how much current could an 18-gauge wire (see example 25.1 in section 25.1) of this material carry and still remain superconducting?

Answer:

v = 4.79 10³ m / s

Explanation:

For this exercise we will use the universal law of gravitation and Newton's second law

          F = G M m / r²

where G is the gravitational constant, m the mass of the satellite, M the mass of the Earth, r the distance from the center of the planet to the satellite

           F = m a

since the satellite has a circular path, the acceleration is centripetal

          a = v² / r

we substitute

          G M m / r² = m v² / r

           G M / r = v²

We calculate

          v² = 6.67 10⁻¹¹ 5.98 10²⁴ / 6.96 10⁶

          v = √ (22.94 10⁶)

          v = 4.79 10³ m / s

Answer:

7570 m/s

Explanation:

take the square root of: 6.67E-11× 5.98E24/6.96E6

The reason that most seti programs choose to listen at microwave radio frequencies is that They have an ability of transmitting along a vast range of frequencies without any overlap .

Microwaves are the most energy efficient way to send information In electromagnetic spectrum, microwaves comes  between radio waves and infrared waves. They are high frequency waves and their wavelengths are short . Due to which they are used in radio and television broadcasting too . They have an ability of transmitting along a vast range of frequencies without any overlap . Hence , most seti programs choose to listen at microwave radio frequencies .

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k/m = (2 * g * Δh) / [((1 - 0.79) * original length)^2] - (2 * g * Δh) * 0.21 / E

To determine the ratio of the spring constant to the helicopter's mass, we need to consider the change in potential energy and the work done by the shock absorbers.

Change in Potential Energy:

The change in potential energy of the helicopter as it descends can be calculated using the formula: ΔPE = mgh, where m is the mass of the helicopter, g is the acceleration due to gravity, and h is the change in height.

In this case, the helicopter descends vertically, so the change in height is equal to the compression of the shock absorbers.

ΔPE = mgΔh

Work Done by the Shock Absorbers:

The work done by the shock absorbers can be calculated using the formula: W = (1/2)kΔx^2, where k is the spring constant and Δx is the change in length of the shock absorbers.

In this case, the shock absorbers compress to 79% of their original length, which means the change in length is Δx = (1 - 0.79) * original length.

W = (1/2)k[(1 - 0.79) * original length]^2

Energy Absorbed by the Air in the Tires:

The energy absorbed by the air in the tires can be calculated as a percentage of the initial energy. Let's denote the initial energy as E.

Energy absorbed = 0.21 * E

Since the energy absorbed by the air in the tires is heat energy, it does not contribute to the work done by the shock absorbers.

Equating the Energy:

The change in potential energy is equal to the sum of the work done by the shock absorbers and the energy absorbed by the air in the tires:

ΔPE = W + Energy absorbed

mgΔh = (1/2)k[(1 - 0.79) * original length]^2 + 0.21 * E

Now we can solve for the ratio of the spring constant (k) to the helicopter's mass (m):

k/m = (2 * g * Δh) / [((1 - 0.79) * original length)^2] - (2 * g * Δh) * 0.21 / E

Please note that to obtain a specific numerical value for the ratio, we would need to know the values of g, Δh, original length, and E.

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Well as you've seen before most likely, an apple can fall right off a tree, and stay perfectly fine. its all dependent on the variables. What angle is the apple falling at? Whats the speed, height, even the size of the apple? We must take into aware anything can happen, but its all behind the variables.

Brainliest if helpful

P.S Fact Check with the second person who just answered

Answer:

yes

Explanation:

i had an apple tree and it happens all the time most often they don't break open.

Here's the fact that you need to know:

"The AREA under a speed/time graph is the distance traveled during the time covered by the graph."

Now ... What's the area of that nice trapezoid on the graph ?

Hint: Area of a trapezoid is

(1/2) • (height) • (base-1 + base-2)

In Florida, it is illegal to operate any vessel at a speed that endangers the life, limb, or property of any person or creates a wake in a no-wake zone.

. The state of Florida has established a number of speed limits for various waterways, and it is the responsibility of the vessel operator to know and adhere to these limits.

