Which device will allow you to reduce the voltage from 120 vac to vdc in order to charge a cell phone?

1- a diode
2- a fuse
3- a transformer
4- An alternator

Answer:

for the first time in the future of our games are based on your car advertising

Explanation:

for the first time in the fhgvhbgj tire and wheel drive automatic captions and subtitles for the first time in the future of our games of

Answer:

107.4 meters

Explanation:

gravity is 9.8m/s^2

max height = (velocity squared times sin squared angle) ÷ ( speed of gravity times 2 )

max height = (48 squared times sin of 73 squared) ÷ ( 9.8 times 2 )

Answer:

Gravity of a particular planet depends on the mass of the planet and the radius of the planet.

Explanation:

Answer:

IT DEPENDS PARTICULARLY ON THE MASS OF AN OBJECT

Answer:

volume

Explanation:

it depends on the volume of the items

hope this helps

Answer:mass

Explanation:

gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. This means that the force of gravity increases with mass, but decreases with increasing distance between objects.

Part 1: The number of pathways in a circuit determines the possible routes for electric current to flow.

There are maximum of five pathways in this circuit, depending on its complexity and the arrangement of components.

Part 2: Determining whether the circuit is series or parallel requires more information.

In a series circuit, components are connected in a single path, and the current flows through each component sequentially.

If the circuit has only one pathway (zero or one pathway), it suggests a series circuit.

However, if the circuit has multiple pathways (two or more pathways), it indicates a parallel circuit.

To conclusively determine the circuit's nature, we need to analyze the circuit diagram or obtain additional details regarding the component connections and their interactions.

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Answer:

A light bulb is that component of circuit that lights up when electricity flows through it and vice versa. Its main function is to tell whether electricity is being supplied or not. Its function is also to light up dark places.

Explanation:

Answer:

A light bulb is that component of circuit that lights up when electricity flows

Explanation:

The energy of the flywheel can be calculated using the equation E = \(0.5Iw^2\), where I is the moment of inertia and ω is the angular velocity.

For a flywheel with a radius of 1m and mass of 500kg, the moment of inertia is\(500 x (1m)^2 = 500 kg-m2.\) The angular velocity is 500 revolutions per minute, which is equivalent to 8.667 rad/s. Plugging these values into the equation gives us \(E = 0.5 x 500 x (8.667)^2 = 35,584.7 J.\)

The energy of a flywheel is the energy stored in the kinetic form due to its rotation. It is defined as the product of the moment of inertia and the square of the angular velocity of the flywheel.

The energy stored in the flywheel is proportional to the square of the angular velocity and is also proportional to the moment of inertia. The greater the angular velocity, the more energy is stored in the flywheel.

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Answer:

Si tienen diferencia

Explanation: Internas: Proviene de la herencia; el legado genético que las personas reciben de sus padres.

Externa: Provienen de las experiencias personales frente

al mundo exterior

Answer:

Explanation:

We don't need the mass of the car in the equation to solve for final velocity, since the values given for the acceleration and the time it took to accelerate to that velocity are given. The equation we need is the one for acceleration, which is

\(a=\frac{v_f-v_0}{t}\) We are solving for final velocity, we know the initial velocity is 0 (starting from rest), and the time to complete this acceleration (10 m/s/s) is 3 seconds:

\(10=\frac{v_f-0}{3}\) which is the same thing as saying

\(10=\frac{v}{3}\) so

v = 30 m/s

The momentum of the water balloon at the given speed is 7.2 kgm/s.

The given parameters:

The momentum of the water balloon is calculated as follows;

P = mv

Substitute the given values of mass and velocity as follows;

P = 0.4 x 18

P = 7.2 kg m/s.

Thus, the momentum of the water balloon at the given speed is 7.2 kgm/s.

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(a) Your weight in Newtons is 560.7 N.

(b)  Your mass in kilograms is 57.12 kg.

(c) Your weight on the moon is 93.45 N.

a) To convert your weight from pounds to Newtons, we can use the conversion factor that 1 pound is equal to 4.45 Newtons.

