A banked circular highway curve is designed for traffic moving at 60 km/h. The radius of the curve is 200 m. Traffic is moving along the highway at 40 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to take the turn without sliding off the road

The maximum wavelength of light required to ionize a single sodium atom is approximately 243 nm.

To calculate the maximum wavelength of light required to ionize a single sodium atom, we need to use the equation:

E = hc/λ

Where E is the ionization energy (in joules), h is Planck's constant (6.626 x 10⁻³⁴ J s), c is the speed of light (2.998 x 10⁸ m/s), and λ is the wavelength of light (in meters).

First, we need to convert the ionization energy from kilojoules per mole to joules per atom:

496 kJ/mol x 1000 J/kJ / 6.022 x 10²³ atoms/mol = 8.24 x 10⁻¹⁹ J/atom

Next, we can rearrange the equation to solve for λ:

λ = hc/E

λ = (6.626 x 10⁻³⁴ J s)(2.998 x 10⁸ m/s) / 8.24 x 10⁻¹⁹ J/atom

λ = 2.43 x 10^-7 m

Finally, we can convert the wavelength from meters to nanometers:

λ = 2.43 x 10⁻⁷ m x 10⁹ nm/m = 243 nm

You can learn more about wavelength at: brainly.com/question/12924624

#SPJ11

Answer:

Explanation:

1.B

2.C

3.C

4.B

(1)  While still water is immobile, currents have their momentum.  the correct option is (D). (2) He was among the first to investigate the mechanics of the moving body. The correct option is (C). (3) One is in motion, as both the ball and the racquet add momentum. The correct option is (C). (4) The statement is true. The correct option is (A).

(1)

According to Newton's first law of motion, an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity unless acted upon by an external force. Swimming in a pool (enclosed water) is very motionless, and the swimmer can move through it with little interference from outside forces. In the ocean or in water with a current, however, the water itself is moving, and the swimmer must spend greater effort to overcome the force of the current and make progress.

Hence, the correct option is (D).

(2)

Leonardo DaVinci's work is important for anyone interested in body mechanics since he was among the first to conduct substantial research on human anatomy and the mechanics of the body in action. His anatomical drawings and analyses of muscles and joints provided important insights into how the human body works.

Hence, the correct option is (C).

(3)

Newton's third law of motion states that for every action, there is an equal and opposite reaction. When the tennis ball strikes the racquet, it exerts a force on the racquet, which in turn produces an equal and opposite force on the ball. When the racquet moves, it imparts momentum to the ball, causing it to travel further.

Hence, the correct option is (C).

(4)

Good form becomes a habit when you learn to lift weights with optimal body mechanics. Proper body mechanics in weightlifting reduce the danger of injury while increasing the efficiency and effectiveness of the workout. Good form becomes established in your muscle memory with repeated practice, making it simpler to perform the movements correctly over time.

Hence, the correct option is (A).

To learn more about force, here:

brainly.com/question/13191643

#SPJ3

The initial momentum of the alpha particle is approximately 1.45 x 10⁻¹⁹ kg m/s.

To determine the initial momentum of the alpha particle, we can use the formula form momentum:

momentum = mass * velocity

First, we need to find the velocity of the alpha particle using the kinetic energy formula:

kinetic energy = (1/2) * mass * velocity²

Given that the kinetic energy is 10 MeV (10 x 10⁶ eV), and 1 eV = 1.602 x 10⁻¹⁹ Joules, we can convert the kinetic energy to Joules:

10 x 10⁶ eV * 1.602 x 10⁻¹⁹ J/eV ≈ 1.602 x 10⁻¹² J

Now we can find the velocity. The mass of an alpha particle (2 protons and 2 neutrons) is approximately 4 * 1.67 x 10⁻²⁷ kg:

mass ≈ 6.68 x 10⁻²⁷ kg

Rearrange the kinetic energy formula and solve for velocity:

velocity = √(2 * kinetic energy / mass) ≈ √(2 * 1.602 x 10⁻¹² J / 6.68 x 10⁻²⁷ kg ≈ 2.17 x 10⁷ m/s

Now, we can find the initial momentum of the alpha particle:

momentum ≈ 6.68 x 10⁻²⁷ kg * 2.17 x 10⁷ m/s ≈ 1.45 x 10⁻¹⁹ kg m/s

Learn more about momentum here: https://brainly.com/question/30338108

#SPJ11

Answer:

A-first law

B-third law

C-second law

Explanation:

Answer: See Explanation

Explanation:

Did the car travel at a constant speed?

