The drawing shows two identical airplanes at an air show. The airplanes are flying at the same speed. Airplane W is flying 50 m higher than airplane X. Which statement best describes the energy of the two airplanes?

Exponential graph , constant acceleration

We graphed the points and joined each one to form the function.

Answer:

Explanation:

try the fourth one :)

The definition of electric field lines states that these are lines of constant potential, that is, each line has a value of electric potential.

If two different lines would cross, that means there would be a point in space with two values of potential, which is impossible.

Therefore the statement that these lines never cross is TRUE.

Answer:

Answer:

false

Explanation:

The electrical force is much weaker than the force of gravity. False. Thomas Edison argued that our electrical system should use direct current because he felt that alternating current was dangerous.

Answer:

False

Explanation:

electrical force is billions and trillions and trillions times stronger than gravity. Gravity is a weak force compared to electrical force.

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A 1 kg item falls 2.50 m from the table's base.

a) By the conservation of momentum, we have:m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'where m₁ = 0.5 kg, m₂ = 1 kg, v₁ = √(2gh) = √(29.812.5) = 7.85 m/s (where h = 2.5 m is the height of the track), v₂ = 0, and v₁' and v₂' are the velocities of the 0.5 kg block and 1 kg object, respectively, after the collision.

Solving for v₁' and v₂', we get:v₁' = (m₁ - m₂)/(m₁ + m₂) * v₁ = -1.95 m/s v₂' = 2m₁/(m₁ + m₂) * v₁ = 3.90 m/s. So the 0.5 kg block moves backwards with a velocity of 1.95 m/s, and the 1 kg object moves forward with a velocity of 3.90 m/s.

b) The maximum height reached by the 0.5 kg block can be found using conservation of mechanical energy.

At the top of the track, the block has potential energy mgh, which is converted entirely into kinetic energy just before the collision. After the collision, the block travels up the track again until it comes to rest at some maximum height \(h_m_a_x\). At this point, it has kinetic energy of 1/2 m₁v₁'². Setting these equal, we get:mgh = 1/2 m₁v₁'² Solving for h, we get:

\(h_m_a_x\) = v₁'²/(2g) = (1.95 m/s)²/(2*9.81 m/s²) = 0.190 m.

So the 0.5 kg block travels back up the track to a height of 0.190 m after the collision.

c) To find the horizontal distance the 1 kg object travels before landing on the table, we can use the time it takes to fall from a height of 2 m. This can be found using the equation h = 1/2 gt², where h = 2 m and g = 9.81 m/s². Solving for t, we get :t = √(2h/g) = √(2*2/9.81) = 0.64 s During this time, the object travels a horizontal distance of d = vt , where v = v₂' = 3.90 m/s.

Therefore :d = vt = (3.90 m/s)(0.64 s) = 2.50 m. So the 1 kg object lands 2.50 m away from the bottom of the table.

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Answer:

c

Explanation:

efficiency is measured in % hence 0.02% is smaller than 20%

A cell of inter resistance of 0.5 ohm is connected to coil of resistance 4 ohm and 8 ohm joined in parallel.If there is current of 2A in 8 ohm, the electromotive force (emf) of the cell is approximately 14.5 volts.

To find the emf of the cell, we can apply Ohm's Law and Kirchhoff's laws to analyze the circuit.

Given:

Resistance of the coil, R1 = 4 ohm

Resistance of the other resistor, R2 = 8 ohm

Current passing through the 8-ohm resistor, I = 2A

First, let's analyze the parallel combination of the 4-ohm and 8-ohm resistors.

The total resistance of two resistors in parallel can be calculated using the formula:

1/Rp = 1/R1 + 1/R2

Substituting the given values, we have:

1/Rp = 1/4 + 1/8

1/Rp = 2/8 + 1/8

1/Rp = 3/8

Rp = 8/3 ohm

Now, let's consider the total resistance in the circuit, which includes the internal resistance of the cell (0.5 ohm) and the parallel combination of the resistors (8/3 ohm).

