13.when adjusting the mirrors on your car doors you should be able to mainly see the sides of your vehicle.

The largest possible distance between speaker B and the observer at C is 1.37 m.

The largest possible distance between speaker B and the observer at C occurs when the difference in travel distances is just one half wavelength.

λ = v/f

λ = (343)/125

λ = 2.744

¹/₂λ = ¹/₂(2.744) = 1.37 m

Thus, the largest possible distance between speaker B and the observer at C is 1.37 m.

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The direction the pitcher throws the ball is (u) = +32 m/s, and the ball's velocity just after leaving the bat is +14.48 m/s.

When a pitcher throws a baseball, it moves in a straight line parallel to the ground.

The batter then hits the ball so that it travels in a straight line parallel to the ground and goes back to the pitcher along the same straight line.

The direction the pitcher originally throws the ball is defined as the +x direction.

As per the question, a pitcher throws a 0.145-kg baseball parallel to the ground with a speed of 32 m/s in the +x direction.

The bat applies an impulse of -8.4 N.s to the baseball.

We need to determine the ball's velocity just after leaving the bat.

Therefore, the initial velocity of the ball (u) = +32 m/s

The mass of the baseball (m) = 0.145 kg

Impulse applied by the bat (J) = -8.4 N.s

Now, we know that the formula for impulse is:

J = FΔt

F is the force applied

Δt is the time interval for which the force is applied.

Here, J = -8.4 N.s

We know that,  FΔt = m(v-u)

v is the final velocity of the ball.

v = u + (FΔt) / m

Substituting the given values, we get:

v = +32 + (-8.4 / 0.145)v = +14.48 m/s

Thus, the ball's velocity just after leaving the bat is +14.48 m/s (in the +x direction). Hence, the correct answer is +14.48 m/s.

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The lowest energy of electron in an infinite well is 1.2*10^-33J.

To find the answer, we have to know more about the infinite well.

                  \(E_n=\frac{n^2h^2}{8mL^2}\)

                \(m=9.1*10^{-31}kg\\L=0.050*10^{-3}m\\h=6.63*10^{-34}Js\\n=1\)

                \(E_1=\frac{(6.63*10^{-34})^2}{8*9.1*10^{-31}*(0.050*10^{-3})}=1.2*10^{-33}J\)

Thus, we can conclude that, the lowest energy of electron in an infinite well is 1.2*10^-33J.

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An object starts from rest to 20 m/s in 40 s with a constant acceleration.. The acceleration of the object is 0.5 m/s^2.

To find the acceleration of the object, we can use the equation of motion: v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.

Given that the object starts from rest (u = 0 m/s) and reaches a final velocity of 20 m/s (v = 20 m/s) in 40 seconds (t = 40 s), we can substitute these values into the equation and solve for acceleration. 20 = 0 + a * 40

Simplifying the equation, we have: 20 = 40a Dividing both sides of the equation by 40, we get: a = 0.5 m/s^2

Therefore, the acceleration of the object is 0.5 m/s^2. This means that the object's velocity increases by 0.5 m/s every second, leading to a final velocity of 20 m/s after 40 seconds of constant acceleration.

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Convert km to meters:

1km = 1000 m

1.5 km x 1000 = 1500 m

1500m / 4.8 m/s = 312.5 seconds

312.5 seconds / 60 seconds per minute =5.2 minutes = 5 minutes 12.5 seconds

Answer:

Explanation:

To find the amplitude of the sound, we must first determine the wavelength and the phase difference between the two speakers.

