A toroidal solenoid has mean radius 13.0 cm and cross-sectional area 0.900 cm2How many turns does the solenoid have if its inductance is 0.140 mH ?What is the resistance of the solenoid if the wire from which it is wound has a resistance per unit length of 0.0760 Ω/m?

The answers include the following:

This is referred to as a barrier which restricts the flow of surface water and has different importance which include the generation of electricity through the wind turbines.

The dam uses the water current to move the turbines and there are some advantages which should be considered before it is constructed such as the control of flood and as a source of water supply.

Disadvantages such as local ecosystem disruption should also be considered so as to protect species and ensure that they don't go extinct.

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To identify whether a movement or sport is locomotor, non-locomotor, or a manipulative skill/movement, we need to understand what each of these terms mean.

Locomotor skills involve the movement of the whole body from one location to another. Examples of locomotor skills include walking, running, jumping, hopping, skipping, and galloping.
Non-locomotor skills involve movement of the body without changing location. Examples of non-locomotor skills include bending, twisting, swaying, turning, and stretching.
Manipulative skills involve controlling or manipulating an object with the hands, feet, or other body parts. Examples of manipulative skills include throwing, catching, kicking, striking, bouncing, and dribbling.

With this understanding, let's identify whether the movements/sports listed are locomotor, non-locomotor, or manipulative skills/movements:
1. 100 Meter Sprint - Locomotor skill
2. Equestrian - Manipulative skill
3. Shot Put - Manipulative skill
4. Jumping in Place - Non-locomotor skill
5. Climbing - Locomotor skill
6. Badminton - Manipulative skill
7. Archery - Manipulative skill
8. Swimming - Locomotor skill
9. Surfing - Locomotor skill
10. Weightlifting - Non-locomotor skill (as the movement involves lifting weights without changing location)

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The work done by the electric field in moving a -7.7 uC charge from the ground to a point +65 V higher is -500.5 μJ.

To calculate the work done by the electric field, we use the formula W = qΔV, where W is the work done, q is the charge, and ΔV is the change in potential.

Given that the charge (q) is -7.7 uC (micro coulombs) and the change in potential (ΔV) is +65 V (volts) higher, we can substitute these values into the formula: W = (-7.7 μC) × (65 V).

Calculating the product of the charge and the change in potential gives us -500.5 μJ (microjoules). The negative sign indicates that work is done against the direction of the electric field.

Therefore, the work done by the electric field in moving the -7.7 uC charge from the ground to a point +65 V higher is -500.5 μJ. This represents the energy transferred by the electric field as the charge moves through the potential difference.

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Answer:

N = N0 e^-kt          calling k the decay constant

70 = N0 e^-2 kt

35 = N0 e^-15 k

2 = e^(-2 + 15) k

.693 = 13 k

k = .0533

N0 = N e^kt

N0 = 70 e^(.0533 * 2) = 77.87

8.75 = 77.87 e^-(.0533 t)

ln .1124 = -.0533 t

t = -ln .1124 / .0533 = 41 yr

Answer: solute: sugar, coffee powder, salt, cocoa powder, liquid detergent, monosodium glutamate (vetsin).

solvent: cow's milk, water, fruit extract

Explanation:

A solution is a mixture that is made up of two or more substances including solute and solvent.

The solute is one which can be dissolved in a liquid part that is solvent. The solute can be liquid or solid. Solutes are sugar, salt, coffee powder, cocoa powder, liquid detergent, monosodium glutamate.

The solvent is one which dissolves in it solute particles or molecules. Solvent are cow's milk, water, and fruit extract.

Refraction, reflection, and total internal reflection are distinct optical phenomena. They involve the bending, bouncing, and complete reflection of light, respectively. These phenomena have practical applications and contribute to our understanding of light behavior and optical devices.

Refraction, reflection, and total internal reflection are fundamental phenomena associated with the behavior of light when it interacts with different mediums or interfaces. Let's explore each of these concepts and understand their distinctions:

1. Refraction:

Refraction refers to the bending of light as it passes from one medium to another with a different optical density. When light encounters a change in medium, its speed and direction change, causing the light ray to deviate. This deviation occurs because light travels at different speeds in different materials. The amount of bending depends on the angle of incidence and the refractive indices of the two mediums involved. Snell's law governs the mathematical relationship between the angles of incidence and refraction. Refraction is responsible for various optical phenomena, such as the bending of light in lenses and the dispersion of white light into its constituent colors in a prism.

