The reason that a police car's siren sounds HIGHER in pitch as it approaches you, is because the truck pushes the sound waves together so that the sound wavelengths in front of the truck gets shorter. This
causes the
A
Frequency to increase, which increases the pitch
B
Velocity to decrease, which increases the frequency
C
Frequency to decrease, which decreases the pitch
D
Wavelengths to get longer, which increases the pitch

The force required to displace the ideal spring by 4 m with a spring constant of 15 N/m is 60 N.

To calculate the force required to displace an ideal spring, we can use Hooke's Law, which states that the force exerted by a spring is directly proportional to its displacement. The formula is:

Force = Spring constant * Displacement

Given that the spring constant is 15 N/m and the spring is displaced by 4 m, we can calculate the force as follows:

Force = 15 N/m * 4 m = 60 N

Therefore, the force required to displace the spring by 4 m is 60 N.

Learn more about force

brainly.com/question/30507236

#SPJ11

Actually, every second of time sees a change in velocity of 10 m/s, which is a constant. When an object's velocity changes, it is referred to as accelerating; this implies that the object has an acceleration.

Velocity is the rate of change in direction of an object that is moving as measured by a specific standard of time and observed from a specific point of reference (for example, 60 km/h northbound).

According to the formula v = s/t, speed (v) is a scalar quantity that quantifies dislocation (or a shift in position, s), over change in time (t).

To know more about velocity visit:

https://brainly.com/question/28738284

#SPJ4

The motion of one particle of a gas is unaffected by the motion of other particles of the gas unless the particles collide.

Heat is the primary cause of particle motion on Earth. The temperature of any substance is correlated with the energy of the atoms and molecules that comprise it. Energy is conserved, thus if one particle loses energy, another one acquires it.

The components of matter are also continually in motion. They are energetic in motion. The kinetic theory of matter states that all matter is made up of particles that are constantly moving.

To know more about Motion of particles visit:

https://brainly.com/question/18728373

#SPJ10

The most common stars, known as red dwarfs, are difficult to observe because of their low luminosity, small size, and cool surface temperatures.

The most common stars in our universe are red dwarfs, which are small and dim compared to other types of stars. They emit most of their light in the infrared spectrum, making them difficult to observe with visible-light telescopes. Additionally, these stars are often surrounded by dust and gas that further obstructs our view of them. Red dwarfs also have long lifespans, so their evolution and behavior occur over much longer timescales than larger, more luminous stars. All of these factors make it challenging to study red dwarfs and understand their properties, despite their abundance in the universe.

More on  red dwarfs: https://brainly.com/question/14034412

#SPJ11

A balloon will stick to a wooden wall if the balloon is charged either positively or negatively.

This occurs due to the principle of electrostatic attraction. When the balloon is charged (either positively or negatively), it creates an imbalance of charges between the balloon and the wooden wall. This causes the charges in the wall to rearrange themselves to be opposite the charge of the balloon. As a result, the opposite charges attract, and the balloon sticks to the wall.

Electrostatic attraction is the force of attraction between two electrically charged objects or particles due to their opposite charges. When two objects with opposite charges come near each other, the electric field created by one object induces an opposite charge on the other object.

Learn more about electrostatic attraction:

https://brainly.com/question/16871517

#SPJ11

If a balloon is charged positively or negatively, it will adhere to a wooden wall.

The electrostatic attraction concept is what causes this to happen. There is an imbalance of charges between the balloon and the wooden wall when the balloon is charged, either positively or negatively. As a result, the charges in the wall are repositioned so that they are in opposition to the charge of the balloon. The balloon attaches to the wall as a result of the attraction between the opposing charges.

The force that draws two electrically charged objects or particles together due to their opposing charges is known as electrostatic attraction. When two items with opposing charges are brought close to one another, the electric field produced by one of the objects causes the other object to acquire the opposing charge.

learn more about electrostatic attraction here:

https://brainly.com/question/14889552

#SPJ11

When a person sings in a shower and causes the shower to resonate with a fundamental frequency of 73 Hz, this is an example of a standing wave, also known as a resonance.