For the wavelength;

Recall that, the separation between two successive max. and min. intensity points are \(\dfrac{\lambda}{2}\)

Thus; for both speakers; the wavelength of the sound is:

\(\dfrac{\lambda}{2} = (10+30) cm\)

\(\dfrac{\lambda}{2} = (40) cm\)

λ = 80 cm

The relation between the path difference(Δx) and the phase difference(Δ∅) is:

\(\Delta \phi = \dfrac{2 \pi}{\lambda}\Delta x + \Delta \phi_o\)

where;

Δx = 10 cm

λ = 80 cm

Δ∅ = π rad

∴

\(\Delta \phi = \dfrac{2 \pi}{\lambda}\Delta x + \Delta \phi_o\)

\(\pi \ rad = \dfrac{2 \pi}{80 \ cm}(10 \ cm) + \Delta \phi_o\)

\(\pi \ rad = \dfrac{2 \pi}{8}+ \Delta \phi_o\)

\(\pi \ rad = \dfrac{ \pi}{4}+ \Delta \phi_o\)

\(\Delta \phi_o = \pi -\dfrac{ \pi}{4}\)

\(\Delta \phi_o = \dfrac{ 4\pi - \pi}{4}\)

\(\Delta \phi_o = \dfrac{ 3\pi}{4} \ rad\)

Suppose both speakers are placed side-by-side, then the path difference between the two speakers is: Δx = 0 cm

Thus, we have:

\(\Delta \phi = \dfrac{2 \pi}{\lambda}\Delta x + \Delta \phi_o\)

\(\Delta \phi = \dfrac{2 \pi}{\lambda}(0 \ cm ) + \dfrac{3 \pi}{4} \ rad\)

\(\Delta \phi = \dfrac{3 \pi}{4} \ rad\)

∴

The amplitude of the sound wave if the two speakers are placed side-by-side is:

\(A = 2a \ cos \bigg (\dfrac{\Delta \phi }{2} \bigg)\)

\(A = 2a \ cos \bigg (\dfrac{\dfrac{3 \pi}{4} }{2} \bigg)\)

\(A = 2a \ cos \bigg ({\dfrac{3 \pi}{8} } \bigg)\)

A = 0.765a

The expressions for sound interference allows to find the amplitude for the wave when the two speakers are together is:

Given parameters

To find

The interference phenomenon occurs when two coherent waves have paths of different lengths to reach a point, we have two extreme cases:

                        Δr = \(2n \ \frac{\lambda}{2}\)  

                        Δr = \((2n+1) \ \frac{\lambda}{2}\)  

Where Δr₁ and Δr₂ are the path difference, λ is the wavelength and n is an integer.

Let's start by looking for the wavelength that the speakers emit, see attached.

Destructive Interference       Δr₂ = (2n + 1) la / 2

Constructive interference    Δr₁ = 2n lam / s

Let's solve the system.

               Δr₂ - Δr₁ = \(\frac{\lambda}{2}\)  

Let's calculate

              30 - (-10) = \(\frac{\lambda}{2}\)  

              λ = 80 cm

Now we can use the general relation for the path change and the phase.

             \(\frac{\delta r}{\lambda } = \frac{\phi - \phi_o}{2\pi }\)

             \(\phi = \frac{\Delta r \ 2\pi }{\lambda } + \phi_o\)fi = Dr 2pi / lam + fio

Where \(\phi\) is the possible initial phase difference between the speakers.

Let's find the initial phase difference emitted by the two speakers, let's use destructive interference, for which the phase difference is:

             \(\phi = \pi \ rad\)  

Let's calculate

             \(\pi = \frac{2\pi }{80} \ 10 + \phi_o \\\phi_o = \pi - \frac{\pi}{4}\)

              \(\phi_o\)  = ¾ \(\pi\) rad

This value is kept constant, let's find the phase angle for when the speakers are together, so the path difference is zero Δr = 0      

            \(0= \frac{\phi - \phi_o}{2\pi }\\\phi = \phi_o\)

            \(\phi\) = ¾ pi

The amplitude of the sound wave is

            A = 2a cos \(\frac{\phi}{2}\)  

            A = 2a cos ⅜ π

           A = 0.765 a

In conclusion using the expression for sound interference we can find the amplitude for the wave when the two speakers are together is:

           A = 0.765a

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The acceleration of the object would be found to stay the same.

