an electric fan is plugged into an outlet and the circuit completed, making the fan blades spin. which of the following correctly describes this situation? responses mechanical energy is transformed into electrical energy. mechanical energy is transformed into electrical energy. mechanical energy is destroyed, and electrical energy is created. mechanical energy is destroyed, and electrical energy is created. electrical energy is transformed into mechanical energy. electrical energy is transformed into mechanical energy. electrical energy is destroyed, and mechanical energy is created. electrical energy is destroyed, and mechanical energy is created.

The velocity flow field is irrotational and the conservation of mass is preserved.

Irrotational flow for a two-dimensional velocity field happens when

[tex]\frac{dv}{dx} \:-\: \frac{du}{dy} \:=\: 0[/tex]

Conservation of mass for an incompressible happens when

[tex]\frac{du}{dx} \:+\: \frac{dv}{dy} \:=\: 0[/tex]

Perimeter

Calculate the derivate in each function.

Checking the irrotational flow

[tex]\frac{dv}{dx} \:-\: \frac{du}{dy} \:=\: 2y - 2y = 0[/tex]

Checking conservation of mass for an incompressible

[tex]\frac{du}{dx} \:+\: \frac{dv}{dy} \:=\: - 2x - 1 + 2x + 1 = 2x - 2x + 1 - 1 = 0[/tex]

So the velocity flow field is irrotational and the conservation of mass is preserved.

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Answer:

See below

Explanation:

Work = F * d

        = 370 N * 3.66 m = 1354.2  J

A Water waves are formed by the interaction between the earth, moon and the sun and usually of short wavelength.

Gamma rays have incredibly short wavelengths that are only a small percentage of the size of atoms, but other wavelengths can extend as far as the cosmos, despite the fact that the relationship between wave frequency and wavelength is inverse. Although it is not often stated explicitly, electromagnetic radiation wavelengths are frequently represented in terms of the vacuum wavelength, regardless of the medium they pass through.

Electromagnetic radiation's behavior is influenced by its wavelength. Wavelength times frequency equals the speed of light. Energy is obtained by multiplying frequency by the Planck constant. The wave number in centimeters is 1/wavelength. A rough estimate of the wavelength size is shown along with the wavelengths of various regions of the electromagnetic spectrum.

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According to the research, the correct answer is that the conditions that affect hurricanes causing them to change direction are higher latitudes.

It is a tropical cyclone that generates strong winds whose storms circulate around a center of low pressure.

In this sense, this phenomenon usually has its beginning in the tropics around the area of low pressure whose direction is influenced by the Coriolis effect that diverts the trajectory of objects that move over the Earth's surface and the higher latitudes that reverse the steering winds.

Therefore, we can conclude that higher latitudes and the Coriolis effect are conditions that affect the path of hurricanes by changing their direction.

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The calculated value is 84.03 ft. The deceleration will be calculated by multiplying the final velocity by the initial velocity, then dividing that result by the time it takes for the velocity to drop.

Given that you don't have enough time to complete this task, you can only apply the kinematic formula Vf 2 = Vi 2 + 2aD, which includes all the variables.

0 for Vf = Final Velocity (since you are trying to stop)

Initial Velocity = 50 MPH (Vi)

a= acceleration equals 32 ft/s2.

D is the distance covered (displacement)

We must ensure that all variables and constants are in the same units before we can use this formula. This means that all of your measurements should be in feet (ft) or miles (mi), and all of your time measurements must be in seconds (s) or meters (m).

Now calculate the distance by separating D by itself.

D= (-5377.7778/ -64)\s

= 84.03 ft

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The displacement of the object that accelerates uniformly from rest is 35.25 m due East.

Displacement can be defined as distance in a specified direction.

To calculate the displacement of the object, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the displacement of the body is 35.25 m due East.

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Space telescopes have the advantage of being above the blurring effects of the Earth's atmosphere.

A surrounding is a layer of fuel or layers of gases that envelop a planet and is held in a region through the gravity of the planetary frame. A planet retains its surroundings whilst the gravity is exceptional and the temperature of the surroundings is low. A stellar ecosystem is the outer area of a celeb, which includes the layers above the opaque photosphere; stars of low temperature may have outer atmospheres containing compound molecules.

The atmosphere of Earth consists of nitrogen (78%), oxygen (21%), argon (0.9%), carbon dioxide (0.04%), and trace gases. most organisms use oxygen for breathing; lightning and bacteria perform nitrogen fixation to provide ammonia that is used to make nucleotides and amino acids; flora, algae, and cyanobacteria use carbon dioxide for photosynthesis.

