When an object is placed a little farther from a concave mirror than the focal length, the image is.

Answer:

1.Magnetic Force - Used in cranes to separate metal junk from junkyards.

2.Frictional Force- Helps us to walk.

Given:

Energy = 1 kWh

Voltage = 220 Volts

Let's find the amount of electric current that must flow through the light bulb.

To find the amount of electric current, apply the formula:

Where:

P is the power in watts = 1 kWh = 1000 Watts

V is the voltage = 200 V

I is the electric current.

Rewrite the formula for I and solve:

Therefore, the amount of electric current that must flow through the light bulb is 4.5 Ampere

ANSWER:

4.5 A

Answer:

1.27seconds

Explanation:

Speed = 324 m/s , Distance = 411.48m

Time = Distance/Speed

Time = 411.48/324 seconds

Time = 1.27seconds ( Ans)

Answer:

attract the magnetic ratio engine light of rock level

Answer:

11.75 ohms

Explanation:

since its series connection

R equivalent = R1 + R2 = 7.25 + 4.5

Answer:

I believe the answer is b

Explanation:

According to the standard atmosphere, the air temperature at an altitude of 30,000 feet is 93.15 K, the air pressure is 1394.6 Pa, and the air density is 52.18 kg/m^3.

The standard atmosphere is a model of the Earth's atmosphere that describes how the temperature, pressure, and density of air change with altitude. The values for air temperature, pressure, and density at an altitude of 30,000 feet can be found in the standard atmosphere table.

The air temperature at 30,000 feet is 93.15 K, which is about -130 degrees Celsius. The air pressure at this altitude is 1394.6 Pa, which is about 1.4 psi. The air density at 30,000 feet is 52.18 kg/m^3, which is about one-tenth the density of air at sea level.

The decrease in air temperature, pressure, and density with altitude is due to the fact that there are fewer air molecules at higher altitudes. As the altitude increases, the weight of the air above decreases, and the air molecules spread out more. This results in a lower air pressure and density.

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Answer:

870 m

Explanation:

d = Vit + 1/2at²

a = ΔV/Δt = (85 m/s - 60 m/s) / (12 s) = (25 m/s) / 12 s = 2.08 m/s²

d = (60 m/s)(12 s) + 1/2 (2.08 m/s²)(12 s)² = 870 m

Answer:

The automobile traveled 870 meters during the 12 second interval.

Explanation:

We can use this kinematics equation to evaluate how far the automobile traveled.

\(\overline v=\frac{\Delta x}{\Delta t}\)

Note

\(\overline v\) is the average velocity

\(\Delta x\) is the change in position (displacement)

\(\Delta t\) is the change in time (time interval)

The formula for average velocity is

\(\overline v=\frac{V_f-V_o}{2}\)

We are given

\(V_f=85\\V_o=60\\\Delta t=12\)

First lets evaluate the average velocity.

\(\overline v=\frac{85-60}{2}\)

\(\overline v=72.5\)

Rearranging our kinematics equation to isolate \(\Delta x\) we get

\(\Delta x=\overline v \Delta t\)

Now lets evaluate \(\Delta x\).

\(\Delta x=72.5*12\\\Delta x=870\)

There are many different ways you can solve this; I could have used a different equation.

To find the airspeed and heading of the plane, we can use vector addition and trigonometry. Let's break down the motion into its components:

The wind is blowing at 55 m/s from the north. We can represent this velocity as (0 m/s, -55 m/s) in Cartesian coordinates.The pilot wants to fly the plane at an airspeed of 130 m/s 60° south of east. We need to find the components of this velocity. The east component is given by 130 m/s * cos(60°) = 65 m/s, and the south component is given by 130 m/s * sin(60°) = -112.5 m/s.Now, we can add the velocities of the wind and the plane to get the resultant velocity: Resultant velocity = (0 m/s + 65 m/s, -55 m/s - 112.5 m/s) = (65 m/s, -167.5 m/s)

The magnitude of the resultant velocity gives us the airspeed of the plane: sqrt((65 m/s)^2 + (-167.5 m/s)^2) ≈ 178.85 m/s.

To find the heading of the plane, we can use trigonometry. The angle between the resultant velocity vector and the positive x-axis is given by atan((-167.5 m/s) / 65 m/s). Calculating this angle gives us approximately -69.5°.However, since the plane is south of east, we need to subtract this angle from 90° to find the heading:

Heading = 90° - 69.5° = 20.5°.

