An object is moving with a constant velocity of 278 m/s. How long will it take it to travel 7500 m? (kinematics equation 2)

Available options are:

A. –4500 N

B. –2500 N

C. 2500 N

D. 4500 N

Answer:

-4500 N

Explanation:

Given that we have F₁ = 3000N? (force of the barge)

the force of the tugboat is F '

To pull the barge, the force of the tugboat must be greater than or equal to the force of the barge.

Hence, according to Newton's third law which states that for every action or force in nature, there is an opposite reaction.

Therefore considering the available option the correct answer is "- 4500N, " this is because it is greater than the force of the barge and it's in opposition to the force exerted.

Answer:

The answer is -4500 N

Explanation:

Copper isn't ferromagnetic,

Aluminum isn't ferromagnetic,

String has a ferromagnetic property

Answer:

i think its aluminum

Explanation:

After watching the Ted Talk, there were still a few questions that I had about supermassive black holes. Firstly, I wanted to know more about the event horizon and what it exactly entails. Although the speaker briefly touched upon this subject, I would have appreciated a more in-depth explanation. Additionally, I would have liked to know more about the role of supermassive black holes in the universe.

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Therefore, the solution to the given system of equations is x = 0 and y = 0.

In this case, the system has a unique solution, which is the point (0, 0).

To solve the given system of equations using the substitution method, we'll solve one equation for one variable and substitute it into the other equation.

Let's start with the second equation: x - 3y = 0.

Solving this equation for x, we get:

x = 3y.

Now, substitute this expression for x in the first equation:

3x + 5y = 0

3(3y) + 5y = 0

9y + 5y = 0

14y = 0

y = 0.

Now that we have found the value of y, we can substitute it back into the equation x = 3y:

x = 3(0)

x = 0.

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The sum of the kinetic and potential energies of particles in an object called mechanical energy.

Mechanical energy is the energy possessed by an object due to its motion or due to its position. This energy is derived from the work done on an object.

It can be in the form of kinetic energy, the energy of motion; or in the form of potential energy, the energy an object has due to its position or shape.

Mechanical energy can be converted between the two forms, and is often converted into other forms, such as electrical energy or thermal energy.

Mechanical energy is used to power machines and devices, and is an important source of energy in the modern world.

Therefore, The sum of the kinetic and potential energies of particles in an object called mechanical energy.

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Answer:

\(F_{g}=7.4704\times10^{-5}\)

Explanation:

Givens: d = 1.0 × \(10^{4}\)  \(m_{1} = 4.0 x 10^{8}\)  \(m_{2} = 2.8\)×\(10^{5}\)

Required: \(F_{g}=?\)

Formula:  \(F_{g}= \frac{(6.67x10^{-11})(m_{1})(m_{2}) }{d^{2}}\)    (6.67x10^-11  is the gravitational constant)

\(F_{g}=\frac{\left(6.67\cdot10^{-11}\right)\left(4.0\cdot10^{8}\right)\left(2.8\cdot10^{5}\right)}{\left(1.0\cdot10^{4}\right)^{2}}\)

\(F_{g}=7.4704\times10^{-5}\)

Answer:

Which parental qualities promote healthy child development? Check all that apply.

patient

dependable

lenient

disciplined

wealthy

Explanation:

A, B, D

The expansion of a 13L steel scuba tank can be ignored when evaluating the mass of air inside because the volume increase due to expansion is very small compared to the tank's original volume. It is a good approximation.

The expansion of a 13L steel scuba tank occurs due to changes in temperature and pressure. When the tank is filled with air, the air inside the tank is also affected by these changes. However, the volume increase due to expansion is typically very small compared to the original volume of the tank. As a result, the mass of air inside the tank can be evaluated without taking into account the expansion of the tank. This is a good approximation because the expansion is negligible in comparison to the total volume of the tank. However, it's worth noting that if a more precise calculation is required, the expansion of the tank should be taken into account.

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Answer:

rate= 5000 m/million years

Explanation:

In order to find this rate, we must divide the number of meters it has moved into the number of years it took the plate to move that distance, so we get:

\(rate=\frac{distance}{#years}\)

\( rate=\frac{125,000 meters}{25 million years}\)

rate= 5000 m/million years.

Answer: 5 mm/year, 5000 meters east, new ocean floor

Explanation:

The material which are neither good conductors nor insulators of electricity are called semiconductors.

Semiconductors are materials that have an electrical conductivity that falls between that of conductors and insulators. They are neither good conductors nor insulators of electricity, but their conductivity can be controlled by adding impurities to the material. This process is called doping, and it can increase or decrease the conductivity of the semiconductor.