The layered composition of the ecosystem minimizes the damaging results of daylight, ultraviolet radiation, solar wind, and cosmic rays to defend organisms from genetic harm. The modern composition of the atmosphere of the Earth is made from billions of years of biochemical modification of the paleo atmosphere by residing organisms.

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Answer:

Below

Explanation:

Here is a way:

When the ball reaches its maximum height , it is 1/2 of the way back to your hand AND its velocity = 0     Find this time and double it to get to your hand.

Vf = vo - at

0 = 30 - 9.81(t)    shows to to max height = 3.06 seconds

                                double it : = 6.12 seconds

The speed immediately after stopping the ball is 0.049 m/s.

Velocity is the directional speed of a moving object as an indication of its rate of change in location as perceived from a specific frame of reference and measured by a specific time standard.

Given,

The mass of ball m = 140 g = 0.140 kg.

The speed of ball u = 23 m/s.

We must determine the speed at which the ballplayer is at the peak of his leap. They will remain together. Allow them to move at the speed of V.

Allow a 65-kilogram baseball player to jump straight up to catch a hard-hit ball. Then, according to linear momentum conservation.

mu+ Mu'=(m+ M)V

In this case, u' represents the player's initial speed. Because the player was initially at rest, u' = 0.

(0.140×23)+(65×0)=(0.140+65)V

V=(0.140×23)/(0.140+65)

V=3.22/65.14

V=0.0494

Therefore, the speed immediately after stopping the ball is 0.049 m/s.

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Brownlee Heat Exchange Anomaly -Greenhouse Effect. when heat cannot escape into space.

The greenhouse effect is a process that occurs when electricity from a planet's host star is going via its ecosystem and heats the planet's floor, however, greenhouse gases within the surroundings prevent some of the warmth from returning without delay to the area, ensuing in a hotter planet. Earth's natural greenhouse impact maintains the planet from having the under-freezing temperature that it would have if there have been no greenhouse gases. moreover, human-induced increases in greenhouse gases trap more amounts of warmth, inflicting the Earth to develop warmer over the years.

most gases inside the ecosystem are transparent to infrared, however, the small share of the surroundings that constitutes greenhouse gases absorbs some of the heat emitted through the floor rather than letting it get away into space. those greenhouse gas molecules then emit radiant heat in all instructions, passing warmness to the surrounding air and warming different greenhouse gas molecules.

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The resultant density of the sphere when its radius is halved is eight times the initial density of the sphere.

Let the radius of the sphere = r

The volume of the sphere = [tex]\frac{4}{3} \pi r^{3}[/tex]

Mass of the sphere = M

Now, The density of the sphere = D = Mass/Volume

So, The density will be,

[tex]D = \frac{M}{\frac{4}{3} \pi r^{3} } = \frac{3M}{4\pi r^{3} }[/tex]

It is given that the radius of the sphere is halved, then

[tex]D' = \frac{M}{\frac{4}{3} \pi (\frac{r}{2} )^{3} } = \frac{24M}{4\pi r^{3} } = \frac{6M}{\pi r^{3} }[/tex]

Now, Dividing  both the densities, D and D', we get

[tex]\frac{D}{D'} = \frac{1}{8}\\ \\D' = 8D[/tex]

Hence, The resultant density of the sphere when its radius is halved is eight times the initial density of the sphere.

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If he covers a distance of 10 meters, the work he has done on the javelin is 0 joule.

In physics, it measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. In its simplest form, for a constant force aligned with the direction of motion, it equals the product of the force strength and the distance traveled.

How to determine the work he has done on the javelin?

The actual formula of finding the work is

W = F × S cos a, a is the angle in which the athlete is carrying the javelin.

or, W = 5 × 10 cos90, angle is 90 with the vertical component of the force (because the force of 5N that the athlete is applying to the javelin can't possibly be in the direction that he and the javelin are moving, otherwise the javelin would be accelerating)

cos 90 = 0

therefore 5*10*0=0,

Hence work done in joules is 0 joules.

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Answer:

5.8km=5800m

Explanation:

You have to convert kilometres into metres

Answer:

It's 5,800 meters

Explanation:

In the question the distance has been already given, what's required is converting it from Kilometers to Meters. This means you will need to multiply 5.8 by 1000 to get your answer.

The wind turbine gives maximize its output when a turbine having longer blades.

Wind turbines :

A wind turbine is a device that uses the wind's kinetic energy to create electricity.

Three things should be taken into account when determining value:

(1) Installation fees

(2) projected annual power output

(3) assurance regarding the projected yearly power production

The wind turbine gives maximize its output when a turbine having longer blades.