Therefore, your weight in Newtons would be:

126 pounds x 4.45 Newtons/pound = 560.7 Newtons

b) To find your mass in kilograms, we can use the formula:

mass (kg) = weight (N) / acceleration due to gravity (m/s²)

The acceleration due to gravity on Earth is approximately 9.81 m/s². Therefore, your mass in kilograms would be:

mass (kg) = 560.7 N / 9.81 m/s² = 57.12 kg

c) The gravitational force between two objects depends on their masses and the distance between them. The gravitational force on the moon is about 1/6th the gravitational force on Earth.

Therefore, if you went to the moon, your weight would be about 1/6th of what it is on Earth.

Your weight on the moon would be:

126 pounds / 6 = 21 pounds

To convert this to Newtons, we can use the conversion factor:

1 pound = 4.45 Newtons

So your weight on the moon in Newtons would be:

21 pounds x 4.45 Newtons/pound = 93.45 Newtons

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Answer:

terrestrial ecosystem and pond ecosystem is an aquatic ecosytem, hence both their abiotic and biotic components would be different.

Explanation:

Answer:

a=3.5m/s^2

Explanation:

f=ma(f=force m=mass a=acceleration)

1575=450a

a=1575/450

a=3.5m/s^2

Answer:

3.5ms^-2

Explanation:

m = 450kg, F = 1575N, a = ?

Since F = ma

Making acceleration subject of the formula

We have;

a = F/m

Substituting we have;

a = 1575/450

a = 3.5ms^-2

Answer:

There is no particular relationship between the height and shoe size. But the shoe sizes in males is usually bigger than females. And the shoe size tends to get bigger when the person is taller.

Explanation:

Answer:

B

Explanation:

The impulse experienced by an object is the force•time.

Answer:

BETTER EXPLANATION

Explanation:

When you drink from a straw, you create a little space of low pressure inside your mouth and in the top of the straw. Then the air outside the straw pushes down on the surface of the drink and forces the liquid up through the straw and into your mouth.

Answer:

b

Explanation:

The symmetrical pattern of magnetic polarities about spreading ridges in oceanic crust basalts indicates that the earth's magnetic field changes polarity periodically.

Magnetic polarity refers to the direction of the magnetic field of the Earth. Scientists use the term paleomagnetism to describe the magnetic orientation of rocks when they were formed. They can study the magnetic properties of the rocks to learn more about the Earth's magnetic field.The Earth's magnetic field is constantly changing. In the past, it has flipped or reversed directions.

This reversal is called geomagnetic reversal. When the Earth's magnetic field changes, the north and south magnetic poles switch places. This change can take anywhere from a few thousand years to a million years to occur.The symmetrical pattern of magnetic polarities about spreading ridges in oceanic crust basalts indicates that the Earth's magnetic field changes polarity periodically.

When new oceanic crust forms at mid-ocean ridges, magma is erupted and cools to form new rock. The magnetic minerals in the rock align themselves with the Earth's magnetic field. By studying the magnetic properties of rocks on either side of a mid-ocean ridge, scientists can determine the direction of the Earth's magnetic field at the time the rock was formed.

The symmetrical pattern of magnetic polarities on either side of the ridge indicates that the magnetic field has changed polarity in the past.

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Shocks cause shifts in AD and AS curves, and the placement of point E, representing the new equilibrium, depends on these shifts.

Shocks can affect the economy through changes in aggregate demand or aggregate supply. An increase in aggregate demand would shift the AD curve to the right, reflecting higher overall demand for goods and services. This shift would result in a higher level of output and prices in the short run. Consequently, point E would be placed at a higher level of output and higher price level.

On the other hand, a positive supply shock, such as a decrease in production costs or an increase in productivity, would shift the AS curve to the right. This shift implies higher output and lower prices in the short run. In this case, point E would be located at a higher level of output and a lower price level.

Conversely, a negative supply shock, such as an increase in production costs or a decrease in productivity, would shift the AS curve to the left. The resulting equilibrium at point E would be characterized by lower output and higher prices in the short run.

