A current carrying wire is experiencing a magnetic force in a magnetic field. What happens to the direction of the magnetic force on the wire, if the current in the wire is reversed?.

To find the charge the batteries must be able to move, we need to calculate the total work done by the car's motors, which is equal to the total energy required to perform the given tasks.

We can break down the problem into three parts: accelerating the car, lifting it to the top of the hill, and maintaining a constant speed against a resistive force.

Part 1: Accelerating the car

The work done in accelerating the car from rest to a speed of 25.0 m/s is given by:

\(W1 = (1/2) * m * v^2 = (1/2) * 750 kg * (25.0 m/s)^2 = 234,375 J\)

Part 2: Lifting the car to the top of the hill

The work done in lifting the car to a height of 2.00 x 10² m against gravity is given by:

\(W2 = m * g * h = 750 kg * 9.81 m/s^2 * 2.00 x 10^2 m = 1.47 x 10^6 J\)

Part 3: Maintaining constant speed against a resistive force

The work done in maintaining a constant speed of 25.0 m/s against a resistive force of 5.00 x 10² N for an hour (3600 seconds) is given by:

\(W3 = F * d = F * v * t = 5.00 x 10^2 N * 25.0 m/s * 3600 s = 4.50 x 10^7 J\)

The total work done by the car's motors is the sum of these three parts:

\(W = W1 + W2 + W3 = 4.65 x 10^7 J\)

The charge the batteries must be able to move is equal to the total energy required, divided by the voltage of the system:

\(Q = W / V = 4.65*10^7 J / 12.0 V=3.87*10^6 C\)

Therefore, the batteries must be able to move a charge of approximately 3.87 x 10⁶ coulombs to perform the given tasks.

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Answer:

The gravitational potential energy is 150J

Explanation:

P. E=mgh

=5*10*3

Answer:

Active energy is a characteristic of Kinetic energy

Answer:

pushing or moving something best answer lol

Answer:

a force is any interaction that, when unopposed, will change the motion of an object.

A thermometer sensitive is a bulb with a thin glass wall. so, option (a) is correct.

What is thermometer?

A thermometer is a device that measures temperature. The three most used ways to measure temperature are in degrees Celsius, degrees Fahrenheit, and degrees kelvin. The metric system incorporates the Celsius scale.

What is thermometer sensitive?

The degree of change in a thermometer's thermometric property for a unit change in temperature is referred to as its sensitivity. It speaks of the smallest temperature difference that may be seen or quantified. The difference between the maximum and least temperature is referred to as a thermometer's range.

Therefore, a thermometer sensitive is a bulb with a thin glass wall. so, option (a) is correct.

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Hepatitis is a viral infection that affects the liver, and there are several types of hepatitis viruses, including A, B, C, and D. If a doctor suspects that a patient may have hepatitis, blood tests can be performed to determine which type of hepatitis the patient has.

Blood tests for hepatitis typically involve measuring the level of certain antigens and antibodies in the blood. Antigens are proteins that are recognized by the immune system as foreign substances, and antibodies are proteins produced by the immune system in response to antigens. In the case of hepatitis, the blood tests look for specific antigens and antibodies associated with each type of hepatitis virus.

Type A hepatitis is caused by the hepatitis A virus (HAV), and it is usually spread through contaminated food or water. Type B hepatitis is caused by the hepatitis B virus (HBV), and it is spread through contact with infected blood or other bodily fluids. Type C hepatitis is caused by the hepatitis C virus (HCV), and it is spread through contact with infected blood, such as through shared needles or other injection equipment. Type D hepatitis is a rare form of hepatitis that is caused by the hepatitis D virus (HDV), and it is usually spread through contact with infected blood.

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Correct Question:

Explain What happens if your doctor thinks you have hepatitis, there are blood tests to tell if you have type A, B, C, or another type called D.

When a room has mirrors on two opposite walls, an infinite series of reflections can be seen. This phenomenon can be explained by understanding how images are formed in mirrors. When an object is placed in front of a mirror, light rays from the object hit the mirror and bounce off, forming an image.

This image appears to be located behind the mirror as if there were another object present. In the case of two mirrors facing each other, the light rays bounce back and forth between the mirrors, creating an infinite series of reflections. Each reflection is a new image, appearing farther and farther away from the original object.

As the distant images are formed, the intensity of the light diminishes with each reflection. This is because some of the light is absorbed or scattered by the mirrors, resulting in a loss of energy. As a result, the distant images appear fainter compared to the original object.  when a room has mirrors on two opposite walls, an infinite series of reflections can be seen. The distant images appear fainter because of the loss of light energy through absorption and scattering by the mirrors.

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The velocity of the motorcycle is 13.9 m/s.

