An electricity-generating station needs to deliver 20 MW of power to a city 1.0 km away. A common voltage for commercial power generators is 22 kV, but a step-up transformer is used to boost the voltage to 230 kV before transmission.
(a) If the resistance of the wires is 2.0 ohms and the electricity costs about 10 cents/kWh, estimate what it costs the utility company to send the power to the city for one day?

Answer:

Brakes unevenly adjusted: Brakes pulling in one direction or the other can lead to a skid. Tires with worn tread: Tread is necessary for traction in wet weather

Explanation:

Answer: exhaust pipe

Explanation: It doesn't really control anything so I'm assuming this is the answer

Answer:

(a) r = 328 m

(b) F = 6271.8 N

Explanation:

speed, v = 540 km/h = 150 m/s

Acceleration, a = 7 g

(a) Let the radius is r.

\(a =\frac{v^{2}}{r}\\7\times 9.8 = \frac{150\times 150}{r}\\r = 328 m\)

(b) The force on 80 kg pilot at the lowest point is

\(F =m \times g + m\frac{v^{2}}{r}\\F = 80\times9.8 +80\times \frac{150\times 150}{328}\\\\F =784 + 5487.8 = 6271.8 N\)

1. Gas particles move randomly and rapidly in all directions and collide with each other and the walls of the container, creating pressure, 2. Liquids and solids have more ordered and restricted motion compared to gases, 3. Solids have fixed positions, liquids can move around each other, and gases move rapidly in all directions, and 4. The phase diagram shows the relationships between the states of matter at different temperatures and pressures and is important for predicting the behavior of substances and optimizing chemical reactions.

A phase diagram is a graph that shows the relationships between the different states of matter of a substance at different temperatures and pressures, providing information on the behavior of the substance under different conditions. It is an essential tool in understanding the behavior of materials in various conditions and in designing chemical processes that operate efficiently under different conditions.

1. Gas Properties simulation allows you to observe the behavior of gas particles. When you put a little gas into the box using the pump, you can see that the gas particles move randomly and rapidly in all directions. They collide with each other and with the walls of the box, creating pressure. When you pump in some lighter particles, such as helium, you can observe that they move faster and more chaotically than the heavier particles. They also bounce off the walls of the box more easily than the heavier particles. Changing the temperature of the gas affects the behavior of the particles. When the temperature increases, the particles move faster and collide more frequently, creating a higher pressure. When the temperature decreases, the particles move slower and collide less frequently, creating a lower pressure.

Based on the observations, a gas can be described as a state of matter in which the particles are widely spaced, move rapidly and randomly in all directions, and are not held together by any significant forces. The gas particles have a large amount of kinetic energy and exhibit rapid motion.

2. States of Matter simulation allows you to see how well liquids and solids match the description of gas particles. When you compare the behavior of gas particles to that of liquids and solids, you can see that liquids and solids have much more ordered and restricted motion than gases. In liquids, the particles are close together and move more slowly, while in solids, the particles are tightly packed and vibrate in fixed positions.

3. The motion of particles in solids, liquids, and gases can be explained using diagrams. In a solid, the particles are packed closely together in a regular pattern and vibrate in fixed positions. In a liquid, the particles are also close together but are not in a fixed pattern and can move around each other. In a gas, the particles are widely spaced and move rapidly in all directions. To create a diagram, you can use circles to represent the particles and arrows to show their motion.

The similarities between the three states of matter include the fact that the particles that make up each state are constantly in motion. The differences lie in the level of motion and the degree of freedom of the particles. Solids have the least amount of freedom, followed by liquids, and gases have the most freedom. Liquids and solids have definite shapes and volumes, while gases have neither definite shape nor definite volume.

4. The phase diagram is a graph that shows the relationships between the different states of matter at different temperatures and pressures. It is important in structure analysis and chemical reaction as it provides information on the behavior of substances at different temperatures and pressures. The phase diagram can help to predict the behavior of a substance under different conditions and can be used to identify the different phases that exist at different points. The phase diagram is also used in industrial processes to optimize chemical reactions and to design chemical processes that operate efficiently under different conditions. Understanding the phase diagram is essential in chemistry and materials science as it provides insight into the behavior of materials under various conditions.

