11. Amy is in a car that is moving at a speed of 50 kilometers/hour. If she moves a total distance of
230 kilometers, how long was she in the car?

Answer:

what?

Explanation:

theres nothing

Answer:

The magnitude of acceleration of the student is 0.6 m/s²

Explanation:

Given that,

Initial velocity = 2.8 m/s

Final velocity = 4.7 m/s

Time = 3.4 sec

We need to calculate the magnitude of acceleration of the student

Using formula of acceleration

\(a=\dfrac{v_{f}-v_{i}}{t}\)

Where, \(v_{f}\) = final velocity

\(v_{f}\) = final velocity

t = time

Put the value into the formula

\(a=\dfrac{4.7-2.8}{3.4}\)

\(a=0.6\ m/s^2\)

Hence, The magnitude of acceleration of the student is 0.6 m/s²

Explanation:

To find the horizontal (eastward) component of the plane's velocity, we need to determine the component of the velocity in the eastward direction.

Given:

Velocity magnitude: 185 km/hr

Angle north of east: 36 degrees

To calculate the eastward component, we can use trigonometric functions. The eastward component can be found by multiplying the velocity magnitude by the cosine of the angle.

Eastward component = Velocity magnitude * cos(angle)

Eastward component = 185 km/hr * cos(36 degrees)

Using a calculator or trigonometric table, we find that cos(36 degrees) is approximately 0.809.

Eastward component ≈ 185 km/hr * 0.809

Eastward component ≈ 149.965 km/hr

Therefore, the horizontal (eastward) component of the plane's velocity is approximately 149.965 km/hr.

Answer:

An acid is a compound that increases hydrogen ions (H+) when it is dissolved in a solution.

all I got

The force of friction on the box, when it starts sliding on the wooden incline, is approximately 13.06 N, acting up the incline.

To calculate the force of friction on the box, we need to consider the forces acting on it. Let's analyze the situation step by step:

Resolve the weight of the box into components:

The weight of the box can be broken down into two components: one parallel to the incline (down the incline) and one perpendicular to the incline. Since the positive direction is defined as down the incline, the parallel component is positive, and the perpendicular component is negative.

Weight parallel to the incline (\(W_1\)) = m * g * sin(θ)

Weight perpendicular to the incline (\(W_2\)) = m * g * cos(θ)

where:

m = mass of the box = 4.96 kg

g = acceleration due to gravity = \(9.8 m/s\²\)

θ = angle of the incline = \(31.3\°\)

Substituting the values into the formulas:

\(W_1 = 4.96 kg * 9.8 m/s\² * sin(31.3\°) = 24.48 N\)

\(W_2 = 4.96 kg * 9.8 m/s\² * cos(31.3\°) = -42.13 N\) (negative because it acts in the opposite direction)

Determine the maximum static friction force (\(f_{smax}\)):

The maximum static friction force can be calculated using the coefficient of static friction \((u_{stat})\) and the perpendicular component of weight.

\(f_{smax}\) = \((u_{stat})\) * |\(W_2\)|

Substituting the values:

\(f_{smax}\) = 0.48 * |-42.13 N| = 20.24 N

Check if the force of gravity down the incline (\(W_1\)) is less than the maximum static friction force (\(f_{smax}\)):

If W₁ is less than or equal to \(f_{smax}\), the box will remain at rest because static friction can balance the gravitational force. However, if \(W_1\) is greater than \(f_{smax}\), the box will start sliding, and we'll need to calculate the kinetic friction force.

W₁ ≰ \(f_{smax}\) (in this case, \(W_1\) is greater than \(f_{smax}\))

Calculate the force of kinetic friction (\(f_k\)):

When the box starts sliding, we need to consider the coefficient of kinetic friction (\(u_{ken\)) to calculate the force of kinetic friction.

\(f_k = u_{ken} * |W_2|\)

Substituting the values:

\(f_k\) = 0.31 * |-42.13 N| = 13.06 N

Therefore, the force of friction on the box is approximately 13.06 N (acting up the incline) when it starts sliding.

