there is no overlap between the two groups.

Therefore, The converse of the statement "No pilots are mechanics" is No mechanics are pilots.

Hence, the correct option is A.

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Answer: 1702.8 km/h

Explanation:

The speed of the molecule in kilometers per hour (km/h) will be, {473x(3600÷1000)} km/h

= 1702.8 km/h

When you walk, you are more likely to be able to walk at a constant velocity. Your walking speed varies as you walk in real-life scenarios, but you aim to maintain a steady pace or velocity. This is how you can keep track of time and distance traveled.

When you walk at a constant velocity, you move forward with a steady speed and direction. The velocity is defined as the rate at which an object's position changes with respect to time. When you walk, you typically aim to move forward with a constant velocity, which is the speed at which you walk and the direction you walk. In certain situations, a constant velocity is ideal, such as when you are traveling long distances and want to arrive at your destination at a certain time. To ensure that you walk at a constant velocity, you need to maintain a steady pace by keeping your stride consistent and avoiding unnecessary stops or changes in direction. Walking with a constant velocity involves maintaining a steady speed and direction. It is possible to achieve this by maintaining a constant pace, keeping your stride consistent, and avoiding any unnecessary stops or changes in direction.

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The star Altair has a power output of about 4 × 1027 watts. This means that it produces as many joules of energy per second as 10.53 Suns and has a luminosity of  10.44 solar luminosities.

The power output of Altair, which is approximately 4 × 10^27 watts, indicates that it produces as many joules of energy per second as a large number of Suns. The specific number can be calculated by comparing it to the power output of the Sun.

The Sun has a power output of about 3.8 × 10^26 watts. Therefore, we can determine the number of Suns equivalent to Altair's power output by dividing the power output of Altair by the power output of the Sun:

Number of Suns = Altair's power output / Sun's power output = (4 × 10^27 watts) / (3.8 × 10^26 watts) ≈ 10.53

Hence, Altair produces as many joules of energy per second as approximately 10.53 Suns.

Additionally, the luminosity of Altair can be expressed in terms of solar luminosities by dividing its power output by the solar luminosity, which is approximately 3.828 × 10^26 watts:

Luminosity in solar luminosities = Altair's power output / Solar luminosity = (4 × 10^27 watts) / (3.828 × 10^26 watts) ≈ 10.44

Therefore, Altair has a luminosity of approximately 10.44 solar luminosities.

This comparison is made by dividing Altair's power output by the power output of the Sun and the solar luminosity, respectively, to determine the equivalent number of Suns and solar luminosities.

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Answer:

a)     1: 100  F₂ = 100 F₁,  b) P₁ = P₂   1:1

Explanation:

The pressure in a system is the same for a given horizontal line, therefore

          P₁ = P₂

where subscript 1 is for small piston and index 2 is for large piston 2

a) they ask the relation of the forces

pressure is defined by

        P = F / A

for the small piston

        P₁ = F₁ / A₁

the area of ​​the piston is

        A₁ =π r₁²

        P₁ = F₁ /π r₁²

for big piston

         P₂ = F₂ / A₂

in the exercise indicates that the diameter of the large piston is 10 times the diameter of the small piston

         A = π r₂²

         r₂ = 10 r₁

          r₂ = π 10² r₁²

we substitute

         P₂ = \(\frac{F_2}{ \pi \ 100 \ r_1^2}\)

we equalize the pressures

          \(\frac{F_1 }{ \pi \ r_1^2 } = \frac{F_2}{ \pi \ 100 r_1^2}\)

           F₁ = F₂ / 100

            F₂ / F₁ = 100

therefore the force ratio is

             1: 100

b) according to Pascal's principle for the same height the pressure is the same regardless of the shape of the container, therefore the pressure of the two pistons is the same

           P1 = P2

             1: 1

Answer:

When the motion of an object changes, the forces are unbalanced. Balanced forces are equal in size and opposite in direction. When forces are balanced, there is no change in motion.

Explanation:

The horizontal acceleration of the softball after she lets go of the ball is  0 m/s².

option B is the correct answer

During a projectile motion, the vertical acceleration of a projectile decreases as the projectile moves upwards and eventually become zero as the object reaches the maximum height.

As the object begins move downwards, the vertical velocity of the projectile increases and eventually becomes maximum before the object hits the ground.