This means "Is the speed at each interval the same?"

There are 10 intervals for which to calculate from.

For each one, the speed is the distance traveled divided by the time.

Each interval is 1 meter long (distance).

1st: 1 meter / 2.00 s = 0.5 m/s

2nd: 1 meter / (4.00 - 2.00) s = 0.5 m/s

3rd: 1 meter / (6.2 - 4.0) s = 0.454 m/s

Right here you can see that the speed is different, NO is the answer.

Average Speed = total distance divided by total time

v = d / t     v = (10 m) / (20:00 s) = 0.5 (m/s)

Describe the overall motion: (continue on with step one to see the total motion over the 10 meters)

4th: 0.552

5th: 0.472

6th: 0.5

7th: 0.5

8th: 0.4975

9th: 5.39

10th: 0.55

Overall motion stayed steady from 0-2 meters, slowed for the 3rd meter, sped up for the 4th, slowed down the 5th, stayed steady until slowing down in the 8th meter, then increased speed til the 10th meter.

Races would be practical applications to see where people/cars pace themselves, push themselves, etc.

1. dependant variable

2. graph

3. model

4. experiment

6. scientific law

9. hypothesis

11. independent variable

12. theory

14. volume

15. society

Answer: False

Explanation:

The maximum velocity of the photoelectron is 3.9 x\(10^5\) m/s.

The maximum velocity of a photoelectron emitted from a surface can be calculated using the equation:
KE = hν - Φ
where KE is the maximum kinetic energy of the photoelectron, h is Planck's constant, ν is the frequency of the incident radiation, and Φ is the work function of the surface.

In this case, the wavelength of the radiation is given as 200 nm. We can use the formula c = λν to find the frequency, where c is the speed of light.
ν = c / λ = \((3 x 10^8 m/s) / (200 x 10^-^9 m) = 1.5 x 10^1^5 Hz\)
Substituting the values into the first equation, we get:
KE =\((6.63 x 10^-^3^4 J s)(1.5 x 10^1^5 Hz) - (5.0 eV)(1.6 x 10^-^1^9 J/eV) = 3.14 x 10^-^1^9 J\)
The maximum velocity can be found using the equation:
KE = 1/2\(mv^2\)
where m is the mass of the electron.
v = sqrt((2KE) / m) = sqrt\(((2 x 3.14 x 10^-^1^9 J) / (9.11 x 10^-^3^1 kg)) = 3.9 x 10^5 m/s\)
Therefore, the maximum velocity of the photoelectron emitted from the surface is 3.9 x\(10^5 m/s.\)

For more such questions on velocity, click on:

https://brainly.com/question/80295

#SPJ11

The initial separation d between the mass and the spring is 0.14m.

A m = 2.88kg mass starts from rest and slides a distance d down a frictionless θ = 34.7° incline. While sliding, it comes into contact with an unstressed spring of negligible mass. The mass slides an additional 0.185m as it is brought momentarily to rest by compression of the spring (k = 409N/m).

The initial separation d between the mass and the spring can be calculated using the equation:

d = (2*m*g*sin(θ)) / k

Substituting in the given values, we get:

d = (2*2.88kg*9.8m/s2*sin(34.7°)) / 409N/m

d = 0.14m

Therefore, the initial separation d between the mass and the spring is 0.14m.

To know more about initial separation, refer here:

https://brainly.com/question/12970890#

#SPJ11

Let's find the shortest distance possible

To calculate we need the length per division divide total length by divisions

Till 1 mm it can measure

To increase accuracy increase no of divisons

Answer:

D  

Explanation:

Answer:

Energy is released or absorbed

The process is reversible

Phase change can be described as:

The physical process of changing a medium's state from one to another is known as a phase transition (or phase change) in the domains of chemistry, thermodynamics, and other related sciences.