Let us note that the acceleration would have to do with the rate at which the velocity of the object would change with time. In the case that we have here, we can see that there is a point where the net force is the same as we can see on the graph.

We know that it is a change in the net force that is acting on the object that would cause the object to be accelerated as such if the net force stays as a constant then the acceleration of the object would also stay the same.

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Answer:

F = 70000  N

Explanation:

Given that,

Mass of a car, m = 1400 kg

Initial speed of the car, u = 15 m/s

Finally, it hits the ground, v = 0

Time, t= 0.3 s

We need to find the force experienced by the car. Using Newton's second law of motion to find it.

F = ma

a is acceleration of the car.

\(F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{1400\times (0-15)}{0.3}\\\\=-70000\ N\)

So, the force experienced by the car has a magnitude of 70000  N.

The balloon accelerates at a rate of 1.38 m/s2, and the bucket experiences a force of gravity of 9.8 m/s. In mechanics, acceleration is the rate at which an object's velocity with respect to time changes.

The vector quantity of accelerations (in that they have magnitude and direction). The direction of the net force imposed on an object determines its acceleration in relation to that force. A force in physics is an effect that has the power to alter an object's motion. A force can cause an object with mass to change its velocity, or accelerate (for example, moving from a condition of rest). Intuitively, a push or a pull can also be used to describe force.

F = MA = F/MA = 12000 + 500 /9000

a = 1.38m/s^2

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Answer:

Neil Armstrong was the astronaut

The water budget equation for the Creek drainage basin is: Precipitation = Stream discharge + Evapotranspiration ± Change in storage.

To develop the water budget equation for this problem, we need to account for the inputs and outputs of water in the Creek drainage basin. The water budget equation can be expressed as,

P = Q + ET ± ΔS

P = Precipitation input (mm)

Q = Stream discharge (m³/s)

ET = Evapotranspiration (mm)

ΔS = Change in storage (mm)

First, let's convert the units of the given values,

Precipitation input (P) = 550 mm

Stream discharge (Q) = 1.8 m³/s

Now, let's determine the evapotranspiration (ET) and change in storage (ΔS) terms. However, the problem doesn't provide information about ET, so we cannot calculate it accurately. The problem doesn't provide information about ΔS, so we cannot calculate it accurately.

Given these limitations, we can write the simplified water budget equation for this problem,

550 mm = 1.8 m³/s + ET ± ΔS

Please note that without information about evapotranspiration and changes in storage, we cannot fully determine the water budget for the Creek drainage basin.

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Net exports = Exports - Imports, which was found using the expenditures approach.

To compute net exports using the expenditures approach, we need to subtract the value of imports from the value of exports. This gives us the net amount of goods and services that a country has exported, after accounting for the value of goods and services that it has imported.

Net exports are an important component of a country's balance of payments and can have a significant impact on its overall economic performance.

To calculate net exports, we can use the following formula:
Net exports = Exports - Imports

By subtracting the value of imports from the value of exports, we can determine whether a country is a net exporter or a net importer of goods and services.

If exports exceed imports, then the country has a trade surplus and is a net exporter. On the other hand, if imports exceed exports, then the country has a trade deficit and is a net importer.

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Answer:

I do have a pet

Explanation:

his name is shadow and he's a cat

Answer:25

Explanation:

Formula(77°F − 32) × 5/9 = 25°C

Answer: The answer is C. 298 K

Explanation:

Fluid pressure is converted to mechanical motion by allowing the fluid to flow from an area of high pressure to one of lower pressure. The motion of that flow can be converted to useful work by any number of devices inserted into that flow. Among these are various kinds of wings, turbines, and engines.

The second law of thermodynamics says that the entropy of a system is non-decreasing. In terms of fluid flow, that means a fluid will always flow from an area of high pressure to one of low pressure. The flow (mechanical motion) is a consequence of a difference in the fluid's pressure.

