a car approaches a train station with a speed of 30 m/s . a stationary train at the station sounds its 167- hz horn.
what frequency is heard by the driver of the car?

The conductivity of a material is determined by the number of free electrons. Insulators have few or no free electrons.

The insulators are composed of a few electrons and only a tiny amount of electrical current can pass through them. The wires, however, make for superior electrical conductors. In contrast to metal, which is a very excellent conductor, rubber is a poor insulator.

A few electrons make up the insulator, which allows very little electrical current to pass through it. While the wires are excellent electrical conductors. Rubber is a poor insulator while metal is a very excellent conductor.

As a result, the conductor has been used for wiring and can be efficiently converted to use energy. Because the insulator is a weak absorber, energy cannot be transferred.

Therefore, the correct answer is insulators.

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Answer:

Hello There!!

Explanation:

The answer is=>Conduction.

hope this helps,have a great day!!

~Pinky~

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Conduction.

Answer:

Principle of conservation of linear momentum is state as provided no external force acts on a system of colliding bodies the total linear momentum of the bodies (in a given direction) remains constant

The average velocity and average speed of each swimmer (Jack and Jill exercise in a 25.0 m long swimming pool):

1. Jack

Average velocity = 0.162 m/s

Average speed = 1.46 m/s

2. Jill

Average velocity = 0 m/s

Average speed = 1.62 m/s

The amount of distance an object travels in a given amount of time is measured as velocity. Here's a word equation that expresses the relationship between time, distance, and velocity:

Distance traveled divided by time to arrive equals velocity.

Jack's speed = (9 x 25.0) / (2 min and 33.9 s)

= 1.46 m/s

Jill's speed = (10 x 25.0) / (154.5 s)

= 1.62 m/s

Jack's displacement = 25 meters

Hence,

Jack's velocity = (25 / 154.5) = 0.162 m/s

Jill's displacement = 0 meters

Jill's velocity = 0 / 154.5

= 0

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A sequence diagram is a type of UML (Unified Modeling Language) diagram that shows the interactions between objects or components of a system as they occur in a chronological sequence.

It is a graphical representation of the interactions that take place between objects or components of a system, depicting the order of messages that are exchanged between them.

Sequence diagrams are used to visualize the flow of a system's functionality, as well as the communication and collaboration between the various components of the system. They are especially useful in understanding complex systems and identifying areas that may require improvement or optimization. Sequence diagrams are also often used to document and communicate the design of a system to stakeholders or development teams.

In summary, a sequence diagram shows the timing of interactions between objects or components of a system as they occur. It is a valuable tool in understanding and communicating the behavior and functionality of complex systems.

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Answer:

\(c. \: organ\)

Answer:

C.

Explanation:

0.5 moles CH2OH produces 1 mole of H2O, thus 0.5 moles of CH2OH produces 0.5 moles of H2O.

From the chemical equation given below, we can write the balanced chemical equation for the reaction:

CH2OH + 3O2 → 2CO2 + 3H2O

We can see that for every 1 mole of CH2OH, 3 moles of O2 are needed to produce 3 moles of H2O.

Since the reactants are present in equal amounts, we can assume that 0.5 moles of O2 will be consumed by the 0.5 moles of CH2OH.

Now, 0.5 moles of CH2OH will produce 1 mole of H2O, since the stoichiometric ratio of CH2OH to H2O is 1:1.

Therefore, the number of moles of H2O produced will also be 0.5 moles.

In order to calculate the mass of H2O produced, we need to use its molar mass. The molar mass of H2O is 18.015 g/mol.

Therefore, the mass of H2O produced will be:

0.5 moles x 18.015 g/mol = 9.008 g

Therefore,

9.008 g of H2O will be produced when 0.500 moles of CH2OH reacts with 0.500 moles of O2.

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Answer:

F. jumping

Explanation:

you can't throw/toss yourself, you cant roll over water, catching?, you cant run over water, jumps are bigger than hops

When linked to the same source, a thick wire will conduct current more readily than a thin wire of the same material.

Because a thin wire has fewer electrons available to conduct the current, its resistance is higher than that of a thick wire. Resistance and the area of a wire's cross section are inversely proportional to one another.

Although there is increased electrical resistance, the tiny wire can nevertheless conduct electricity. The four lane roadway is like the thicker wire. Because there is far less electrical resistance, the lightbulb burns brighter as a result.

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The speed of the ball bearing before the collision was: 1.75 m/s.

We can use the principle of conservation of angular momentum to solve this problem. Initially, the angular momentum of the system (clay cylinder + potter's wheel) is:

L1 = I1 * ω1

where I1 is the moment of inertia of the clay cylinder, and ω1 is its angular velocity.

When the ball bearing is thrown and sticks to the clay, the system's angular momentum changes due to the external torque exerted by the ball bearing. The change in angular momentum is:

ΔL = r * p * sin(θ)

where r is the radius of the cylinder, p is the linear momentum of the ball bearing before the collision, and θ is the angle between the normal to the clay surface and the direction of p. Since the ball bearing is thrown horizontally, θ = 60°.