Therefore, 1. Pressure is created when gas particles collide with one another and the container walls while moving randomly and quickly in all directions, 2. Compared to gases, the motion of liquids and solids is more controlled and ordered 3. While liquids can move around one another and gases move quickly in all directions, solids have fixed positions, and 4. The phase diagram is crucial for predicting the behavior of substances and optimizing chemical reactions because it depicts the relationships between the states of matter at various temperatures and pressures.

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Answer:

0.705 kg less

Explanation:

Altitude at sea level = 0 ft

Altitude after climbing = 30,000 ft = 30,000 x 0.3048 = 9,144 m

Weight = W = mg

Change in weight = ΔW = (M-luggage) × (g-sea level - g-altitude)

g at sea level:

g1 = (Gravitational constant × Mass of the Earth) / (Radius of the Earth)²

g at altitude of 30,000 ft:

g2 = (Gravitational constant × Mass of the Earth) / (Radius of the Earth + Altitude)²

Gravitational constant = 6.674 × 10^-11 m^3 kg^-1 s^-2

g1 = (6.674 × 10^-11 × 5.98 × 10^24) / (6.37 × 10^6)^2

g1 ≈ 9.8358 m/s^2

g2 = (6.674 × 10^-11 × 5.98 × 10^24) / (6.37 × 10^6 + 9,144)^2

g2 ≈ 9.8076 m/s^2

ΔW = (M-luggage) × (g1 - g2)

= 25 kg × (9.8358 - 9.8076)

≈ 0.705 kg

Therefore, your luggage would weigh approximately 0.705 kg less when you climb to 30,000 ft compared to its weight at the airport.

Can't guarantee this is right, but I checked the numbers a few times and this is the best I can do!

a)

Buoyant force varies directly with the density, volume and mass of the displaced fluid. According to Archimedies principle, the buoyant force equals the weight of fluid displaced. The lead sphere has more weight than the aluminium sphere. This means that it would displace more fluid. Thus, the lead sphere experiences a greater buoyant force

b) The buoyant force is is also affected by the type of fluid. Different fluids have different densities. If the density of the object is greater than the density of the fluid, it tends to sink. Thus, the answer is Yes

The kilogram is an SI base unit that makes up part of the unit of energy, therefore the correct answer is option D

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

The base SI units are meter, kilogram, second, kelvin, ampere, candela, and mole

The unit of energy is Joules which is equivalent in mks unit as Kg m²s⁻²

Thus, The kilogram is an SI base unit that makes up part of the unit of energy, therefore the correct answer is option D

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C. Acceleration due to gravity Force = (Gravity force Constant × Concentration of first item × Mass of the object) / (Proximity seen between middle of two bodies) 2.

The universal gas law of Newton According to Isaac Newton, the gravitational pull in between two surfaces is inversely correlated with the square of their spacing and is directly related to their respective masses (m1 and m2). It goes like this: Fg=Gm1m2r2.

The strength that is applied to one thing to other is known as applied force, such as when you push on a furnishings item to move along the floor. When an item is fully stretched, tension is really the force applied, whereas forces acting is the pressure exerted by a pressed spring.

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The answer is A I Hope this answer helps you (i got the question right)

Answer:

A. As speed increases, kinetic energy increases exponentially.

Explanation:

The amount of kinetic energy an object has depends on the speed. Kinetic energy is also known as "motion energy." This being said, if speed is increasing, decreasing, or staying constant, the kinetic energy of the object will too.

Answer:

There are three main cloud types.

The foundation consists of 10 major cloud types. In addition to cirrus, stratus, cumulus, and nimbus clouds, there are cirrostratus, cirrocumulus, altostratus, altocumulus, stratocumulus, nimbostratus, and cumulonimbus clouds. The following table places these cloud types into the four major cloud groups.

Explanation:

So false, depends what you have learned and your grade level ig

Heat will flow from the metal to the water until both are at a temperature somewhere between 20°C and 300°C because of thermal equilibrium.

When there is no temperature differential between the system and its surroundings, a system is said to be in thermal equilibrium.