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Answer:

The extension is directly proportional to the force applied.

ex: if the force is doubled, the extension doubles. This works until the limit of proportionality is exceeded.

Hope this helped~

Explanation:

Answer:

the extension will also double, unless the spring has reached its limit of proportionality because of Hooke's law: The extension of a spring is directly proportional to the force applied, provided that the limit of proportionality is not exceeded.

Answer:

  85.2 N

Explanation:

You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.

Your weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...

  W = k(M/r²) = 710 N

  W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N

Your weight would be 82.5 N.

Answer: 15m..............

The phenomenon that occurs when the time on the clock of an astronaut on a spaceship passing at 0.25c runs slower than does time on a patent clerk's clock is called time dilation.

Time dilation:Time dilation is a phenomenon in which time passes at a slower rate for an observer in relative motion compared to a stationary observer, as predicted by the theory of relativity.

It also is a consequence of the theory of relativity, which predicts that time appears to run slower for objects that are moving relative to an observer.

In this case, the astronaut's clock appears to be running slower than the patent clerk's clock because the astronaut is moving relative to the patent clerk.

This effect becomes more pronounced as the speed of the spaceship approaches the speed of light.

At speeds close to the speed of light, time dilation becomes significant and can have practical implications, such as the need for correction factors in GPS systems that account for the time dilation effects of satellites in orbit.

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Answer:

Explanation:

Answer:

The temperature at the top is -39.5 degree

Explanation:

The height of Mt Everest = 8850 m

The base is at the elevation of = 5400 m

The drop in temperature = 1 degree per 100 m

At the base, the temperature = -5

Since every 100 meter rise in height results in the one degree drop of temperature. Therefore, first find the difference between the base and height. Multiply with negative one.

Difference in heights = 8850 – 5400 = 3450

The temperature at the top = (3450 / 100) + 5 = -39.5 degree

Since there is fall in temperature so we use negative sign.

ANSWER:

$ 12177

STEP-BY-STEP EXPLANATION:

We must calculate the area of the playground, knowing that the area is equal to length times width, like this:

Now, knowing the area, we can calculate the total cost, like this:

The resurfacing cost is $ 12177

The force experienced by the loop can be utilized to measure the field strength of the uniform magnetic field.

This force is known as the magnetic force or the Lorentz force.

The magnetic force (F) on a current-carrying loop of wire in a magnetic field is given by the equation:

\(F = I * B * A * sin(\theta)\)

Where:

F is the magnetic force,

I is the current flowing through the loop,

B is the magnetic field strength,

A is the area of the loop, and

θ is the angle between the magnetic field and the normal to the loop.

In this case, the loop is placed perpendicular to the magnetic field, so θ = 90 degrees, and sin(θ) = 1. Therefore, the equation simplifies to:

F = I * B * A

By adjusting the current and measuring the resulting force, we can calculate the magnetic field strength (B) using the equation:

B = F / (I * A)

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--The complete question is, How the force on a loop of wire in a magnetic field can be used to measure the field strength? the field is uniform, and the plane of the loop is perpendicular to the field.--

The kinetic energy of another body having three times the mass of the given object will be 108 J

Kinetic energy-In physics, the kinetic energy of an object is the energy  it has due to  motion. It is defined as the work required to accelerate a body from a given mass from rest to a specified speed.

The kinetic energy of a body is given by \(K.E= \frac{1}{2}Mv^{2}\) (first equation)

Given K.E= 36J

Now the mass of second body is m=3M

also the second body is moving with the same speed v

So kinetic energy of second body K.E₂= \(\frac{1}{2}mv^{2} =\frac{1}{2}(3M)v^{2}\)=36×3

=108J (from first equation)

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Answer:

whats your way  (look at Explanation)

Explanation:

The best method for producing a plant similar to the one you already have will depend on the specific plant and the desired outcome. Here are some common methods of plant propagation:

Seeds: This is the most traditional and natural method of propagating plants. The seeds can be collected from the parent plant, or purchased from a reputable source, and then planted in soil or another growing medium.