During the horizontal motion of a projectile, the horizontal velocity of the projectile does not change. That is the initial horizontal velocity of the projectile equals the final horizontal velocity of the projectile.

a = v - u/t

where;

Since, final horizontal velocity = initial horizontal velocity

v = u

a = 0

In summary, the vertical velocity of the a projectile changes while the horizontal velocity does not change. This results in a zero horizontal acceleration of the projectile.

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One illustration of Balanced reciprocity is the kula ring. The Kula ring system of exchange, which can be found in the Trobriand Islands in the South Pacific, is one example of balanced reciprocity.

This type of reciprocity is also known as symmetrical reciprocity.

Balanced reciprocity requires the recipient to return items of equal value within a predetermined time frame. At the point when we expect that we will get an endowment of equivalent worth from somebody that we have given a gift, that is an illustration of adjusted correspondence.

A critical part of the adjusted correspondence is that without a response within a proper time period, the trade framework will waver and the social relationship could end.

Adjusted correspondence by and large happens at a social level more far off than the family, however, it generally happens among individuals who know one another.

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Answer:

4.    0.12mm

5:

a. screw gauge

b. caliper

Answer:

0.11 mm

vernier calipers

im not sure about the sure about B

Explanation:

Mass is an extensive physical property because it is dependent on the amount or quantity of matter present in a system.

Mass is a measure of the total amount of matter that is present in an object or substance, and it is directly proportional to the number of atoms or molecules that make up that object or substance.

Intensive properties, on the other hand, do not depend on the amount of matter present in a system. Examples of intensive properties include temperature, density, and specific heat. These properties remain constant regardless of the size or quantity of the sample.

In contrast, if you combine two objects, the total mass will be equal to the sum of the individual masses of the objects. This is what makes mass an extensive property. The more mass there is in a system, the more extensive the property becomes.

Therefore, mass is an essential parameter for describing many physical phenomena, such as momentum, energy, and force. It is an essential factor in the laws of physics, and it plays a crucial role in determining the behavior of objects in motion.

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Answer:

uaa,uag,uga

Explanation:

Answer:

The gravitational force on a mass is its weight. We can write this in vector form, where  

→

w

is weight and m is mass, as

→

w

=

m

→

g

.

In scalar form, we can write

w

=

m

g

.

Since  

g

=

9.80

m/s

2

on Earth, the weight of a 1.00-kg object on Earth is 9.80 N:

w

=

m

g

=

(

1.00

kg

)

(

9.80

m/s

2

)

=

9.80

N

Explanation:

The equations mentioned by Emily in the valuation analysis for Aspeon are as follows:

1) Equation (1): This equation represents the value of equity (S) and calculates it based on the EBIT (earnings before interest and taxes), the tax shield provided by debt (D), and the required return on debt (kd) and equity (ks). It implies that the value of equity is equal to the adjusted EBIT after deducting the tax shield from debt.

2) Equation (2): This equation calculates the total enterprise value (V) by adding the value of equity (S) and debt (D). It represents the total worth of the company, considering both equity and debt.

3) Equation (3): This equation calculates the price per share (P) by dividing the total enterprise value (V) minus the initial debt (D0) by the number of shares (n0). It represents the price per share based on the valuation of the company.

4) Equation (4): This equation calculates the new number of shares (n1) by subtracting the dividend (D) from the initial number of shares (n0) divided by the price per share (P). It represents the adjusted number of shares after the payment of dividends.

5) Equation (5): This equation calculates the levered value (VL) by adding the unlevered value (VU) with the tax shield value (TD). It represents the value of the company after considering the tax advantages of debt.

These equations provide a framework for valuation analysis, considering factors such as earnings, taxes, debt, and equity. They help assess the value and financial implications of Aspeon's growth prospects.

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Answer:

w = 1,662 rad / s,    v = 33.25 m / s

Explanation:

This this exercise indicates that the acceleration felt by the astronauts is

         a = 5.64 g

in a circular motion the centripetal acceleration is

        a_c = v²/ r

angular and linear variables are related

         v = w r

we substitute

        a_c = w² r

we finally have

         5.64 g = w² r

         w² = 5.64 g / r

let's calculate

         w = \(\sqrt{ \frac{5.64 \ 9.8}{20.0} }\)

         w = 1,662 rad / s

linear velocity is

        v = w r

        v = 1,662 20

         v = 33.25 m / s