Bernoulli's principle tells us that within a horizontal flow, areas of higher-speed flow will have a lower pressure than areas of lower-speed flow. This principle is the basis for the operations of wings, sails, propellers, turbines, and similar devices that create differences in flow rate based on their shape. The shape is designed to cause the flow rate over one surface to be greater than over the other surface, creating a difference in pressure that is used to move the surface. Hence the wing converts fluid pressure to mechanical motion.

The wing of an airplane moves the plane vertically, putting or keeping it in the air. A sail is arranged so the fluid pressure is converted to motion in the desired direction, which direction can even be a few degrees off of "up wind" of the flow. A turbine is a collection of "wings" that are arranged so their motion rotates a shaft.

A cylinder consists of a barrel, a piston, and a piston rod. The barrel is where the fluid is contained. The piston is placed within the barrel, and is arranged so that it moves when fluid pressure is applied. The piston rod is a link between the piston and the point at which the movement is converted to useful work.

The piston rod itself may do the desired work of pushing, pulling, lifting or lowering, or it may be connected to a crankshaft to convert the linear motion to rotary motion.

The working fluid in a cylinder may be gas or liquid, including steam, the gas produced by a chemical reaction, water, or hydraulic fluid. Its flow and effect on the piston may be controlled by various valves.

We will have the following:

The labeled point in the diagram represents a trough.

Explanation:

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Answer:

Is correct option

Explanation:

In option a:

In option b:

In option c:

In option d:

By this we can conclude that only option b is correct.

Answer:

The net force on biker 2 is greater than on biker 1

Explanation:

Apex;)

Answer:

D. The net force on biker 2 is greater than on biker 1

Explanation:

The given function is f(t)=t3(1−2t2)The velocity of a particle is represented by the derivative of the position of the particle with respect to time. Thus, we need to find the derivative of the given function f(t) to find the velocity of the particle.

Let us differentiate f(t) by using the product and chain rule of differentiation:f(t)=t3(1−2t2)⇒ f′(t)=3t2(1−2t2)+t3(−4t)⇒ f′(t)=3t2−6t4−4t4The velocity of the particle at any given time is the absolute value of the derivative of the position function at that time. Thus, to find the velocity of the particle at t = 1, we will substitute t = 1 in the derivative function:f′(1)=3(1)2−6(1)4−4(1)4=3−6−4=−7.

Therefore, the speed of the particle at t = 1 is 7, which is option C).The definition of speed and velocity:Speed is the magnitude of velocity. It can be calculated as follows:|v|=|dx/dt|Where v is velocity, and x is the position of the object. The absolute value of the velocity of the particle is the speed of the particle.

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A plastic rod can be given an electrostatic charge through a process called charging by friction or rubbing. Here's how it works:

Select a plastic rod: Choose a plastic rod made of a material that is known to acquire an electrostatic charge easily, such as polyethylene or polypropylene. Rub the rod: Take a dry cloth or another material with a different electrostatic affinity, such as wool or fur. Hold the plastic rod firmly and rub it vigorously against the cloth or fur. Make sure to rub the entire length of the rod. Transfer of charges: During the rubbing process, electrons are transferred between the plastic rod and the cloth or fur. This transfer of electrons creates an imbalance of charges on the rod's surface, resulting in an electrostatic charge. Test for charge: Once you have rubbed the rod sufficiently, you can test its electrostatic charge. Bring the charged rod close to a small piece of paper or a lightweight object, and you should observe an attractive or repulsive force between the rod and the object due to the electrostatic charge. It's important to note that the type of charge acquired by the plastic rod will depend on the electrostatic affinity of the materials involved in the rubbing process. If the rod gains electrons during rubbing, it will acquire a negative charge, and if it loses electrons, it will acquire a positive charge.

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Radio waves and microwaves have in common is c. Both are at the side of the spectrum that has the lowest frequency.