Since the ball bearing sticks to the clay, the final system consists of a larger cylinder with a mass of 23.182 kg (23.0 kg clay cylinder + 0.182 kg ball bearing) and a new moment of inertia I2. The final angular velocity is ω2.

The conservation of angular momentum principle can be expressed as:

L1 + ΔL = I2 * ω2

Solving for the initial linear momentum p, we get:

p = (I2 * (ω2 - ω1)) / (r * sin(θ))

To find I2, we can use the formula for the moment of inertia of a solid cylinder:

I2 = (1/2) * M * R^2

where M is the mass of the larger cylinder and R is its radius. Since the clay cylinder and ball bearing stick together, their combined radius is still 19.0 cm.

Substituting the given values, we get:

I2 = (1/2) * (23.182 kg) * (0.19 m)^2 = 0.328 kg*m^2

To find ω2, we can use the fact that the final angular velocity is half the initial angular velocity:

ω2 = (1/2) * ω1 = (1/2) * (2π/1.70 s) = 2.33 rad/s

Finally, substituting all the values, we get:

p = (0.328 kgm^2 * (2.33 rad/s - 2π/1.70 s)) / (0.19 m * sin(60°)) = 0.319 kgm/s

The speed of the ball bearing before the collision is equal to its linear momentum divided by its mass:

v = p / 0.182 kg = 1.75 m/s

Therefore, the speed of the ball bearing before the collision was 1.75 m/s.

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Answer:If the elevator accelerated downward then the tension force smallest then 500 N. Otherwise, if the elevator accelerated upward then the tension force larger then 500 N.

The tension force = 750 N because the elevator accelerated upward. Force acts upward has plus sign and force acts downward has minus sign.

T – w = m a

750 – 500 = 50 a

250 = 50 a

a = 250 / 50

a = 5.0 m s–2

Explanation:

The position of the image is 35 cm from the concave mirror, the size of the image is approximately 1.944 cm, and the nature of the image is upright.

To determine the position, size, and nature of the image formed by a spherical mirror, we can use the mirror formula:

1/f = 1/v - 1/u

where:

f is the focal length of the mirror,

u is the object distance (distance of the object from the mirror),

v is the image distance (distance of the image from the mirror).

Given data:

f = -12 cm (negative sign indicates a concave mirror)

u = -36 cm (negative sign indicates that the object is located on the same side as the incident light)

h = 2 cm (height of the object)

Substituting the values into the mirror formula, we have:

1/-12 = 1/v - 1/-36

Simplifying the equation:

-1/12 = (36 - v)/36

-1/12 = (36 - v)/36

-1 = 36 - v

v = 36 - 1

v = 35 cm

The positive value for v indicates that the image is formed on the opposite side of the mirror from the object.

To find the size of the image, we can use the magnification formula:

magnification (m) = -v/u

Substituting the values:

m = -35/-36

m ≈ 0.972

Since the magnification is positive, it indicates an upright image.

The size of the image can be determined using the magnification formula:

m = image height (h')/object height (h)

0.972 = h'/2

h' ≈ 1.944 cm

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Considering the definition of speed and velocity, the difference is that speed has no direction while velocity does take direction into account.

Speed ​​is a quantity that expresses the relationship between the space traveled by an object.

In other words, speed can be defined as the amount of space traveled per unit of time with which a body moves .

Velocity is a physical magnitude that relates the displacement of an object, the time it takes to make this change in position and direction.

Because the speed also considers the direction in which the displacement of an object occurs, it is considered a vector magnitude.

The difference between speed and velocity is that speed has no direction, that is, speed is a scalar, while velocity does take direction into account, being a vectorial magnitude.

In, summary, the difference is that speed has no direction while velocity does take direction into account.

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Answer:

1 hydrogen, 1 nitrogen and 3 oxygen atoms.

Explanation:

The resulting acceleration of the slab is 0.98m/s2

Let's first examine whether these blocks move in unison.

We shall do that by determining the whole mass's acceleration.

(40+10) kg first.

Using formula F=ma or a= F/m

= 100N/50kg

The acceleration is 2m/s 2

and the maximum frictional force =μ s ×N

=μs ×m1g

=(0.60)(10)(9.8)=58.8N

Thus, we see frictional force is smaller than the applied force and proves that the block and the slab do not move relative to each other.

For the block we have F=μmg

=0.4×10×9.8=39.2N

The resulting acceleration of the slab, a=F/m=39.2/40=0.98m/s2

Thus, the resulting acceleration of the slab is 0.98m/s2

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​

.

​

Explanation:

Qualitative is to observe and note a quality about something - like the paper airplanes are made out of "white" paper. White is a qualitative property.

Quantitative is to observe and measure a value - like the time of flight of a paper airplane.