To determine the placement of point E, it is necessary to identify the specific shifts caused by the shocks, such as an AD shift, a positive supply shock (AS shift to the right), or a negative supply shock (AS shift to the left). Once the shifts are identified, the corresponding changes in output and price level can be determined, and point E can be placed accordingly in the new short-run equilibrium.

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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

The correct range for the temperature danger zone is 40-140°F.

The temperature danger zone refers to the range of temperatures in which bacteria can grow and multiply rapidly, posing a risk of foodborne illnesses. The correct range for the temperature danger zone is 40-140°F (4-60°C). Within this temperature range, bacteria can multiply quickly, reaching dangerous levels that can lead to food poisoning.

Temperatures below 40°F (4°C) can slow down bacterial growth, while temperatures above 140°F (60°C) can kill most bacteria. However, between 40-140°F, bacteria thrive and can double in number every 20 minutes, increasing the risk of foodborne illnesses.

Maintaining proper temperature control is crucial in food safety to prevent bacterial growth and minimize the risk of foodborne illnesses. This is particularly important for perishable foods such as meats, poultry, fish, dairy products, cooked rice, and cooked vegetables.

To ensure food safety, it is recommended to keep cold foods below 40°F (4°C) and hot foods above 140°F (60°C).

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The lump of clay at 10 m/s has a larger initial momentum compared to the clay at 5 m/s. When the clay comes to a stop, the change in momentum for the clay at 10 m/s is greater than that of the clay at 5 m/s. Thus, the 1 kg lump of clay moving at 10 m/s experiences a greater impulse.

Impulse is defined as the change in momentum of an object and is calculated by multiplying the force exerted on an object by the time interval over which the force acts. In this case, impulse is given by the equation:

Impulse = Force × Time

Since we are comparing two scenarios with the same mass, the impulse depends solely on the velocity and time. The greater the change in velocity and the longer the time interval, the greater the impulse.

In the given scenario, the 1 kg lump of clay has a velocity of 10 m/s. Therefore, its initial momentum is given by:

Initial momentum = mass × initial velocity

                = 1 kg × 10 m/s

                = 10 kg·m/s

If this lump of clay comes to a stop, its final momentum would be zero. The change in momentum is therefore:

Change in momentum = final momentum - initial momentum

                 = 0 - 10 kg·m/s

                 = -10 kg·m/s

However, impulse is a scalar quantity, meaning it only represents magnitude. Therefore, the negative sign is disregarded, and the magnitude of the impulse is 10 kg·m/s.

Now let's consider the other scenario, where the lump of clay has a velocity of 5 m/s. The initial momentum in this case is:

Initial momentum = 1 kg × 5 m/s

                = 5 kg·m/s

If this lump of clay comes to a stop, its final momentum would be zero. The change in momentum is therefore:

Change in momentum = final momentum - initial momentum

                 = 0 - 5 kg·m/s

                 = -5 kg·m/s

Again, we disregard the negative sign and consider the magnitude of the impulse, which is 5 kg·m/s.

Comparing the two scenarios, we can conclude that the 1 kg lump of clay at 10 m/s has a greater impulse (10 kg·m/s) compared to the 1 kg lump of clay at 5 m/s (5 kg·m/s).

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The two characteristics that each skull shares with the other, proving that they are all related, are as follows: Each of them has a ridge that usually sticks out from the top. There are a row of flattened teeth on each skull.

Homologue or analogous structures can describe similar body parts. In support of evolution, both offer evidence. Because they were passed down from a common ancestor, homologous structures are those found in related organisms that are similar.

The shared characteristics of the skulls.

As a result, the following characteristics of each skull indicate that they are all related:

They all share a ridge that usually sticks out the top.

The teeth on each of the skulls are flattened.

The general shape of every skull is the same.