The Force required to stop the motorcycle is 966.6 N

The Impulse of the motorcycle is 833 kg.m/s

Velocity is the rate of change of displacement.

To calculate the velocity of the motorcycle, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

To calculate the force, we use the formula below

Where:

Given:

Substitute into equation 2

Finally, to calculate the impulse, we use the formula below

Where:

Substitute into the equation above

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The power dissipated in the 30 Ω resistor in the circuit if ig = 40 a .is 48.0 kW.

To find the power dissipated in the 30 Ω resistor, we need to use Ohm's Law and the formula for power.

Ohm's Law states that the current (I) flowing through a resistor is equal to the voltage (V) across the resistor divided by its resistance (R):

\(I=\frac{V}{R}\)

We are given the current through the circuit (Ig = 40 A), but we need to find the voltage across the 30 Ω resistor to calculate the power.

Since the voltage across the resistor can be found using Ohm's Law, we rearrange the formula as:

V = I × R

Substituting the values:

V = 40 A × 30 Ω

V = 1200 V

Now, we can calculate the power (P) dissipated in the resistor using the formula:

P = \(I^{2}\) × R

Substituting the values:

P = \(40A^{2}\) × 30 Ω

P = 48000 W

To express the answer to three significant figures, we can write it as:

P = 48.0 kW (kilowatts)

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A satellite coasting at constant speed in a circular orbit is nevertheless accelerating.

A satellite (or any mass, manufactured or natural, orbiting around another object) can do that at a constant speed by coasting around the planet. The moon or the International Space Station, a research facility 400 km above the earth's surface, are two examples of such satellites.

A satellite orbiting the Earth accelerates in a direction that is perpendicular to its center of gravity. An accelerated circular orbit around the planet is taken by a satellite. Velocity affects acceleration. There is magnitude and direction to velocity. Although the satellite is traveling at a constant pace, its direction of travel is shifting. As a result, velocity alters. The motion has accelerated if the velocity is changing.

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Complete question:

When a satellite coasts in a circular orbit at a constant speed about Earth, is it accelerating? If so, in what direction? If not, why not

Answer: It only deletes a few words

Explanation: i took the test and got it right :) hope this helps

Option B that it retells the passage in a new way is the correct answer as it cites Mary McLeod Bethune in a signal phrase here the sense of the story has been diverted and changed.

Mary Jane McLeod Bethune was an American educator, philanthropist, humanitarian, feminist, and civil rights activist whose wise works brought a significant change in mind set of some Americans towards peaceful goals.

Mary Bethune was a pro-activist when it came to spreading education se herself said that whole world changed when she learn how to read.

But but according to the given question we see that her story has been told in a different way where acting was more important for Mary Bethune than education.

Another sentence is also being refreshed in a new way the original wording of Mary Bethune were “For I am my mother's daughter, and the drums of Africa still beat in my heart".

Therefore, Option B that it retells the passage in a new way is the correct answer as it cites Mary McLeod Bethune in a signal phrase here the sense of the story has been diverted and changed.

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Answer:

Recycled answer from jaskhanna07343

Explanation:

Water does not wet waxed surfaces because the cohesive forces within the drops are stronger than the adhesive forces between the drops and the wax. Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water

Answer:

total energy

Explanation:

law of conservation of energy

Answer:

231 C final temperature, 211 C change in temperature

Explanation:

To solve this problem you you use the q=MCΔT equation, where q is heat, m is mass, c is specific heat, and ΔT is change in temperature. Since we're given heat and solving for temperature we rearrange the equation to q/(M*C)=ΔT. At this point we simply plug in the given values to get a ΔT of 211, but this is simply the change in temperature so you add the initial to this to get the final temp.

The electron configuration of an atom refers to the arrangement of electrons in the energy levels or orbitals around the nucleus. It provides information about the distribution of electrons in an atom and is based on the Aufbau principle. The electron configuration is written using a notation that includes the energy level, sublevel, and the number of electrons in that sublevel.

The electron configuration of an atom refers to the arrangement of electrons in the energy levels or orbitals around the nucleus. Electrons occupy specific energy levels or shells, and each energy level can hold a certain number of electrons. The electron configuration provides information about the distribution of electrons in an atom, including the number of electrons in each energy level and the arrangement of electrons within each level.

The electron configuration is based on the Aufbau principle, which states that electrons fill the lowest energy levels first before moving to higher energy levels. The energy levels are labeled as 1, 2, 3, and so on, with the first energy level closest to the nucleus. Each energy level can hold a specific number of electrons: the first level can hold a maximum of 2 electrons, the second level can hold a maximum of 8 electrons, the third level can hold a maximum of 18 electrons, and so on.