By the mechanism described in C) Rod bipolar cells synapse upon AII amacrine cells, which in turn synapse upon cone bipolar cells, rod signals are transmitted in conditions of low light.

In low-light conditions, when the rod photoreceptors are primarily active, the rod signals are transmitted through a specific pathway involving the rod bipolar cells and AII amacrine cells. The rod bipolar cells receive input from the rod photoreceptors and form synapses with AII amacrine cells. The AII amacrine cells then relay the signals to cone bipolar cells, which eventually transmit the information to ganglion cells.

This pathway allows for the amplification and integration of rod signals before they reach the ganglion cells, which are responsible for sending visual information to the brain. This mechanism enables the visual system to function efficiently in low-light conditions and enhances the sensitivity of the rod-mediated vision.

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In conditions of low light, rod signals are transmitted by the mechanism of: Rod bipolar cells synapse upon AII amacrine cells, which in turn synapse upon cone bipolar cells.

What are rod signals? Rod signals refer to the signals that are transmitted by rod photoreceptor cells present in the retina of the eye. These signals are responsible for providing vision in low-light environments. When the amount of light decreases in the environment, rod cells are more sensitive and can detect the presence of even small amounts of light. They can detect the lightness and darkness in the environment and are responsible for providing night vision. The rod cells transmit these signals to the brain where they are interpreted as a visual image.Mechanism for rod signal transmission in low light:Rod bipolar cells synapse upon AII amacrine cells, which in turn synapse upon cone bipolar cells. This mechanism is responsible for transmitting rod signals in conditions of low light. This pathway of signal transmission allows the visual system to extract a larger amount of visual information from the environment even in the absence of bright light.

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Answer:

The tension in the cable is approximately 1440.0 N

Explanation:

The length of the beam = 8 m

The weight of the beam = 200 N

The angle made by the beam support cable = 53°

The weight of the person = 600 N

The position where the person stands = 2 m

The forces acting are the weight of the cable acting at the center of the beam and the weight of the person acting at 2 m from the wall

Therefore, we have;

Sum of moments = 0, which gives;

2000 × 4 + 2 × 600 - 8 × \(T_y\) = 0

2000 × 4 + 2 × 600  = 8 × \(T_y\)

\(T_y\) = 9200/8 = 1150 N

The tension in the cable, T = The component of the force in the cable

The vertical component of the tension  \(T_y\) = T×sin(53)

Therefore;

T =  \(T_y\)/(sin(53)) = 1150/(sin(53 degrees)) = 1439.96 ≈ 1440 N

The tension in the cable, T is approximately 1440 N.

The P value for the given data set is 25127. For finding P value, we have to must find the Z value.

If we've got a normal distribution, then we can convert it to standard normal distribution and its values will give us the z score.

The Z value is calculated as;

\(Z = \dfrac{X - \mu}{\sigma})\)

Z = (X - μ) / σ

Z = (4.007 - 3.6) / 0.607

Z = 0.67051

The P value for the given data set is 25127.

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A person riding a Ferris wheel moves through positions at

(1) the top,

(2) the bottom, and

(3) mid-height. If the wheel rotates at a constant rate, rank these three positions according to

(a)the magnitude of the person’s centripetal acceleration, is same in all cases.

(b) the magnitude of the net centripetal force on the person, is same in all three cases.

(c) the magnitude of the normal force on the person from the bottom,

2<3<1

(d) the weight the person feels, greatest first is at the bottom.

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A standard tire gauge has the lowest reading of 0 psi because it is a device that measures the differential pressure which is the difference between the two pressure.

The total applied force per unit of area is known as the pressure.

The pressure depends both on externally applied force as well the area on which it is applied.

As given in the problem statement a standard tire gauge has the lowest reading of 0 psi because it is a device that measures the differential pressure.

The ambient air represents the most frequent example. But another comparable option is to employ a vacuum. It measures the absolute pressure in the situation. The atmospheric pressure is measured in the absolute pressure term which comes out to be 14.7 psi.

Thus, The lowest reading is 0 psi on a normal tire gauge since it measures differential pressure or the difference between two pressures.

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Answer:

direction should be the answer

Answer: B. I hope you get this right.

Answer:

The ways to change the total energy are to either make the hill taller to increase it or make the hill lower to decrease the total energy.

Explanation:

The total mechanical energy of a system is the sum of the total kinetic energy and total potential energy.

Answer:

The rocket travelled 37km per minute

Explanation:

185÷5=37

Answer:

sorry I don't understand

Explanation:

please translate it in english

Answer:

Im answering for free points sry

Explanation:

...

Answer:

During a solar flare a electrical power will be generated on earth

Answer:

the aurora borealis will be seen in the night sky

Explanation:

I think so..

Answer:

camels have humps to store fat which is then converted to energy when food is scarce ( the humps are not used for storing water )

Answer: camels have humps to store fat which is then converted to energy when food is scarce ( the humps are not used for storing water )