a brass rod is encased in aluminum. what happens to the speed of a sound wave when it moves from the aluminum into the brass?

A. it stays the same.

B. it decreases.

C. it falls to zero.

D. it increases

Answer:

sq root 2 sec.... same as initial speed

Answer:

2kg

Explanation:

100N= force 50m/s²=acceleration

mass=?

the equation is;

Mass(kg)= Force(N) ÷ Acelleration(m/s²)

100÷50=2

Let's look at relationship

\(\\ \rm\rightarrowtail T=2\pi\sqrt{\dfrac{m}{k}}\)

\(\\ \rm\rightarrowtail T\propto \sqrt{m}\)

Hence

\(\\ \rm\rightarrowtail \dfrac{T_1}{T_2}=\sqrt{\dfrac{m1}{m2}}\)

\(\\ \rm\rightarrowtail \dfrac{1.5}{2}=\sqrt{\dfrac{0.5}{m2}}\)

\(\\ \rm\rightarrowtail 0.75^2=\dfrac{0.5}{m2}\)

\(\\ \rm\rightarrowtail m_2=\dfrac{0.5}{0.75^2}\)

\(\\ \rm\rightarrowtail m_2=0.889\)

Hence

Answer

Mass needs to added =0.889-0.500=0.389kg

Explanation:

The corona is the Sun's topmost layer, extending millions of kilometers into space. Option A is correct.

The Sun's atmosphere consists of several layers, each with its own distinct properties and characteristics. The corona is the outermost layer of the Sun's atmosphere, extending millions of kilometers into space. It is composed of extremely hot and ionized gas, with temperatures reaching several million degrees Celsius.

The corona is visible during a total solar eclipse as a white halo around the Sun. The corona is an important area of study for astronomers and astrophysicists, as it plays a key role in the Sun's magnetic field and in the solar wind, a stream of charged particles that flows out from the Sun and affects the space weather around Earth. Option A is correct.

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Answer:

bones

Explanation:

Bones are is preserved in cast and mold fossils.

Normally the other 'parts of the body' like muscles, ligaments, blood and organs are soft.

Answer:

bones

Explanation:

After a 5.6 kg bowling ball with a velocity of 22 mph collides with a 1.6 kg bowling pin, the ball's speed reduces to 16 mph. The velocity of the bowling pin after it is hit is 33.6 mph in the opposite direction

To solve this problem, we can use the principle of conservation of momentum. According to this principle, the total momentum before the collision should be equal to the total momentum after the collision.

First, let's calculate the initial momentum of the system before the collision. The momentum of an object is calculated by multiplying its mass by its velocity. For the bowling ball, the initial momentum is 5.6 kg (mass of the ball) multiplied by 22 mph (velocity of the ball), which gives us 123.2 kg·mph.

Now, let's calculate the final momentum of the system after the collision. The final momentum of the system will be the sum of the momentum of the bowling ball and the momentum of the bowling pin. We are given that the bowling ball's speed after impact is 16 mph. So, the final momentum of the ball is 5.6 kg (mass of the ball) multiplied by 16 mph (velocity of the ball), which equals 89.6 kg·mph.

To find the velocity of the bowling pin after the collision, we need to subtract the final momentum of the ball from the total final momentum of the system. The final momentum of the bowling pin can be calculated by subtracting the final momentum of the ball from the total final momentum.

So, the momentum of the bowling pin is 89.6 kg·mph (total final momentum) minus 123.2 kg·mph (final momentum of the ball), which gives us -33.6 kg·mph. Since momentum is a vector quantity, the negative sign indicates that the direction of the bowling pin's velocity is opposite to that of the bowling ball's velocity. Therefore, the velocity of the bowling pin after it is hit is 33.6 mph in the opposite direction.

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Answer:

When the bulb receives this electrical energy, then it converts it into light and heat energy. At first, the energy transformation takes place in the battery and then the bulb. Hence, the transformation of energy in the given situation can be shown as: Chemical Energy → Electrical Energy → Light Energy + Heat Energy.

Answer:

4.695 m/s

Explanation:

We can use the law of conservation of momentum to solve this problem. The law of conservation of momentum states that the total momentum of a closed system remains constant if there are no external forces acting on it. In this case, the two balls form a closed system.

The total momentum before the collision is:

p_before = m1v1 + m2v2

where m1 and v1 are the mass and velocity of the first ball, and m2 and v2 are the mass and velocity of the second ball.

Plugging in the values given in the problem, we get:

p_before = (0.32 kg) * (5.1 m/s) + (0.75 kg) * (0 m/s) = 1.632 kg*m/s

The total momentum after the collision is:

p_after = m1v1' + m2v2'

where v1' and v2' are the velocities of the first and second ball after the collision.