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the primary function of a wave is to carry energy

The statement that is true is that in turbulent flow, streamlines can begin or end at any point: streamlines are perpendicular to the velocity of the fluid at every point.

At any given point of time, when the flow of water is constant with respect of time then it is called streamline flow. Streamline flow occurs when there are sharp edge obstacles in the path of a fast-moving fluid. Streamline flow is explained by Pascal's principle. In steady flow, the liquid velocity at any particular point is the same. In steady flow of water, we can consider that the two layers of water cannot meet or merge with each other and it will flow continuously without any interruption. The high viscosity index number  of any fluid describes many things about that fluid like high viscosity number describes about the rigidity of that fluid with respect to the flowing area. Streamline flow of any fluid means its smooth flow after passing through a cut edge without disturbing its path.

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Answer:

He should swim at least three times a week at the community pool to build stamina.

Explanation:

Irina should report the best estimate of the length of the room as 4.425 meters.

Irina should report the best estimate of the length of the room by calculating the average of all the measurements.

The average of the six independent measurements can be found using the formula:

Average = (Sum of measurements) / (Total number of measurements)

Therefore, the average of the six independent measurements can be calculated as follows:

Average =

(4.402 m + 4.217 m + 4.345 m + 4.925 m + 4.372 m + 4.289 m) / 6

= 26.55 / 6= 4.425 m

This is the best estimate of the length of the room because it is the average of all the independent measurements made by Irina.

In science, measurements play a vital role. Scientists use a range of tools to measure things, from simple ruler or meter stick to highly sophisticated equipment. It is crucial for the measurements to be as precise and accurate as possible because any error in the measurement can affect the results of experiments.

To minimize the error in measurement, scientists often make multiple measurements and then report the average of those measurements as the best estimate of the measurement.

This process is known as taking the average, or mean, of the measurements. In the example given above, Irina made six independent measurements of the length of the room using a meter stick. She then calculated the average of those measurements and reported it as the best estimate of the length of the room.

This method is widely used in science to minimize the error in measurement and to ensure that the results of experiments are as accurate as possible.

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If we know the frequency or wavelength of a wave, we can use this equation to calculate its speed or vice versa.

The correct relationship between the frequency of the incident radiation (ν), its wavelength (λ), and speed (c) is:

A. ν = λ/c

This equation is known as the wave equation and describes the relationship between the frequency, wavelength, and speed of a wave. It states that the frequency of a wave is inversely proportional to its wavelength and directly proportional to its speed. The speed of light (c) is a constant in a vacuum and its value is approximately 3.0 x 10^8 m/s.

Therefore, if we know the frequency or wavelength of a wave, we can use this equation to calculate its speed or vice versa.

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Answer:

When a wave crosses a boundary between two different media, such as a thin and a thick rope, its speed and wavelength change due to the difference in the properties of the two media. However, the frequency of the wave remains constant because it is determined by the source of the wave and is independent of the medium through which it travels. Since the frequency of a wave is equal to its speed divided by its wavelength (f = v/λ), if the speed of the wave changes while its frequency remains constant, its wavelength must also change to maintain this relationship.

A black hole is: (d) an object so dense that light leaving it is bent totally back to the object. A black hole is a region in space where gravity is extremely strong, and nothing, including light, can escape its gravitational pull.

Black holes are formed from the remnants of massive stars that have undergone gravitational collapse. When a star exhausts its nuclear fuel, its core collapses under its own gravity. If the core's mass exceeds a certain threshold known as the Chandrasekhar limit, the collapse continues until it forms a black hole.

The extreme density of a black hole results in a gravitational field so intense that it warps the fabric of spacetime around it. This bending of spacetime causes light and other electromagnetic radiation to follow curved paths, and if they come close enough, they can be trapped by the intense gravitational pull of the black hole, unable to escape.

Hence, light leaving a black hole is bent back toward the object, making it impossible for any light to be emitted or seen from within the event horizon, the boundary beyond which nothing can escape the black hole's gravity.

Therefore, (d) an object so dense that light leaving it is bent totally back to the object is correct answer.

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Density is a physical property calculated by dividing an object's mass by its volume. It is directly proportional to the mass and inversely proportional to its volume, meaning the denser an object is, the greater its mass and the smaller its volume.