The fundamental frequency of a standing wave is determined by the length of the resonant cavity, which in this case is the shower. The fundamental frequency is related to the length of the cavity by the equation:

f = v / 2L

where f is the frequency, v is the velocity of sound in the medium (in this case, air), and L is the length of the cavity. Given that the shower has a length of 2.40 meters and the fundamental frequency is 73 Hz, we can use the equation above to calculate the velocity of sound in air.

73 = v / (2 * 2.40)

Solving for v, we get:

= v

= (73 * 2 * 2.40)

= 350.4 m/s

The speed of sound in air is approximately 343 m/s at 20 °C at sea level. The velocity of sound in air can change with temperature, humidity and pressure. Given that the velocity of sound in air is around 343 m/s, the frequency of 73 Hz is a close match to the fundamental frequency of the shower with 2.40 meters high, It is important to note that the fundamental frequency is not the only frequency that could resonate in the shower, other overtones and harmonics might also resonate.

To know more about frequency please refer: https://brainly.com/question/3795295

#SPJ4

Question- Someone is singing in a shower that measures 2.40 meters from floor to ceiling, and notices their voice causes the shower to resonate with a fundamental frequency of 73 Hz. Here, this situation is an example of? justify. The given situation is an example of which physics phenomenon and justify the given example with some details.

Answer:

vibrates, and they carry energy from one place to another. Look at the sound wave and the water wave. vibrating electric charges and can travel through space where matter is not present. to particle, electromagnetic waves travel by transferring energy between vibrating electric and magnetic fields.

The potential energy is highest on a marble roller coaster at the highest point of the track.

The potential energy of an object is directly related to its height and its position relative to the reference point. In the case of a marble roller coaster, as the marble climbs up the track, it gains potential energy due to its increased height.

At the highest point of the roller coaster track, the marble reaches its maximum elevation, and thus, its potential energy is at its highest point.

As the marble moves downhill from the highest point, its potential energy decreases and is converted into kinetic energy, which is the energy of motion.

At the bottom of the track, where the marble reaches its lowest point, the potential energy is at its minimum because the height is at its lowest and the marble has converted most of its potential energy into kinetic energy.

The potential energy is highest on a marble roller coaster at the highest point of the track. This is where the marble reaches its maximum elevation and has the greatest amount of potential energy due to its height. As the marble moves downhill, its potential energy decreases and is converted into kinetic energy.

Learn more about the potential energy visit:

https://brainly.com/question/21175118

#SPJ11

The estimated demand for Week 4 is 36.3

MAD(Mean Absolute Deviation) is used to calculate the average difference between forecast values and actual values. It calculates the deviation by taking the absolute value of the difference between actual and forecasted demand. The formula to calculate Mean Absolute Deviation is:

MAD= Sum of| Actual demand - Forecast demand | / number of periods

In the given table, the Actual demand is shown as B and the forecast demand is shown as F.

B Actual Forecast 11 40 41 35 38 3 38 35 33 30

Calculation of MAD:

Actual (B) Forecast (F) |B-F|11 40 29.041 35 5.043 38 0.053 3 35.054 38 3.055 35 0.056 33 3.057 30 3.058 0.0 30.0Total 103.0

The number of periods is 9 as shown in the table.

MAD= 103/9MAD= 11.44

Mean Squared Error (MSE) measures the average squared difference between the actual and forecasted values. The formula for MSE is:

MSE= Sum of (Actual demand - Forecast demand)^2 / number of periods.

Calculation of MSE:

Actual (B) Forecast (F) (B-F)^2 11 40 841 35 25 625 38 0 0 3 35 484 38 0 0 35 33 4 30 0 900Total 2854

The number of periods is 9 as shown in the table.

MSE= 2854/9MSE= 317.1

Therefore, the calculated MAD is 11.44 and MSE is 317.1.

Trend Projection formula is given by:

Y = a + bx

where Y is the estimated demand for a particular period.

a is the Y-intercept

b is the slope of the regression line x is the period number

In the given table, the Week number is shown as X and the Actual demand is shown as Y.

