Can you freeze sound waves

Electromagnetic radiation consists of particles called photons, each of which has a discrete amount, or quantum, of energy. However, since electromagnetic radiation also has wave properties, each particle is also characterized by a specific wavelength(m) and frequency (s-1).

What is wavelength?

A periodic wave's wavelength is the distance that its shape repeats. It is a feature of both travelling and standing waves, as well as other spatial wave patterns. It is the distance between two successive points on a wave that belong to the same phase, such as two nearby crests, troughs, or zero crossings. The spatial frequency is the reciprocal of wavelength. Lambda (λ), a Greek letter, is typically used to represent wavelength. The term wavelength is occasionally used to refer to all modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids.

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Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 1.45 × 275 = 398.75

We have the final answer as

Hope this helps you

The distance between the boy and the hill is 17 metersTo calculate the distance between the boy and the hill, we can use the formula: distance = (velocity × time) / 2.

Given that the velocity of sound in air is 340 m/s and the time taken for the echo to reach the boy is 0.1 seconds, we can substitute these values into the formula:

distance = (340 m/s × 0.1 s) / 2 = 34 m · s / 2 = 17 m.

This calculation is based on the assumption that the sound traveled from the boy to the hill and back, so the total distance traveled by the sound is twice the distance between the boy and the hill

. By dividing the total distance by 2, we can determine the actual distance between the boy and the hill, which in this case is 17 meters.

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The other object has a charge of -2.37 microcoulombs, since it experiences a repulsive force with the positively charged object.

The electrostatic force between two charged objects is given by Coulomb's law, which states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Therefore, we can use Coulomb's law to find the charge of the other object.

The equation for Coulomb's law is:

F = kq₁q₂ / r²

where F is the electrostatic force, k is Coulomb's constant, q₁ and q₂ are the charges of the objects, and r is the distance between them.

Substituting the given values, we have:

4.3x10⁵ = (9x10⁹) * (3.1x10⁻⁶) * q₂ / (1.2)²

Solving for q₂, we get:

q₂ = 2.37x10⁻⁶ C

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Answer:

15m/s

Explanation:

we know that

v = u + at

= 0+ 3*5

=15m/s

The temperature of 273.2 K is measured in the Kelvin scale, which is an absolute temperature scale where 0 K represents absolute zero (the lowest possible temperature).

The temperature of 0°C is measured in the Celsius scale, where 0°C represents the freezing point of water.

To compare these temperatures, we need to convert 0°C to the Kelvin scale:

0°C + 273.15 = 273.15 K

Now we have two temperatures: 273.2 K and 273.15 K.

Since 273.2 K is slightly higher than 273.15 K, we can conclude that the object with a temperature of 273.2 K is slightly hotter than the object with a temperature of 0°C.

In summary, the object with a temperature of 273.2 K is hotter than the object with a temperature of 0°C.

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The average speed is 47.8mi/h.

The overall distance the object covers in a given amount of time is its average speed. A scalar value represents the average speed. It has no direction and is indicated by the magnitude.

The formula for an object's general average speed is [Average Speed = Total Distance Traveled /Total Time Taken].

So, \(V_{av}\) = d / t

           = 215 / 4.5

           = 47.8mi/h

Therefore, average speed is 47.8mi/h.

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Answer:

51 miles/hour

Explanation:

Talia is on a road trip with some friends. in the first 2 hours, they travel 100 miles. then they hit traffic and go only 30 miles in the next hour. the last hour of their trip, they drive 75 miles. calculate the average speed of talia’s car during the trip. give your answer to the nearest whole number.

The average speed would be 51 miles/hour.

The average speed of a moving object is defined as the total distance traveled relative to the total time taken fro the journey. Mathematically, it is given as:

  total distance traveled/total time taken.

In this case;

Total distance traveled = 100 + 30 + 75 = 205 miles

Total time taken = 2 + 1 + 1 = 4 hours

Therefore;

Average speed = 205/4 = 51.25 miles/hour

To the nearest whole number = 51 miles/hour

We can see that the images show that the waves are moving towards each other hence they interfere constructively as shown in the first image or option A.

The term  wave has to do with a disturbance along a medium which transfers energy. We know that the wave could be transverse or longitudinal. A longitudinal wave is one in which the direction of the propagation is the same as that of the disturbance that is producing the wave.

The image that have been shown is that of the interference of waves. Recall that waves could interfere constructively  or destructively. The waves that interfere constructively tend to increase the magnitude of the disturbance while the waves that interfere destructively tends to cancel out each other.

Here, it is obvious that the interference of the waves is quite a constructive one as the disturbance increases clearly from the images shown.

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The radius of curvature of the convex mirror is 15.5 cm.

To solve this problem, we can use the mirror equation:

1/f = 1/\(d_o + 1/d_i\)

Where f is the focal length of the mirror, \(d_o\) is the distance of the object from the mirror, and \(d_i\) is the distance of the image from the mirror.

