The metal case of the stove gets hot when the fire is lit. Here is some information about the stove
Mass of metal case = 100 kg
●
Starting temperature of metal case = 20 °C
● Final temperature of metal case = 70 °C
●
Specific heat capacity of metal case = 510 J/kg °C
Calculate the energy required to raise the temperature of the metal case to 70

The speed of the water flow through the hole in the figure is 2.97 m/s.

The speed of the water flow through the hole in the figure is calculated by applying the principle of conservation of energy as shown below.

change in kinetic energy = change in potential

ΔK.E = ΔP.E

where;

¹/₂mv² - ¹/₂mu² = mgh₁ - mgh₂

where;

¹/₂m(v² -u²) = mg(h₁ -h₂)

¹/₂(v² -u²) = g(h₁ -h₂)

¹/₂(v² -0) = g(h₁ -h₂)

v² = 2g(h₁ -h₂)

v = √(2g(h₁ -h₂))

v = √(2 x 9.8(0.5 - 0.05))

v = 2.97 m/s

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Explanation:

The horsepower (hp) is a unit in the foot-pound-second ( fps ) or English system, sometimes used to express the rate at which mechanical energy is expended. It was originally defined as 550 foot-pounds per second (ft-lb/s). A power level of 1 hp is approximately equivalent to 746 watt s (W) or 0.746 kilowatt s (kW).

Answer:

Explanation:

The mass of the car can be found by using the formula

\(m = \frac{2k}{ {v}^{2} } \\ \)

From the question we have

\(m = \frac{2 \times 300000}{ {20}^{2} } = \frac{600000}{400} = \frac{6000}{4} \\ \)

We have the final answer as

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Answer:

The motion of an object can be represented by a position-time graph like Graph 1 in the Figure below. In this type of graph, the y-axis represents position relative to the starting point, and the x-axis represents time

Explanation:

Answer:

The angle of dip is called the magnetic dip.

Explanation:

It is defined as the angle which is made by the earth's magnetic field lines with the horizontal. When the component that is horizontal and the vertical component of the earth's magnetic field are equal the angle of dip is equal to 45°.

Answer: Angle of dip is also known as the magnetic dip and is defined as the angle that is made by the earth’s magnetic field lines with the horizontal.

The angle of dip varies from point to point by providing the information related to the movement of the earth’s magnetic field. The angle of dip is said to be positive when the magnetic field points downwards. When the magnetic field points upwards, the angle of dip is said to be negative.

The angle of dip is 0° when the dip needle rests horizontally while the angle of dip is 90° when the dip needle rests vertically.

When the horizontal component and the vertical component of the earth’s magnetic field are equal, the angle of dip is equal to 45°.

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Answer:

A generator is a device that converts mechanical energy into electrical energy by rotating a coil of wire in a magnetic field.

Answer:

B.) Programming and Software

Explanation:

Answer on Edge

Answer:

its B

Explanation:

Answer:

It is important to be able to separate mixtures to obtain a desired component from the mixture and to be able to better understand how each component.

Explanation:

Given:

A coil is connected to the bulb and a magnet is placed near the coil.

To find the consequence of moving the north side of the magnet towards the coil.

Explanation:

The changing magnetic field across the coil induces a current in the coil.

This is known as electromagnetic induction.

Here, the north side of the magnet moves towards the coil, this results in the change in the magnetic field across the coil.

The changing magnetic field induces a current in the coil.

As the coil is connected to the bulb, the induced current produced in the coil due to the moving magnetic field passes through the bulb.

Thus, the bulb glows.

Final Answer: The bulb glows as we move the north side of the magnet into the coil.

The work we have to do on the -oz ball to get it to that speed is 62.20 ft.lb.

1 ounce = 0.0625 pound

1 mile per hour is = 1.46667 \(\frac{ft}{sec}\)

Now, the speed of ball is =89.46687  \(\frac{ft}{sec}\)

Now, to find the weight of the ball=0.0625 ×8

weight of ball=0.5lb

The energy an object has as a result of motion is known as kinetic energy.

A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed. Kinetic energy is the type of energy that is transferred and is dependent on the mass and speed attained.

Kinetic Energy=\(\frac{1}{2} mv^{2}\)

Kinetic Energy=\(\frac{1}{2}\times0.5\times89.46687^{2}\)

Kinetic Energy=2001.082 \(\frac{ft^{2} }{sec^{2} }\times lb\)

Now, 1lbf =32.174049\(\frac{ft}{sec^{2} }\times lb\)

Now, kinetic energy=\(\frac{2001.082}{32.174049}\)

kinetic energy=62.20 ft.lb

Now, kinetic energy will always be equal to work done.

