in exercises 25–30, express each vector as a product of its length and direction. 2i j−2k 9i−2j 6k 5k 35i 45k 16i−16j−16k

The correct answer is 1.575 A.

a)

From Transformer turns ration

N_s/N_p =V_s/V_p

=>N_p =N_s × (V_p/V_s) =100 × (1.6 × 10^4/120)

N_P=1.33 × 10^4 Turns

b)

P_out =P_in

V_sI_s =V_PI_P

210 × 120 =(1.6 × 10^4)I_p

I_p=1.575 A

What is the working principle of an electric generator?

The generator is composed of a coil with many copper wires coiled around an iron core that is rectangular in shape. The armature is the term for this coil. This armature's purpose is to boost the magnetic flux. The armature revolves between two powerful permanent magnets that have been set. Here, the magnetic lines that are created are orthogonal to the axis of the armature. Two slip rings are further attached to the armature's arms. Two metallic brushes are also linked to the slip rings, which aid in moving current from the armature to the slip rings. These rings are employed for creating moveable contact. Last but not least, the current flows via a load resistance that is wired in parallel with and across the two slip rings.

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The direction of the electric fields will be outwards or away from the the carbon nucle.

 Define initial magnitude of the acceleration ?

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Answer:

Newton's second law states that force is directly proportional to the product of mass and acceleration.

so if you hit a baseball with a bat it will accelerate according to the applied force.

Here's the Answer :

=》A) It will move towards the weaker force.

because, the stronger force will overcome the weaker one and hence make the object move towards the other side.

When a stone is propelled vertically off the ground its kinetic energy decreases and gravitational potential energy increases.

When an object is propelled upwards at first it have the highest kinetic energy. The total energy will be equal to kinetic energy and potential energy will be 0. When it reaches midway through the air, the kinetic energy gradually decreases and potential energy increases, because some of the kinetic energy is converted to gravitational potential energy.

When the object reaches the maximum height, the Kinetic energy will become 0, and object stops moving forward. Here all the kinetic energy i converted to gravitational potential energy. Potential energy will be maximum at this point. After this the object begins to fall attaining some kinetic energy.

So when an object is thrown vertically upwards, the kinetic energy decreases and gravitational energy increases. The total energy will remain constant throughout.

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Technology is the universe of tools, means, and methods through which we interact with our environment. [TRUE]

Apart from being divided into several types, technology will then provide many benefits in all fields.

1. Easy to receive information

The first positive side of technological development is the ease of receiving information, both locally and internationally. Unlike in the past, in this modern era, we don't have to bother buying newspapers.

2. Easy to communicate

With the messaging application that can send messages, both voice messages and text messages as well as telephone, which will then make it easier to communicate. Unlike the past, communication still has to be through letters and you have to send it to the post office. This letter cannot directly reach the recipient of the letter. It also requires quite expensive costs and takes a long time.

3. More Practical Shopping

In the past we had to go to the market or other shopping places and it took a long time. It's different from now, you can simply order various needs just by using an online shopping application. Then pay for it and wait for the order to arrive at home without the hassle of leaving the house.

4. Learning becomes easier

In the past we had to buy thick books and cost a lot. Right now you only need to buy ebooks, although not a few are paid, but there are many e-books that you can get for free. Besides being able to read books easily, the rapid development of technology will then facilitate the teaching and learning process. Especially during a pandemic like this. The benefits of this technological development are also very necessary for students and teachers who teach.

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Answer:

V = 2.86 m/s

Explanation:

Given:

m = 1400 kg

p = 4000 kg·m/s

_________________

V- ?

Momentum:

p = m·V

Velocity:

V = p / m

V = 4000 / 1400 ≈ 2.86 m/s

Answer:

dang, you are really trying to get everyone to do your heavy lifting lol.

I'll do coal. and maybe a little more.

Explanation:

Coal What is it?

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen.