The phrase is frequently used to describe transitions between the three fundamental states of matter—solid, liquid, and gas—and, in rare instances, plasma.

The physical characteristics of a phase of a thermodynamic system and the states of matter are constant. Certain properties of a given medium change during a phase transition as a result of a change in the environment, such as temperature or pressure. This change can be discontinuous.

Hence, Phase change can be described as:

Energy is released or absorbed and the process is reversible.

Learn more about phase change here:

https://brainly.com/question/12390797

#SPJ2

The second law of thermodynamics states that the total entropy of a closed system always increases over time, unless work is done to reverse the process. The third law of thermodynamics states that it is impossible to reach absolute zero temperature through a finite number of finite-volume processes

1) Examples of heat and work in thermodynamics:

- Heat is energy transferred between two systems due to a temperature difference. Examples of heat include the absorption of sunlight by plants, the heat released during combustion, and the heat transfer from a hot stove to a pot of water.

- Work is the energy transferred to or from a system due to a force acting on it through a distance. Examples of work include the work done by an engine to move a car, the work done by an electric motor to spin a fan, and the work done by a weight lifter to lift a barbell.

2) Examples of heat in thermodynamics:

- The heat released during a chemical reaction, such as combustion or respiration

- The heat absorbed or released during phase transitions, such as melting or evaporation

- The heat transfer in a heat exchanger, such as in a refrigerator or air conditioning unit

- The heat transfer between a hot object and a cooler object, such as in cooking or heating a room.

3) Examples of work in thermodynamics:

- The work done by a piston pushing a gas in an engine

- The work done by a pump moving liquid from one place to another

- The work done by an electric motor turning a shaft to spin a machine

- The work done by a crane lifting a heavy object.

4) James Prescott Joule was a British physicist and brewer who lived from 1818 to 1889. He is known for his work in the field of thermodynamics, and for developing the concept of mechanical equivalent of heat. He discovered the relationship between heat and mechanical work, which is now known as Joule's first law. He also made important contributions to the study of the kinetic theory of gases and the nature of energy itself.

5) The formulas for the first, second, and third laws of thermodynamics are:

- First law: ΔU = Q - W, where ΔU is the change in internal energy of the system, Q is the heat added to the system, and W is the work done on the system.

- Second law: ΔS ≥ Q/T, where ΔS is the change in entropy of the system, Q is the heat added to the system, and T is the temperature of the system.

- Third law: As temperature approaches absolute zero, the entropy of a perfect crystalline substance approaches zero.

6) The second law of thermodynamics states that the total entropy of a closed system always increases over time, unless work is done to reverse the process. The third law of thermodynamics states that it is impossible to reach absolute zero temperature through a finite number of finite-volume processes, and thus there is always a minimum residual entropy in the system.

for more such questions on thermodynamics

https://brainly.com/question/13059309

#SPJ8

Answer:

The tabletop is smooth so my finger is down it fast and easy. The fabric however slowed my finger down considerably, and it was harder for me to move my finger across it.

Explanation:

Hope this helps.

The rug, carpet, or cloth offers more resistance to motion because of its rougher texture and higher friction.

Pushing on the surface: You'll probably experience some resistance when you push the plastic or wood over the surface. When compared to other surfaces, this opposition is, nevertheless, somewhat minimal. Since the tabletop often has a smoother surface, there is less friction. This makes it possible for the object to slide with very little resistance.

Pushing on a Rug, Carpet, or Piece of Fabric: In comparison to a tabletop, a rug, carpet, or piece of fabric will likely present you with substantially more resistance to your push. Since these surfaces typically have more texture and roughness, friction is enhanced.

In conclusion, the rug, carpet, or cloth offers more resistance to motion because of its rougher texture and higher friction, whereas the opposition to motion on the tabletop is often lower due to the smoother surface and lower friction. The difference in friction force between smooth and rough surfaces explains why items slide more readily on smooth surfaces. Friction has a significant impact on how things move and interact with various surfaces in daily life.

