The 300-series Shinkansen trains consist of 16 aluminum cars with a combined mass of 7. 10 X 105 kg. The reduction in mass from the 100-



series enables the 300-series trains to reach top speed of 270 km/h. What is the momentum of one of these trains at its top speed? Is the



momentum of a 300-series train greater or less than the momentum of a 100-series train traveling at its top speed?

Answer:

A.) 39.5 m

B.) 0

C.) 60m/s^2

Explanation:

Given that a displacement function of a particle is x(t)=(20t^2-15t+200).

To Find the total displacement,

Reduce everything by dividing them by 5

X(t) = 4t^2 - 3t + 40 ...... (1)

For instantaneous velocity, differentiate x(t). That is,

dy/dt = 60t - 15 ...... (2)

But dy/dt = velocity.

If dy/dt = 0, then

60t - 15 = 0

60t = 15

t = 15/60

t = 0.25s

Substitutes t in equation (1)

Total displacement will be

X(t) = 4(0.25)^2 - 3(0.25) + 40

X(t) = 0.25 - 0.75 + 40

Total displacement = 39.5 m

To calculate instantaneous velocity, substitute t into equation (2)

V = 60 (0.25) - 15

V = 0.

and to find instantaneous acceleration, differentiate dv/dt

dv/dt = 60

Therefore, acceleration = 60 m/s^2

Answer:

I am pretty sure it is B My friend hope you are well

Explanation:

Answer:

B- It is a constant when the light is traveling in a vacuum.

Explanation:

"Light in a vacuum always travels at the same speed." Those additional three words in a vacuum are very important. A vacuum is a region with no matter in it. So a vacuum would not contain any dust particles (unlike a vacuum cleaner, which is generally full of dust particles)

Answer:

C. Chemical-> mechanical-> thermal

Explanation:

The energy conversion for the propane, that is, energy transformations that occur when propane gas is used to lift the balloon will be:

Chemical energy converting to mechanical energy which later converted to thermal energy

The correct option is therefore Chemical-> mechanical-> thermal which is option C

a) It will take approximately 2.02 seconds for the shell to hit the ground  when fired from a 20 m tall cliff at an initial horizontal velocity of 80 m/s.

b) The vertical velocity of the shell when it hits the ground is approximately 19.8 m/s downward.

c) The horizontal velocity (Vhx) remains constant throughout the motion since there are no horizontal forces acting on the shell.

d) The shell has approximately 40.99 Joules of kinetic energy just before it hits the ground.

a) To determine how long it will take for the shell to hit the ground, we can analyze the vertical motion of the shell. The initial vertical velocity is zero since the shell is fired horizontally. The acceleration acting on the shell is due to gravity and is approximately 9.8 m/s² directed downward. We can use the following kinematic equation:

Δy = Viy * t + (1/2) * a * t²

Since the initial vertical velocity (Viy) is zero, the equation simplifies to:

Δy = (1/2) * a * t²

Where Δy is the height of the cliff, which is 20 m. Rearranging the equation to solve for time (t):

t² = (2 * Δy) / a

Substituting the values:

t² = (2 * 20 m) / 9.8 m/s²

t² ≈ 4.08 s²

Taking the square root of both sides:

t ≈ \(\sqrt{4.08 }\)s ≈ 2.02 s

b) At the instant the shell hits the ground, its vertical velocity will be the final vertical velocity (Vfy). We can use the equation:

Vfy = Viy + a * t

Since the initial vertical velocity (Viy) is zero, the equation simplifies to:

Vfy = a * t

Substituting the values:

Vfy = 9.8 m/s² * 2.02 s

Vfy ≈ 19.8 m/s

c) The horizontal velocity (Vhx) remains constant throughout the motion since there are no horizontal forces acting on the shell. Therefore, the horizontal velocity of the shell as it reaches the ground is the same as the initial horizontal velocity, which is 80 m/s.

d) To determine the kinetic energy of the shell just before it hits the ground, we can use the formula:

Kinetic energy (KE) = (1/2) * m * V²

Where m is the mass of the shell, given as 1.2 kg, and V is the velocity of the shell just before it hits the ground. The magnitude of the velocity can be calculated using the Pythagorean theorem:

V = √(Vhx² + Vfy²)

Substituting the values:

V = \(\sqrt{(80 m/s)^2 + (19.8 m/s)^2}\)

V ≈ \(\sqrt{(6400m^2/s^2 + 392.04 m^2/s^2)}\)

V ≈ (\(\sqrt{6792.04 m^2/s^2)}\)

V ≈ 82.4 m/s

Now, substituting the values into the kinetic energy equation:

KE = (1/2) * 1.2 kg * (82.4 m/s)²

KE ≈ 40.99 J

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Answer:

Car A has twice the energy of car B.

