A hair dryer draws 14.5 A when plugged into a 120-V line. Assume direct current. Part A What is its resistance? Express your answer to two significant figures and include the appropriate units. Part B How much charge passes through it in 11 min ? Express your answer to two significant figures and include the appropriate units.

Answer:

F=-100N; a=1.3m/s^2

Explanation:

Force is being made by student, so wall counteracts that force by not moving so it is equally opposite.

The force of the wall pushing back on the student would be 100 Newtons, and the acceleration of the student as she moves away from the wall would be 1.33 m/s²

Newton's third law of motion state that for every action force there exists a complementary reaction force that balances it.

As given in the problem a student is on a skateboard facing a wall. The student and skateboard have a mass of 75 kilograms. The student pushes off of the wall with a force of 100 Newtons,

The force of the wall pushing back the student = 100 Newtons

The acceleration of the student = 100/75

                                                     =1.33 m/s²

Thus, The student would be pushed back against the wall by a force of 100 Newtons, and she would accelerate away from the wall at a rate of 1.33 m/s².

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a) The greenhouse effect refers to the process by which certain gases in the Earth's atmosphere trap and re-emit heat from the sun, leading to a warming effect on the planet's surface.

These gases, including carbon dioxide, water vapor, methane, and others, act like a blanket around the Earth, absorbing and trapping the sun's radiation and preventing it from escaping into space.

b) Atmospheric water vapor is a key component of the Earth's climate system, as it plays a crucial role in the greenhouse effect. As water vapor absorbs and re-emits radiation from the sun, it helps to trap heat in the atmosphere and keep the planet warm.

However, the amount of water vapor in the atmosphere is strongly influenced by temperature and other factors, which can in turn affect climate patterns and weather events.

c) The increased concentration of carbon dioxide in the atmosphere changes the climate because it enhances the greenhouse effect. Carbon dioxide is a particularly potent greenhouse gas, as it absorbs and re-emits radiation across a range of wavelengths, effectively trapping more heat in the atmosphere. As humans burn fossil fuels and engage in other activities that release carbon dioxide into the air, the concentration of this gas increases, leading to a buildup of heat-trapping gases and a corresponding increase in global temperatures.

d) The melting of continental glaciers and sea ice in polar regions can accelerate the rise in temperature through a process known as positive feedback. As the ice melts, it exposes more land and water, which in turn absorb more solar radiation and heat up. This leads to further melting, which exposes even more land and water, and so on.

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While accelerating at a constant rate from 12.0 m/s to 18.0 m/s, a car moves over a distance of 60.0 m. The time taken by the car will be 4 seconds. the correct answer is option(c).

When acceleration is constant, the rate of change in velocity is also constant. In the absence of any acceleration, velocity remains constant. When acceleration is positive, velocity becomes more significant.

Let a denote acceleration, u denote initial velocity, v denote final velocity, and t denote time.

The equation of motion is stated as,

v = u + at

v² = u² + 2as

A car travels across a distance of 60.0 m while accelerating constantly from 12.0 m/s to 18.0 m/s.

Then the time taken by the car will be,

u = 12 m/s

v = 18 m/s

s = 60 m

Put these in the equation v² = u² + 2as.

18² = 12² + 2 x a x 60

a = 1.5

Then the time will be

18 = 12 + 1.5t

1.5t = 6

t = 4 seconds

Hence, the time taken is 4 s.

The complete question is:

While accelerating at a constant rate from 12.0 m/s to 18.0 m/s, a car moves over a distance of 60.0 m. How much time does it take?

1.00 s

2.50 s

4.00 s

4.50 s

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Let's just suppose this situation, so it's like this;

Q --------------- q --------------- Q

Now, acc. to the question, the system is equilibrium which means that possibly both the Q should be exerting some pressure on the middle charge q, so let's suppose Q be +ve and q be -ve

The charge that we have kept at a certain distance something like this;

+Q --------------- -q --------------- +Q

<––– d ––– > <––– d ––– >

Now, we +Q will be exerting some force on the another +Q that it should be acc. to columbs law like this;

F = k × Q1Q2/r²

F = k × QQ/(2d)²

F1 = k × Q²/4d²

Also, when this +Q will exert force on -q, it could be written as;

F = k × Q1Q2/r²

F2 = k × Qq/d²

From the question, we know that the system is a equilibrium which means that these two force F1 and F2 will be equal to each other;

= k × Q²/4d² = k × Qq/d²

= Q/4 = q

= Q/4 = -q

= -Q/4 = q

So, the charge on q is -Q/4.

-------------------------------------------

Have already answered this question, but still!

Answer:

C. Radioactive decay

Explanation:

Answer:

Radioactive Decay

Explanation:

Ap3x

A football player kicks a 0.5 kg stationary football with a force of 60 N.