Hence, the rug, carpet, or cloth offers more resistance to motion because of its rougher texture and higher friction.

To learn more about Friction, here:

brainly.com/question/28356847

#SPJ3

1.44*10^-3N  is the force on each other. when 33 centimeters separates one charge from another charge. They both have charges of 1.2 x 10-5 coulombs.

Charge on the first sphere, q 1​ =1.2 x 10^-5  C

Charge on the second sphere, q 2 =1.2 x 10^-5  C

Distance between the spheres, r=30cm=0.3m

F= 4πε

​ q 1 q 2/  r2

​Where, ε 0

​ = Permittivity of free space 4πε 0

=9×10^9Nm2

F= (0.33) 2

1.2 x 10^-5 * 1.2 x 10^-5  C = 1.44*10^-3N

Hence, force between the two small charged spheres is 1.44*10^-3N.

The charges are of same nature. Hence, force between them will be repulsive.

learn more about Charge here:

https://brainly.com/question/14467573

#SPJ4

If a star remains at a constant size and temperature for a long period of time, it is most likely to be true that the star generates about as much energy as it radiates.

If a star remains at a constant size and temperature for an extended period, it suggests that the star is in a state of equilibrium. In such a state, the energy generated by the star's internal processes, such as nuclear fusion, is balanced by the energy radiated into space. This equilibrium is crucial for maintaining the star's stability and preventing it from expanding or contracting over time. If the star were to generate more energy than it radiates, it would accumulate excess energy and eventually experience an imbalance, causing changes in size, temperature, or both. Likewise, if the star generated less energy than it radiates, it would gradually deplete its internal energy reserves. Therefore, the most likely scenario is that the star generates about as much energy as it radiates, maintaining a steady state.

Learn more about energy radiated here:

https://brainly.com/question/14007126

#SPJ11

Answer:

a) KINETIC ENERGY   K = 0.045 J , b) POTENTIAL ENERGY  U = 0.196 J ,

c)  KINETIC ENERGY  K = 9.45 10⁵ J, d) POTENTIAL ENERGY ,    U = 41.16 J ,

e) POTENTIAL ENERGY  U = 154.84 J , f)  ENERGY IS POTENTIAL    U = 9.31 J

g) energy is POTENTIAL   U = 189.336 J

Explanation:

a) The ball is moving with a speed, so it has KINETIC ENERGY

          K = ½ m v²

          K = ½ 10 10⁻³ 3²

          K = 0.045 J

b) The ball is at a given height therefore it has POTENTIAL GRAVITATORY ENERGY

           U = m g y

           U = 10 10-3 9.8 2

           U = 0.196 J

c) The ball has speed so it has KINETIC ENERGY

           K = ½ m v²

           K = ½ 2,100 30²

           K = 9.45 10⁵ J

d) The baby carriage is at a height whereby the POTENTIAL ENERGY

           U = mg h

           U = 0.200 9.8 21

           U = 41.16 J

e) the concrete block is at a height that has POTENTIAL ENERGY

           U = m g h

           U = 0.790 9.8 20

           U = 154.84 J

f) the hood has height, the ENERGY IS POTENTIAL

           U = 0.190 9.8  5

           U = 9.31 J

g) The roller coaster has height and speed, therefore the mechanical energy has a scientific part and a potential part, in general the speed at the top of the mountain is very small, so we can consider that almost all the energy is POTENTIAL

The value they give allows calculating the potential energy

            U = 9.660 9.8 2

            U = 189.336 J

The answer to all the questions on potential energy and kinetic energy have been done below;

A) We are told that the ball is rolling. An object in motion has kinetic energy. Formula for kinetic energy is;

K =  ½mv²

We have; m = 10 g = 0.01 kg and v = 3 m/s

K = ½ × 0.01 × 3²

K = 0.045 J

B) We are told that the ball is held at a height. This means it is at rest and any object at rest has Potential Energy. Formula for potential energy is;

PE = mgh

We have; m = 10g = 0.01 kg and h = 2 m

PE = 0.01 × 9.8 × 2

PE = 0.196 J

C) Like in A above, the ball is in motion. Thus, it has kinetic energy.