Density is a physical property that is calculated by dividing an object's mass by its volume. The SI unit for density is kilograms per cubic meter (kg/m3) and when expressed in terms of grams per cubic centimeter (g/cm3), it is known as specific gravity or relative density. To determine density, mass and volume measurements are essential. The formula for calculating density is D=m/V, which stands for density equals mass divided by volume. The value of density is directly proportional to the mass of an object and inversely proportional to its volume, meaning that the denser an object is, the greater its mass and the smaller its volume.

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When a light ray is hit into a flat mirror the angle of incidence is equal to angle of reflection. But if the mirror is curved, this relation is not satisfied and the angle of reflection changes.

When a light ray is hot on a mirror a line that is perpendicular to the mirror's surface can be drawn at the point of incidence where the ray contacts the mirror.

A typical line is what this line is. The angle formed by the incident and reflected rays is split into two equal angles by the normal line. The angle of incidence is the angle formed by the incident beam and the normal. The angle of reflection is the angle formed by the reflected beam and the normal.

According to the law of reflection, the angle of incidence and the angle of reflection are identical whenever a light beam reflects off a surface. However, for a curved mirror these two angles will be different.

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Hi✨
also was it A?

Apparently I need twenty characters so✨

The x-component of this vector inclined from the horizontal axis is  15m.

A vector is the representation of a physical quantity in magnitude and direction.

A vector incline at an angle in has two components. On in x direction and other is in y direction.

For the given length of vector = 45.6 m and the angle of inclination from the +x axis θ = 70.8°

The x component of the given vector is

= 45.6cos 70.8°

= 14.99 m

Thus, the x- component of this vector is 15m.

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Answer: -14.99

Explanation: I had the same question and here's what I got:

Values:

A = -45.6

θ = -70.8

Ax = A cos(θ)

= 45.6cos(70.8)

Ax = -14.99 (The - signs because the vector is left)

Bonus:

How to solve the y-component of the same problem:

A = 45.6

θ = 70.8

Ax = A sin(θ)

= 45.6sin(70.8)

Ax = 43 (I am unsure why it's not negative but trust me, this is correct.)

The task is to calculate the resistivity of rainwater with a given conductivity of 100 µS/cm.

Resistivity is the inverse of conductivity and is a measure of a material's resistance to the flow of electric current. To calculate the resistivity of rainwater with a conductivity of 100 µS/cm, we can use the formula: Resistivity = 1 / Conductivity.

In this case, the given conductivity of rainwater is 100 µS/cm. By substituting this value into the formula, we can calculate the resistivity of rainwater. The resistivity will be expressed in units of ohm-cm (Ω·cm).

Resistivity is a fundamental property that characterizes the electrical behavior of a material. It represents the intrinsic resistance of the material to the flow of electric current. In the context of rainwater, the conductivity value indicates its ability to conduct electricity. By calculating the resistivity from the given conductivity, we can determine the inverse of this conductivity, which gives us a measure of the rainwater's resistance to electric current flow.

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Hi there!

We can use the work-energy theorem to solve.

Recall that:

\(\large\boxed{W = \Delta KE = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2}\)

The initial kinetic energy is 0 J because the crate begins from rest, so we can plug in the given values for mass and final velocity:

\(W = \frac{1}{2}(50)(5.61^2) = 786.8025 J\)

Now, we can define work:

\(\large\boxed{W = Fdcos\theta}}\)

Now, plug in the values:

\(786.8025 = Fdcos\theta\\\\786.8025 = (375)(3.07)cos\theta\)

Solve for theta:

\(cos\theta = .6834\\\theta = cos^{-1}(.6834) = \boxed{46.887^o}\)

Answer:

La aceleración aumentaría en un 100%

Explanation:

Según la ley de Newton, la aceleración de un objeto es directamente proporcional a la fuerza aplicada al objeto. Está dado por:

Fuerza = masa * aceleración

Supongamos que la fuerza inicial es F, la aceleración inicial es a₁, mientras que la masa inicial es m. Por eso:

F = ma₁

a₁ = F / m

Si la masa se reduce en un 50% (0,5 m) y la fuerza se mantiene constante, la aceleración es:

a₂ = F / (0.5 m)

a₂ = 2 (F / m)

a₂ = 2a₁

La aceleración aumentaría en un 100%

For the 4-volt, 0.5-watt lamp to receive the proper power, R1 should be 48 ohms.