Speed limits may vary depending on the location, time of day, weather conditions, and type of vessel being operated. It is important to note that reckless or careless operation of a vessel is also illegal in Florida, and can result in fines, imprisonment, and even the revocation of boating privileges.

It is the responsibility of all boaters to operate their vessels in a safe and responsible manner, while adhering to all state and federal boating laws and regulations.

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In Florida, it is illegal to operate any vessel at a speed that endangers life, limb, or property. Vessel speed limits may vary, but it is important to operate the vessel safely and responsibly.

In Florida, it is illegal to operate any vessel at a speed that endangers life, limb, or property. The specific speed limits may vary depending on the location and type of vessel, but the general rule is to always operate the vessel safely and responsibly. For example, in certain areas, there may be posted speed limits for specific bodies of water, such as slow speed zones or no-wake zones near residential areas or marinas.

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Answer:

A ( Jack did twice as much work as Jill

Explanation:

Answer:

A Matter is not created or destroyed and the same amount of mass remains

Explanation:

In a chemical reaction, according to the law of conservation of matter, "matter is neither created nor destroyed and the same amount of mass remains in such a process".

The given statement "scientists are concerned about the decrease in ozone is allowing more ultraviolet" is true because ozone is a molecule made up of three oxygen atoms that exist in the Earth's atmosphere. It's a form of oxygen that absorbs almost all of the Sun's harmful ultraviolet light.

Ultraviolet rays are very harmful to humans, causing skin cancer, immune system breakdowns, and cataracts in the eyes. When the ozone layer is damaged or thinned, it can allow more ultraviolet rays to penetrate the atmosphere, which is why scientists are so concerned about ozone depletion.What are the impacts of ozone depletion?It is estimated that a 1% reduction in the ozone layer increases the incidence of non-melanoma skin cancer by 2%.A decrease of 10% in the ozone layer may result in a 20% increase in the incidence of skin cancer.The thinning of the ozone layer may result in a decrease in plant production, which may result in food supply shortages.A decrease in ozone may have an impact on phytoplankton, which play a crucial role in ocean food webs. These tiny creatures consume carbon dioxide and produce half of the world's oxygen. As phytoplankton numbers decline, ocean ecosystems may change, affecting everything from fish populations to weather patterns.

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Answer:

The correct answer is H ÷ ¹/₂T

Explanation:

The formula for velocity is distance covered ÷ time.

Neglecting air resistance;

If the ball's time of overall time flight is T, the time it will take for the second half/return trip is ¹/₂T.

If the ball's maximum height above its released point is H, the height will also be the distance it covered for the second part of the trip since the student caught the ball in the exact same place the ball was thrown. Hence, the distance for the second half of the trip will be H.

Since velocity = distance/time

The average velocity during the second half of the trip will be = H ÷ ¹/₂T

So, the coefficient of kinetic friction approximately 0.21.

Hi ! Here I will help you to solve the problem of the coefficient of kinetic friction. An object that experiences kinetic friction, indicates that the object move from its place. Remember that friction is also a force, but reduces the value of the force acting. Kinetic friction force is influenced by the normal force (N) and the coefficient of kinetic friction. The greater the value of the normal force (N) and/or the coefficient of friction, the greater the value of the kinetic friction force. [See the attached image to see the breakdown of the friction force].

For kinetic friction, there are the following equations that you will use in various problem conditions. However, the equation in the box is the formula you use for solve this problem.

\(\sf{\sum F = m \cdot a}\)

\(\sf{F - f_k = m \cdot a}\)

\(\boxed{\sf{\bold{F - \mu_k \cdot m \cdot g = m \cdot a}}}\)

With the following condition:

We know that:

What was asked ?

Step by step:

\(\sf{F - \mu_k \cdot m \cdot g = m \cdot a}\)

\(\sf{300 - \mu_k \cdot 145 \cdot 9.8 = 145 \cdot 0}\)

\(\sf{-\mu_k \cdot 1,421 = -300}\)

\(\sf{\mu_k = \frac{-300}{-1,421}}\)

\(\boxed{\sf{\mu_k \approx 0.21}}\)

So, the coefficient of kinetic friction approximately 0.21.

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The linear probability model contains heteroskedasticity unless b. the independent variables are binary

What is Heteroskedasticity?