K = ½ × 2.1 × 30²

K = 945 J

D) The baby carriage is sitting at rest and therefore has potential energy.

PE = 0.2 × 9.8 × 21

PE = 41.16 J

E) The toy car is in motion and has kinetic energy. Thus;

K = ½ × 1.12 × 4²

K = 8.96 J

F) The cinder block is sitting at rest and has potential energy. Thus;

PE = 0.79 × 9.8 × 20

PE = 154.84 J

G) The bell is at the top of the tower and is at rest and thus has potential energy.

PE = 0.19 × 9.8 × 5

PE = 9.31 J

g) The rollercoaster is at the top at rest and so has potential energy.

PE = 9.66 × 9.8 × 2

PE = 189.336 J

Read more at; https://brainly.com/question/18123782

Complete Question:

Light from the sun travels in electromagnetic waves. Which of these statements describe electromagnetic waves? Choose the 3 that apply.

Group of answer choices.

a) consist of transverse wave patterns.

b) can move through a vacuum.

c) caused by a vibration in a medium.

d) consist of longitudinal wave patterns.

e) requires a medium, such as air, to travel.

f) made of vibrating electric and magnetic fields.

Answer:

a) consist of transverse wave patterns

b) can move through a vacuum

f) made of vibrating electric and magnetic fields

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

Generally, the most commonly used electromagnetic wave technology in telecommunications is light and radio waves. Light from the sun travels in electromagnetic waves.

The statements which describe electromagnetic waves are;

I. It consist of transverse wave patterns.

II. It can move through a vacuum.

III. It is made of vibrating electric and magnetic fields.

Answer:

 α = 2.13 10⁻⁵ C⁻¹    ,  the closest material is ALUMINUM

Explanation:

The expression for thermal expansion is

          ΔL = α L₀ ΔT

temperatures are

         ΔT = 85 - 10 = 75 ° C

the length of the rod is L₀ = 125 m and L_f = 125.20 m

        ΔL = 125.20 - 125 = 0.20 m

        α = \(\frac{1}{L_o} \frac{\Delta L }{\Delta T}\)

        α = \(\frac{ 1}{125} \ \frac{0.20 }{75}\)

        α = 2.13 10⁻⁵ C⁻¹

When reviewing the table, the closest material is ALUMINUM

At a washing station at sea level, the water is pushed 408 meters uphill and flows out of a faucet at 45 meters per second.

According to the needs of the application, the discharge water is pressured. The water is pressurized to 3000psi to 5000psi for cleaning applications. They are extremely highly pressurized in the pressure ranges of 30000psi to 50000psi for cutting purposes. Water that must be pushed in a specific length of time is called a flow rate.

Wastewater or sewage is gathered at a pump station and kept there in a chamber. When the level of collected sewage reaches its maximum, a high-pressure integrated pump is used to lift the sewage through a discharge system. 

To know more about water pressure visit:-

https://brainly.com/question/15188101

#SPJ4

Answer:

All music in the world, is form only two notes and those notes are described below in detailed explanation.

Explanation:

In the chromatic scale, there are basically seven central musical notes, designated A, B, C, D, E, F, and G. They individual express a separate pitch or frequency. For illustration, the "central" A note has a pitch of 450 Hz, and the "common" B note has a pitch of 495 Hz.

Varieties Of Musical Notes You Require To Understand

Semibreve (Whole Note)

Minim (Half Note)

Crotchet (Quarter Note)

All music, listened to in the world, is from only twelve (12) notes.

A music can be defined as the systematic combination of an instrumental sound and human vocals, in order to produce harmonious tunes or sounds.

A note can be defined as a symbol which is used to denote a musical sound with respect to its pitch and duration.

Basically, all the music that are available and listened to in the world are typically produced from only twelve (12) notes.