Coal How we obtain it:

Coal can be extracted from the earth either by surface mining or underground mining. Once coal has been extracted, it can be used directly (for heating and industrial processes) or to fuel power plants for electricity. If coal is less than 61 meters (200 feet) underground, it can be extracted through surface mining.

Coal Pros:

Coal is plentiful in many places and it is easy to access through mining, so people rely on it to produce energy. Coal is easy to store. Once it is mined it can be safely stored with no hazard of fire or explosion like there is with gas or oil. It is relatively easy and inexpensive to convert coal into energy.

Coal Cons:

Coal is nonrenewable.  Coal contains the most CO2 per BTU, the largest contributor to global warming.  Severe environmental, social, and health, and safety impacts of coal mining.  The devastation of the environment around coal mines is heavy.  High cost of transporting coal to centralized power plants. Coal is really dirty and not good.

__________________________________________________________

Solar What is it?

Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.

Solar How we obtain it:

Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.

Solar Pros:

It's clean energy. Solar power is pollution-free and causes no greenhouse gases to be emitted after installation.  It has reduced dependence on foreign oil and fossil fuels.  It is renewable clean power that is available every day of the year, even cloudy days produce some power.  It gives a return on investment unlike paying for utility bills.

Solar Cons:

Solar doesn't work at night. Solar panels are not attractive. You can't install a home solar system yourself. My roof isn't right for solar. Solar hurts the environment. Not all solar panels are high quality.

Answer:

P waves, or Primary waves, are the first waves to arrive at a seismograph. P waves are the fastest seismic waves and can move through solid and liquids

Explanation:

By the newtons Second Law:

F = ma

Solving for m:

m = F / a

m =  100 N / 2 m/s²

Force is mass multiplied by acceleration. Then mass of a moving body can be found from the force and acceleration. The mass of the girls skating with a rate of 2 m/s² is 50 kg.

Force is an external agent acts on a massive body to change it from a state of rest or motion. There are different types of forces such as gravitational force, nuclear force, magnetic force etc.

According to Newton's second law of motion force is the product of mass and acceleration in a moving body. Let F be the force, m be the mass and a is the acceleration, then the force equation is written as:

F = ma .

Thus force is directly proportional to the mass and acceleration. Given that the acceleration of the skating girl is 2 m/s² and the force acting on her is 100 N. Thus mass is calculated as follows:

Mass = force / acceleration

        = 100 N / 2 m/s²

        = 50 Kg.

Therefore, the mass of the skating girl with an acceleration of 2 m/s² and 100 N force is 50 kg.

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To calculate the initial speed of the ball, you can use the equation v = s/t, where v is the velocity of the ball, s is the distance the ball traveled, and t is the time it took for the ball to travel that distance.

In this case, the ball traveled a distance of 9.8 meters (the height of the ball when first thrown, plus the height of the ball when it was caught) in 5 seconds, so the initial velocity of the ball would be 9.8 meters/5 seconds, or 1.96 m/s.

Initial speed is the speed of an object at a specific point in time. It is typically represented by the letter 'u' or 'v'. For example, if an object is thrown with an initial speed of 30 m/s, its speed at time t = 0 is 30 m/s.

Initial speed can also be used to calculate the average speed of an object over a period of time. For example, if an object moves at a speed of 10 m/s for 5 seconds and then has a speed of 20 m/s for another 5 seconds, its average speed over the 10 second period is 15 m/s.

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Answer:

His average speed is 1.5 meters per second.

Explanation:

Given:

Distance = 90 meters

Time = 1 minute = 60 seconds

equation...

Average Speed = Total Distance / Total Time

so...

Average Speed = 90 meters / 60 seconds

then the answer would be...