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The time will be the same for both horizontal and vertical component. The initial speed is 10.7 m/s

Speed is a distance travel per time taken. It is a scalar quantity and it is measured in m/s

Given that a person standing at the edge of a seaside cliff kicks a rock horizontally of the cliff from a height of 52 m and it lands a distance of 35 m from the base of the cliff.

The rock will move vertically downward with initial velocity = 0. The time taken will be constant. That is, same horizontally.

Let us first calculate the time by using the formula

h = ut + 1/2gt²

Where

Substitute all the necessary parameters into the formula

52 = 0 + 1/2 × 9.8 × t²

52 = 4.9t²

t² = 52/4.9

t² = 10.6

t = √10.6

t = 3.26 s

The speed at which the rock was initially kicked can be found by

R = Ut

35 = U × 3.26

U = 35/3.26

U = 10.7 m/s

Therefore, rock was initially kicked at a speed of 10.7 m/s

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Answer:

Every electric circuit, regardless of where it is or how large or small it is, has four basic parts: an energy source (AC or DC), a conductor (wire), an electrical load (device), and at least one controller (switch). Visualize what happens when you switch on a room light.

Explanation:

Hope this helps you

The maximum height achieved by the baseball is 20.4 m

Applying the law of conservation of mass and energy,

Initial kinetic energy(Kei) = final potential energy(KEv)

m is the  given mass, v is the given velocity, g is acceleration due to gravity and h is the maximum height achieved by the object or in this case, baseball

\(1/2mv^{2} = mgh\)

Given that height, h is

\(h = v^{2} /2g\)

The value of v is given as 20.0\(m/s\) and g can be taken as 9.8\(m/s^{2}\)

\(h = 20^{2} /2(9.8)\\h = 400/19.6\\h = 20.40816326530612\)

h ≅ 20.4

The value of h is approximately 20.4

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Answer:

Ball lift height 20 m

Explanation:

Given:

m = 0.150 kg  - Ball mass

V₀  = 20.0 m/s  - Initial ball speed

V = 0 m/s - At the top of the trajectory

g = 10 m/s² - Acceleration of gravity

______________

H - ?   - Ball lift height

According to the formula:

H = (V₀² - V²) / (2·g)

H = (20.0² - 0²) / (2·10) ≈  20 m

Answer:

The distance will be x = 1320 [m]

Explanation:

To solve this problem we must use the expression of physics that relates space to time, which is defined as speed.

v = Speed = 11 [m/s]

t = time = 120 [s]

x = distance [m]

v = x/t

x = v*t

x = 11*120

x = 1320 [m]

The symbol used for voltage is V, and the unit of measurement for voltage is also V, which stands for Volts. Therefore, the correct answer is:

Symbol: V

Unit of measurement: V (Volts)

Answer and Explanation:

The correct symbol and unit of measurement for voltage are:

Symbol: V

Unit: V (Volts)

Voltage is a measure of the electric potential difference between two points in an electrical circuit. It represents the amount of energy carried by electric charges and determines the flow of current in a circuit. The symbol "V" is used to represent voltage, and the unit of measurement is the Volt (V).

It's important to note that the other options provided are incorrect. The symbol "A" is used for current, not voltage. The symbol "R" represents resistance, and while it is related to voltage, it is not the symbol used to measure voltage. The correct unit for resistance is the Ohm (Ω).

Therefore, the correct symbol and unit of measurement for voltage are:

Symbol: V

Unit: V (Volts)

The buoyant force can be determined by subtracting the apparent weight of the object in water from its weight in air. In this case, the buoyant force would be 7N - 4N = 3N.

Based on the information provided, since the buoyant force (3N) is less than the weight of the object (7N), the object will not float.

Floating occurs when the buoyant force is greater than or equal to the weight of the object.

In this scenario, the object will experience a net downward force, indicating that it will sink rather than float in water.

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1) The force acting on the object during the time interval 0-3 seconds is 1/3 N.

2) The force acting on the object during the time interval 6-10 seconds is -0.5 N.

3) There is no time interval in which no force acts on the object.

(i) Force acting on the object in time interval 0-3 seconds. Force acting on the object is equal to the product of its mass and acceleration, i.e.,F = ma.