The force exerted on the player's foot by the football is 60 N

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Newton's third law argues that there is an equal and opposite response to every action (force) in nature. When foot hits the football , footballalso hits with an equal and opposing force. In other words, interactions produce forces.

A football player kicks a 0.5 kg stationary football with a force of 60 N.

The force exerted on the player's foot by the football is 60 N

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The correct option is: Both (a) and (b) are responsible for the heat.

When hydrogen burns in air, the reaction produces water (H₂O) according to the equation: 2H₂ + O₂ → 2H₂O. In this exothermic reaction, heat is given off as a result of energy changes during bond breaking and bond formation.

In the reaction, breaking the hydrogen bonds (H-H) requires an input of energy, as bonds need to be broken. However, forming the hydrogen-oxygen bonds (H-O) in water releases energy, as new bonds are being formed.

Similarly, breaking the oxygen bonds (O=O) requires energy, while the formation of the oxygen-hydrogen bonds (O-H) in water releases energy.

Therefore, both the breaking of hydrogen bonds and breaking of oxygen bonds require energy input, but the energy released from forming the hydrogen-oxygen bonds is greater, resulting in a net release of heat.

As a result, both (a) breaking hydrogen bonds and (b) breaking oxygen bonds are responsible for the heat generated during the combustion of hydrogen in air.

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Complete question here:

Heat is given off when hydrogen burns in air according to the equation 2H2 + O2==>2H20

Which of the following is responsible for the heat?

Breaking hydrogen bonds gives off energy.

Breaking oxygen bonds gives off energy.

Forming hydrogen-oxygen bonds gives off energy

Both (a) and (b) are responsible.

(a), (b), and (c) are responsible.

Answer:The height of the mercury column is a measure of the atmospheric pressure pushing down on the pool of mercury. The pressure of the atmosphere can be calculated using the equation:

P = ρgh

where P is the pressure in Pascals (Pa), ρ is the density of mercury (13,595 kg/m³), g is the acceleration due to gravity (9.81 m/s²), and h is the height of the mercury column (687 mm = 0.687 m).

First, we need to convert the density of mercury from kg/m³ to g/cm³ to match the units of the height:

ρ = 13,595 kg/m³ = 13.595 g/cm³

Now we can plug in the values and solve for P:

P = ρgh

P = (13.595 g/cm³) x (9.81 m/s²) x (0.687 m)

P = 101,325 Pa

Finally, we can convert the pressure from Pascals to atmospheres:

1 atm = 101,325 Pa

P(atm) = P(Pa) / 101,325 Pa/atm

P(atm) = 101,325 Pa / 101,325 Pa/atm

P(atm) = 1 atm

Therefore, the pressure of the atmosphere around the pool of mercury is 1 atmosphere (atm).

Explanation:

Answer:237.6 km/h

Explanation:

66m/s to kilometres per hour

66m/s x18/5=237.6km/h

Answer:

one watt power is defined as power produced when one joule of work is done in one second.

hope it helps

stay safe healthy and happy

Okay, let's break this down step-by-step:

* The rate of energy transfer is 30 J/s ( joules per second )

* We need to produce 1500 J of heat energy

* So we divide the total energy needed (1500 J) by the energy transfer rate (30 J/s)

* 1500 J / 30 J/s = 50 seconds

Therefore, the time taken to produce 1500J of heat energy if the rate of energy transfer is 30 J/s is 50 seconds.

The resistance of a wire depends on its length, cross-sectional area, and the resistivity of the material it is made of. The resistivity is a material property that determines how strongly a material opposes the flow of electric current.

In this case, we have two wires made of the same material, so they have the same resistivity. Let's calculate the resistance of the second wire.

The resistance of a wire can be calculated using the formula: R = (ρ * L) / A

Where:

R is the resistance,

ρ (rho) is the resistivity,

L is the length of the wire, and

A is the cross-sectional area of the wire.

For the first wire:

Length (L1) = 10 m

Diameter (d1) = 1.0 mm

Radius (r1) = d1 / 2 = 0.5 mm = 0.5 * 10^(-3) m

Cross-sectional area (A1) = π * (r1)^2 = π * (0.5 * 10^(-3))^2

Resistance (R1) = 5.0 Ω

Using the formula, we can rearrange it to solve for resistivity (ρ):

ρ = (R * A) / L

Substituting the values for the first wire:

ρ = (5.0 * π * (0.5 * 10^(-3))^2) / 10

Now, let's calculate the resistance of the second wire:

Length (L2) = 3.0 m

Diameter (d2) = 4.0 mm

Radius (r2) = d2 / 2 = 2.0 mm = 2.0 * 10^(-3) m

Cross-sectional area (A2) = π * (r2)^2 = π * (2.0 * 10^(-3))^2

Resistance (R2) = ?