Average Speed = 1.5 meters per second

The given amplifier circuit is a common-source amplifier. The equivalent circuit diagram of the amplifier includes a MOSFET N5486 transistor. We can determine the drain current (ID) and drain-source voltage (VDS) using the following equations:

1. Voltage at the source terminal (VS) is calculated using Ohm's law: VS = IS x RS.2. The drain current (ID) can be calculated using the equation ID = IS (1 + GVin), where Vin is the input voltage, G is the voltage gain, and IS is the current flowing through RD.Let's calculate the values of ID and VDS:

Given:- IS = VDD / RD = 10V / 10Ω = 1A- Vin = -1V / (1.5 x 10^6Ω + 0.47μF) = -0.6666667μA (using voltage divider rule)- G = -RD / RS = -10Ω / 3kΩ = -0.003333 Calculating ID:ID = 1A (1 - 0.003333 x 0.6666667 x 10^6)≈ 0.997A = 997mACalculating VDS:VDS = VDD - IDRD= 10V - 997mA x 10Ω≈ 10V - 9.97V≈ 0.03VTherefore, the values of ID and VDS are approximately ID = 997mA and VDS ≈ 0.03V, respectively.

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Answer:

12.39m/s²

Explanation:

use the formula a=v-u

t

Answer:

Mars

Explanation:

It would be Mars because Mars has the least mass out of al the planets in the Solar System, and that would affect its gravitational pull.

I hope it helps! Have a great day!

Anygays-

A) The image is formed at a distance of 0.109m from the focal-length lens. B) The height of the image is approximately -0.00203 m. C) The image is inverted.

A) The image formed by the lens can be determined using the lens formula:

1/f = 1/v - 1/u

where:

f = focal length of the lens

v = image distance from the lens (positive for real images, negative for virtual images)

u = object distance from the lens (positive for objects on the same side as the incident light, negative for objects on the opposite side)

Given:

f = 129 mm = 0.129 m (convert to meters)

u = 1.45 m (object distance)

Substituting the given values into the lens formula:

1/0.129 = 1/v - 1/1.45

To solve for v, we rearrange the equation:

1/v = 1/0.129 + 1/1.45

1/v = (1/0.129) * (1/1 + 1/0.129)

1/v = 1.458 + 7.752

1/v = 9.21

v = 1/9.21 = 0.109 m

Therefore, the image is formed at a distance of 0.109 m from the lens.

B) The height of the image can be determined using the magnification formula:

m = h'/h

where:

m = magnification

h' = height of the image

h = height of the object

Given:

h = 2.70 cm = 0.027 m (convert to meters)

Since the image is formed by a lens, the magnification can be expressed as:

m = -v/u

Substituting the given values:

m = -(0.109 m) / (1.45 m)

m = -0.0752

The negative sign indicates that the image is inverted.

To find the height of the image, we multiply the magnification by the height of the object:

h' = m * h

h' = -0.0752 * 0.027 m

h' = -0.00203 m

Therefore, the height of the image is approximately -0.00203 m.

C) The type of image formed can be determined based on the properties of the image. Since the height of the image is negative (-0.00203 m), we can conclude that the image is inverted.

A) The image is formed at a distance of 0.109 m from the lens.

B) The height of the image is approximately -0.00203 m.

C) The image is inverted.

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when you get the answer please tell me

Use the Principle of Virtual Work to find the equilibrium position of the system in terms of the angle 0 \($\frac{mg}{\sin\theta}\frac{d\theta_2}{dx} -mg -kx + mg\theta\frac{d\theta_1}{dx} = 0$\)

\($\delta W_{BP} = T\delta\theta_2 = \frac{mg}{\sin\theta}\delta\theta_2$\)

The virtual work done by the weight of the block is:

\($\delta W_{mg} = -mg\delta x$\)

The virtual work done by the force exerted by the spring is:

\($\delta W_{kx} = -kx\delta x$\)

Using the small angle approximation \($\tan\theta\approx\theta$\) for small angles, we can express the virtual work done by the tension in terms of \($\delta\theta_1$\):

\($\delta W_{OB} = T\delta\theta_1 = mg\theta\delta\theta_1$\)

Since the system is in equilibrium, the virtual work done by all the virtual forces must be zero:

\($\delta W_{BP} + \delta W_{mg} + \delta W_{kx} + \delta W_{OB} = 0$\)

\($\frac{mg}{\sin\theta}\delta\theta_2 -mg\delta x -kx\delta x + mg\theta\delta\theta_1 = 0$\)

Dividing by \($\delta x$\) and taking the limit as \($\delta x\\)right arrow 0$, we get:

\($\frac{mg}{\sin\theta}\frac{d\theta_2}{dx} -mg -kx + mg\theta\frac{d\theta_1}{dx} = 0$\)

Tension is a term that can be used in various contexts, but generally refers to a state of strain or stress resulting from opposing forces or conflicting circumstances. It can manifest in different ways, such as physical tension in the muscles, emotional tension in interpersonal relationships, or societal tension resulting from political or cultural divisions.

In physics, tension refers to the force transmitted through a string, rope, cable, or other flexible connector that is pulled taut from opposite ends. This tension can be used to transmit forces or to support objects, such as in bridges, cranes, or elevators. In a psychological or emotional sense, tension can refer to a state of unease or anxiety resulting from unresolved conflicts or unmet needs.

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Answer:

Electromagnetic waves are waves that can travel through matter or through empty space

At an average speed of 7m/s, the distance covered in one second is 7 meters.

Speed is simply referred to as distance traveled per unit time.

It is expressed mathematically as;

Speed = Distance ÷ time.

Given the data in the question;

Plug the given values into the above formula and solve for distance traveled.

Speed = Distance ÷ time

Distance = Speed × Time

Distance = 7m/s × 1.0s

Distance = 7ms/s

Distance = 7m

Therefore, in a second, the person covers 7 meters.

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The set of vectors shown in option C best describes the velocity, acceleration, and net force acting on the cylinder at the point indicated in the diagram. The correct answer is option C.

The velocity, acceleration, and net force acting on the cylinder at the point indicated in the diagram can be best described by the set of vectors shown in option C.  At the point indicated in the diagram, the velocity vector is pointing downward, indicating that the cylinder is moving downward. The acceleration vector is also pointing downward, indicating that the cylinder is accelerating in a downward direction. The net force vector is also pointing downward, indicating that the net force acting on the cylinder is in the downward direction.

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Answer:

E

Explanation:

The picture show why its e

Let us assume that the initial direction of the ball, i.e., from the pitching machine to the batter as the negative direction, and the final direction of the ball is the positive direction.

Given,

The mass of the baseball, m=0.148 kg

The initial velocity of the baseball, u=-26 m/s

The final velocity of the baseball, v=39 m/s

The momentum of the ball before the batter hits it is given by,

On substituting the known values,

The momentum of the ball after the batter hits it is given by,

On substituting the known values,

The change in the momentum is given by,

On substituting the known values,

Thus the change in the momentum of baseball is 9.62 kg·m/s

Answer:

I think a Kinetic energy of an object is the measure of the work an object can do by the virtue of its motion.”

Hope this help!:)

1. The current through the resistor R1 just after the switch is closed can be found by using Kirchhoff's laws. The capacitor is initially uncharged, so it behaves like a short circuit.

Therefore, the circuit can be simplified to a series circuit with R1, R2, R3, R4 and the battery. The total resistance of the circuit is R_total = R1 + R2 + R3 + R4 = 256 Ω. The current flowing through the circuit is given by Ohm's law, I = V/R_total, where V is the battery voltage. Therefore, I1(0) = V/R_total = 24/256 = 0.09375 A.

2. A long time after the switch has been closed, the capacitor will be fully charged and behave like an open circuit. Therefore, the circuit can be simplified to a series circuit with R1, R2, R3, R4 and the capacitor. The total resistance of the circuit is still R_total = R1 + R2 + R3 + R4 = 256 Ω. The current flowing through the circuit is given by Ohm's law, I = V/R_total, where V is the battery voltage. Therefore, I1([infinity]) = V/R_total = 24/256 = 0.09375 A.