To find the required resistance of R1, we need to use Ohm's law, which states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R), i.e., I = V/R.

First, we need to determine the current that the lamp requires. The power (P) of the lamp is given by P = IV, where I is the current flowing through it, and V is its voltage rating. We know that the power of the lamp is 0.5 watts and its voltage rating is 4 volts. Substituting these values, we get:

0.5 = I * 4

Solving for I, we get:

I = 0.5/4 = 0.125 amps

Now, we can use the current value to determine the resistance of R1 using Ohm's law. We know that the voltage drop across R1 is 6 volts (the total voltage of the battery minus the voltage of the lamp). Substituting the values of I and V into the formula, we get:

R1 = V/I = 6/0.125 = 48 ohms

Therefore, R1 should be 48 ohms to supply the correct current to the 4-volt, 0.5-watt lamp.

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Answer:

moon

Explanation:

cause yes

The frequency of a note corresponds to its pitch. The higher the frequency of a sound wave, the higher the pitch. Conversely, the lower the frequency, the lower the pitch.Notes A, B, and C can be ranked in order from highest to lowest frequency as follows:B 721 HzA 123 HzC 458 Hz

The frequency of a note is a measure of the number of cycles of vibration per second that a sound wave generates. This measurement is made in Hertz (Hz).The A note in a typical orchestra or band has a frequency of 440 Hz. In other words, when the A note is played, the sound wave created by the instrument vibrates 440 times per second, producing a tone of 440 Hz. This is considered the standard for tuning musical instruments. The rest of the notes are then tuned based on this frequency.Notes A, B, and C can be ranked in order from highest to lowest frequency as follows:B 721 HzA 123 HzC 458 Hz

The notes can be ranked from highest to lowest frequency by evaluating the Hertz (Hz) value of each note. B has the highest frequency at 721 Hz, followed by C at 458 Hz, and A has the lowest frequency at 123 Hz.

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The statement that rules of thumb are known as a non-traditional approach to setting standards is false. Rules of thumb are actually a traditional and informal method of making rough estimations or decisions.

Contrary to the statement, rules of thumb are not considered a non-traditional approach to setting standards. In fact, they have been used for centuries as a traditional and informal way to make rough estimations or decisions. Rules of thumb are practical guidelines or principles that are based on experience or common sense rather than precise measurements or formal procedures.

These rules are often used in various fields, such as engineering, construction, finance, and everyday life. They serve as quick and convenient methods to make approximate calculations or judgments when precise data or detailed analysis may not be available or necessary. For example, the "rule of thumb" that suggests spending around 30% of your income on housing expenses is a commonly used guideline in personal finance.

While rules of thumb can be helpful in certain situations, it's important to recognize their limitations. They are not meant to replace rigorous analysis or professional judgment. Depending solely on rules of thumb can lead to inaccuracies or oversimplifications. Therefore, they should be used with caution and in conjunction with more precise methods when necessary.

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Answer:

sorry, I do not know :(

Explanation:

Do not be angry!!!

Answer: In the Newton's ring experiment, the diameter of the 4th dark ring is 0.30 cm and the diameter of the 10th dark ring is 0.62 cm. We can use this information to find the diameter of the 15th dark ring and calculate the wavelength of the light.

Explanation:

In the Newton's ring experiment, the diameter of the 4th dark ring is 0.30 cm and the diameter of the 10th dark ring is 0.62 cm. We can use this information to find the diameter of the 15th dark ring and calculate the wavelength of the light.

a) To find the diameter of the 15th dark ring, we can use the formula for the diameter of the nth dark ring:

d_n = sqrt(n * λ * R)

where d_n is the diameter of the nth dark ring, n is the order of the ring, λ is the wavelength of the light, and R is the radius of curvature of the lens.

Since we want to find the diameter of the 15th dark ring, we can substitute n = 15 into the formula and solve for d_15:

d_15 = sqrt(15 * λ * R)

b) To calculate the wavelength of the light, we can use the formula:

λ = (\(d_10^2 - d_4^2\)) / (\(10^2 - 4^2\))

where d_10 is the diameter of the 10th dark ring and d_4 is the diameter of the 4th dark ring.

Substituting the given values, we have:

λ = (\(0.62^2 - 0.30^2\)) / (\(10^2 - 4^2\))

Simplifying this expression will give us the value of the wavelength of the light used in the experiment.

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