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The ball rises up to 30.625 m high.

The force that pulls items toward the centre of a planet or other entity is called gravity. All of the planets are kept in orbit around the sun by gravity.

Given parameters:

Horizontal range of the ball; R = 84 m.

Time of flight of the ball: T = 5 s.

Acceleration due to gravity; g = 9.8 m/s².

We have to find, maximum height obtained by the ball; H = ?

In projectile motion, time of flight is; T = 2usinθ/g

Where, u = initial velocity of the ball and θ = angle of projection.

So, 2usinθ/g = 5

⇒ usinθ = 5g/2 = (5×9.8)/2m/s = 24.5 m/s.

Then maximum height obtained by the ball;

H = u²sin²θ/2g

= 24.5²/(2×9.8) = 30.625 m.

Hence,  maximum height obtained by the ball is 30.625 m.

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He need to know in order to calculate the velocity of the waves is time.

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.

Uniform motion an object is said to have uniform motion when object cover equal distance in equal interval of time within exact fixed direction. For a body in uniform motion, the magnitude of its velocity remains constant over time.

Given in the question,

Velocity =Distance /Time

He need to know in order to calculate the velocity of the waves is time.

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The listed characteristics of storms are sorted according to whether they are associated with Jovian storms only, terrestrial storms only, or both Jovian and terrestrial storms.

The terrestrial planets are the planets of inner solar system such as Mercury, Venus, Earth and Mars. Unlike terrestrial planets Jovian planets do not have a solid surface. They are primarily composed of hydrogen and helium in their atmosphere.

Therefore, the listed characteristics of storms are sorted according to whether they are associated with Jovian storms only, terrestrial storms only, or both Jovian and terrestrial storms.

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The velocity of the aircraft to move over the upper surface to create the ideal lift is  67.64 m/s.

Describe Bernoulli's principle?

Because of Bernoulli's principle, which states that when air speeds up, pressure decreases, airplanes are able to fly. Thus, the reason a wing produces lift is because the air moves faster over the top, resulting in a region of low pressure and lift.

The ideal lift is determined by the fluid density and velocity relationship, so:

F_lift = 1/2 x p x A x (v_f^2 - v_i^2)

As a result, the fluid's density may be calculated.

p = 1.29 kg / m^3

The situation's environment indicates that the wings generate roughly 100N of lift per square meter of wings, therefore

A = 1 m^2

the beginning speed is

v_i = 55.0 m/s

Replacing

F_lift = 1/2 x 1.29 x 1 x (v_f^2 - 55 x 55)

1000 = 0.645 x (v_f^2 - 3025)

1550.387 =  (v_f^2 - 3025)

v_f^2 = 4575.387

v_f = 67.64 m/s.

Hence, the velocity of the aircraft to move over the upper surface to create the ideal lift is  67.64 m/s.

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The magnitude of the acceleration of the robot is  1 m/s².

Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.

Calculation:-

mass of doll = 0.20 kg

mass of robot = 0.30 kg

Force on dall by robot = 0.30 N

acceleration on doll = mass of doll / force of robot

                                = 0.20 / 0.30

                                = 0.67 m/s²

Same force applied to the robot by Newton's third law of motion = 0.30 N

acceleration of the robot = mass of robot/force

                                         = 0.30 / 0.30

                                         = 1 m/s²

Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.

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The Impulse is - 74 Ns

Impulse (symbolized by J or Imp) is the integral of a force, F, over the time interval, t, for which it acts.

The SI unit of impulse is the newton second (N⋅s)

Examples of impluse in real life could include hitting a ball,tossing a coin, kick starting scooter etc.

The values known to us are -

J =?

Mass (m) = 74 kg

Initial velocity (Vi) = 4 m/s

Final velocity (Vf) = 3 m/s

To find Impulse-

J = ΔP = m ( Vi-Vf)

J = 74kg ( 3m/s- 4m/s)

J = - 74 Ns

The impulse is -74Ns, here the negative sign indicates the direction of impulse, in the opposite direction of motion.

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According to Newton's first law, an object will accelerate at a constant rate if its net force is zero. The calculated value is 39.2 N

This indicates that the velocity is constant but does not necessarily imply that the item is at rest.

F = m a

= 4 kg x 2.5 m/s/s x 10 N, correct.

The formula for Fgrav is:

Fgrav = m • g

= 4 kg • 9.8 m/s/s

= 39.2 N since the mass is known.

The normal force is equivalent to the gravitational force since there is no vertical acceleration. A force in physics is any interaction that, if left unchecked, will alter an object's motion. An object with mass can change its velocity due to a force, which includes starting to move from a state,

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Answer: 980 Newtons

Explanation:

Consider two masses in a closed system. The Newton 3rd law, F₁₂ = -F₂₁, will result in conservation of momentum m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂.