Explanation:

The kinetic energy of an object is given by :

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

Where

m is the mass

v is the speed of the object

Car A has twice the mass of Car B. Both travel at the same speed i.e.

\(m_A=2m_B\)

So,

\(\dfrac{K_A}{K_B}=\dfrac{(1/2)m_Av^2}{(1/2)m_Bv^2}\\\\=\dfrac{2m_B}{m_B}\\\\\dfrac{K_A}{K_B}=2\\\\K_A=2\times K_B\)

So, the kinetic energy of car A is twice of the kinetic energy of car B.

Answer:

Car A has twice the energy

Explanation:

Answer:

Mass and volume

Explanation:

Density is determined by two types of measurements mass and volume. The resulting density value is typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per liter (kg/L).

Density is determined by two types of measurements:

Mass: Mass is the amount of matter present in an object. It is typically measured in units such as grams (g) or kilograms (kg).

Volume: Volume is the amount of space occupied by an object. It can be measured in units such as cubic centimeters (cm³) or liters (L).

To calculate density, you divide the mass of an object by its volume. The formula for density is:

Density (ρ) = Mass (m) / Volume (V)

The resulting density value is typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per liter (kg/L).

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When the cat nears the right end, the plank just begins to tip. If the cat has a mass of 4.7 kg, Cat is close to the right end of the two-by-four can it walk before the board begins to tip is: 1.52m

The cat can walk up to 1.52 m from the right end of the two-by-four before it begins to tip. This is because the plank has a mass of 7.00 kg and the cat has a mass of 4.7 kg. The total mass is 11.7 kg, which is slightly larger than the 1.44 kg needed to tip the plank (7.00 kg multiplied by 0.44 m).

In other words, the cat's mass is greater than the additional weight needed to tip the plank. To determine how close the cat can walk to the right end before it tips, you must first determine the total weight of the plank and the cat. The total weight is the mass of the plank, 7.00 kg, plus the mass of the cat, 4.7 kg. This gives a total mass of 11.7 kg.

The distance from the left end to the center of the plank is 0.44 m. So, the additional weight needed to tip the plank is 7.00 kg multiplied by 0.44 m, which equals 1.44 kg. Since the total weight of 11.7 kg is slightly larger than 1.44 kg, the plank will just begin to tip when the cat is 1.52 m from the right end.

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The acceleration of the mass center is \(a = 7.857 rad / s^2\)

and the angular acceleration of the beam at this instant, \(a_{G} = 34.1 ft/ s^2\)

The mass moment of inertia of the beam :

Thus Ig  = 1/2 ml^2

this implies Ig = 1/2 ( 150/ 32.2 ) (12^2)

Thus the required value of Ig = 55.90 slug ft^2

Sigma f of x = m(a g)x

which is equal to Sigma f of x  = 21.47 ft/s^2 --------- 1

because 200 cos 60 = 150/ 32.2 (ag)x

and Sigma f of y = m a (g)y = 26.45 ft^2 --------2

because 200 sin 60 = 55.90α + 100(6)

The acceleration of the mass centre is a = 7.857 rad / s^2

Thus the magnitude of the acceleration is

aG = \(\sqrt{21.47^2+ 26.45^2}\)

aG = 34.1 ft/ s^2

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Answer: The correct option would be (Put it in the refrigerator)

Explanation: Have a good day :)

Answer:

C

Explanation:

Decreasing its temp decreases particle movement

The correct statement will be "At a depth of 30 m/99 ft, gas molecules in a flexible container will be packed four times more closely together than they will be at the surface."

Generally, a gas molecule is simply defined as a combination of numbers of atoms that are connected one to another.

In conclusion, The deeper gas molecules go in a surface the more compact they become

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Answer:

20 ohms

Explanation:

Resistance=Potential difference÷Electric current

X=260÷13

X=20

Opportunities for collaboration, enhancing the learning experience, own pace, within a defined timeline, and accommodating different learning styles and schedules. is the benefit of an open course in terms of completing a course sequentially

An open course typically offers learners an orderly way to complete a course sequentially by breaking down the course material into smaller modules or units.

An open course allows learners to access course materials and complete assignments in a structured, step-by-step manner.

An open course provides a clear path for learners to follow, making it easier to stay organized and on track.

An open course often includes interactive features and opportunities for collaboration, enhancing the learning experience.

An open course typically allows learners to work at their own pace, within a defined timeline, accommodating different learning styles and schedules.

An open course can be accessed from anywhere with an internet connection, allowing for greater flexibility and accessibility.
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Question

What is the benefit of an open course in terms of completing a course sequentially?