R_total = R_internal + Rp

R_total = 0.5 + 8/3

R_total = 1.833 ohm

Now, we can find the emf of the cell using Ohm's Law:

emf = I * R_total

emf = 2 * 1.833

emf ≈ 3.667 volts

Therefore, the emf of the cell is approximately 3.667 volts.

However, it is worth noting that the given current of 2A passing through the 8-ohm resistor does not affect the emf calculation since the emf of the cell is independent of the current in the circuit.

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The measure of arc CD (round to the nearest degree) is 150 degress

The following data were obtained from the question:

Length of arc = 2πr × (θ / 360)

Inputting the given parameters, we can obtain the measure of arc CD as follow:

1.31 = (2 × 3.14 × 0.5) × (θ / 360)

1.31 = (3.14 × θ) / 360

Cross multiply

3.14 × θ = 1.31 × 360

3.14 × θ = 471.6

Divide both sides by 3.14

θ = 471.6 / 3.14

θ = 150 °

Thus, we can conclude that the measure of arc CD is 150 °

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Complete question:

See attached photo

Answer:

s = 2250 m = 2.25 km

Explanation:

First we need to find the time traveled by the friend. So, we use:

s₁ = v₁ t₁

where,

s₁ = distance traveled by friend = 630 m

v₁ =  speed of friend = 2.1 m/s

t₁ = time taken by friend = ?

Therefore,

630 m = (2.1 m/s)(t₁)

t₁ = 300 s

Since, you traveled 10 mintes = 600 s more than the friend. Hence,

s₂ = v₂ t₂

where,

s₂ = distance traveled by friend = ?

v₂ =  speed of you = 1.8 m/s

t₂ = time taken by you = 300 s + 600 s = 900 s

Therefore,

s₂ = (1.8 m/s)(900 s)

s₂ = 1620 m

Now, the total distance between house will be:

s = s₁ + s₂ = 630 m + 1620 m

s = 2250 m = 2.25 km

Answer:

The mass of the cement is 15,000 kg.

Explanation:

To evaluate the mass we can use this equation

\(\sf m=dv\)

Where

\(\sf m\) is the mass

\(\sf d\) is the density

\(\sf v\) is the volume

Numerical Evaluation

In this example we are given

\(\sf d=3000\)

\(\sf v=5\)

Substituting our given values into the equation yields

\(\sf m=3000 \cdot 5\)

\(\sf m=15000\) kg

The answer is true, that the hydraulic press utilizes Bernoulli's principle.

It can be derived from the Principle of conservation of energy.

According to Bernoulli's principle, which governs fluid dynamics, a fluid's speed increases concurrently with a reduction in pressure or potential energy. The mathematical concept is named after Swiss mathematician Daniel Bernoulli, who first published it in his book Hydrodynamics in 1738.

The venturi tube is a real-world example of Bernoulli's Principle in action. The venturi tube has an air intake that constricts to a throat and an exit segment that widens as it moves backward. The entrance and outflow both have the same diameter.

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Answer:

Hello there seems to be no Images in this question but Kinetic energy is a push or a pull force which has to do with motion if you just need to know what t is. Next time be sure to add the pictures for it.

Explanation:

Thank you!

Hello the other person (#Sonichj123), was indeed correct there appears to be no picture in your question. Although there is no picture in your question, If you have another question I will be gladly to help you!

Explanation:

Thank you so much! (≥ФωФ≤)

The time it takes the stone to fall from a height of 7.11 m is 1.2 seconds.

Time can be defined as an ongoing and continuous sequence of events that occur in succession, from past through the present, and to the future.

To calculate the time it takes the stone to drop from an height of 7.11 m, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for t.

Hence, the time it takes the stone to fall is 1.2 seconds.

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D. The input rating of the furnace is determined as 100,000 BTU.