Suppose we have two masses, m₁ and m₂. According to the Newton's 3rd Law:

F₁₂ = -F₂₁

Where:

F₁₂ = force on m₁  due to m₂

F₂₁ = force on m₂  due to m₁

If there is collision between two masses, we can assume that the forces acted in the same time interval. Hence,

F₁₂ . t = -F₂₁ . t

Force is defined as the change of momentum (Δp) over time (t), or

F = Δp / t

Substitute F . t = Δp on both sides,

Δp₁ = –Δp₂

p₁_final - p₁_initial =  –(p₂_final - p₂_initial)

p₁_initial + p₂_initial = p₁_final + p₂_final

This is the conservation law of momentum.

Let:

u = initial velocity

v = final velocity

Then,

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

This is another form of  the conservation law of momentum. Hence, we have shown that the Newton 3rd Law will lead to the conservation of momentum.

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Answer:

The answer is - 480 kj

Explanation:

kinetic energy before: K1 = 1/2 *m*U1^2=} K1= 1/2*120*4.5^2=} K1= 60*4.5*4.5=} K1= 1,215 kj

kinetic energy after : K2=1/2 *m*U2^2=} K2= 1/2*120*3.5*3.5=} K2= 735 kj

if you want to find the kinetic energy that the mass has lost you need to do : K2-K1= 735-1.215= - 480 kj

The ruler placement hypothesis can be summed up as follows:

The set of points on the line and the set of real numbers are equivalent in every way, and the absolute value of the difference between the matching numbers is equal to the distance between two points.

According to this, a set of points on a line can be matched with a set of real numbers, and vice versa. In order to help you better understand the ruler placement postulate, a general overview is provided based on the fact that your question is incomplete.

A ruler is a tool or measuring device that is used to measure length and draw straight lines. A measure is used to determine the length in both measured and conventional units.

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Answer:

Explanation:

Given:

m = 9 kg

F = 450 N

_________

a - ?

According to Newton's 2nd law:

a = F / m

a = 450 / 9 = 50 m/s²

If a direct current of 5 Volts, goes through a primary coil, the voltage in the secondary coil will be double is the false statement.

The voltage across the secondary coil is greater than the voltage across the primary. There are fewer turns on the secondary coil than the primary.

The output power is greater than the input power. The current in the secondary coil is greater than the current in the primary coil.

The secondary voltage of a transformer may be either in phase or out of phase with the primary voltage. This depends on the direction in which the windings are wound and the arrangement of the connections to the external circuit.

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The force implemented at the rod is  P=zero.25lb P = zero.25 l b. the burden of the rod is  w=1.75lb w = 1. seventy-five lb. The kinematic diagram of the rod.

Friction is any point in the consumer's journey with an organization wherein they hit a snag that slows them down or causes dissatisfaction. in the most primary concept, offering frictionless customer support way tracking the consumer adventure and improving the consumer revel in.

The overwhelming consensus is that ice has low friction because of a skinny film of liquid water coating its surface. for this reason, skaters balanced on skinny steel blades can float easily throughout the ice rink, but grind to a halt at the timber ground beyond.

Motion is certainly viable without friction even though an item is stationary in a single reference frame, in some other reference body shifting with admire the first, that identical object may be seen to be transferring. So movement actually does not need friction at all.

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The overall magnification of the microscope is - 570.687.

A microscope is a laboratory tool used to have a look at items which can be too small to be seen with the aid of the bare eye. Microscopy is the technology of investigating small objects and structures through the use of a microscope. The microscopic approach is invisible to the attention unless aided by using a microscope.

The focal length of a microscope objective is generally between 2 mm and 40 mm. but, that parameter is regularly considered as less important, on account that magnification and numerical aperture are sufficient for quantifying the critical performance in a microscope.

Calculation:-

M = -(L/f) (near point/Fe)

M = - (0.176/0.003)(0.25/0.0257)

M = - 570.687

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The charges on B, C , and D objects are negative, positive and positive respectively.

The electroscope instrument is used to find out whether there is charge present and how much of it there is.

The leaves at the bottom of the electroscope spread apart when a charged object is brought close to the top of the instrument (for example, a positive charge). The positive charge on the leaves has gotten stronger as they diverge more.

This occurs when the charged object imparts a positive charge on the leaves. When the object is positively charged, this is possible. They move farther apart the higher the charge.

The charges on B, C , and D objects are negative, positive and positive respectively.

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