Within each energy level, there are sublevels or orbitals. The sublevels are labeled as s, p, d, and f. The s sublevel can hold a maximum of 2 electrons, the p sublevel can hold a maximum of 6 electrons, the d sublevel can hold a maximum of 10 electrons, and the f sublevel can hold a maximum of 14 electrons.

The electron configuration is written using a notation that includes the energy level, sublevel, and the number of electrons in that sublevel. For example, the electron configuration of carbon (atomic number 6) is 1s2 2s2 2p2. This means that carbon has 2 electrons in the 1s sublevel, 2 electrons in the 2s sublevel, and 2 electrons in the 2p sublevel.

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The electron configuration provides a systematic way to understand and predict the chemical properties and behavior of atoms, as it determines the atom's reactivity, bonding capabilities, and overall electronic structure.

The electron configuration of an atom refers to the arrangement of electrons within its atomic orbitals. Electrons occupy specific energy levels and sublevels around the nucleus of an atom, and the electron configuration describes the distribution of electrons among these orbitals. It provides information about the organization of electrons, their energy states, and their overall stability within an atom.

The electron configuration follows a set of principles and rules, including the Aufbau principle, Pauli exclusion principle, and Hund's rule. The Aufbau principle states that electrons fill the lowest energy levels first before moving to higher energy levels. The Pauli exclusion principle states that each orbital can accommodate a maximum of two electrons with opposite spins. Hund's rule states that when multiple orbitals of the same energy level are available, electrons prefer to occupy separate orbitals with parallel spins.

The electron configuration is represented using a notation that includes the principal quantum number (n), which represents the energy level, along with the letter(s) representing the sublevel (s, p, d, f) and the superscript indicating the number of electrons in that sublevel. For example, the electron configuration of carbon is 1s² 2s² 2p², indicating that carbon has two electrons in the 1s orbital, two electrons in the 2s orbital, and two electrons in the 2p orbital.

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Answer:

The mechanical advantage of a machine is always less than its velocity ratio.It is because mechanical advantage decreases due to the friction and weight of moving parts of the machine, but the velocity ratio remains constant.

Answer:

because velocity ratio dont depend upon friction whereas in case of mechanical advantage the some of the input work is affected by the friction so the value of velocity ratio is always greator than mechanical advantage.

Minimum angular separation: 0.06 degrees for 21-cm wavelength, 200-m telescope.

The minimum angular separation resolvable by a radio telescope can be determined using the formula:

θ = λ / D,

where θ is the angular separation, λ is the wavelength of the radiation, and D is the diameter of the telescope.

In this case, the wavelength (λ) is given as 21 cm, and the diameter of the telescope (D) is 200 m.

Converting the wavelength to meters:

λ = 21 cm = 0.21 m.

Substituting the values into the formula:

θ = 0.21 m / 200 m.

Calculating the result:

θ = 0.00105 radians.

To express the result in degrees, you can convert radians to degrees using the conversion factor: 1 radian = 57.3 degrees.

θ = 0.00105 radians \(*\) 57.3 degrees/radian.

θ ≈ 0.06 degrees.

Therefore, the minimum angular separation resolvable by the 200-m radio telescope for sources emitting a 21-cm wavelength is approximately 0.06 degrees.

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The magnitude of this vector is 9.43 and the direction angle of the vector is 58°.

The initial point and the terminal point of the vectors are (3 - 5) and (-2, 3) respectively.

The characteristics of the vector mainly includes the magnitude and the direction of the angle of the vector.

The magnitude of this vector will be given by,

M = √((-2-3)²+(3+5)²)

M = √(25+64)

M = √89

M = 9.43

The direction angle of this vector with the x-axis will be given by,

Tan A = (8/-5)

Tan A = -1.6

A = 58°.

The direction angle of this vector is 58 degree.

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Answer: D. The magnitude is StartRoot 89 EndRoot, and the direction angle is about 122°.

Explanation:

Answer: encountering Native Americans and Exploring land west of the Colonies

Explanation:

America was buit from people form europe who were white man who wanted power over other people

Answer:C

Explanation:

Answer:

\(ke = \frac{1}{2} mv {}^{2} \)

The equations of motion can be used to obtain the velocity as 44.7 m/s.

The equations of motion are used to solve questions that bother on kinematics. In this case, we are dealing with motion under gravity. In order to find the final velocity, we have to use the equation;

v^2 = u^2 + 2gh

Since he dropped from a height, u = 0 m/s

v^2 = 0^2 + 2 (10) (100)

v^2 = 2000

v = √2000

v = 44.7 m/s

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As the height of the hole increases, the velocity of the stream increases, results in a higher distance from the beaker. Therefore, the distance of the stream from the hole Y will be less than that from X thus, less than 5 cm is correct.