Week number Actual Demand 11 24 22 29

Using trend projection for Week 3, we can calculate the demand as follows:

Slope (b) = (nΣ(xy) - Σx Σy) / (nΣ(x^2) - (Σx)^2) =(2*22 - 1*24)/(2*3 - 1*1) = 20/5 = 4

Intercept (a) = Σy/n - b(Σx/n) =(24+22)/2 - 4(2/2) = 23Y = a + bx = 23 + 4(3) = 35

Therefore, the estimated demand for Week 3 is 35.

Using trend projection for Week 4, we can calculate the demand as follows:

Slope (b) = (nΣ(xy) - Σx Σy) / (nΣ(x^2) - (Σx)^2) =(2*29 - 1*24)/(2*5 - 1*1) = 34/9 = 3.78

Intercept (a) = Σy/n - b(Σx/n) =(24+22+29)/3 - 3.78(2.0) = 21.5Y = a + bx = 21.5 + 3.78(4) = 36.3

Therefore, the estimated demand for Week 4 is 36.3.

Learn more about Trend Projection from the given link:

https://brainly.com/question/28559429

#SPJ11

Answer:

Hey Friend....

Explanation:

This is ur answer....

Hope it helps!

Brainliest pls!

Follow me! :)

Answer:

i cant see it just put the question

Explanation:

The angular separation of the two first order maxima can be found using the formula:θ = λ / dWhere λ is the wavelength of light, d is the distance between the slits, and θ is the angular separation between the two maxima.

Substituting the given values, we get:θ = (600 nm) / (0.080 mm) = 0.015°Therefore, the answer is (C) 0.015°.This formula is derived from the principles of interference in which light waves from the two slits interfere constructively at certain points on the screen, resulting in bright fringes or maxima. The distance between the maxima increases as the distance from the slits to the screen increases. The angular separation of the maxima depends on the wavelength of light and the distance between the slits.

Learn more about angular separation here:

https://brainly.com/question/13091205

#SPJ11

Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Frequency is defined as the number of repetitions of a wave occurring waves in 1 second. Its unit is Hz. Frequency is given by the formula as,

A moving car is targeted by radio waves sent from a radar gun by a police officer standing still.

The radio waves reflected off the vehicle and picked up by the radar gun have a greater frequency than the radio waves that were transmitted.

A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer.

Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Hence the higher frequency is the correct answer for blanks.

To learn more about the frequency refer;

https://brainly.com/question/14926605

#SPJ1

Answer:

B. 1.47 m/s

Explanation:

p = m × v

125 = 85 × v

85v = 125

v = 125/85

v = 1.47 m/s

Answer:

B and D

Explanation:

Both a CD and alarm clock have magnetic properties of metal alloys and polymers.

The gravitational force between them will change by a factor 1/9.

We need to know about gravitational force to solve this problem. The gravitational force is the force caused by two masses objects. The magnitude of gravitational force can be determined as

F = G.m1.m2 / R²

where F is the gravitational force, G is the gravitational constant (6.674 × 10¯¹¹ Nm²/kg²), m1 and m2 are the mass of the object and R is the radius.

From the question above, we know that

R2 = 3R1

By substituting the following parameters, we get

F2/F1 = G.m1.m2 / R2² / G.m1.m2 / R1²

F2/F1 = G.m1.m2 / (3R1)² / G.m1.m2 / R1²

F2/F1 = 1/9

For more on gravitational force at: https://brainly.com/question/19050897

#SPJ4

The slowing force of friction due to ice on the given sled on the ice is determined as 40 N.

The slowing force of friction due to ice can be determined by using Newton's second law of motion as follows;

F = ma

where;

F = 100 x 0.4

F = 40 N

Thus, the slowing force of friction due to ice on the given sled on the ice is determined as 40 N.

Learn more about force here: https://brainly.com/question/12970081

#SPJ1

The energy of a photon with a wavelength of 590 nm is \(3.36 * 10^-19\)

The energy of a photon can be calculated using the equation:

E = hc/λ

where E is the energy of the photon, h is Planck's constant \((6.626 * 10^-34 J.s)\), c is the speed of light\((3.00 * 10^8 m/s)\), and λ is the wavelength of the photon in meters.