We know the velocity of the second ball after the collision:

v2' = 2.38 m/s

To find the velocity of the first ball after the collision, we can use the conservation of momentum:

p_before = p_after

m1v1 + m2v2 = m1v1' + m2v2'

Plugging in the values we know and solving for v1', we get:

v1' = (m1v1 + m2v2 - m2*v2') / m1

v1' = (0.32 kg) * (5.1 m/s) + (0.75 kg) * (0 m/s) - (0.75 kg) * (2.38 m/s) / (0.32 kg)

v1' = 6.48 m/s - 1.785 m/s

v1' = 4.695 m/s

Therefore, the velocity of the 0.32 kg ball after the collision is 4.695 m/s

The final velocity of the first ball is approximately 3.14 m/s. We can solve this physics problem using the principle of conservation of momentum. The total momentum before the collision is equal to the total momentum after the collision, which allows us to solve for the unknown final velocity of the first ball.

Explanation:

To solve this problem, we can use the principle of conservation of momentum.The preliminary momentum of the machine is identical to the very last momentum.Since the second one ball is first of all at rest, its preliminary momentum is zero. The initial momentum of the first ball is given by the product of its mass and velocity: 0.32 kg × 5.1 m/s.

Using the principle of conservation of momentum, we can set up the equation: (0.32 kg × 5.1 m/s) = (0.32 kg × v1) + (0.75 kg × 2.38 m/s), where v1 represents the final velocity of the first ball.

By solving this equation, we can find that the final velocity of the first ball is approximately 3.14 m/s.

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Answer:

Velocity includes direction.

Explanation:

Velocity is a vector, so it has direction and magnitude.

Answer:

parallel combination of cell

Answer:

from top (youngest) to bottom (oldest) -

Conglomerate

Brecca

Shale

Dolostone

Explanation:

got it wrong from the person above and then it said this the right answer lol.

The oldest rock layer among the given options is shale then it is dolostone and then conglomerate and the youngest rock layer is Breccia.

Sedimentary rocks are formed from the sediments by river and ocean. These are developed over time by the action of wind and water. Sedimentary rocks are deposition or accumulation or minerals on the earth surface.

There are different types of rock layers based on the minerals present, age and formation.Shale rock is a clastic sedimentary rock formed flakes of clay minerals.

Conglomerate rocks is another clastic rock containing round clasts of more than two millimeters in diameter. Dolostone or dolomite is limestone and breccia is a mineral cement with fine sharp angled fragments.

The oldest among this is shale and the order for others from oldest to youngest is dolostone, conglomerate and breccia.

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Answer:

A. Generator

Explanation:

Hope this will help

Answer:

A. Generator

Explanation:

That is the correct answer

The movement occurs as . Each orbit has a different energy, and electrons can move to other orbits by emitting or absorbing energy, which is also quantized.

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Global warming is mainly caused by the greenhouse gases. If industries take actions to reduce the evolution of these gases, global warming can be decreased a lot. To reduce these gases they have to plan for proper waste management and gas testing steps.

Global warming is the geographical process of warming up of the earth's surface and as a result ecosystems will be disordered and snow hills are starting to met leading to rise in sea level.

The main cause of global warming is the greenhouse gas effect. Greenhouse gases are methane, carbon dioxide, oxides of nitrogen and sulfur. They will intensely absorb heat from the atmosphere and warm up the surface of earth.

Evolution of carbon dioxide from factories should minimized by proper strategies. Similarly catalytic reactions and alternative chemicals for carbon dioxide and oxides of sulfur and nitrogen can be used to minimize global warming.

Burning of plastics and fossil fuels have to be reduced and proper waste management have to be planned by the industries.

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Both of the below elements, covering a short period of time and having a limited number of characters, are typically associated with climactic plot structure. The correct options are:

c. Covers a short period of time

d. A limited number of characters

This structure focuses on a specific event or conflict that unfolds rapidly and intensifies towards a climax, usually involving a small set of characters. The plot begins closer to the climax, omitting extensive exposition or background information, and often takes place in a restricted locale to maintain a sense of urgency and intensity.

Climactic plot structure refers to a narrative structure that focuses on a condensed timeframe and a limited number of characters. This type of plot structure often unfolds rapidly, with events building up to a climactic moment or turning point. By covering a short period of time and involving a small cast of characters, the climactic plot structure creates a sense of intensity and immediacy in the story, allowing for focused and impactful storytelling. This structure is commonly used in works such as short stories, plays, and films where brevity and concentrated impact are desired.

Therefore, options c and d are correct.

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The rotational inertia of the wheel is 1.344 × 10⁻⁴ kgm²

Rotational inertia of an object is the measure of the ability for the object to rotate about an axis which may or may not pass thorugh the object.

Since in one type of wagon wheel consists of a 2.0-kg hoop fitted with four 0.80-kg thin rods placed along diameters of the hoop so as to make eight evenly spaced spokes and for a hoop of radius 0.40 mm, we need to find the rotational inertia of the wheel about an axis perpendicular to the plane of the wheel and through the center?