Cuttings: Cuttings are pieces of stem or leaf taken from the parent plant and used to grow a new plant. This method is often used for plants that are difficult to propagate from seeds, or for plants that have special qualities (such as a particular color or texture) that the grower wants to preserve.

Layering: This is a method in which a stem is bent to the ground and rooted in soil, while still attached to the parent plant. The rooted stem can then be separated from the parent plant and grown as a new plant.

Grafting: Grafting involves taking a cutting from one plant (the scion) and joining it to the rootstock of another plant. This allows the grower to combine the desirable qualities of both plants into a single plant.

Tissue Culture: Tissue culture involves taking a small piece of tissue from the parent plant and growing it in a sterile, nutrient-rich environment. This method is often used for plants that are difficult to propagate through other means, and can also be used to produce a large number of identical plants.

The best method will depend on the specific requirements of the plant and the desired outcome. Some plants may respond better to one method over others, so it's important to do some research and choose the method that is best suited for your plant.

Answer:

Larger, because both the Sun and Moon are pulling it.

Explanation:

Explanation:

1)

A) Bb BB

B) 50%

2)

A) 50%

B) b. b

B. Bb. Bb

b. bb. bb

By multiplying mass and radius, the moment of inertia is computed.

The mass moment of inertia, also known as rotational inertia, of a body is a measure of its resistance to a change in the direction of its rotation or angular momentum. In essence, it describes the acceleration that an object or solid experiences when torque is applied.

The formula for the moment of inertia is "sum of the product of mass" of each particle with "square of its distance from the axis of rotation."inertia. I = miri2 is how the moment of inertia formula is written.

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Answer:

it’s an example of a generator.

Explanation:

Answer:

Generator

Explanation:

valid

Answer:

a. temperature of the substance increases.

Explanation:

Temperature is defined as a measure of the average kinetic energy of a substance, so as one rises, so will the other. They are directly proportional.

As the kinetic energy of the molecules in a substance increases, the temperature of the substance is also increases because kinetic energy and temperature is proportional to each other.

Kinetic energy is directly related to temperature which means if kinetic energy is increased, the temperature of the solution is also increased and vice versa.

So we can conclude that As the kinetic energy of the molecules in a substance increases, the temperature of the substance is also increases because kinetic energy and temperature is proportional to each other.

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No sunlight hits the portion of the moon that faces Earth during the new phase. Between new and complete phases are quarter phases.

Contrary to widespread opinion, Earth lacks a globally recognized name. A common misunderstanding of the earth's natural scientific name is "Terra."

Our own planet, Earth, is a world unto itself. Earth, the fourth from the sun, is the only planet in the known cosmos where the presence of life has been established. With a 3,959-mile radius, Earth is the fifth-largest planet within our solar system and the only one whose surface is known to have liquid water.

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Answer:

B. A large number of atoms move from one place to another

Explanation:

Convection is heat transfer by the movement of atoms of a substance from one region to another across a temperature gradient. Since atoms of solids are rigidly held in place, convection only occurs in liquids and gases since they flow.

Convection occurs when the temperature of one region of a fluid (liquid or gas) is higher than its other region. There is thus a mass movement of atoms from one region to the other due to a temperature difference. The atoms will continue to move to the region of lower temperature until the temperature of both regions are the same at an equilibrium temperature.

A statement which describes the changes that occur in this sequence of events is: 2. matter is converted into energy and then energy is converted into matter.

The law of conservation of matter (LOCOM) states that mass can neither be created nor destroyed in any chemical reaction.

Similarly, the energy possessed by a matter can neither be created nor destroyed, but it can only be converted from one energy form to another.

In this context, we can logically deduce that a statement which best describes the changes that occur in this sequence of events is that matter is converted into energy and subsequently, energy is converted into matter.

