what does power mean in terms of electrical energy

The method of radiation is faster through a vacuum, the method of convection is faster through a gas and the method of conduction is faster through a solid.

There are three modes of heat transfer:

conduction

convection, and

radiation

Radiation:

The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles causes ionization. As we know vacuum does not require any medium so radiation is the heat transfer which is faster in a vacuum.

Therefore we get that in vacuum radiation, solid conduction, and gas convection heat transfer is faster.

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The distance travelled by the block of mass m will be l₀ + x or d which can be calculated through implementing the Conservation of energy from Work energy theorem

For  l₀ + x, (from figure)

sinᶿ = h / (l₀+x) ----- equation 1

We know from conservation of energy,

Ka + Ua = Kc + Uc

Here

Ka = kinetic energy at point A

Ua = potential energy at point A

Kc = kinetic energy at point C

Uc = potential energy at point C

Since the block is at rest Ka = 0 & block comes to rest after moving Kc = 0 as well

Therefore Ua = Uc

Ua = m.g.h

Uc = ½ kx²

m.g.h = ½ kx²

h = kx²/2mg ---- equation 2

Substitute the obtained value of h i.e. equation 2 in equation 1 for calculation of distance travelled by the block on an inclined plane.

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Answer:

d = (2mg sinθ) / k

Explanation:

We can use the conservation of energy.

At the point when the block comes to rest, all of its initial potential energy mgh is converted into the potential energy stored in the spring (1/2)kx², where x is the amount by which the spring is compressed.

Using trigonometry, we can see that the height h of the incline is equal to

d sinθ

where d is the distance traveled by the block down the incline.

We know this because d represents an incline and to find the y value of an incline we use sinθ

Therefore, we can write:

mgh = (1/2)kx²

Substituting h = d sinθ and solving for d, we get:

mgd sinθ = (1/2)kd²

d = (2mgsinθ)/k

Therefore, the correct answer for the distance that the block slides down the incline before coming momentarily to rest is (2mg sinθ)/k.

I hope this helped! :)

The additional power required to carry the plate at speed of 72 km/hr is 4867.8 m/s.

Given data,

[tex]l[/tex] (wide of plate) = 1.9m

[tex]h[/tex] (high of plate) = 0.5m

ρ (air density) = 1.22

[tex]V[/tex] (speed) = 72km/hr

assume [tex]C_{D}[/tex] (Drag coefficient) = 1.05

To determine the additional power can be calculated as follows:

First, we have to determine the area of plate

Area of plate = [tex]l[/tex]×[tex]h[/tex]

= 1.9×0.5

Then, we have to convert the unit of speed from km/hr to m/s

72km/hr = [tex]\frac{72000}{3600}[/tex]

= 20 m/s

Next, we can determine the power by using the formula

=[tex]\frac{1}{2}[/tex]×[tex]C_{D}[/tex]×ρ×[tex]V^{2}[/tex]×[tex]A[/tex]×[tex]V[/tex]

=[tex]\frac{1}{2}[/tex]×[tex]1.05[/tex]×[tex]1.22[/tex]×[tex]20^{2}[/tex]×[tex]0.95[/tex]×[tex]20[/tex]

=4867.8 watt

Thus, The additional power required to carry the plate at speed of 72 km/hr is 4867.8 m/s.

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Equation (8.10) provides the following form for the angular acceleration "alpha," which is proportional to the radius "rr," and the tangential acceleration "aa."

A wheel's angular acceleration is alpha = 6.0t4 - 4.0t2, where alpha is measured in radians per second squared and t is measured in seconds. The wheel has an angular position of +1.0 rad and an angular velocity of +2.0 rad/s at time t = 0.

=rα \s1: The most popular units for angular acceleration are rad/s2 and rad/s. 2 . Similar to how a + or - sign designates the direction of linear acceleration in one dimension, a + or - sign designates the direction of angular acceleration along a fixed axis.

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​

Answer:408

Explanation:

Answer:

  382.2 N

Explanation:

You want the normal force on an object weighing 437 N situated on an inclined plane 29° from the horizontal.

The vector 437 N straight down can be decomposed to vectors parallel to the plane and perpendicular to the plane. That decomposition looks like ...