In the given velocity-time graph, the acceleration of the object can be determined by determining the slope of the velocity-time graph from 0 to 3 seconds.

Slope = (change in velocity) / (change in time)= (20-0) / (3-0) = 20/3 m/s^2

Acceleration, a = slope= 20/3 m/s^2

Mass of the object, m = 50 g = 0.05 kg

∴ Force acting on the object, F = ma= 0.05 × 20/3= 1/3 N.

Therefore, the force acting on the object during the time interval 0-3 seconds is 1/3 N.

(ii) Force acting on the object in time interval 6-10 seconds. Similar to the first question, the force acting on the object in time interval 6-10 seconds can be determined by determining the acceleration of the object during this time interval.

The slope of the velocity-time graph from 6 seconds to 10 seconds can be determined as follows:

Slope = (change in velocity) / (change in time)= (-20-20) / (10-6) = -40/4= -10 m/s^2 (negative sign indicates that the object is decelerating)

Mass of the object, m = 50 g = 0.05 kg

∴ Force acting on the object, F = ma= 0.05 × (-10)= -0.5 N.

Therefore, the force acting on the object during the time interval 6-10 seconds is -0.5 N.

(iii) Time interval in which no force acts on the object. There is no time interval in which no force acts on the object. This is because, as per Newton's first law of motion, an object will continue to remain in a state of rest or uniform motion along a straight line unless acted upon by an external unbalanced force.In other words, if the object is moving with a constant velocity, there must be a force acting on the object to maintain its motion.

Therefore, there is no time interval in which no force acts on the object.

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Answer:

Depends on where he was fouled

If it is beyond the 3 pt line, then it is 3

If it is within the 2 pt line, then it is 2

I hope that helps :)

Explanation:

Plz mark B R A I N L I E S T

Wavelength = speed / frequency.

Wavelength = 3x10^8 m/s / 30 hz

Wavelength = 10 million meters

1/2 wavelength = 5 million meters

(that's about 3,100 miles)

I'm pretty sure the frequency is wrong in the question.

I think it's actually 30 kHz, not 30 Hz.

That makes the antenna about 3.1 miles long.

Answer:

The decay constant, or "lambda" (λ), is the rate at which a radioactive isotope decays. It is usually measured in units of inverse time, such as seconds. In this case, the decay constant can be calculated as follows:

16:42

λ = (ln(2)/3.57 x 106) x (5.78 x 1017) = 0.

Explanation:

For a rectangular storage tank filled with paraffin to a depth of 2 m, the volume, weight, mass of paraffin, and pressure at the bottom of the tank are:

a. The volume is 24 m³.

b. weight is 240,000 N,

c. mass is 24,490 kg, and

d. pressure is 23,530 Pa.

a) The volume of paraffin in the rectangular storage tank can be calculated using the formula:

Volume = Length x Width x Depth

Given:

Length = 4 m

Width = 3 m

Depth = 2 m

Substituting the values into the formula, we have:

Volume = 4 m x 3 m x 2 m

Volume = 24 m³

Therefore, the volume of paraffin in the tank is 24 cubic meters.

b) The weight of the paraffin can be calculated using the formula:

Weight = Volume x Density x Acceleration due to gravity

The density of paraffin varies, but we can assume a typical value of 10,000 kg/m³. The acceleration due to gravity is approximately 9.8 m/s². Substituting these values into the formula:

Weight = 24 m³ x 10,000 kg/m³ x 9.8 m/s²

Weight = 240,000 N

Therefore, the weight of the paraffin in the tank is 240,000 Newtons.

c) The mass of the paraffin can be calculated using the formula:

Mass = Density x Volume

Substituting the given values:

Mass = 10,000 kg/m³ x 24 m³

Mass = 24,490 kg

Therefore, the mass of the paraffin in the tank is 24,490 kilograms.

d) The pressure at the bottom of the tank due to the paraffin can be calculated using the formula:

Pressure = Weight / Area

The area of the bottom of the tank is equal to the length multiplied by the width. Substituting the values:

Area = 4 m x 3 m

Area = 12 m²

Pressure = 240,000 N / 12 m²

Pressure = 20,000 Pa

Therefore, the pressure at the bottom of the tank due to the paraffin is 20,000 Pascals (Pa).