3. A long time after the switch has been closed, the capacitor will be fully charged to the voltage of the battery, V = 24 V. The charge on the capacitor is given by Q = CV, where C is the capacitance. Therefore, Q([infinity]) = C×V = 82×10⁻⁶ × 24 = 1.968×10⁻³C.

4. With R5 = 94 Ω in series with the capacitor, the total resistance of the circuit is R_total = R1 + R2 + R3 + R4 + R5 = 350 Ω. The current through the circuit just after the switch is closed can be found using the same method as in part 1. Therefore, I1(0) = V/R_total = 24/350 = 0.06857 A.

5. A long time after the switch has been closed, the charge on the capacitor can be found by considering the equivalent circuit with R1, R2, R3, R4 and R5 in series with the capacitor. The total resistance of the circuit is R_total = R1 + R2 + R3 + R4 + R5 = 350 Ω. The voltage across the capacitor is V = IR5, where I is the current flowing through the circuit. Therefore, Q([infinity]) = CV = (IR5)C = (V/R_total)R5C = (24/350)×94×10⁻⁶= 1.608×10⁻³ C.

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Trigonometry allows to find the result for the question about the height of the mountain is:

Trigonometry allows finding relationships between the angles of a right triangle.

         \(tan \theta = \frac{y}{x}\)  

Where θ is the angle, y the opposite leg (height) and x the adjacent leg (horizontal distance).

In the attachment we can see a diagram of the system. They indicate that for x  distance the angle is 14.67º  

         tan 14.67 = \(\frac{y}{x}\)  

At the other point the angle is 10.38º.

        tan 10.38 = \(\frac{y}{x+15860}\)

We look for the horizontal distance (x) with these equations.

        x tan 14.67 = (x + 15860) tan 10.38

        x tan 14.67 / tan 10.38 = x + 15860

        x 1,429 = x + 15860

        x 0.429 = 15860

        x = \(\frac{15680}{0.429}\)

        x = 36955.3 ft

We calculate for the height.

        y = x tan 14.67

        y = 36955.3 tan 14.67

        y = 9674.4 ft

In conclusion using trigonometry we can find the result for the height of the mountain is:

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more than mg

Explanation:

the pressure

Answer:

Little to no change in temperatures between seasons.

Reason: because i got it right on the test, and i smart

Answer:

Little to no change in temperatures between seasons.

Explanation:

I can confirm this is right

Answer:

Normal = 33.95N

Friction = 19.6 N

Coefficient of friction = 0.58

Explanation:

We can represent the situation as follows:

First, we need to calculate the normal force. Since the box is not moving perpendicular to the incline, the normal force and the weight in that direction has to be equal, then

Fn = mgcos30

Fn = (4kg)(9.8 m/s²)cos30

Fn = 33.95 N

In the same way, the box won't slide when the force of friction is equal to the parallel component of the weight, so

Ff = mgsin30

Ff = (4kg)(9.8 m/s²)sin(30)

Ff = 19.6 N

Additionally, the friction force is equal to

Ff = μFn

Where μ is the coefficient of friction, so solving for μ and replacing the values, we get:

μ = Ff/Fn

μ = 19.6/33.95

μ = 0.58

Therefore, the answers are:

Normal = 33.95N

Friction = 19.6 N

Coefficient of friction = 0.58

A white dwarf remains stable in size due to electron degeneracy pressure, which prevents its atoms from collapsing further despite the absence of nuclear fusion reactions.

A white dwarf is a remnant of a low to medium mass star that has exhausted its nuclear fuel and undergone gravitational collapse. As the star's core collapses, its electrons become tightly packed together, leading to electron degeneracy pressure that opposes further compression. This results in a stable size for the white dwarf, where the inward force of gravity is balanced by the outward force of electron degeneracy pressure. Since there are no nuclear fusion reactions to generate heat, the white dwarf eventually cools and dims over time, becoming a cold black dwarf.

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Answer:

Explanation:

brash this so hard