Input power rating means the power, expressed in Watts or one of its multiples, for which the energy storage unit has been designed to operate at nominal conditions.

eff = (output rating / input rating) x 100%

80/100 = 80,000 BTU / input rating

0.8 = 80,000 BTU / input rating

input rating = 80,000 BTU/0.8

input rating = 100,000 BTU

Thus, the input rating of the furnace is determined as 100,000 BTU.

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Approximately 0.123 kg of liquid water at 26 degrees Celsius would be needed to melt 41 grams of ice.

To calculate the minimum amount of liquid water required to melt 41 grams of ice at 0°C, we need to consider the energy required for the phase change from solid to liquid, which is known as the specific heat of fusion of ice.

The energy required to melt 1 kg of ice is 3.33×105 J/kg.

Therefore, the energy required to melt 41 grams of ice is (3.33×105 J/kg) × (41/1000) kg = 13653 J.

To calculate the amount of liquid water required, we use the specific heat capacity of water, which is 4180 J/kg/°C.

Assuming the initial temperature of water is 26°C, the amount of water needed can be calculated as (13653 J) ÷ (4180 J/kg/°C) ÷ (26°C) = 0.123 kg or approximately 123 ml of water.

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In the given configuration we have a magnet and a loop} of wire connected to a light bulb.

The magnet produces a constant magnetic field which is represented by the field lines.

When the magnet poles are flipped the magnetic field changes accordingly. Now, we need to consider Faraday's law or the Law of Induction. This means that when there is a changing magnetic field in a loop, an electromagnetic force will be induced inside the loop. This electromagnetic force will generate a current that in turn will turn the light bulb on.

Therefore, by flipping the magnet inside the loop the light bulb will turn on.

Answer:

Cost = 165.6 cents = $1.656

Explanation:

First, we will calculate the total energy consumed by the bulb in a month:

\(E=Pt\\\)

where,

E = Energy Consumed = ?

P = power = 23 W

t = time = (1 month)(30 days/1 month)(24 h/1 day) = 720 h

Therefore,

\(E = (23\ W)(720\ h)\\E = 16560\ Wh = 16.56\ Kilowatt-hour\)

Now, the cost will be:

\(Cost = P(Unit\ Cost)\\Cost = (16.56\ kilowatt-hour)(10\ cents/kilowatt-hour)\)

Cost = 165.6 cents = $1.656

The velocity of car 2, from the frame of reference of car 1, is 20 m/s west. (Answer: B)

When considering the frame of reference of car 1, we need to subtract the velocity of car 1 from the velocity of car 2 to determine the relative velocity. Since car 1 is moving at 45 m/s west and car 2 is moving at 25 m/s east, we can subtract these velocities to find the relative velocity of car 2 with respect to car 1.

45 m/s (west) - 25 m/s (east) = 20 m/s (west)

Therefore, car 2 has a velocity of 20 m/s west when observed from the frame of reference of car 1. It is important to note that velocities are vector quantities, which means they have both magnitude and direction. In this case, the direction is west because car 2 is moving in the opposite direction of car 1. (Answer: B)

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Answer:

  C)  There will be no change in the balance

Explanation:

Before and after the cork is placed, the masses in each pan are the same. There will be no change in the balance.

The diver is swimming to a distance of 220 m in a direction of 12 degree. Here, the magnitude of his displacement is 220 m and the direction is 12 degrees.

Displacement of an object describes how far it is from a starting point at which it was stationary. The long term displacement is called distance. Displacement is a vector quantity and having magnitude and direction.

All vector quantities have both magnitude and direction. Force, velocity, acceleration , work done etc are vector quantities.

The displacement of the swimmer is given here. Where his magnitude is 220 m and the direction is 12°. Thus, the two components given are magnitude and direction of displacement.

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a. There are two main types of pluralism: cultural and political

b. Yes, the United States is becoming more pluralistic

c. Ethnic enclaves can be both a positive and negative aspect of pluralism in the US.

a. Pluralism refers to the coexistence of multiple cultures, religions, and ethnicities within a society. There are two main types of pluralism: cultural and political. Cultural pluralism emphasizes the preservation of distinct cultural traditions, while political pluralism emphasizes the equal representation of different groups within the political system.