  (perpendicular, parallel) = 437 N · (cos(29°), sin(29°)) ≈ (382.2, 211.9) N

The normal force on the object is about 382.2 N.

Pulleys are strong, efficient devices. They have the power to shift a force's direction, which makes it much simpler for us to move objects.

For the transmission of energy and motion, pulleys can be used alone or in conjunction. Sheaves are the name for rimmed pulleys with grooves. In a belt drive, pulleys are attached to shafts at their axes, and power is transferred between the shafts using endless belts that pass over the pulleys.

The four different types of pulleys are complex, compound, moveable, and fixed. A fixed and movable pulley make up compound pulleys.

The main benefit of using pulleys is that it requires less effort than simply lifting weights normally. To put it another way, it lessens the actual force needed to lift heavy objects. Additionally, the force's direction is altered.

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The magnitude of Mars' gravitational field is 3.66 N/kg.

The approximate acceleration due to gravity experienced by the spacecraft is 3.66 m/s².

The gravitational fields of the Mars is calculated by applying the following equation;

E = F/m = GM/r²

where;

E = (6.626 x 10⁻¹¹ x 6.39 x 10²³) / (3.4 x 10⁶)²

E = 3.66 N/kg

The approximate acceleration due to gravity experienced by the spacecraft is calculated as follows;

F = mg = GmM/r²

g = GM/r²

where;

g = (6.626 x 10⁻¹¹ x 6.39 x 10²³) / (3.4 x 10⁶)²

g = 3.66 m/s²

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1000 kg is the mass of the ball.

To find the volume of a substance, divide its mass by its density (mass/density = volume). Consistent measurement units should always be used. If the density is specified in grams per cubic centimeter, for instance, then calculate the mass in grams and provide the volume in cubic centimeters.

From mass and volume measurements, the densities of brass and aluminum will be determined. Three different methods will be used to calculate volumes: geometrically (by measuring lengths); via water displacement; and via pycnometry.

The density calculation formula is p = m/V.

m = p*v

m = 100kg

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The speed with which the rock A, B and C  which are thrown same initial speed and same mass hit the ground is equal for all the rocks.

Let us consider the initial velocity be 1 m / s and the height of the cliff to be 10 m.

For the rock A which is thrown vertically downward,

v² = u² + 2 a s

v² = 1 + ( 2 * 9.8 * 10 )

v² = 197 m / s

v = 14 m / s

For rock B which is thrown horizontally,

vx = 1 m / s

v² = u² + 2 a s

v² = 0 + ( 2 * 9.8 * 10 )

v = 14 m / s

vy = 14 m / s

v = √ vx² + vy²

v = √ 1 + 14²

v = √ 197

v = 14 m / s

As we can see here all rocks start with same gravitational potential energy and end with same gravitational energy. So all rocks have equal velocity and kinetic energy, and so energy is conserved. So they all hit the ground with same speed.

Therefore, they all hit the ground with the same speed.

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The reason for the first graph is because of the effects of deceleration and acceleration due to gravity while the arrangements of the graphs are; B> D > A> C.

When we plot a graph, the graph would always have to axes; the vertical axis and the horizontal axis. In this case, the vertical axis is the position and the horizontal axis is the time. The slope of this graph speaks of the displacement of the object.

Looking at the first graph, we can see that it can be able to show the motion of an object that went up and fell down as the speed of the object would decrease during the upward motion as it is decelerated due to gravity and comes to a halt at the maximum height before it is accelerated as it moves downwards.

From the graphs, the ranking of the displacements for the second set of graphs as; B> D > A> C. This is because there is a positive slope in B and D while the slope in A is zero and that in C is negative.

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According to the nebular hypothesis, small terrestrial planets are formed through the process of accretion, in which dense solid particles condensed and collided with one another as a result of their mutual gravitational pull.

As opposed to this, all heavier elements condensed near the sun and formed terrestrial planets, while lighter elements moved away from the sun and formed jovian planets due to the high temperature near the sun, which only allowed heavier particles to condense there.

The solar nebular hypothesis is the explanation put forth and accepted by most scientists as to how the earth came to be. It claims that a nebular, or huge clump of dust, is where the solar system originated. The heavier materials that could resist higher temperatures formed closer to the sun as the condensation of the nebular continued. Because these minerals weren't abundant, the planets they generated weren't very big.