Heteroskedasticity refers to the violation of the assumption in a linear regression model that the variance of the error term is constant across all levels of the independent variables. In other words, it means that the variability of the error term is not the same for all observations.

The linear probability model is a specific type of linear regression model used when the dependent variable is binary (taking on values of 0 or 1). In this model, the assumption of constant variance (homoskedasticity) is violated unless the independent variables are binary.

When the independent variables in the linear probability model are binary, the error term's variance is constant for each level of the binary variables. This ensures that heteroskedasticity is not present in the model.

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The term that describes weathering breaks down the rock. Weathering is the breakdown of rocks, soil, and other geological material under the influence of physical, chemical, or biological agents.

The term weathering refers to a variety of processes that wear away or weaken rocks over time. Weathering is classified into two categories: chemical and physical. Chemical weathering occurs when rock is chemically broken down by reactions with acid rain or other chemicals.

Physical weathering, on the other hand, occurs when rock is broken down into smaller pieces by water, wind, ice, or other forces that do not change the chemical composition of the rock. In conclusion, the term that describes weathering is breaking down the rock.

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Answer:

Both eggs are identical. The aim is to find out the highest floor from which an egg will not break when dropped out of a window from that floor. If an egg is dropped and does not break, it is undamaged and can be dropped again. However, once an egg is broken, that's it for that egg.

Answer:

The answer is gravity

Explanation: Hope this helps:)

Answer:

The bimetallic strip in a fire alarm is made of two metals with different expansion rates bonded together to form one piece of metal. ... When the strip touches that contact, it completes a circuit that triggers the alarm to sound.

The body lost approximately 1.2047 x 10^20 electrons.

The charge of an electron is -1.602 x 10^-19 coulombs, which means that a loss of 20 grams of electrons is equivalent to a loss of (20/0.000911) moles of electrons, since the molar mass of electrons is 0.000911 grams/mole.

One mole of electrons contains 6.022 x 10^23 electrons (Avogadro's number), so the body lost (20/0.000911) x 6.022 x 10^23 electrons, which simplifies to approximately 1.2047 x 10^20 electrons. Therefore, the body lost approximately 1.2047 x 10^20 electrons.

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Answer:

lightning KILLUAAAA

Answer:

1. 50 meters

2. average velocity (?)

Explanation:

Vot + 1/2 at^2

= 0 (10) + 1/2(1)(10)^2

= 0 + 1/2 (1)(10)^2

= 1/2 (1) (100)

= 1/2 (100)

= 50

The wind turbine with a blade diameter of 25 m and an average wind velocity of 6 m/s has an average electric power output of 172.34 kW. For an annual operating time of 8000 hours, the turbine will produce approximately 1,378,720 kWh of electricity.

If sold at a price of $0.09/kWh, the revenue generated from the electricity produced by the turbine would be approximately $124,086.72. To calculate the average electric power output, we can use the formula:

\(\[P = \frac{1}{2} \times \text{{density of air}} \times A \times v^3 \times \text{{efficiency}}\]\)

Substituting the given values into the formula, we can calculate the average electric power output:

\(\[P = \frac{1}{2} \times 1.3 \, \text{{kg/m}}^3 \times \left(\frac{\pi}{4} \times (25 \, \text{{m}})^2\right) \times (6 \, \text{{m/s}})^3 \times 0.34 \approx 172340 \, \text{{watts}} \approx 172.34 \, \text{{kW}}\]\)

To determine the amount of electricity produced for an annual operating time of 8000 hours, we multiply the average electric power output by the operating time:

\(\[\text{{Electricity produced}} = P \times \text{{operating time}} = 172.34 \, \text{{kW}} \times 8000 \, \text{{h}} = 1,378,720 \, \text{{kWh}}\]\)

Finally, to calculate the revenue generated, we multiply the electricity produced by the selling price per kilowatt-hour:

\(\[\text{{Revenue}} = \text{{Electricity produced}} \times \text{{price per kWh}} = 1,378,720 \, \text{{kWh}} \times \$0.09/\text{{kWh}} \approx \$124,086.72\]\)

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Answer:

c. gravitational attraction between the sun and earth

The gravitational attraction between the Sun and the Earth is exactly modeled by the tension in the string.  (C)

This is an excellent demonstration !  It shows:

-- If she uses a heavier ball (more mass), she gets more tension in the string, just like planets.