In their purest form, semiconductors are poor conductors of electricity because they have few free electrons available for conduction. However, when impurities are added, the semiconductor can become an n-type or p-type material, which have an excess of electrons or holes, respectively. These excess electrons or holes are then able to move through the material and conduct electricity.

Semiconductors are used in a wide range of electronic devices, including transistors, diodes, solar cells, and microchips. They are essential components in modern electronics, and their unique electrical properties make them incredibly useful for controlling and manipulating electrical signals.

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Answer:

key is not the component of circuit

Answer:

c. Key

Explanation:

All the others make sense.

Answer:

Explanation:

1. If we increase the distance to twice it's original value, the light intensity is reduced by one-fourth, the light intensity would be:

I0/4

2. rms magnetic field is inversely proportional to distance, so the new rms magnetic field would be:

B0/2

3. average energy density is inversely proportional to the square of the distance, so the new average energy density is:

E0/4

When capacitors are connected in parallel, the equivalent capacitance is the sum of the individual capacitances. This occurs because the added capacitors increase the total charge storage capacity and allow for a greater flow of charge.

Kylie explains to Blake that when capacitors are connected in parallel, the plates of each capacitor are effectively connected together. This arrangement creates multiple paths for the charges to flow. As a result, the total charge storage capacity increases, allowing more charge to be stored.

When a potential difference (voltage) is applied across the parallel combination of capacitors, the charges redistribute themselves among the capacitors based on their individual capacitances. Capacitors with higher capacitance can store more charge for the same potential difference.

The total charge stored in the parallel combination is the sum of the charges stored in each individual capacitor. Since the charge stored is directly proportional to the capacitance, adding capacitors in parallel increases the overall charge storage capacity.

Consequently, the equivalent capacitance (Ceq) of capacitors connected in parallel is the sum of the individual capacitances (C1, C2, C3, and so on):

Ceq = C1 + C2 + C3 + ...

This property of capacitors in parallel allows for increased capacitance and enhanced energy storage capabilities in electronic circuits.

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The Beretta Model 92S, which is the standard-issue U.S. Army pistol, has a barrel that is 127 mm long. The bullets that are fired from this barrel have a muzzle velocity of 349 m/s. The barrel length of the Beretta Model 92S is 127 mm, and the bullets leave the barrel with a muzzle velocity of 349 m/s.

The barrel length refers to the distance from the chamber to the muzzle of the pistol. In this case, the barrel is 127 mm long, indicating the bullet's path inside the firearm before exiting. The muzzle velocity refers to the speed at which the bullet travels as it leaves the barrel. For the Beretta Model 92S, the bullets achieve a velocity of 349 m/s when fired.
In summary, the Beretta Model 92S has a barrel length of 127 mm, and the bullets it fires have a muzzle velocity of 349 m/s.

The barrel length of the Beretta Model 92S is 127 mm, which is the distance from the chamber to the muzzle of the pistol. This measurement indicates the bullet's path inside the firearm before it exits the barrel. When the Beretta Model 92S is fired, the bullets achieve a muzzle velocity of 349 m/s. Muzzle velocity refers to the speed at which the bullet travels as it leaves the barrel. It is an important factor in determining the bullet's accuracy and trajectory. The 349 m/s muzzle velocity of the Beretta Model 92S suggests that the bullets are propelled at a high speed.

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From the calculation;

1) Melting point of indium = 171.4°

2) The resistance is 52.9 ohm

3) The power dissipated is  834 W

The temperature coefficient of resistance is a measure of how much the resistance of a material changes with temperature. It quantifies the relationship between the change in resistance and the change in temperature.

We have that;

R1/R2 = (1 + αt1)/(1 + αt2)

50/76.8 = (1 + (3.92 * \(10^-3\) * 20))/(1 +  (3.92 *\(10^-3\) * t))

0.65 = 1.0784/1 + 0.00392t

0.65(1 + 0.00392t) =  1.0784

0.65 + 0.0025t = 1.0784

t = 171.4°

P = \(V^2\)/R

R = \(V^2\)/P

R = \(230^2\)/1000

R = 52.9 ohm

The new power is;

P =\(210^2\)/52.9

P = 834 W

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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:

If the initial speed was 10 m/s, then a 9.0% increase in speed would result in a 19% increase in distance.

We can see that the increase in distance is proportional to the square of the initial speed, so even a small increase in speed will result in a significant increase in distance.

\(d = (v^2)/2g\)

where d is the distance traveled during the jump, v is the speed of the object or person during the jump, and g is the acceleration due to gravity.

If the speed is increased by 9.0%, then the new speed will be:

\(v_new = v + 0.09v = 1.09v\)

So the new distance traveled during the jump will be:

\(d_new = (v_new^2)/2g = [(1.09v)^2]/2g = 1.19(v^2)/2g\)

The increase in distance is therefore:

\(d = d_new - d = 1.19(v^2)/2g - (v^2)/2g = 0.19(v^2)/2g\)

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The acceleration of the block is 6.4 m/s².