2. Reflection:

Reflection occurs when light encounters a boundary between two mediums and bounces back into the same medium from which it originated. The angle of incidence is equal to the angle of reflection, according to the law of reflection. Reflection plays a fundamental role in our ability to see objects, as light rays reflected from surfaces enter our eyes. Mirrors and other reflective surfaces exploit the principle of reflection.

3. Total Internal Reflection:

Total internal reflection occurs when light travels from a medium with a higher refractive index to a medium with a lower refractive index, and the angle of incidence exceeds a critical angle. In such cases, instead of bending or refracting, the light is completely reflected back into the denser medium. Total internal reflection is responsible for various phenomena, including the shiny appearance of diamonds and the working of optical fibers. It enables light to propagate through the fiber by repeated internal reflections.

In conclusion, refraction, reflection, and total internal reflection are distinct optical phenomena. Refraction involves the bending of light when it transitions between different mediums, reflection refers to the bouncing back of light from a surface, and total internal reflection occurs when light is reflected back into a denser medium at an angle greater than the critical angle. These phenomena have practical applications and contribute to our understanding of light behavior and the functioning of various optical devices.

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Answer: 0-3 minutes

Explanation:

On the side of the graph, it shows you the distance the car was moving. As you know, MPH (miles per hour) shows how fast an object is moving, meaning that the car was going around 0-1 mph around minutes 0-3. Just make sure you know how to read a graph and this will become an easy question for you :)

Answer:

5-8 minutes the car isn't traveling. The g above is wrong

Explanation:

Light moves in a different path when it passes through the boundary between air and water because the two media move at different speeds. Refraction is the name for this optical distortion.

Because platform and springboard diving are done in the same pool, the country holding the Olympics must follow FINA's recommended minimum depth for 10-meter platform diving, which is five meters, or 16 feet deep.

The free diver feels 2 atm of pressure at a depth of 10 metres. Lungs slightly constrict as the free diver descends into the ocean due to increased pressure. Living in the ocean is different from living on earth because of pressure.

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Answer: The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases.

Explanation: I just did a quiz with this question

Answer:

position speed and direction

Explanation:

hope that helps =)

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Earth's magnetic field is generated in the core, which is composed of molten iron and nickel that is constantly in motion.

The Earth's magnetic field is generated in the core, which is located at the center of our planet. The core is composed of molten iron and nickel, and it is in constant motion. This motion creates a phenomenon known as the geodynamo, which generates Earth's magnetic field.

The geodynamo works through a process called convection. The intense heat from the core causes the molten iron and nickel to become buoyant, leading to a continuous circulation of the materials. This motion generates electric currents, which, in turn, produce a magnetic field. The Earth's rotation further amplifies this field, creating the complex and dynamic magnetic field we observe.

The magnetic field generated by the core extends from the Earth's interior to its surrounding space, creating a protective shield called the magnetosphere. This shield plays a crucial role in shielding the planet from harmful solar radiation and charged particles emitted by the Sun. Additionally, Earth's magnetic field enables navigation by acting as a compass for birds, animals, and even some microorganisms.

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Answer:

h = 4.905 m

Explanation:

In order to find the distance covered by the object in 1 second, we can use the second equation of motion:

\(h = v_i t + \frac{1}{2}gt^2\\\)

where,

h = distance covered = ?

vi = initial speed = 0 m/s

g = acceleration due to gravity = 9.81 m/s²

t = time = 1 s

Therefore,

\(h = (0\ m/s)(1\ s)+\frac{1}{2}(9.81\ m/s^2)(1\ s)^2\\\\\)

h = 4.905 m

Answer:

MOMENTUM= FORCE*MASS

= 140*5

= 700 kg⋅m/s

The magnitude of the net force on the chair during acceleration is 96 N.

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

Given that in the question that  a rolling desk chair of mass of 8 kg and an initial velocity of 6 m/s. The chair is given an acceleration of 12 m/s² for 3 sec then the net force on the chair during acceleration is

 F = ma

 F = \(12*8\)

 F = 96 N

The magnitude of the net force on the chair during acceleration is 96 N.

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Answer:

3.6 Km..........................................

The potential drop across the fat is approximately 0.11 V (4.5 - 4.39 V).

When a potential difference of 4.5 V is applied across a patient's arm, the potential drop across the patient's fat can be calculated using Ohm's Law.