Using the formula:

R2 = ρ * (L2 / A2)

Substituting the values:

R2 = ρ * (3.0 / (π * (2.0 * 10^(-3))^2))

Now, substitute the value of ρ we obtained earlier:

R2 = (5.0 * π * (0.5 * 10^(-3))^2) / 10 * (3.0 / (π * (2.0 * 10^(-3))^2))

Simplifying the expression:

R2 = (5.0 * (0.5 * 10^(-3))^2) / 10 * (3.0 / (2.0 * 10^(-3))^2)

R2 ≈ 1.875 Ω

Therefore, the resistance of the second wire is approximately 1.875 ohms.

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Answer:

Gas like oxygen, nitrogen etc

Answer:

Solution given:

Wight [W]=500N

gravity [g]=10m/s²

mass[m]=?

we have

W=mg

500=m*10

m=500/10

m=50kg

the mass of the truck is 50kg.

The following measurement means "no limitation". This measurement indicates the range of motion for wrist flexion, which is the movement of the wrist towards the palm of the hand.

What is wrist flexion?

Wrist flexion is the movement of the wrist towards the palm of the hand. It is the opposite movement of wrist extension, which is the movement of the wrist away from the palm of the hand. Wrist flexion is an important motion for many daily activities such as typing, writing, and holding objects.

What does 15-85 degrees of wrist flexion mean?

When measuring wrist flexion, the range of motion is measured in degrees. In this case, the measurement is 15-85 degrees. This means that the normal range of motion for wrist flexion is between 15 and 85 degrees. If the measurement falls within this range, then there is no limitation in wrist flexion. However, if the measurement falls outside of this range, then there may be a limitation in wrist flexion.A limitation in extension refers to a decreased range of motion when moving the wrist away from the palm of the hand. A limitation in flexion refers to a decreased range of motion when moving the wrist towards the palm of the hand. A limitation in both flexion and extension refers to a decreased range of motion in both movements.

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At latitude 50 degrees N, the celestial equator will cross the meridian at an altitude of 50 degrees in the north.

At latitude 50 degrees N, the celestial equator crossing the meridian refers to the moment when the celestial equator (an imaginary circle projected onto the celestial sphere) intersects the observer's meridian (a line passing through the zenith and the celestial poles). The altitude of an object in the sky is the angle between the object and the observer's horizon. In this case, we are interested in the altitude of the celestial equator at the moment of crossing the meridian.

Given the latitude of 50 degrees N, which is above the equator, the celestial equator will appear to be lower in the sky when crossing the meridian. Since the celestial equator is inclined to the celestial poles at an angle equal to the observer's latitude, which is 50 degrees in this case, the altitude of the celestial equator at the moment of crossing the meridian will be equal to the observer's latitude. Therefore, at latitude 50 degrees N, the celestial equator will cross the meridian at an altitude of 50 degrees in the north.

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Answer:

Explanation:

The gravitational force between the earth and another body is F = -GM_em/r^2 r where G = 6.67 times 10^-11 Nm^2/kg^2 is the gravitational constant, M_e = 5.97 times 10^24 kg is the mass of the earth, m is the mass of the other body, and r is the position vector of the second body with respect to the centre of the earth.

Answer:

the answer is 1500 you multiply the distance and force to get work

false, as it depends on the type of defibrillator being used. In general, automated external defibrillators (AEDs) are designed to be used by anyone, even those without medical training, in an emergency situation.

These devices typically have adhesive pads with sensors that are placed directly on the patient's bare chest. It is recommended to remove any clothing or jewelry that may interfere with the sensors and the shock delivery.However, there are also some newer AED models that are specifically designed to be used over clothing. These devices have pads with enhanced sensors that can detect and compensate for the extra layer of fabric. They are often used in settings where quick access to bare skin may not be possible, such as on sports fields or in public places. So, in summary, the pads used to deliver the electrical shock to the heart can be placed over clothing in some cases, but it is generally recommended to remove any clothing or jewelry that may interfere with the sensors and the shock delivery for most AEDs. It is important to follow the specific instructions for the defibrillator being used and to seek professional medical help as soon as possible in any emergency situation.

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Answer:

A popular set of Peg-Words

What is a Peg-Word?

They're easy to remember because they rhyme with the names of the first ten natural numbers, is: one is a bun, two is a shoe, three is a tree, four is a door, five is a hive, six is sticks, seven is heaven, eight is a gate, nine is wine, ten is a hen.

Answer:

Tides and Water Levels

Explanation:

When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides—both commonly called spring tides

:)

Because solid concrete is stiffer, denser, and typically warmer than air, the speed of sound in solid concrete is faster than in air.

The sound wave moves at a 340 m/s pace. D = v • t can be used to calculate the distance, giving a value of 25.5 m. Since 0.150 seconds is the round-trip distance, use 0.075 seconds for the time.