First, we need to find the original distance of the object from the mirror. We know that the child holds the candy bar 15.8 cm in front of the mirror, so \(d_o\)= 15.8 cm.

Next, we need to find the original height of the image. Since the mirror is convex, the image will be smaller than the object. We are told that the image height is reduced by one fourth, so the original height of the image is 4/3 times the reduced height. Let's call the reduced height \(h_r\), so the original height is:

\(h_o = (4/3)h_r\)

Now we need to find the distance of the image from the mirror. We can use the magnification equation:

M = -\(d_i/d_o = h_i/h_o\)

where M is the magnification of the mirror. We know that the image height is reduced by one fourth, so the magnification is:

M = \(h_r/h_o\) = 1/4

Substituting this into the magnification equation, we get:

-\(d_i\)/\(d_o\) = 1/4

Multiplying both sides by \(d_o\), we get:

- \(d_i\) = \(d_o\)/4 = 15.8/4 = 3.95 cm

Finally, we can use the mirror equation to solve for the focal length:

1/f = 1/\(d_o\) + 1/\(d_i\)

1/f = 1/15.8 + 1/3.95

1/f = 0.129

f = 7.75 cm

Therefore, the radius of curvature of the mirror is twice the focal length:

R = 2f = 15.5 cm.

So the answer is: The radius of curvature of the mirror is 15.5 cm.

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Answer:

1323

Explanation:

we know ,

weight = m*g

= 135 * 9.8 ( acceleration due to gravity in earth is 9.8 m/S2)

= 1323 N

a)The ball's potential energy changes as it moves from the release point to the top of the rebound.

b)The ball's potential energy is at its highest and rests when it is in the top position.

The potential energy is due to the virtue of the position and the height. The unit for the potential energy is the joule.

The potential energy is mainly dependent upon the height of the object.

Potential energy = mgh

The kinetic energy of the body is due to the virtue of motion.

According to the Law of Conservation of Energy, energy can neither be created nor destroyed but can be transferred from one form to another.

The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.

A ball dropped onto a trampoline returns to the same height after the rebound.

Hence, the ball's potential energy changes as it moves from the release point to the top of the rebound. When the ball is at the top position the potential energy is maximum and the ball is at rest.

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penguins! so momentum is based on mass and velocity, the advantages is that they have stored mass in the form of like fats to keep them warm however they are built to slide basically so that there is less friction when they travel so sideways their bullet like shape helps increase velocity so they have both mass and considerable velocity!

If the technician checks across an SPST switch that is in the "closed" position while working on a live electrical circuit of 120 volts, the electrical meter will indicate continuity or zero resistance, indicating that electricity can flow through the circuit.

When a technician checks across a Single Pole Single Throw (SPST) switch that is in the "closed" position on a live electrical circuit of 120 volts, the electrical meter will indicate the following:

1. Since the switch is in the "closed" position, it means the circuit is complete and current is allowed to flow through it.
2. The electrical meter, when connected across the switch, will measure the voltage drop across the switch.
3. As the switch is closed and has minimal resistance, the voltage drop across the switch will be negligible, so the meter will indicate a voltage reading close to 0 volts.

In summary, the electrical meter will indicate a voltage reading close to 0 volts when checking across a closed SPST switch on a live electrical circuit of 120 volts.

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The absence of any mechanical linkage between the throttle pedal and the throttle body requires the use of a . Stepper motor. Option D.

In modern vehicles, the throttle system is commonly controlled electronically using a stepper motor. A stepper motor is a type of electric motor that moves in discrete steps or increments, as directed by an electronic control unit (ECU) based on inputs from sensors, including the throttle pedal position sensor.

With the use of a stepper motor, there is no direct mechanical connection between the throttle pedal and the throttle body. Instead, the ECU interprets the position of the throttle pedal and commands the stepper motor to move the throttle plate accordingly, regulating the airflow into the engine.

The stepper motor provides precise control over the throttle position, allowing for smooth and accurate adjustments based on driving conditions and engine demands. The ECU can precisely control the throttle opening angle and adjust it in real-time, optimizing fuel efficiency, emissions, and overall engine performance.

Stepper motors are particularly suitable for this application as they can hold their position without power, provide precise control over angular displacement, and offer good torque characteristics.

They are commonly used in drive-by-wire throttle systems, where electronic signals replace mechanical linkages, providing improved responsiveness and integration with other vehicle control systems.

In summary, the absence of a mechanical linkage between the throttle pedal and the throttle body necessitates the use of a stepper motor for electronic throttle control, allowing for accurate and efficient regulation of the engine's air intake. So Option D is correct .

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x for a smaller magnet at the position marked zin

Explanation:

According to Newton's second law

\(\\ \sf{:}\dashrightarrow Force=Mass\times Acceleration \)

\(\\ \sf{:}\dashrightarrow Mass=\dfrac{Force}{Acceleration}\)

\(\\ \sf{:}\dashrightarrow Mass\propto \dfrac{1}{Acceleration}\)

Option C

For an object's sound to not be shifted in frequency, the object must be either stationary or moving directly towards or away from the observer at a constant speed.