-- If she wants the ball (planet) to revolve faster, she has to increase the tension in the string.

-- If she lets out a longer string, the ball moves slower, and there's less tension in the string, just like planets.

-- The ball stays in the same plane all the way around, just like planets.

The pendulum was raised to an angle of approximately 1.05 degrees before being released.

The frequency range heard by the observer standing in the plane of the pendulum's motion is due to the Doppler effect. When the pendulum swings towards the observer, the frequency of the sound waves increases, and when it swings away, the frequency decreases. The difference between the maximum and minimum frequency heard is twice the frequency of the pendulum's motion.

We can use the formula for the frequency of a simple pendulum: f = (1/2π) √(g/l), where g is the acceleration due to gravity and l is the length of the pendulum.

Solving for l, we get l = g(1/(2πf))^2.

Substituting g = 9.8 m/s^2, f = 1024 Hz, and l = 1.2 m + string length, we get the length of the string to be 0.251 m.

Now, using the formula for the period of a simple pendulum: T = 2π √(l/g), we can find the time it takes for the pendulum to complete one swing. T = 0.986 seconds.

The range of frequencies heard by the observer is 8 Hz, which is twice the frequency of the pendulum's motion. So, the maximum frequency is 1028 Hz, and the minimum is 1020 Hz.

Using the formula for the Doppler effect: Δf/f = v/cosθ, where Δf is the frequency shift, v is the speed of the pendulum, and θ is the angle between the pendulum and the observer.

Solving for θ, we get θ = cos^-1(vΔf/(fvc)).

Substituting v = 1.2 m/T, Δf = 4 Hz (half the frequency range), f = 1024 Hz, and c = 340 m/s, we get the angle to be 1.05 degrees.

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Answer:

See the answers below.

Explanation:

1

The data of 100W means power, and the other data of 220V means voltage, that is to say that bulb serves to work at a voltage of 220V100W datum means power.

J means work that is given in Joules [J], we must remember that power is defined as the relationship between work at a certain time, therefore we can determine work by means of the following expression.

\(P=W/t\\\)

where:

P = power [Watt]

W = work [J]

t = time [s]

\(W=P*t\\W=100*5[hr]*[\frac{3600s}{1hr} ]\\W=1800000[J] = 1.8[MJ]\)

Now the electric cost.

\(0.1[kW]*5[hr]*55\frac{LL}{1kwhr} =27.5[LL]\)

2

We know that power is defined as the product of voltage by resistance.

\(P=V*I\)

where:

P = power [W]

V = voltage [V]

I = current [amp]

\(I=P/V\\I=1500/220\\I=6.82[amp]\)

3

The voltage can be calculated by means of ohm's law, which tells us that the voltage is equal to the product of resistance by the current.

\(V =I*R\)

where:

V = voltage [V]

I = current = 20 [mA] = 0.02 [A]

R = resistance = 20 [kΩ] = 20000 [Ω]

Now replacing:

\(V = 0.02*20000\\V = 400 [V]\)

4

According to the figure we see that when the current is equal to 10 [mA] the voltage is equal to 1 [V]. With these two values, we can use ohm's law and find the value for the resistance.

\(V = I*R\\R = V/I\\R = 1/0.01\\R =100 [ohm]\)

Answer:

740.55

Explanation:

845.54 + -104.99

=740.55

The slope of position versus time graph represent the velocity.

position vs. time graph attached below.

In a position-time graph, the velocity of the moving object is represented by the slope of the graph line.

So, the position vs. time graph for a person walking at a  constant speed of 1 m/s for 10 seconds will be a straight line having slope of 1 in the interval of 0 to 10 seconds.

Similarly,  the position vs. time graph for a person walking at a  constant speed of 4 m/s for 10 seconds will be a straight line having slope of 4 in the interval of 0 to 10 seconds.

Graph attached below.