This ultimately implies that, any musical piece that you may have come across in this world comprises only twelve (12) notes and these include:

Read more: https://brainly.com/question/20245998

After watching the Ted Talk, there were still a few questions that I had about supermassive black holes. Firstly, I wanted to know more about the event horizon and what it exactly entails. Although the speaker briefly touched upon this subject, I would have appreciated a more in-depth explanation. Additionally, I would have liked to know more about the role of supermassive black holes in the universe.

For such more question on supermassive

https://brainly.com/question/16470114

#SPJ8

Answer:

he is the first person can be 3in and a 6man is the best not a man of the hartford

a) Velocity is a vector quantity

e) Velocity is a speed with direction

=================================================

Explanation:

If we know the velocity of an object, then we know how fast it's going (speed) and where it's going (direction). It is a vector because the direction of the vector determines the direction, and the length of the vector (aka magnitude) determines the speed. So in a sense we've built in two facts of data into one visual.

An example of velocity: 10 miles per hour north. Here we have the speed of 10 mph and the direction north.

-------------------

Extra info:

a. Velocity is a vector quantity.

b.Velocity is a scalar quantity.  NOT

c. Velocity is the same thing as speed. NOT

d.Velocity is speed with net force.  NOT

e. Velocity is speed with direction.

The steepest angle to which a material can be piled without slumping/sliding downslope is referred to as the angle of repose.

The correct option is D.

The steepest angle of fall or dip in relation to the horizontal plane that a material may be piled to without collapsing is known as the angle of repose, or critical angle of repose, of a granular material. The materials on the slope face is almost ready to slide at this angle.

The design of particle material processing, storing, and conveying systems must take the angle of repose under consideration. The angle of repose is low when the grains are spherical and smooth. Its angle of repose is steep for extremely fine and adhesive materials.

To know more about Angle of repose visit:

https://brainly.com/question/13050269

#SPJ4

To raise the fundamental frequency by a perfect fifth, the tension must increase by a factor of 25.

Since the fundamental frequency of a spring is;

fo= 1/2l√T/M

fo = fundamental frequency

l = length

T = tension

M = mass in kilograms

The fifth overtone  frequency = 5fo

So, the fundamental frequency is proportional to the square root of the tension. Hence, to raise the fundamental frequency by a perfect fifth, the tension must increase by a factor of 25.

Learn more about fundamental frequency; https://brainly.com/question/25694821

Power is transmitted at high voltages because the corresponding current in the wires is lower.

According to the equation for power (P), which is given by P = VI, where V is the voltage and I is the current, power is directly proportional to both voltage and current. By increasing the voltage, the power can be maintained at a desired level while reducing the current.
When power is transmitted at high voltages, the current can be significantly reduced compared to transmitting the same amount of power at lower voltages. This has several advantages:
Reduced resistive losses: Lower current results in lower resistive losses in the transmission wires, as power loss in a wire is proportional to the square of the current (P_loss = I^2R). By reducing the current, the power loss due to wire resistance is minimized, leading to more efficient power transmission.
Reduced heating effects: Lower current reduces the heat generated in the transmission lines. This helps in preventing overheating and allows for longer distance transmission without excessive energy losses.
Thinner and more cost-effective wires: Lower current allows for the use of thinner wires, which are less expensive and easier to install. This helps reduce the overall cost and complexity of the transmission infrastructure.
Therefore, high voltage transmission systems are preferred to minimize losses, increase efficiency, and optimize the power transmission process.

To learn more about corresponding current
https://brainly.com/question/24435907
#SPJ11

Answer:

\(a = 0\ m/s^2\)

Explanation:

The acceleration of a body is defined as the change in velocity of an object, with respect to time. So, in order to produce and acceleration in any object, the velocity of that object must change. And, if the velocity of the object is not changing with respect to time, then the object is said to have a uniform motion. The acceleration of the object in such uniform motion is always zero. Because the change in velocity is zero.

\(acceleration = change in velocity/time\\acceleration = 0 / time\\acceleration = 0 m/s^2\)

Since, the car in this case is moving with a constant speed. Therefore, its acceleration will also be zero.

a = 0 m/s²