The rotational inertia of the wheel is given by I = I₁ + I₂ where I₁ = rotational inertia of hoop = and I₂ = rotational inertia of thin rods

Now the rotational inertia of the hoop is, I₁ = m₁r² where

Also, the rotational inertia of each thin rod is I₃ = m₂L²/2 where

Since there are four thin rods, I₂ = 4I₃

= 4m₂L²/2

= 2m₂L²

= 2m₂(2r)²

= 2m₂(4)r²

= 8m₂r²

So, I = I₁ + I₂

I = m₁r² + 8m₂r²

I = (m₁ + 8m₂)r²

So, substituting the values of the variables into the equation, we have

I = (m₁ + 8m₂)r²

I = (2.0 kg + 8 × 0.80 kg)(0.004 m)²

I = (2.0 kg + 6.4 kg)(0.000004 m²)

I = (8.4 kg)(0.000016 m²)

I = 0.0001344 kgm²

I = 1.344 × 10⁻⁴ kgm²

The rotational inertia of the wheel is 1.344 × 10⁻⁴ kgm²

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Answer:

75 J

Explanation:

After collapsing from the shelf. The ball falls one fourth of the distance down. If we calculate 100 - 1/4 ×100= 75 J.

Answer:

what is the minimum power that the engine of a 560kg has to deliver to accelerate the car from the rest to 100 kilometers/he in 6.0 seconds per feet

Explanation:

The drag force depends on the size and shape of the truck, as well as its velocity and the properties of the air (density, viscosity, etc.). Without this information, I cannot provide a meaningful estimate.

To estimate the drag force on a truck with an air temperature of 59°F and standard pressure, you'll need more information, such as the truck's velocity, frontal area, and drag coefficient. The drag force (F_d) can be calculated using the following formula:

F_d = 0.5 * ρ * v^2 * C_d * A

Where:
- F_d is the drag force
- ρ is the air density (affected by temperature and pressure)
- v is the velocity of the truck
- C_d is the drag coefficient
- A is the

of the truck

Please provide the additional information to accurately estimate the drag force on the truck.

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For this problem, lets use the kinetic energy formula

Where m is equal to mass and v is equal to velocity

In our given, we have:

velocity = 60 m/s

kinetic energy = 6,025,000 J

Plug these numbers into the formula to get the mass

m = 3347.222 kg

For an electric circuit to flow you must have a closed circuit

An electrical circuit that has a complete path for electrons to travel through it is said to be closed. Electrons move through a conductive material, like a wire, in a closed circuit from a power source's negative terminal to the positive terminal and back again. Electric current, which is made up of this electron movement, can be used to carry out tasks like powering an incandescent lightbulb.

The electrons have a continuous path from the negative terminal to the positive terminal and back in a complete circuit. The conductive substance, the power supply, and any additional circuit elements like resistors, switches, or lightbulbs are all included in this path.

As long as the circuit is closed, which means there are no interruptions in the path obstructing the passage of electrons, the flow of electrons will continue.

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Answer:

6.25 meter per second

Explanation:

because 8\50=6.25

Answer:

6.25 Meters per second

13.98085 Miles per hour

Explanation:

The loudness of sound is inversely proportional to the square of the distance of the listener from the source. (B)

Answer:

B. It is inversely proportional to the square of the distance of the listener from the source.

Explanation:

The best way to describe sound levels is through a ratio scale.

The decibel scale, which measures sound levels, is best described as a ratio scale. While the decibel scale is logarithmic, it can be transformed into a linear ratio scale by using a reference point. By selecting a reference point as the softest sound the human ear can hear unaided (0 dB), we establish a meaningful zero point on the scale. Any sound level above this reference point can be expressed as a positive value, indicating its magnitude relative to the softest audible sound. The logarithmic nature of the decibel scale still holds, with each increase of 10 dB representing a tenfold increase in sound intensity. However, by anchoring the scale to a fixed reference point, we can now quantify and compare sound levels in a meaningful way, making it a ratio scale.

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Explanation:

advantage: Easy to design and build the circuit

disadvantage: if one component in a series circuit fails, then all the components in the circuit fail because the circuit has been broken.

hope it helps!

The net electric field produced at the center of the square formed by four particles with given charges can be represented in unit-vector notation as \(E = (E_x)i + (E_y)j\), where \(E_x\) and \(E_y\) are the components of the net electric field in the x and y directions, respectively.

To determine the net electric field at the center of the square, we need to calculate the electric field contributions from each individual particle and then sum them up. The electric field due to a point charge at a distance r from it is given by the equation\(E = k*q/r^2\), where k is Coulomb's constant and q is the charge.

The electric field contributions from particles \(q_1\) and \(q_3\), which have positive charges, will have the same direction and can be added together. Similarly, the electric field contributions from particles \(q_2\) and \(q_4\), which have negative charges, will also have the same direction and can be added together. The x and y components of the net electric field can then be determined by summing the individual contributions.

Since the square is symmetric, the electric field contributions from opposite charges will cancel out along the diagonal directions. Therefore, the net electric field at the center of the square will only have x and y components. By calculating the contributions and summing them up, we can express the net electric field as \(E = (E_x)i + (E_y)j\), where \(E_x\) and  \(E_y\) are the components of the net electric field in the x and y directions, respectively.

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