The Jovian planets, on the other hand, formed above the frost line and could support icy compounds. These planets' larger sizes can be attributed to the abundance of ices that formed them. The lighter hydrogen and helium elements were stripped away by solar winds, which caused their accumulation far from the sun.

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Neither. The glass without the ice cube has some weight with the glass with the ice cube.

We hаve аn ice cube of mаss m floаting in the wаter. If it is floаting (in equilibrium), it will hаve to displаce enough wаter to support its weight. How much is thаt? It is just Volume = m/d, where m is the mаss of the ice cube, аnd d is the density of wаter.

Where the ice hаs melted, it turns into a wаter of volume. Volume = m/d exаctly the sаme volume аs it displаced before. So the аdded volume is the sаme, so the level of the wаter will not chаnge.

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Answer:

1. It will reach a height of 31.877m

2. 5.102 seconds

3. -11.456 m/s

Explanation:

Mass of to object is 3 kg and 2 kg.

What is Gravitational force?

In mechanics, gravity, often known as gravitation, is the universal force of attraction that acts between all matter. It is by far the weakest known natural force and so has no effect on the internal properties of ordinary stuff. Due to its long reach and ubiquitous action, it influences the trajectories of bodies in the solar system and elsewhere in the universe, as well as the architecture and evolution of stars, galaxies, and the entire cosmos. The weight, or downward force of gravity, exerted by the Earth's mass on all bodies on Earth is proportional to their mass. The acceleration that freely falling objects experience is used to calculate gravity.

F =G(m1m2/r2)

m1m2 = [(1.00 X 10-8N)(20*10-2m)2]

/[6.67*10-11Nm2/kg2]

Now

m1-m2 =[(m1+m2)2-4m1m2] =[(5kg)2-4(6kg2)] =(1kg2) = 1kg 2m1 =

(m1+m2)+(m1-m2) = 5kg + 1kg =6kg

m1 = 3kg, m2 = 5kg,

and

m2 = 5kg - 3kg = 2kg

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The acceleration will be 0.35 m/s^2 if he pulls with the same force when the wagon contains a child weighing 3 times of wagon.

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Answer:

Explanation:

And what to find in the problem?

Answer:

Explanation:

 Given:

H = 3.6 m

V = 0 m/s

g = 9.8 m/s²

_________

V₀ - ?

Potential energy = m·g·H

Kinetic energy = m·V₀² / 2

Let's equate:

m·V₀² / 2 = m·g·H

V₀² / 2 = g·H

Starting speed:

V₀ = √ ( 2·g·H )

V₀ = √ (2·9.8·3.6) ≈ 8.4 m/s

Answer:

100

Explanation:

The wire must be cut at a length of l/5 along its length so that the resistance of one piece is four times the resistance of other.

The relation between the resistance the resistivity the area and the length of the wire is given by,

R = pl/A

p is resistivity,

A is the area,

l is the length of the wire.

Let us say that the peace of length X is cut from the wire,

So, length of one piece is x and of the other is (l-x)

The resistance of the bigger price has to be four times of the other.

So, we can write,

px/A = 4p(l-x)/A

x = 4l-4x

5x = l

x = l/5.

So, the wire should be cut at a point l/5 from one of the ends of the wire.

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electric force would a proton experience at the same point is .156 × 10⁻¹⁹ N/C.

Electric field :

The electric field is the amount of electric force per charge, and the electric force on a charge at a given point in space is the amount of charge multiplied by the electric field at that location.

E = F/q

where,

E = electric field

F = force

q = charge

A force experienced by an alpha particle = 0.250N

E = F/q

E =  0.250 /1.6 × 10⁻¹⁹

E = 0.156 × 10⁻¹⁹ N/C

electric force would a proton experience at the same point is .156 × 10⁻¹⁹ N/C.

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The speed of the longitudinal wave is 1.584 or approximately 1.6 meters per second.

Longitudinal waves are waves in which the medium's vibration is parallel to the wave's travel direction and the medium's displacement is in the same direction as the wave's propagation.

Sound waves are one example of longitudinal waves. Waves of ultrasound P-waves from earthquakes

A longitudinal wave's key features include compression, rarefaction, wavelength, amplitude, period, and frequency.