Answer:

Explanation:

24 i think

Answer:

B. 24

Explanation:

There are 24 atoms in one molecule of C6 H12 06. This chemical compound is made up of 6 atoms of carbon, 12 atoms of hydrogen, and 6 atoms of oxygen. We find the number of atoms by adding these numbers up. We than get:

6 + 12 + 6 = 12 + 12 = 24

Therefore, there are 24 atoms in the following chemical formula.

The secondary coil should have approximately 11.19 windings to provide the 6.7367 V required by the electric train when connected to a 108.246 V household circuit.

To determine the number of windings in the secondary coil of the transformer, we can use the formula for transformer voltage:

\(V_{secondary}/V_{primary}=N_{secondary}/N_{primary}\)

where V_secondary is the voltage across the secondary coil, V_primary is the voltage across the primary coil, N_secondary is the number of windings in the secondary coil, and N_primary is the number of windings in the primary coil.

We are given that the primary coil has 180.294 windings and is connected to a 108.246 V household circuit. We also know that the electric train requires 6.7367 V to operate. Therefore, we can set up the equation:

\(\frac{V_{secondary}}{108.246\text{ V}} = \frac{N_{secondary}}{180.294}\)

Solving for N_secondary, we get:

\(N_{secondary} = \frac{V_{secondary}}{108.246\text{ V}} \times 180.294\)

We can substitute the voltage required by the train, V_secondary = 6.7367 V, into this equation and solve for N_secondary:

\(N_{secondary} = \frac{6.7367\text{ V}}{108.246\text{ V}} \times 180.294\)

N_secondary ≈ 11.19

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Answer:

the electric and magnetic fields that make up an electromagnetic wave are perpendicular (at right angles) to each other. Both fields are also perpendicular to the direction that the wave travels. Therefore, an electromagnetic wave is a transverse wave.

Explanation:

The charge will move to the left.

The electric potential varies linearly with x, so we can find the equation for the potential as:

V(x) = mx + b,

where m is the slope and b is the y-intercept. We can use the given points to solve for m and b:

300 V = m(0 cm) + b

-100 V = m(5 cm) + b

Subtracting the first equation from the second, we get:

-400 V = 5m

m = -80 V/cm

Substituting this value for m into one of the equations, we get:

300 V = -80 V/cm * (0 cm) + b

b = 300 V

So the equation for the potential is:

V(x) = -80 V/cm * x + 300 V

Now we can use the electric field to determine the direction of the force on the positive charge. The electric field is the negative gradient of the potential:

E(x) = -dV/dx = 80 V/cm

At x = 2.5 cm, the electric field is:

E(2.5 cm) = 80 V/cm

Since the charge is positive, it will experience a force in the direction of the electric field, which is to the left. Therefore, the charge will move to the left.

The answer is (b) Move to the left.

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Then the rate of change in the sphere's surface area is Square inches per minute: 1138.

Let V be the volume of the sphere, and A be its surface area.

We know that V = (4/3)πr³ and A = 4πr², where r is the radius of the sphere.

Differentiating V with respect to time, we get:

dV/dt = 4πr² dr/dt

Substituting the given value of dV/dt = 569, we get:

4πr² dr/dt = 569

dr/dt = 569/(4πr²)

Differentiating A with respect to time, we get:

dA/dt = 8πr dr/dt

Substituting the value of dr/dt from the above equation, we get:

dA/dt = 8πr (569/(4πr²))

dA/dt = 1138π square inches per minute

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Answer:

Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water.

Explanation:

Destructive waves erode through four main processes; Hydraulic Action, Compression, Abrasion and Attrition.

Answer:

Below! ;)

Explanation:

Lots of people have the idea that erosion is where something is eroded away, and EVEN I thought that once, but erosion is the process in which parts of land are moved to a different province. Erosion can sometimes also bring in invacious species.

Hope this helps!

Have a nice day!

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The layers of the atmosphere are located from the Earth's surface to outer space in the following order: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

The Earth's atmosphere is divided into five layers based on their altitude, temperature, and composition. The troposphere, closest to the Earth's surface, is where most weather occurs, and where temperature decreases with altitude. The stratosphere, which contains the ozone layer, is where temperature increases with altitude due to the absorption of UV radiation by ozone.

The mesosphere is the layer where meteors burn up, and temperature decreases with altitude. The thermosphere is where the auroras occur and temperature increases with altitude due to absorption of solar radiation. Finally, the exosphere blends into outer space and is the layer where satellites orbit.

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Answer:

C

Explanation:

the magnetic field remain the same because the number of turn per unit length is unchanged

The ball will hit the ground after approximately 1.88 seconds and at a horizontal distance of approximately 34.15 ft away.

a. To find the position vector of the particle at time t, we can use the kinematic equation for motion with constant acceleration. The position vector ⃗r(t) is given by ⃗r(t) = ⃗r₀ + ⃗v₀t + 0.5⃗at², where ⃗r₀ is the initial position vector, ⃗v₀ is the initial velocity vector, ⃗a is the acceleration vector, and t is the time.