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The expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by E = Y * e * ln(L) * A

The work done to stretch the wire can be calculated by integrating the force applied over the displacement. In this case, the force applied is the tension (T) in the wire, and the displacement is the change in length (ΔL) from the original length (L) to the stretched length (L + ΔL).

The tension in the wire is given by Hooke's law, which states that the tension is proportional to the extension of the wire:

T = Y * (ΔL / L)

where Y is the Young's modulus of the material of the wire.

Now, let's calculate the work done to stretch the wire:

dW = T * dL

Integrating this expression from L to L + ΔL:

W = ∫ T * dL = ∫ Y * (ΔL / L) * dL

W = Y * ΔL * ∫ (dL / L)

W = Y * ΔL * ln(L) + C

Here, C is the constant of integration. Since the energy stored in the wire is zero when it is unstretched (ΔL = 0), we can set C = 0.

Finally, the expression for the energy stored in the wire (E) is:

E = W = Y * ΔL * ln(L)

or, if we substitute the cross-sectional area (A) and strain (e) of the wire, where e = ΔL / L:

E = Y * e * ln(L) * A

Thus, the expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by:

E = Y * e * ln(L) * A

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The car stopping short is the unbalanced force.

A force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newton (N). Force is represented by the symbol F.

When the resultant force acting on a body is not equal to zero, the forces acting on the body are known as unbalanced forces. The body acted upon by unbalanced forces changes its state of motion.

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The angle at which the roadway should be banked depends on the speed of the car, the radius of the curve, and the frictional force. So, the roadway should be banked at an angle of approximately 25.4 degrees

In this case, we know the speed of the car (15 m/s) and the radius of the curve (50 m), but we are told that the frictional force is zero due to icy conditions.

In the absence of friction, the only force that keeps the car moving in a circular path is the normal force exerted by the road on the car. This force acts perpendicular to the road surface and is proportional to the weight of the car. To keep the car moving in a circular path, the normal force must be directed toward the center of the curve. This can be achieved by banking the road.

The angle at which the road should be banked can be calculated using the following formula:

tan θ = v^2 / (r * g)

where θ is the angle of banking, v is the speed of the car, r is the radius of the curve, and g is the acceleration due to gravity (9.8 m/s^2).

Plugging in the given values, we get:

tan θ = (15 m/s)^2 / (50 m * 9.8 m/s^2)
tan θ = 0.459
θ = tan^-1 (0.459)
θ = 25.4 degrees

Therefore, the roadway should be banked at an angle of approximately 25.4 degrees to allow cars to negotiate the curve at 15 m/s even if the roadway is icy and the frictional force is zero.

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Answer:

D. The overall enthalpy change for a reaction is independent of the route the reaction takes.

Answer: Hess's law states that the overall enthalpy change for a reaction is independent of the route the reaction takes. Option D is correct.

It is given Hess's law.

It is required to state the Hess's law.

Thermochemical equations can be manipulated to give the data chemical reactions. We find exactly how much energy will be absorbed or released by the reaction because we may face various explosions.

There are mainly two ways to calculate ΔH of any reaction. First If the reaction has ΔH then the reverse of the reaction will have opposite ΔH and the second is if double the ΔH of the substances, double the ΔH.

Therefore Hess's law states that the overall enthalpy change for a reaction is independent of the route the reaction takes.

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b. The magnetic pull will cause the trains to drift apart, causing them to travel apart.

When a system with magnets is released and starts to move, how does magnetism impact the energy in the system?The system's potential energy is raised by the magnetic force.The system's kinetic energy is reduced by the magnetic force.

The method of magnetic levitation, or MagLev for short, involves applying powerful and spatially variable magnetic fields to an item in such a way as to counterbalance the weight of gravity. This allows the object to "float" off the ground.

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Nuclear Fusion is a process by which the nucleus of the two atoms fuses to form a completely new element. The Helium in the sun is produced by the process of nuclear fusion.

It is a process by which the nucleus of the two atoms fuses to form a completely new element.

For Example-

Therefore, the Helium in the sun is produced by the process of nuclear fusion.

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