To convert 590 nm (nanometers) to meters, we can use the conversion factor:

\(1 nm = 1 * 10^-9 m\)

So, \(590 nm = 590 * 10^-9 m\)

Plugging these values into the equation, we get:

E = \((6.626 * 10^-34 J.s * 3.00 * 10^8 m/s) / (590 * 10^-9 m)\)

E = \(3.36 * 10^-19 J\)

Therefore, the energy of a photon with a wavelength of 590 nm is \(3.36 * 10^-19\)

Learn about wavelength here https://brainly.com/question/24452579

#SPJ1

Answer:

1)limited system of government

2)representative system of government

3)individual rights system of government

Explanation:

the 3 basic concepts of government that the English brought with them to North America are listed in the answer

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. Explanation:

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction

Explanation:

In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.

Mixed wave frequencies presented together produce a phenomenon called interference, which can result in either constructive or destructive interference, depending on the alignment of the waves' phases.

Mixed wave frequencies presented together can produce interference patterns that can either amplify or cancel out certain frequencies. This is known as the principle of superposition. The resulting pattern is determined by the amplitude and phase of each wave. This phenomenon can be observed in a variety of natural phenomena, such as sound waves and light waves. In the case of sound waves, interference can lead to the creation of beats or harmonics, while in the case of light waves, interference can produce colorful patterns such as those seen in soap bubbles or oil slicks.
To know more about properties of sound waves, click here:-

https://brainly.com/question/8845912

#SPJ11

Answer:

a= -1.2 m/s^2

Vi= 6.5 m/s

Vf= 0 m/s

t= 0-6.5/-1.2= 5.45 Sec

Explanation:

Answer: 0

Explanation:

75 newtons will push back canceling it out make it 0

If I push on the wall with 75 Newtons of force, the wall will push back with 75 Newtons of force.

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

Learn more about force,here:

https://brainly.com/question/13191643

#SPJ3

Explanation:

First, convert terameters to meters.

234 Tm × (10¹² m / Tm) = 234×10¹² m

Now convert meters to nanometers.

234×10¹² m × (10⁹ nm / m) = 234×10²¹ nm

In scientific notation, that's 2.34×10²³ nm.

Answer:

One explanation may be that as a group, teenagers react more impulsively to threatening situations than do children or adults, likely because their brains have to work harder to rein in their behavior, a research team reported here yesterday at the Society for Neuroscience meeting

it's C

because the faster an object moves the more kinetic energy it has.

When all other factors are constant, the initial velocity determines the length of a projectile's trajectory.

A projectile is an object that is thrown or projected into the air and follows a path determined by the forces of gravity and air resistance. The length of a projectile's trajectory is determined by the time it takes for the projectile to reach its maximum height and the time it takes for the projectile to return to the ground. Initial velocity is the velocity at which a projectile is launched, and it determines the initial speed and direction of the projectile.

The greater the initial velocity, the farther the projectile will travel before hitting the ground, this is because the projectile spends less time in the air, so it has less time to slow down due to air resistance. In contrast, a projectile with a lower initial velocity will travel a shorter distance because it spends more time in the air and slows down more due to air resistance. Therefore, the initial velocity is a crucial factor that determines the length of a projectile's trajectory.

Learn more about gravity at:

https://brainly.com/question/29762388

#SPJ11

Answer:

carbon dioxide (what you are blowing up the balloon with) is a heavy gas. so when you fill the Balloon with it, the balloon will not float. helium is a light gas and floats. gravity takes another. part in this

Answer:

The nitrogen atom of an amine may be contained in a ring, a common feature of Nitrogen or oxygen atoms are the most common targets for protein methylation.

Explanation:

Answer:

a_max = 50 cm/s^2

Explanation:

To find the magnitude of the maximum acceleration of the particle, you take into account the equation of motion in a simple harmonic motion:

\(x=Acos(\omega t)\)

ω: angular velocity = 10 rad/s

A: amplitude = 5 cm

The acceleration is given by:

\(a=\omega^2 x\)

and the maximum acceleration is obtained when the cosine function is maximum, that is, when cos(wt) = 1. Then, you have:

\(a_{max}=\omega^2 x_{max}=\omega^2A\)

Then, you replace the values of w and A in order to calculate a_max:

\(a_{max}=(10rad/s)^2(5cm)=50\frac{cm}{s^2}\)

hence, the maximum acceleration is 50 cm/s^2