The Doppler effect causes a change in the perceived frequency of the sound waves received by the observer, which can make the sound appear higher or lower in pitch depending on the direction of the relative motion.

To ensure that the sound from an object is not shifted in frequency, the object and the observer must have no relative motion with respect to each other. This means that the object must either be stationary with respect to the observer or moving directly towards or away from the observer at a constant speed.

If the object is moving towards the observer, the frequency of the sound waves will appear higher than the original frequency, but if the object is moving away from the observer, the frequency of the sound waves will appear lower than the original frequency

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Answer:

W = F × d

W = 15 × 3

W = 45 Joules

Answer:

Explanation:

This is a torque problem where balance is achieved when the sum of the torques equal 0. The equation for torque is

\(\tau=F*r\) where F is the force in Newtons that is perpendicular to the lever arm, and r is the length of the lever arm in meters.

450(2) = 350r and

\(\frac{450(2)}{350}=r\) so

r = 2.6 m

(a) Yes, our velocity changes because the direction is changing. (b) No, we do not accelerate.

(a) Velocity is a vector quantity that includes both magnitude (speed) and direction. When we round a curve and drive east, the direction of our motion changes.

Therefore, even if our speed remains constant, the velocity vector changes because it now points in the eastward direction instead of the previous direction.

(b) When the magnitude of the direction of the velocity is changed, we say that acceleration has occurred. In this scenario, although the direction of your velocity changes, your speed remains constant.

Since the rate at which velocity changes determines acceleration, there cannot be acceleration without a change in velocity.

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Answer:

its basically our universe

Explanation:

:) hope this helps

Answer:

Magnification is the degree to which an object is multiplyed to get it's image.

For example if an object size is 10cm an it's image size is 20cm then the magnification is 2, that is the image is twice the size of the object.

Hope that helps

Answer:

If I'm not wrong; I think the answer is A

Explanation:

A. Increasing kinetic energy

The force exerted by the muscle when lifting a 10 lb weight with the weight held 10 in from the shoulder axis and the muscle force arm 1 in from the shoulder axis is 100 lb.

Assuming that the formula being referred to is the one for calculating torque (T) which is given by T = F x d, where F is the force applied and d is the distance between the force and the pivot point (in this case the shoulder axis), and that f refers to the force exerted by the muscle, we can rearrange the formula to solve for f as follows:

T = F x d

Multiplying both sides by 1/d, we get:

T/d = F

Substituting the given values, we get:

T = 10 lb x 10 in = 100 lb-in

d = 1 in

Therefore, f = T/d = 100 lb-in / 1 in = 100 lb.

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The ideal gas that has a density of 9.66×10−7 g/cm3 at 1.00×10−3 atm and 80.0 ∘C is helium.

To identify the gas, we need to use the ideal gas law, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature. Rearranging this equation, we get n/V = P/RT. The density (ρ) of a gas is given by ρ = nM/V, where M is the molar mass of the gas.

Combining these equations, we get ρ = PM/RT, which allows us to calculate the molar mass of the gas.

Plugging in the values given for pressure, temperature, and density, and using the molar mass of helium (4.00 g/mol), we find that the gas is helium.

The gas with the given properties is helium.

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Answer:

Direct relation

Explanation:

When an object of mass m is moving with some velocity v, it will have kinetic energy. It is possessed by an object whenever an object is in motion. It can be given by the below formula.

\(E_k=\dfrac{1}{2}mv^2\)

It is very clear that the kinetic energy of an object is directly proportional to its mass. When the mass increases, its kinetic energy increases directly.

The car's acceleration is 8 m/s².

The car's acceleration can be calculated using the formula:

a = (v_f - v_i) / t

where a is the acceleration, v_f is the final velocity, v_i is the initial velocity, and t is the time taken.

In this case, the car starts from rest (v_i = 0) and reaches a final velocity of 32 m/s in 4 seconds. Substituting these values into the formula, we get:

a = (32 m/s - 0 m/s) / 4 s = 8 m/s²

Therefore, the car's acceleration is 8 m/s².

The rate of change of velocity about time is defined as acceleration. Because it is a vector number, it has both magnitude and direction. Meters per second square is the standard measure of acceleration.

When an it em accelerates, its velocity changes in magnitude, direction, or both. A positive acceleration indicates an increase in velocity, whereas a negative acceleration indicates a decrease in velocity. If an object's velocity is steady, its acceleration is zero.

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Answer:

Look below.

Explanation:

If additives are having negative effects on health and the environment, it would be wise to not use detergents containing these additives. These additives could threaten living things such as humans and animals.

There is concern that extra additives in detergents can have negative health and environmental impacts, then it would be very unwise to use detergents containing these additives

It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.

There are several types of pollution that exist in our nature depending on the state and composition of the contaminant, for example, water pollution can exist due to the eutrophication process.

It would be quite unwise to use surfactants that include these additional ingredients since there is fear that they might have a harmful influence on your well-being and the environment.

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