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The input to the power station is 5x10^9 W. This means that the power station requires an input of 5x10^9 watts to produce an electrical power output of 1.9x10^9 watts with an efficiency of 38%.

The efficiency of a power station is defined as the ratio of its output power to input power. Therefore, we can use the efficiency and the electrical power output of the power station to calculate its input power as follows:

Efficiency = Output power / Input power

Solving for input power, we get:

Input power = Output power / Efficiency

Substituting the given values, we get:

Input power = 1.9x10^9 W / 0.38

Input power = 5x10^9 W (to two significant figures)

The rest of the input power is lost as heat due to inefficiencies in the power generation process.

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Considering the definition of precision and accuracy, the mass readings of the digital balance are accurate but not precise.

Precision as the proximity between the indications or measured values ​​of the same measurand, obtained in repeated measurements, under specified conditions.

Accuracy is defined as the closeness between the measured value and the "true" value of the measurand.

In other words, accuracy is how close a measurement is to the true value, while precision is how close the values ​​of several measurements are to a point.

Precision and accuracy are independent of each other. Thus, the results in the values ​​of a measurement can be precise and not exact (and vice versa).

A set of 500-g masses is placed one at a time on a digital balance during quality control testing. The mass readings are 397 g, 401 g, and 403 g.

In this case, the measurement is accurate, since the results of each individual measurement are quite similar. But the measurements are not exact (not precise) because the results are far from the real value.

In summary, the mass readings of the digital balance are accurate but not precise.

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The letter that represents the various descriptions is as follows:

5.) Angle of incidence: B

6.) Object: D

7.) Plain mirror:A

8.) Reflection: E

9.) Angle of reflection: C

10.) Normal: F

The law of reflection in a plain mirror states that the angle of reflection is equal to the angle of incidence.

The diagram explains the law of reflection on a plain mirror because it shows the reflection of the object D as E after creating an angle of incidence B on the plane mirror surface A which is equal to the angle of reflection C.

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Answer:

(D)

Explanation:

Given :

l=3.5 m

\(A=5.26*10^{-6}\) \(m^{2}\)

\(p=1.7*10^{-8} ohm.m\)

Resistance can be calculated as :

\(R=p\frac{l}{A} \\R=1.7*10^{-8} \frac{3.5}{5.26*10^{-6} }\)

\(R=\frac{5.95*10^{-2} }{5.26} \\R=1.13*10^{-2}\)

Resistance of the wire will be 1.1×\(10^{-2}\) ohms

Option D is correct

The linear speed will be the insect be 0.5759 meter/second carried collision with the near stationary photograph.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Given that an insect lands 0.1m from the center of the turn table.

Rotational speed of the turn table = 55 rev/min

= (55×2π/60) rad/second

= 5.759 rad/second.

Hence, the speed of the insect be = Rotational speed × length

= 5.759 rad/second × 0.1 M.

= 0.5759 meter/second.

Therefore, the speed of the insect be 0.5759 meter/second.

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The speed of the cars as they stuck together is 16 m/s.

We know that the momentum after the Collison must be equal to the total momentum before the Collison and thus is what we call the principle of the conservation of linear momentum and that is what we are going to apply here so that it can help us to solve this problem at hand here.

Given that;

Momentum before Collison= Momentum after Collison

Then we have;

( 15,000 kg * 32.0 m/s) + (15,000 kg * 0 m/s) = (15,000 kg + 15,000 kg)v

v = ( 15,000 kg * 32.0 m/s) / (15,000 kg + 15,000 kg)

v = 16 m/s

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1. It is unethical for Demario to cheat

2. Demario should not engage in cheating himself

3. Demario should not turn in cheating classmates without careful consideration

4. Reporting classmates may harm relationships, create animosity, and potentially lead to severe disciplinary actions.

A virtue ethics perspective may also be useful in this circumstance. Demario should make an effort to respect moral principles like honesty, fairness, and integrity while taking the potential repercussions into account and exhibiting empathy for his fellow students.

By employing this strategy, Demario behaves responsibly, deals with the problem subtly, encourages fairness in the educational setting, and upholds his or her own moral standards.

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