To calculate the above answer multiply wavelength by frequency to get the speed of a wave.

That is:

2.4 x 0.66

= 1.584

Where the frequency is not given beforehand, you can divide 6 crests by 9.1 seconds to determine the frequency.

Hence, the speed of the longitudinal wave is 1.584 which is approximately 1.6.

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Answer: 20

Explanation: Because if you divide the astronauts weight by 10.

Answer: Electrical Conductors

Explanation: Electrical conductors allow electric current to flow easily because of the make up of their atoms. In a conductor, the outer electrons of the atom are loosely bound and can freely move through the material when an electric charge is applied. In general, the best electrical conductors are metals.

The magnitude of the net force on the proton is 0.

An object with zero net force will either remain stationary if initially stationary or maintain a constant velocity.

Fₙ = F₁ - F₂

Fₙ = Net force

F₁  and F₂ are applied forces

Now, F = ma

0 = ma

a = 0

Since acceleration is zero this implies that the object is moving with a constant velocity.

For the given case,

The proton is moving with a constant velocity along the y direction, which means the acceleration is zero. So, the net force is:

Fₙ = ma

Fₙ = m × 0

Fₙ = 0

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Flow doesn't depends on absolute values of P1 and P2

Flow doesn't depends on absolute values of P1 and P2 but flow depends on pressure difference between top and bottom of each sides. This conclude that whenever  { P2-P4 = P1-P3 } flow will be stop.

after some time, difference in pressure across either components is

{  P​​​​​​(Top) - P​​​​(bottom) }

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The resistance of the light bulb has the power of 40 W is 722.5 ohms

The power of the light bulb = 40 W

The maximum voltage of the lightbulb = 170 V

Therefore, the resistance of the light bulb can be found using the formula,

                        P = V² / R

where P is the power of the lightbulb

           V is the voltage of the lightbulb

           R is the resistance of the lightbulb.

Let us re-write the above equation in order to get the value of the resistance,

                    R = V² / P

Let us substitute the known values in the above equation, we get

                   R = (170)² / 40

                      = 28,900 / 40

                      = 722. 5 ohm

Therefore, the resistance of the light bulb is 722.5 ohms.

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Electrical energy is converted into the kinetic energy of the spinning fan and the thermal energy of the heated coils within a hair dryer when the appliance is turned on.

Electrical energy is the capacity of the charged particles in an atom to start an action or move an object. The movement of electrons between atoms results in the production of electrical energy.

Every time you plug your toaster and phone charger into a wall socket, electrical energy is used to power them. Electric eels, batteries, and lightning are additional sources of this kind of power. However, electrical energy can also be converted into other types of energy, such as the thermal energy that warms your toaster and toasts your bread, or the mechanical energy that drives the acceleration of an electric car.

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The average momentum of the avalanche was found to be 1.3×10^ 9 kg·m/s

what is momentum?

Momentum is the pace at which a security's price accelerates—that is, the rate at which the price changes. Momentum trading is a method that uses momentum to enter a trend while it is gaining traction.

Simply expressed, momentum is the tendency of a price trend to continue growing or dropping for a set period of time, taking into consideration both price and volume data. Momentum is commonly quantified using an oscillator in technical analysis and used to help detect trends.

Momentum is the quantity of motion of an item. If you know the object's velocity and mass, you can calculate its momentum. It will be simple once you understand the formula.

The average momentum of the above problem was 1.3 x 10^9Kg.m/s

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Any point in the wire has 1.12 x [tex]10^{19}[/tex]. electrons flow per second.

The current is the quantity of charge Q flowing through a certain point of the wire in a time interval of [tex]\Delta t[/tex].

I = [tex]\frac{Q}{\Delta t}[/tex].

by using this relationship

I=1.80 A, we can find the charge passing any point in the wire in 1 second:

Electric Charge, Q = 1.80 C.

To find how many electrons corresponds to this charge, we should divide this value by the charge of a single electron

charge of the electron = 1.6 x [tex]10^{-19}[/tex] C.

No. of Electrons = Q/q = [tex]\frac{1.80}{1.6* 10^{-19}}[/tex]= 1.12 x [tex]10^{19}[/tex].

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