The speed at which a sound source needs move in the direction of a stationary observer in order to double the apparent frequency. 640 m s - 1.

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Sound travels at approximately 343 meters (or 1,125 feet) per second in dry air at room temperature.

To determine how far away lightning is when thunder sounds 10 seconds after the lightning flash, we can use the speed of sound.

Distance = Speed × Time

Distance = 343 m/s × 10 s

Distance = 3,430 meters

Therefore, if thunder sounds 10 seconds after the lightning flash, the lightning is approximately 3,430 meters (or 3.43 kilometers) away.

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The plane was flying at 39.6 m/s when the bottle was released .

\(h = ut + 1/2at^2\)

distance fallen h= 500m

Initial velocity u=0

a=98 m/s2

\(h = 1/2at^2\)

\(t^2 = 2h/a\)

\(t^2 = 1000/9.8 = 10.1s\)

\(d_h = 400, t = 10.1s\)

\(v = d_h/t\\v = 400/10.1\)

v = 39.6 m/s

Altitude or Height  (also known as depth) is a measurement of the distance between a reference point and a point or object, usually in a vertical or "upward" direction. The exact definition and reference value varies depending on the context (eg, aeronautics, geometry, geodesy, sports, or barometric pressure). Although the term height is often used to refer to the height of a place above sea level, in geography the term height is often preferred for this use.

The vertical measurement of distance in the "down" direction is usually called depth.

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Answer:

to have courage and show the strength of your character. ... A person with true grit has passion and perseverance. Goals are set and followed through.

Explanation:

for example: i had the passion and the courage to finish my school work and chores for i can go out with my friends and to get out of the house for a bit and have fun so i had the courage to finish chores from the house and do some schoolwork for i can finish ad hang out with some friends. so i had the strength to finish everything because i didn't want to be doing school work and chores any more so i had the passion to finish up quickly  

Utilizing the given information and the numerical arrangement to the warm dissemination condition, the approximate temperature at the center is 44.6 °C after two-time steps of 0.01 s.

To calculate the inexact temperature at the center of the bar after two-time steps of 0.01 s utilizing the given values, let's substitute the values into the condition:

T(3,2) = 62 + 5 * (0.01 / 0.5^2) * (15 - 2 * 62 + 22)

To begin with, let's disentangle the expression interior the brackets:

T(3,2) = 62 + 5 * (0.01 / 0.25) * (15 - 124 + 22)

Presently, let's perform the calculations step by step:

T(3,2) = (62 + 5) * ((0.01 / 0.25) * (-87))

T(3,2) = (62 + 5) * (0.04 * (-87))

T(3,2) = 62 + 0.2 * (-87)

T(3,2) = (62 - 17.4)

T(3,2) =( 44.6)

So, the approximate temperature at the center of the bar after two-time steps of 0.01 s is 44.6 °C.

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The name for galaxies held together by gravity is a "galactic cluster" or a "galaxy cluster."

Galaxy clusters are known as the largest gravitationally bound structures in the universe. A galaxy cluster is a cluster of galaxies or a group of galaxies held together by gravitational attraction.

Galaxies in a cluster are bound to one another by gravity, as they all orbit a shared center of mass.Galactic clusters are held together by the force of gravity and are made up of many galaxies.

These galaxies are held together by the gravitational force of dark matter, which is the most massive component of galaxy clusters. Galaxy clusters, also known as clusters of galaxies, are some of the most enormous objects in the universe with a typical size of around a few million light-years across.

A single galaxy cluster might comprise thousands of galaxies, as well as hot gas and dark matter.A  answer to the question "What is the name for galaxies held together by gravity?" is galaxy cluster or galactic cluster.

it can be explained that a galaxy cluster is a group of galaxies held together by gravity and comprises many galaxies that are gravitationally bound to one another. Galaxy clusters are the largest gravitationally bound structures in the universe and are made up of hot gas, dark matter, and thousands of galaxies.

Dark matter is the most massive component of galaxy clusters and holds the galaxies together with its gravitational force. Thus, the name for galaxies held together by gravity is a galaxy cluster or a galactic cluster.

To conclude, galaxy clusters are a cluster of galaxies or a group of galaxies held together by gravitational attraction and comprise thousands of galaxies, hot gas, and dark matter. The gravitational force of dark matter holds the galaxies together, making them the largest gravitationally bound structures in the universe.

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Answer:

500 Newton itself

Explanation:

Newton's third law of motion

Answer:

Since the two colliding objects travel together in the same direction after the collision, the total momentum is simply the total mass of the objects multiplied by their velocity.

Explanation:

Answer:

The Ability to do work

Explanation:

energy is needed to do work because without energy no work can be done due to the fact that there is no energy