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Approximately 2.28% of students scored 90 or better on the statistics class final exam.

To determine the percentage of students who scored 90 or better on the statistics class final exam, we can use the properties of the normal distribution.

1. Calculate the z-score: The z-score represents the number of standard deviations a particular value is away from the mean. In this case, we want to find the z-score for a score of 90. The formula to calculate the z-score is:

  z = (x - μ) / σ

  where x is the score, μ is the mean, and σ is the standard deviation.

 Plugging in the values:

  z = (90 - 80) / 5

  z = 10 / 5

  z = 2

2. Look up the percentage: Once we have the z-score, we can find the corresponding percentage using a standard normal distribution table or a calculator. The percentage represents the area under the normal curve to the left of the z-score.

  From the standard normal distribution table, a z-score of 2 corresponds to a percentage of approximately 97.72%.

3. Calculate the complement: Since we are interested in the percentage of students who scored 90 or better, we need to calculate the complement of the percentage we found in the previous step. The complement represents the area under the normal curve to the right of the z-score.

Complement = 100% - 97.72%

            = 2.28%

Therefore, approximately 2.28% of students scored 90 or better on the statistics class final exam.

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The resistance of the second wire is 2R.

What is Resistance ?

The opposition to current flow in an electrical circuit is measured by resistance, also known as ohmic resistance or electrical resistance. The Greek letter omega represents the unit of measurement for resistance, known as ohms.

The barrier to current flow increases as resistance increases.

D stands for the wire's diameter, or thickness. Using RL/A, we observe that 1/4D2 D2.

The second wire's resistance is determined by

R2= R(A1/A2)(L2/L1) = R(D1/D2)^2 (L2/L1) = R(2)^2(1/2) = 2R

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Answer:

3 m/s

Explanation:

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The airline will need to have at least 167 passengers on each flight to break even.

To calculate the number of passengers needed to break even, we need to consider the total costs and the revenue generated per flight.

The total cost per flight consists of the fixed costs (£25,000) and the variable costs (£75 per passenger). The revenue per flight is determined by the ticket price (£225) multiplied by the number of passengers.

Let's denote the number of passengers as 'P'. The total cost per flight is given by:

Total Cost = Fixed Costs + (Variable Cost per Passenger * Number of Passengers)

Total Cost = £25,000 + (£75 * P)

The revenue per flight is given by:

Revenue = Ticket Price * Number of Passengers

Revenue = £225 * P

To break even, the total cost should equal the revenue:

£25,000 + (£75 * P) = £225 * P

Now, we can solve this equation for P to find the number of passengers needed to break even:

£25,000 + (£75 * P) = £225 * P

£25,000 = £225 * P - £75 * P

£25,000 = £150 * P

P = £25,000 / £150

P ≈ 166.67

Since the number of passengers must be a whole number, we round up to the nearest whole number:

P = 167

The airline will need at least 167 passengers on each flight to break even. However, since the maximum capacity of the aircraft is 200 passengers, the airline will need to fill the aircraft to its maximum capacity to break even on each flight.

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A) water medium is usually used for determining the refractive index.

In physics, refraction is the direction change brought on by a wave's speed change as it travels through a medium. For instance, waves move more quickly in deep water than they do in shallow.

The most often investigated characteristic in the forensic analysis of glass pieces is refractive index since it is easily evaluated on the minuscule shards typically found in casework.

Glass is the ideal real-world illustration of light refraction. A glass jar will make an object appear smaller and a little elevated when viewed through it. The text on a piece of paper or a document will appear closer to the surface if a slab of glass is placed over it due to the different angle the light is bending at.

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The complete question is:

Forensic scientists immerse glass evidence into a medium to determine its refractive index. Which medium is usually used for determining the

refractive index?

A. water

B. Air

C. Gel

D. Oil

Answer:

No,unless the force is balanced and the object doesn't move .

Answer:

Materials that are known as permanent magnets consist of magnetic domains, where electrons are aligned in pairs within atoms. Magnetism is weakened as a result of damage to this alignment caused by heat and electromagnetic fields.

Explanation:

Answer:

A film transition is a technique used in the post-production process of film editing and video editing by which scenes or shots are combined. Most commonly this is through a normal cut to the next shot. Most films will also include selective use of other transitions, usually to convey a tone or mood, suggest the passage of time, or separate parts of the story. These other transitions may include dissolves, L cuts, fades (usually to black), match cuts, and wipes.