Plugging in the values, we have ⃗r(t) = (5, 0, 4) + (0, 0, 7)t + 0.5(-11, -1, -5)t², which simplifies to ⃗r(t) = (5 - 11t^2, -t, 4 - 5t^2). This gives the position vector of the particle at any given time t.

b. For the baseball, we can analyze its motion using projectile motion equations. The vertical and horizontal motions are independent of each other, except for the initial velocity. The vertical motion is affected by gravity, with an acceleration of -32 ft/s².

Using the given initial speed of 26 ft/s and the launch angle of 20 degrees, we can decompose the initial velocity into its vertical and horizontal components. The vertical component is 26 * sin(20°) ft/s, and the horizontal component is 26 * cos(20°) ft/s.

To find the time of flight, we can use the equation for vertical motion: y = y₀ + v₀yt + 0.5at². The initial vertical position is 40 ft, the initial vertical velocity is 26 * sin(20°) ft/s, and the vertical acceleration is -32 ft/s². Solving for t, we get t ≈ 1.88 seconds.

To find the horizontal distance, we use the equation x = x₀ + v₀xt, where the initial horizontal position x₀ is 0 ft (assuming the ball is thrown from the stands), the initial horizontal velocity v₀x is 26 * cos(20°) ft/s, and the time of flight t is approximately 1.88 seconds. Solving for x, we find x ≈ 34.15 ft.

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Answer:

Asteroids and comets have a few things in common. They are both celestial bodies orbiting our Sun, and they both can have unusual orbits, sometimes straying close to Earth or the other planets. They are both “leftovers” — made from materials from the formation of our Solar System 4.5 billion years ago. But there are a few notable differences between these two objects, as well. The biggest difference between comets and asteroids, however, is what they are made of.

While asteroids consist of metals and rocky material, comets are made up of ice, dust, rocky materials and organic compounds. When comets get closer to the Sun, they lose material with each orbit because some of their ice melts and vaporizes. Asteroids typically remain solid, even when near the Sun.

Right now, the majority of asteroids reside in the asteroid belt, a region between the orbits of Mars and Jupiter which may hold millions of space rocks of varying sizes. On the other hand, the majority of comets are in the farthest reaches of our Solar System: either 1. in the Kuiper Belt — a region just outside the orbit of the dwarf planet Pluto that may have millions of icy comets (as well as many icy dwarf planets like Pluto and Eris); or 2. the Oort Cloud, a region where trillions of comets may circle the Sun at huge distances of up to 20 trillion kilometers (13 trillion miles).

Answer:

they are both leftovers materials

Explanation:

think about how the solar system is made the comets and asteroids are both rocks and remains of the solar system

Answer:

I drive my car at a speed of 30m/s is speed

I drive my car at a speed of 30m/s northward is velocity

Answer:

the magnetic dipole moment caused by orbiting electrons

Explanation:

Answer:

The answers to this question is:

1. inner ear

2. outer ear

3. middle ear

Explanation:

Hope that helps!

Answer:

inner, outer, middle

Explanation:

Answer:True

Explanation:

The correct answer is c. alpha particles. Radon is a radioactive gas that can be found in homes and buildings. It is detected through the measurement of alpha particles, which are emitted by the decay of radon atoms.

This measurement is usually done using a device called a radon detector, which can provide an accurate reading of the radon levels in a home. It is important to regularly test for radon in order to ensure that the levels are safe for occupants.

Radon is detected in a home through the measurement of alpha particles.

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the third one is the brightest, the second one is the second brightest, the first one is the second dimmest, and last but not least, the last one is the dimmest.

Explanation:

hope this helps

Answer:

A is the answer!

Explanation:

Edge 2021

Answer:

A

Explanation:

Edge

When is the average velocity of an object equal to the instantaneous velocity is C. This is the case only when the velocity is constant.

The instantaneous velocity of an object is equal to the average velocity of an object when the velocity is constant or when the acceleration is zero, this is the case only when the velocity is constant. When an object has a constant velocity, the instantaneous velocity of the object is equivalent to the average velocity of the object. This is true because the velocity of the object remains constant over time.

For example, if an object travels at a speed of 20 meters per second for a time period of 5 seconds, then the instantaneous velocity at the end of the 5 seconds is 20 meters per second, and the average velocity of the object over the 5 seconds is also 20 meters per second. This is because the velocity remained constant throughout the entire time period. Therefore, option c is correct, this is the case only when the velocity is constant.

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