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The attraction between masses as small as our bodies, or even objects the size of skyscrapers, is incredibly small. For example, two 1.0-kg masses located 1.0 meter apart exert a force of 6.7×10−11N 6.7 × 10 − 11 N on each other.Answer:

Explanation:

Even between objects the size of skyscrapers or masses as small as our bodies, there is incredibly little attraction. For instance, a force of 6.71011N is generated when two 1.0-kg masses are placed 1.0 meters apart. 6.7 10 11 N on top of one another.

M/s2 is its SI unit. Its vector nature—which includes both magnitude and direction—makes it a quantity. The unit g stands for gravitational acceleration. At sea level, the standard value of g on earth's surface is 9.8 m/s2.

The magnitude of PQ is represented symbolically as | PQ |. The Distance Formula can be used to determine a vector's magnitude if its start and end points' coordinates are known.

Therefore, The distance between a vector's starting point P and ending point Q is its magnitude.

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The three product which can be potentially fail considering Load Strength graph and precautionary measure to prevent failure are as below;

Ball Pen:

1. Ink Leakage: One potential failure of a ball pen is ink leakage. This can occur due to poor sealing between the ink reservoir and the ballpoint mechanism. Ink leakage can result in messy hands, stained documents, and reduced functionality of the pen. To prevent this failure, manufacturers can improve the quality control process to ensure proper sealing and use high-quality materials for the pen's components.

2. Ballpoint Jamming: Another failure is ballpoint jamming, where the ball gets stuck and prevents smooth writing. This can be caused by a buildup of dried ink or debris inside the pen's mechanism. To prevent ballpoint jamming, regular cleaning and maintenance of the pen can be recommended. Additionally, manufacturers can design the pen with features that facilitate easy cleaning or provide instructions on how to clear any blockages.

3. Weak Barrel Construction: The barrel of the pen may also be prone to failure if it is weak or brittle. Excessive pressure or rough handling can lead to cracks or breakage, rendering the pen unusable. To prevent this, manufacturers can use durable materials for the pen barrel, such as sturdy plastics or reinforced metal, and perform quality checks to ensure structural integrity.

Room Key:

1. Keycard Malfunction: A potential failure of a room key is a malfunction in its electronic components. This can result in the keycard being unreadable by the door lock system, preventing access to the room. To prevent this failure, regular maintenance and replacement of keycard readers can be implemented. Additionally, guests should be advised to keep their keycards away from magnets and electronic devices that can interfere with the card's functionality.

2. Magnetic Strip Damage: Another failure can occur if the magnetic strip on the keycard gets damaged or demagnetized. This can happen due to exposure to magnetic fields or physical damage. To prevent this failure, keycards can be made more durable with protective coatings or alternative technologies such as RFID. Guests should also be educated on proper handling and storage of keycards to avoid damage.

3. Battery Drain: Some room keys use batteries to power their electronic components. A failure can occur if the battery drains, leading to an inactive keycard. To prevent this, low-power consumption designs can be implemented, and regular battery checks or replacements can be carried out by hotel staff. Guests should be informed about the importance of returning the keycard to the front desk for recycling or proper disposal to ensure the battery is replaced as needed.

Blender:

1. Motor Burnout: One potential failure of a blender is motor burnout due to prolonged use or overloading. Continuous operation at high speeds or attempting to blend hard or frozen ingredients beyond the blender's capacity can cause the motor to overheat and fail. To prevent motor burnout, manufacturers can provide clear guidelines on the maximum load capacity and recommended usage durations. Automatic thermal protection mechanisms can also be incorporated to shut off the blender if it detects excessive heat.

2. Blade Jamming: Another failure can occur if food particles or ingredients get jammed between the blender's blades, preventing them from spinning freely. This can happen if the blender is not properly cleaned or if ingredients are not adequately prepared before blending. To prevent blade jamming, users should be advised to clean the blender thoroughly after each use and ensure that ingredients are cut into manageable sizes. Manufacturers can also design blades with accessible mechanisms for easy cleaning or provide cleaning tools.

3. Leakage: A failure in a blender can also manifest as leakage. This can happen if the blender jar or its sealing components are damaged or improperly assembled. Liquid or food can leak out during blending, resulting in a messy and potentially unsafe situation. To prevent leakage, manufacturers should ensure proper sealing mechanisms and use high-quality materials for the blender jar and lid. Regular inspection of the sealing components can be advised,

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Answer:

yea what the other guy said