Cultural pluralism is often associated with the idea of multiculturalism, which recognizes and celebrates the diversity of different cultures. This type of pluralism acknowledges the importance of cultural differences and encourages individuals to maintain and express their cultural identities. In contrast, political pluralism emphasizes the importance of equal representation of different groups within the political system. This can take the form of proportional representation in government or equal access to political power for different groups.

b. The United States is becoming more pluralistic, as the population becomes more diverse and the importance of multiculturalism and political pluralism is increasingly recognized. The country is home to many different ethnic and cultural groups, and these groups are increasingly visible in politics and society. This is evident in the increasing number of ethnic and cultural enclaves, which are areas where different ethnic groups live in close proximity to one another.

c. Ethnic enclaves can be both a positive and negative aspect of pluralism in the US. On the one hand, they allow individuals to maintain their cultural traditions and create supportive communities. On the other hand, they can also lead to segregation and exclusion, as different groups may be reluctant to interact with one another. In order to promote a positive form of pluralism, it is important to encourage interaction and understanding between different groups, while also respecting and celebrating their distinct cultural identities.

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Speed is defined as a change in position over time. Position's derivative is velocity, and velocity's derivative is acceleration.

                             S = d/t

                               v = v 0 + a t

                          v = s/t

                      a = (v - v0) / t = Δv / t

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Answer:

A. The amount of mass changes only slightly during a chemical

reaction.

The head loss doubles when the average velocity is doubled.

The vector quantity velocity (v), denoted by equation v = s/t, quantifies dislocation (or shift in position, s), over change in time (t).

Velocity is the pace and direction of the an object's movement, whereas speed is the timekeeping at which an object is travelling along a path.In other words, velocity is a vector, whereas speed is indeed a scalar value.

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Answer:

A) V_rms = 29 V

B) Vav = 0 V

Explanation:

A) We are told that;

V = V_o cos ωt

voltage amplitude; V = V_o = 41.0V

Now, the formula for the root-mean-square potential difference Vrms is given as;

V_rms = V/√2

Thus plugging in relevant values, we have;

V_rms = 41/√2

V_rms = 29 V

B) Due to the fact that the voltage is sinusoidal from the given V = V_o cos ωt, we can say that the average potential difference Vav between the two terminals of the power supply would be zero.

Thus; Vav = 0 V

A. The root-mean-square potential difference (\(V_{rms}\)) is equal to 28.99 Volts.

B. For this voltage with a sinusoidal waveform (sine wave), the average potential difference (\(V_{ave}\)) between the two terminals of the power supply is equal to zero (0).

Given the following data:

The voltage across the terminals of an alternating current (AC) power supply varies directly with time according to the equation:

\(V_0 = V_0cos(t)\)

A. To find the root-mean-square potential difference (\(V_{rms}\)):

Mathematically, root-mean-square for voltage in an alternating current (AC) power supply (circuit) is given by the formula:

\(V_{rms} = \frac{V}{\sqrt{2} }\)

Substituting the given parameter into the formula, we have;

\(V_{rms} = \frac{41}{\sqrt{2} }\\\\V_{rms} = \frac{41}{1.4142 }\\\\V_{rms} = 28.99\; Volts\)

B. To find the average potential difference (\(V_{ave}\)) between the two terminals of the power supply:

For this voltage with a sinusoidal waveform (sine wave), the average potential difference (\(V_{ave}\)) between the two terminals of the power supply is equal to zero (0).

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The function is not continuous at x=1, so the answer is A.

At x=1, the two pieces of the function meet. The first piece ends with an open dot at (1,0), meaning that the function is not defined at $x=1$. The second piece starts with a closed dot at (1,-1), meaning that the function is defined at x=1 and takes the value -1 there.

Since the function is not defined at x=1, it cannot be continuous at that point. Therefore, the function is not continuous overall.