To calculate the acceleration of the block, we need to consider the forces acting on it.

The applied force is 40 N, and since it is the only horizontal force in the direction of motion, it is the net force acting on the block.

The frictional force opposing the motion is 8 N.

The acceleration, we can use Newton's second law, which states that the net force acting on an object is equal to its mass multiplied by its acceleration (F = ma).

The net force is the difference between the applied force and the frictional force:

40 N - 8 N = 32 N.

Now, we can plug the values into Newton's second law:

32 N = 5 kg × a.

Solving for the acceleration (a), we get

a = 32 N / 5 kg

a = 6.4 m/s².

Therefore, the acceleration of the block is 6.4 m/s².

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The purpose of the helical structure in a traveling-wave tube is to (d) enhance the bunching effect that occurs for the positive charge carriers in the electron beam.

The helical structure in a traveling-wave tube serves as an interaction circuit between the electron beam and the electromagnetic wave. The interaction between the beam and the wave leads to a phenomenon known as bunching, where the electrons in the beam are grouped together in a more compact manner. Bunching is crucial for efficient energy transfer from the electron beam to the electromagnetic wave.

The helical structure plays a key role in enhancing this bunching effect. As the electron beam travels through the helix, the helical structure provides a periodic electric field that interacts with the beam. This interaction causes the electrons to experience a force that synchronizes their motion with the electromagnetic wave. The synchronized motion results in the formation of electron bunches or density modulations within the beam.

By enhancing the bunching effect, the helical structure increases the efficiency of energy transfer from the electron beam to the electromagnetic wave. The bunches of electrons in the beam interact more effectively with the electromagnetic wave, leading to greater amplification and modulation of the signal carried by the wave.

It's important to note that the other options mentioned, such as (a) forming a helical resonator, (b) serving as an inductor, or (c) reducing the speed of the electromagnetic wave, are not the primary functions of the helical structure in a traveling-wave tube. While resonators and inductors can be present in the design of a traveling-wave tube, their functions are separate from the role of the helical structure in enhancing bunching and facilitating efficient energy transfer.

Therefore, in a traveling-wave tube, the primary purpose of the helical structure is to enhance the bunching effect for positive charge carriers in the electron beam, leading to improved energy transfer and amplification of the signal carried by the electromagnetic wave.

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Answer:

4.2 is the answer

Explanation

The image formed in a plane mirror is an equal distance behind the mirror as the object in front of it.

Step 1: the equation to this problem would be: 8.4/2

Step 2: 8.4 ÷ 2 = 4.2

Hope you could understand.

If you have any query, feel free to ask.

Answer ideal mechanical advantage

Answer:

1.05kg

Explanation:

Soln

Kinetic energy = 475 J

Velocity = 30.0m/s

mass = ?

Recall,

Kinetic energy = 1/2 × mass × (velocity)²

K.E = 1/2 × m × v²

475 = 1/2 × m × (30)²

475 = 1/2 × m × 900

475 = m × 450

divide both sides by 450

475/450 = m

m = 475/450

m = 1.05kg

Answer:

Demagnetizing a magnet :

The elastic modulus parallel to the fibers of a composite material made of type E-glass fibers embedded in a matrix of ABS plastic, with all fibers to be aligned in the same direction can be calculated as follows:First, we need to calculate the elastic modulus of each component of the composite material.

The elastic modulus of type E-glass fibers is 72 GPa, and the elastic modulus of ABS plastic is 2.5 GPa.Next, we need to calculate the volume fraction of each component. If we assume that the composite material is made up of 60% type E-glass fibers and 40% ABS plastic, then the volume fraction of type E-glass fibers is 0.6, and the volume fraction of ABS plastic is 0.4.

Finally, we can use the rule of mixtures to calculate the elastic modulus parallel to the fibers. The rule of mixtures states that the elastic modulus of a composite material is equal to the weighted average of the elastic moduli of the individual components, where the weights are the volume fractions.

Therefore, the elastic modulus parallel to the fibers is given by:

Elastic modulus parallel to fibers = (Volume fraction of type E-glass fibers x Elastic modulus of type E-glass fibers) + (Volume fraction of ABS plastic x Elastic modulus of ABS plastic)

Elastic modulus parallel to fibers = (0.6 x 72 GPa) + (0.4 x 2.5 GPa)

Elastic modulus parallel to fibers = 43.5 GPaSo, the elastic modulus parallel to the fibers of the composite material is 43.5 GPa.