This means that they have longer wavelengths compared to other types of electromagnetic radiation, such as visible light, ultraviolet light, or gamma rays. Due to their lower frequencies, radio waves and microwaves typically have less energy than other forms of radiation on the electromagnetic spectrum.

Despite their differences in frequency and wavelength, both radio waves and microwaves play important roles in modern technology, as they are utilized for communication, navigation, and even cooking in the case of microwaves. In summary, radio waves and microwaves share a key feature: they are both situated at the side of the electromagnetic spectrum that has the lowest frequency, which in turn results in longer wavelengths and lower energy levels. So the correct answer is C. Both are at the side of the spectrum that has the lowest frequency.

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Answer:

0.88 N / C

Explanation:

Given :

Charge ( q ) = 1.7 C

Force ( F ) = 1.5 N

We have to find electric field ( E ):

We know:

E = F / q

= > E = 1.5 / 1.7 N / C

= > 0.88 N / C

Hence we get required answer!

Answer:

I = 16amp

Explanation:

Charge coulomb ( Q ) = It

Where I =current in ampere

t = time = 5 seconds

80 = I × 5

I = 80/5

I = 16amp

The current through the circuit will be I = 16amp

Signals generated by transducers are normally of the order of microvolts to millivolts.

What are transducers?

Transducers are electrical components that transform energy from one form into another. They are electrical sensors that generate an electrical signal based on the quantity being assessed.

A transducer is a device that transforms a physical quantity such as force, pressure, or temperature into an electrical signal. This electrical signal can then be amplified, filtered, or measured in other ways.

Some common examples of transducers include microphones, strain gauges, accelerometers, and thermocouples.

What are the signals generated by transducers?

The signals generated by transducers are normally of the order of microvolts to millivolts. The magnitude of the signal generated depends on the quantity being assessed, as well as the type and sensitivity of the transducer.

In order to use the signal generated by a transducer, it is usually necessary to amplify and filter the signal to remove noise and unwanted frequencies. This can be done using an amplifier or other signal processing equipment.

Overall, the signals generated by transducers are a crucial part of many electronic systems and are used in a wide variety of applications.

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Answer  is approximately 3.00 x \(10^8\) meters per second.

The equation that links the maximum electric field (Emax) and the maximum magnetic field (Bmax) of a photon of light is given by:

Emax = c * Bmax

where:

- Emax is the maximum electric field amplitude,

- Bmax is the maximum magnetic field amplitude,

- c is the speed of light in vacuum.

According to Maxwell's equations, in a vacuum, the electric and magnetic fields in an electromagnetic wave, such as a photon, are related to each other by the speed of light (c), which is approximately 3.00 x\(10^8\) meters per second. The equation above expresses this relationship, stating that the maximum electric field amplitude is equal to the speed of light multiplied by the maximum magnetic field amplitude.

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Answer:

NO

Explanation:

if it has no acceleration then it's not moving

Answer:

Yes when the velocity is constant then the acceleration is said to be zero. Thus an object with 0 acceleration can be in motion.

Let me give you an example to make you more clear

Example:

When  a car is  traveling at a constant 90 km/h in a straight line has nonzero velocity and zero acceleration.

Answer:

The amount of energy needed to melt the ice is 1670 J

hope it helpss!!!

An object's mass remains unchanged everywhere while the weight of an object depends on gravity, it is a measurement of how much gravity has an impact on an object. Therefore, an object’s mass, rather than its weight is used to indicate the amount of matter it contains.

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Answer:

First, the meters is the unit used in almost all the world today.

Then using meters as your unit will be easier to read and interpret for a larger number of people than if you use an older system, like hands or steps.

And because of the fact that almost all the world uses the meter as the unit for length, almost all the equations and formulas are written in meters.

Precision: The meter is exactly defined as:

"The length of the path traveled by light in a vacuum in 1/299,792,458 of a second"

So the meter is an exact (and accepted) unit.

Then using this unit for measures of length also provides some " legitimacy" for you measure.