According to Ohm's law, the potential drop (V) is equal to the product of the current (I) and the resistance (R) of the object. Therefore, V = I x RW

V = potential drop across fat

I = current

R = resistance of fat.

The potential difference applied across the patient's arm is 4.5 V. The potential difference across the arm and the fat combined is 4.5 V. The potential difference across the fat is a fraction of 4.5 V. The resistance of the arm is greater than the resistance of the fat. Therefore, a larger proportion of the potential difference is dropped across the arm.

The resistance of the fat can be assumed to be negligible compared to that of the arm. Therefore, we can consider that all the current flows through the arm. Using Ohm's law V = I x R.  

Therefore, V = 4.5 V.

The current (I) is the same across the arm and the fat. The potential drop across the arm (4.5 V) is equal to the potential drop across the arm plus the fat. V = V_ arm + V_ fat.

The resistance of the fat is negligible compared to that of the arm. Therefore, we can consider that all the current flows through the arm. I = I_ arm + I_ fat

I = V / R, where R is the total resistance of the arm and the fat.

Therefore, we can write, I = V / R_ total Substituting the value of V,  I = 4.5 / R_ total We can assume that the resistance of the arm is 50 times greater than that of the fat. Therefore,  R_ total = R_ arm + R_ fat = 50R_fat + R_ fat = 51R_fat Substituting the value of R_ total in the expression for I,  I = 4.5 / 51R_fat .

V_ arm = I x R_ arm V_ arm = (4.5 / 51R_fat) x (50R_fat) V_ arm = (4.5 / 51) x 50V_arm = 4.39 V

Therefore, the potential drop across the fat is approximately 0.11 V (4.5 - 4.39 V).

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The force of gravity depends on the mass of objects and the distance between them. This is true statement.

Physics defines force as the push or pull that modifies the velocity of a massed object.

The ability to change a body's resting or moving condition is referred to as an external force. There is a magnitude and a direction to it.

You may determine the Force using a spring balance. The SI's measure of force is the Newton.

The force of gravity between two objects is directly proportional to the mass of the object and inversely proportional to the square of the distance between them.

Hence, the force of gravity depends on the mass of objects and the distance between them. This is true statement.

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A physics professor talking produces a sound intensity level of 55 dB. The sound intensity level is a measure of the loudness of a sound.

The sound intensity level is a logarithmic measure of the ratio of the sound intensity to a reference intensity. It is expressed in decibels (dB) and provides a relative scale for comparing different sound levels. The reference intensity commonly used is the threshold of hearing, which is approximately 1 × 10⁻¹² W/m².

In this case, the physics professor's talking produces a sound intensity level of 55 dB. This indicates that the sound produced by the professor has a certain intensity compared to the threshold of hearing. The higher the sound intensity level, the louder the sound is perceived.

It's important to note that the sound intensity level is a logarithmic scale, which means that a small increase in intensity level corresponds to a significant increase in perceived loudness. For example, an increase of 10 dB represents a tenfold increase in sound intensity.

Overall, a sound intensity level of 55 dB suggests a moderate level of loudness for the physics professor's talking.

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A parallel circuit is described as a type of circuit in which there are several current paths.

A parallel circuit is a type of electrical circuit where two or more components are connected in parallel, and each component has its path for electric current flow. The path is separate from all other parts, and each has the same voltage level. The current divides among each path according to the resistance value of the components in the circuit. Parallel circuits are used in various applications, including lighting in households, street lights, and other electronic devices. In a parallel circuit, the voltage across each component is the same, and the total current in the circuit is equal to the sum of the current flowing in each branch.

A parallel circuit is used in the household and other applications to prevent other electrical devices from overloading and cutting off electrical supply, for example, when several devices are plugged into a power source. In a parallel circuit, the voltage divider circuit can be used to divide the voltage among resistors. This is because the voltage across each component in a parallel circuit is the same, and we can use the equation V = IR to calculate the voltage divider.

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Answer:

a) B = 0.0151 T

b) \( \theta = 4.737 * 10^-^6 Tm^2 \)

c) \( E = 7.896*10^-^4 \)

d) \( = 60.4 T \)

Explanation:

Given:

Diameter, d = 2.5 cm convert to meters = 0.025 m

Length, L = 30.0 cm convert to meters = 0.3 m

Number of turns, N = 300

Current, I = 12 A

a) Let's use the formula below to find the magnetic field.