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If the rods in your eye were selectively damaged by the supervillain, you would experience reduced vision in dim light and an inability to see color. This is because rods are responsible for vision in low light and do not detect color, while cones are responsible for color vision and work best in bright light.

If the cones in your eye were damaged instead, you would experience reduced color vision and an inability to see clearly in bright light. This is because cones are responsible for color vision and work best in bright light, while rods are responsible for vision in low light and do not detect color.

It really depends on the individual and their needs. If you are a person who spends a lot of time in low light, you may want to keep the rods intact so that you can still see in dim light. On the other hand, if you are someone who needs to distinguish between colors, you may want to keep the cones intact so that you can still see colors.

Yes, this choice would change if you were a nonhuman animal, since different species have different levels of light vision and color vision. For example, some animals, such as cats, have sharper vision in low light, while others, such as birds, have sharper color vision. Depending on the species and the needs of the animal, they may want to keep either rods or cones intact.

The typical shock absorber is made to lessen both the shock, or "jounce," felt during compression strokes and the amount of rebound felt during rebound strokes.

The shock absorber uses hydraulic pressure during compression strokes to slow down and absorb the shock, or jounce, of the vehicle when it travels over bumps or potholes. The kinetic energy of the shock is transformed into thermal energy by a piston, cylinder, and hydraulic fluid, which work together to accomplish this. The shock absorber works to lessen the vehicle's rebound or bounce during rebound strokes, making the ride more comfortable. It accomplishes this by utilizing a valve to control the hydraulic fluid's flow and produce resistance, which aids in absorbing the rebound's energy.

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The expression for the object's speed at the bottom of the slope is:

v = sqrt(2gh - 2gLsinθ/mu_k)

To solve this problem, we can use the conservation of energy principle, which states that the total energy of a system remains constant as long as there are no external forces acting on it.

At the top of the slope, the object has only potential energy, given by:

Ep = mgh

where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the slope.

As the object slides down the slope, it loses potential energy and gains kinetic energy. The work done by the force of gravity is equal to the change in potential energy, so we have:

mgLsinθ = mgh - (1/2)mv^2

where θ is the angle of the slope, and v is the speed of the object at the bottom of the slope. The left-hand side of this equation represents the work done by the force of gravity as the object slides down the slope, while the right-hand side represents the loss of potential energy and the gain of kinetic energy.

Solving for v, we get:

v = sqrt(2gh - 2gLsinθ/mu_k)

where mu_k is the coefficient of kinetic friction between the object and the surface.

Therefore, the expression for the object's speed at the bottom of the slope is:

v = sqrt(2gh - 2gLsinθ/mu_k)

in terms of the variables m, mu_k, L, h, and appropriate constants.

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The given question is incomplete, the complete question is:

An object of mass m is at rest at the top of a smooth slope of height h and length L. The coefficient of kinetic friction between the object and the surface, mu k, is small enough that the object will slide down the slope if given a very small push to get it started. Part A Find an expression for the object's speed at the bottom of the slope. Express your answer in terms of the variables m, mu k, L, h, and appropriate constants.

The tension in the lower segment of the belt is 219 N. To find the tension in the lower segment of the belt, we can start by analyzing the forces acting on the flywheel.

The net torque acting on the flywheel can be expressed as the product of its moment of inertia and angular acceleration, given by the equation:

\(\[ \tau = I \alpha \]\)

Since the axle is frictionless, the only torque acting on the flywheel is due to the tension in the lower segment of the belt. The moment of inertia of a solid disk can be calculated using the equation:

\(\[ I = \frac{1}{2} m r^2 \]\)

where m is the mass of the flywheel and r is its radius. Substituting this into the torque equation, we have:

\(\[ T_{\text{u}} \cdot r_{\text{pulley}} = \frac{1}{2} m r^2 \cdot \alpha \]\)

Rearranging the equation, we can solve for the tension in the lower segment of the belt:

\(\[ T_{\text{u}} = \frac{1}{2} \frac{m r^2 \alpha}{r_{\text{pulley}}} \]\)

Plugging in the given values, with the mass of the flywheel (m = 66.5 kg), radius of the flywheel (r = 0.625 m), radius of the pulley \((r_{\text{pulley}} = 0.230 m)\), and the angular acceleration \((\alpha = 1.67 rad/s^2)\), we can calculate the tension in the lower segment of the belt:

\(\[ T_{\text{u}} = \frac{1}{2} \frac{66.5 \cdot 0.625^2 \cdot 1.67}{0.230} = 219 \, \text{N} \]\)

Therefore, the tension in the lower segment of the belt is 219 N.

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Answer:

4,275

Explanation:

formula:1/2mv square

1/2×190×45=4,275

Answer:

400 meters

Explanation:

using the equation:

Hopefully this helps.