The speed of stream can be determined using the height and acceleration due to gravity g. We can use the equation for velocity using the parameters g and h.

v = √2gh

Therefore, as the height h increases, v increases.

Similarly the distance s = vt

therefore, the distance increases with v.

Here, the hole x is above the hole Y. Then the stream from X will have the greater speed and it covers greater distance (5 cm )from the beaker. Stream from Y slow compared to that in X hence covers a distance less than 5 cm. Hence, option 2 is correct.

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The direction of revolution in the plane of the Solar System was determined by the direction of rotation of the original cloud. The correct option is c.

The solar system was created from a cloud of gas and dust. According to the nebular hypothesis, the sun and planets were formed from a single rotating cloud of dust and gas. The sun was created at the center of the cloud, while the planets were created in orbit around it.

The plane of the solar system's planets is determined by the rotation of the original cloud. The original cloud that formed the solar system was spinning in a specific direction, which determined the direction of revolution in the plane of the solar system. Therefore, the answer is option c. the direction of rotation of the original cloud.

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Answer:

Force = 304.5 Newton

Explanation:

Given the following data;

Initial velocity, u = 0m/s (since it started from rest).

Final velocity, v = 42m/s

Time, t = 0.02 secs

Mass = 0.145 kg

To find the force;

First of all, we would have to determine the acceleration of the ball;

Acceleration = (v - u)/t

Acceleration = (42 - 0)/0.02

Acceleration = 42/0.02

Acceleration = 2100 m/s²

Now, we solve for the force;

Force = mass * acceleration

Force = 0.145 * 2100

Force = 304.5 Newton

To determine the distance from equilibrium when the mass moves with a speed half its initial speed, we need to consider the properties of the system, such as the mass, initial speed, and the restoring force acting on the mass.

The distance from equilibrium can be determined using the principles of simple harmonic motion. In simple harmonic motion, the displacement from equilibrium is directly proportional to the amplitude of the motion.

Given that the mass is initially moving with a certain speed, let's call it V₁. When the mass moves with half its initial speed, the new speed is V₂ = v₁/2.

In simple harmonic motion, the maximum displacement from equilibrium is equal to the amplitude of the motion. Therefore, to find the distance from equilibrium when the mass moves with a speed half its initial speed, we need to determine the amplitude of the motion.

The amplitude can be calculated using the formula A = (2πV₁) / ω, where A is the amplitude, V₁ is the initial speed, and ω is the angular frequency of the system.

Once the amplitude is determined, the distance from equilibrium when the mass moves with a speed half its initial speed is equal to half the amplitude, as the amplitude represents the maximum displacement.

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Convex lens of focal length 30cm combined with concave lens of focal length 15 cm. The combined focal length is 20 cm. The power of a lens is defined as the reciprocal of the focal length of a lens in meters which is, P = 5 D (diopters). The combination of convex and concave lenses will act like a convex lens.

To find the combined focal length, power, and nature of the combination of a convex lens of focal length 30 cm combined with a concave lens of focal length 15 cm, follow the steps below:

Combined focal length:

Use the lens formula for the convex and concave lenses and the given values.

Focal length (f) = 30 cm for the convex lens

Focal length (f) = -15 cm for the concave lens

Using the lens formula:

1/f = 1/v - 1/u

1/f = (v - u) / uv

v = focal length of the combination of lenses

u = object distance

For the combination of lenses:

u = object distance

v1 = distance from object to the concave lens

v2 = distance from the concave lens to the convex lens

v = distance from the convex lens to the image

Given:

f1 = focal length of convex lens = 30 cm

f2 = focal length of concave lens = -15 cm

v1 = -f2 = -(-15) = 15 cm

By combining the convex and concave lenses, the final image will be formed on the same side as the object. Thus, the sign convention for u and v will be positive. Therefore, using the lens formula, the value of v will be given by:

1/f = 1/v - 1/u

1/f = (v - u) / uv

v = 1/f1u + 1/f2

v = 1/30(0.5) + 1/(-15)(0.5) + 0.5

v = -6 cm

The combined focal length is the distance between the optical center and the focal point of the lens system. It is calculated as follows:

1/F = 1/f1 + 1/f2 - (d / (f1f2))

F = 20 cm (approximately)

Therefore, the combined focal length is 20 cm.

Power of the combination:

The power of a lens is defined as the reciprocal of the focal length of a lens in meters.

P = 1/f = 1/0.2

P = 5 D (diopters)

Nature of the combination:

Since the focal length of the combined lenses is positive, the combination is a convex lens. Therefore, the combination of convex and concave lenses will act like a convex lens.

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Answer:

78.34

Explanation:

1.3/30=78.3m