\( B = \frac{u_0 N I}{L} \)

\( B = \frac{4\pi * 10^-^7 * 300 * 12}{0.3} \)

\( B = \frac{0.004524}{0.3} \)

B = 0.0151 T

b) Given a radius, r = 1.00 cm, let's convert it to meters = 0.01 m

Let's use the formula below to find magnetic flux.

\( \theta = BA \)

where \( A = \pi r^2 \)

Therefore,

\( \theta = B \pi r^2 \)

\( = 0.0151 \pi * (0.01)^2 \)

\( \theta = 4.737 * 10^-^6 Tm^2 \)

c) Given that the current in the solenoid uniformly goes from 12 A to 10 A in 0.001 seconds, the EMF generated will be:

\(E = \frac{- change in \theta}{change in t} = \frac{-u_0 N}{L} * \pi r^2 * \frac{change in I}{change in t}\)

\( E = \frac{-4\pi * 10^-^7 * 300}{0.3} * \pi *(0.01)^2 * \frac{10 - 12}{0.001} \)

\( -0.00125663 * \pi *(0.01)^2 * -2000\)

\( E = 7.896*10^-^4 \)

d) Let's use the formula:

\( \frac{u_m N I}{L} = 4000 \frac{u_0 NI}{L} \)

\( 4000 * 0.0151 \)

\( = 60.4 T \)

The focal length of eyepiece is 2.85.

It is given that astronomical telescope is designed with over magnification of 35.

The object has a focal length of 100 cm.

We need to determine the focal length of the eyepiece.

The formula to be used here is for astronomical telescope is:

\(m=\frac{f_{0} }{f_{e} }\)

Using values here, we get

\(35=\frac{100 }{f_{e} }\)

\(f_{e}=100/35=2.85\)

Hence, the focal length of eyepiece is 2.85

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This minimum value is 223.9 m.

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The attribute of motion of an item travelling a circular path is characterised as centripetal acceleration. Centripetal acceleration is defined as any item travelling in a circle with an acceleration vector pointing towards the centre of that circle.

The acceleration felt when moving in a uniform circular motion is known as centripetal acceleration. It always points toward the rotational centre. It is parallel to the linear velocity. The centripetal force is measured in an inertial frame of reference, whereas the centrifugal force is measured in a non-inertial frame of reference. Centripetal force is directed towards the axis of rotation or the centre of curvature, whereas centrifugal force is directed away from the circle's centre.

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An unbalanced force is required to accelerate an object according to Newton's Second Law of Motion.

It states that the force applied to the object is equal to the product of mass and acceleration.

\(F = ma\)

Therefore, an unbalanced force is required to accelerate an object according to Newton's Second Law of Motion.

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0.7 megohms is equal to  700,000 Ohms.So the correct option is A) 700,000 Ohms.

The prefix "mega-" means one million, so 1 megohm (MΩ) is equal to 1,000,000 ohms. Therefore, to convert from megohms to ohms, we need to multiply by 1,000,000.

0.7 megohms x 1,000,000 = 700,000 ohms

So, 0.7 megohms is equivalent to 700,000 ohms.

Alternatively, we can also use the following conversion factors:

1 MΩ = 1,000,000 Ω

To convert from megohms to ohms, we can multiply by 1,000,000:

0.7 MΩ x 1,000,000 = 700,000 Ω

Either way, we get the same answer of 700,000 ohms.

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ANSWER:

3) 1234 m

STEP-BY-STEP EXPLANATION:

Precision refers to how close two measurements are to one another. The highest number with a significant digit is the most precise, the number that has the most significant figures. Therefore, the less accurate is the opposite.

Which means that in this case, the least precise number is 1234 m.

Answer:

A pure element.

Explanation:

Calcium, being whatever weight, is a pure element.

Hope this helped! Have a good day.

Answer:

the answer is

Explanation: Calcium is a chemical element with symbol Ca and atomic number 20. Classified as an alkaline earth metal, Calcium is a solid at room temperature.

Hi there!

We can use Newton's Second Law to solve:

\(\large\boxed{\Sigma F = ma}}\)

∑F = Net force (N)

m = mass (kg)

a = acceleration (m/s²)

Rearrange the equation to solve for acceleration:

\(\large\boxed{a = \frac{F}{m}}\)

Plug in the values given to solve for the magnitude of the force.

\(a = \frac{95.4}{16} = \boxed{5.96 m/s^2 \text{ To the left}}\)

**However, if we want to assign the left direction to be NEGATIVE, then the acceleration of the cart due to a leftward net force would be -5.96 m/s².