Explanation:

The minimum bandwidth of the channel that this signal can transmit be at least is 16 MHz.

We know that the signal with a bandwidth of 15 MHz is first passed through a low filter with a cut-off frequency of 8 MHz. After that, the signal is sampled using the minimum sampling frequency required and each sample is coded with 10 bits. The minimum signal to noise ratio is used to make the efficiency of this communication channel 10 bit /s /Hz. We have to determine the minimum bandwidth of the channel that this signal can transmit be at least.

Therefore, the minimum bandwidth of the channel that this signal can transmit be at least is 16 MHz.

What is sampling rate?

Sampling rate is the rate at which the amplitude of a continuous signal is measured, in order to digitally encode it. The number of samples taken per second is known as the sampling rate. The sampling rate is measured in samples per second, and it is frequently referred to as the sampling frequency of the signal.

What is bandwidth?

Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies. In signal processing and telecommunications, bandwidth refers to the range of frequencies that a signal can transmit. The term bandwidth refers to the total frequency range that a signal can transmit and is frequently used in the context of wireless communications and computer networking.

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Answer: mass

The mass of a person is constant, weight is a force that is influenced by gravity.

The universe has four different types of galaxies: elliptical, spiral, barred spiral, and irregular. Although there are other sorts of galaxies besides these, which are the four primary categories, they are all categorized according to their shapes.

A galaxy's shape is a result of a combination of the gravitational pull of the gas clouds' internal gravity and the spinning gas cloud's centrifugal force. Because of the spinning gas cloud's centrifugal force, all galaxies were born with an elliptical form.

Due to the fact that galaxies rotate around a central axis and due to a phenomenon known as "density waves," astronomers think that galaxies have spiral arms. Galactic density waves are comparable to ocean waves. In a pond, the water doesn't actually move; instead, wave energy moves and changes the water as it passes.

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Answer:

14      m/s^2

Explanation:

Acceleration =  Δv /  Δt   = 27 m/s / 1.9s = 14    m/s^2

Answer:

C

Explanation:

During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom.

Answer:

I do have the answer

Explanation:

You are standing 1 meter away from a convex mirror in a carnival fun house. then standing upright but smaller than your actual height. Hence option A is correct.

In a convex mirror, the image is virtual and the reflection appears smaller than the real object. Convex mirrors provide a more compact, upright picture of the item by having an outwardly curving reflecting surface that causes light rays to diverge or spread out.

Convex mirrors are curved mirrors with reflecting surfaces that protrude in the direction of the light source. This protruding surface does not serve as a light focus; rather, it reflects light outward. As the focal point (F) and the centre of curvature (2F) are fictitious points in the mirror that cannot be reached, these mirrors create a virtual image. As a result, pictures are created that can only be seen in the mirror and cannot be projected onto a screen. When viewed from a distance, the image is smaller than the thing, but as it approaches the mirror, it becomes larger.

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Solutions for the following equations are as follows:

1. \(Yi ≤ 424 ∀ i$X_3+X_7 ≤ 1$\)

2.    \($∑_{i=1}^{7} X_i ≥ 3$\).

3. \($X_3 + X_7 ≤ 1$\)

4. \($X_6 ≥ X_4 + X_5 - 1$\)

1. Mixed-integer linear optimization model to find the minimum cost plan:

Let X be a binary decision variable, indicating whether each power plant is on or off. Then, we can use the following mathematical formulation for the problem:

minimize \($∑_{i=1}^{7} s_i X_i +∑_{i=1}^{7} c_i Y_i$\)

Subject to:

\($∑_{i=1}^{7} l_i X_i ≤ 424$\)

\(∑_{i=1}^{7} u_i X_i ≥ 424$\)

\(X_i$ ∈ {0,1} ∀ i$\)

\(Y_4+Y_5-2Y_6 ≤ 0$\)

\(Yi ≤ 424 ∀ i$X_3+X_7 ≤ 1$\)

2. Adding a Linear Constraint:

At least three plants should be turned on, which means we want\($∑_{i=1}^{7} X_i ≥ 3$\).

3. Adding a Linear Constraint:

Plant 3 and 7 can not be both turned on. This implies the linear constraint:\($X_3 + X_7 ≤ 1$\).

4. Adding a Linear Constraint:

When plants 4 and 5 are on, then plant 6 must also be on. This implies the linear constraint:\($X_6 ≥ X_4 + X_5 - 1$\).

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