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Answer:

My best friend lol cuz since quarantine i didn't see her

We can calculate the refractive index by substituting the values into the formula: n = √(1 - (2.774 × 10^6 / f)^2). The refractive index of the ionospheric layer can be determined using the formula n = √(1 - (f_ce / f)^2)

(a) The refractive index of the ionospheric layer can be determined using the formula n = √(1 - (f_ce / f)^2), where n represents the refractive index, f_ce is the electron gyrofrequency, and f is the frequency of the incident wave.

The electron gyrofrequency (f_ce) can be calculated using the formula f_ce = 8.978 × √(N), where N is the electron density. Substituting the given electron density value, we have f_ce = 8.978 × √(24.536 × 10^11) ≈ 2.774 × 10^6 Hz.

Now, we can calculate the refractive index by substituting the values into the formula: n = √(1 - (2.774 × 10^6 / f)^2).

(b) The critical frequency for the communication link can be determined using the formula f_c = f_ce / sin(θ), where f_c represents the critical frequency and θ is the angle of incidence. Substituting the given angle of 60°, we have f_c = 2.774 × 10^6 Hz / sin(60°).

(c) The maximum usable frequency (MUF) can be calculated using the formula MUF = f_c / sin(θ). Substituting the critical frequency and angle of incidence given in parts (b) and (a), respectively, we can find the MUF.

(d) Transmissions would fail at the frequencies of 10 MHz and 30 MHz because they are below the critical frequency. The critical frequency represents the maximum frequency that can be reflected back to Earth by the ionospheric layer. If the frequency of the transmission is below the critical frequency, the wave would penetrate through the ionosphere and not be reflected back, leading to a failed transmission.

(e) The ionosphere bends high-frequency radio waves towards Earth due to the phenomenon of refraction. When a radio wave encounters the ionosphere, which is composed of charged particles, it experiences a change in speed and direction. This change in speed and direction is due to the varying density and composition of the ionosphere at different altitudes.

As the radio wave passes through the ionosphere, its path is curved downward towards the Earth's surface. This bending phenomenon occurs because the refractive index of the ionosphere is greater than that of the surrounding vacuum or atmosphere. The higher the frequency of the radio wave, the greater the bending effect due to the higher electron density in the ionosphere at higher altitudes.

This bending of high-frequency radio waves allows for long-distance communication by enabling the waves to travel beyond the line-of-sight. It plays a crucial role in long-distance radio communication, especially in areas where direct line-of-sight transmission is obstructed by the Earth's curvature or other obstacles.

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There is direct relationship between harmonics and resonance frequency.

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Total resultant velocity=5.11-3.27=1.84m/s

\(\\ \sf\longmapsto ∆P=P\)

\(\\ \sf\longmapsto m_1v_1=m_2v_2\)

\(\\ \sf\longmapsto v_2=\dfrac{m_1v_1}{m_2}\)

\(\\ \sf\longmapsto v_2=\dfrac{61.4(1.84)}{109}\)

\(\\ \sf\longmapsto v_2=112.976/109\)

\(\\ \sf\longmapsto v_2\approx 1.3m/s\)

The velocity of the plane and the pilot before the pilot jumps is 0.25 m/s.

The given parameters;

The velocity of the plane and the pilot before the pilot jumps is calculated by applying the principle of conservation of linear momentum for inelastic collision as follows;

\(m_1u_1 + m_2u_2 = v(m_1 + m_2)\\\\61.4(-5.11) \ + \ 109(3.27) = v(61.4 + 109)\\\\42.68 = v(170.4)\\\\v = \frac{42.68}{170.4} \\\\v = 0.25 \ m/s\)

Thus, the velocity of the plane and the pilot before the pilot jumps is 0.25 m/s.

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Answer:

A tidal is a type of wave is most affected by gravity from the sun and the moon.

Explanation:

I hope it helps ❤❤

Tidal wave is the type of wave which is most affected by gravity from the

Sun and the moon

The sun and the moon's gravitational pull results to the tidal force being

generated. The tidal force from the tidal wave generated has some effects

on the earth.

It causes the  Earth and its water content to bulge out on two sides of the

earth. It bulges in the area with the highest proximity to the moon and areas

with the lowest proximity. This is responsible for the formation of high tides

in  water bodies.

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