In all the cases shown below the velocity vector, v1 and v2 have the same length

A person shakes a sealed, insulated bottle containing coffee for a few minutes, then the change in the temperature of the coffee increases slightly.

The temperature of the coffee increases when insulated bottle is sealed and shaken because the exchange of heat from the surrounding from the thermos bottle is zero. From the first law of thermodynamics, the work done on system is equal to the change in internal energy.

As thermos flask is insulated, therefore no heat energy is added to the system,

Therefore, △Q=0

Work is done  by shaking it against viscous force.

Now, △w=−ve

Internal energy , △U=△Q−△w=0−(−△w)

△U=+△w

So, △U=+ve

Hence, temperature of the system increases due to the increase in internal energy.

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With wavelengths of around 10-1000 m, radio waves used by cell phones to communicate with cell towers are far too big to be ionizing. In reality, WiFi runs at very specific frequencies, 2.4 GHz or 5 GHz, which correspond to wavelengths of 12 cm or 6 cm, respectively.

Since radiofrequency waves are electromagnetic fields rather than ionizing radiation like X-rays or gamma rays, they cannot ionize or destroy chemical bonds in living organisms.

The signal is transformed back into the data that was first sent by the transmitter when the radio waves reach a receiver. Your voice is sent through radio waves to the person you are contacting when you use a cell phone as a transmitter.

The primary means of communication between mobile phones and neighboring cell towers is through RF waves, an electromagnetic spectrum energy type.

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The initial speed of car A is 15.18 m/s.

Momentum is defined as mass in motion. If there are two objects (the two objects in motion or only one object in motion and the other in stationary) that collide and no other forces work in the system, the law of momentum conservation applies in the system.

p=p'

pa+pb = pa'+pb'

(ma×va) + (mb×vb) = (ma×va') + (mb×vb')

(ma×va) + (mb×vb) = (ma×va') + (mb×vb')

(1,783×va) + (1,600×0) = (1,783×8) + (1,600×8)

(1,783×va) + 0 = 14,264+12,800

(1,783×va) = 27,064

[tex]va \:=\: \frac{27,064}{1.783}[/tex]

va = 15.18 m/s

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Answer: thermal energy, density

Explanation:

The relationship of kinetic energy is that when mass increases or velocity increases, kinetic energy will increase also.

Kinetic energy equals half of the product of mass and the square of the velocity. Kinetic energy is the energy that occurs when the body is in motion. The unit of kinetic energy is joule (J). The kinetic energy increases with an increase in mass and the square of velocity.

The kinetic energy also increases with an increase in the thermal energy of the particles. When the temperature increases, the average kinetic energy also increases and hence, the thermal energy of the molecules also increases. The kinetic energy increases with the decrease in density or volume of the object.

Hence, Kinetic energy increases with an increase in the mass of the object and the velocity of the object.

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The wavelength of an electron is 215.5nm.

A description of the de Broglie wavelength is as follows:

The formula for wavelength is = h/mv, where h stands for Planck's constant, m for mass, and v for velocity.

The equation p = h/λ, where h is the Planck constant and is the wavelength, expresses the De Broglie relation, which states that there is a correlation between an electron's wavelength and momentum.

The wavelength of a wave is the distance between its two subsequent crests or troughs.

h = 6.62607015 × 10⁻³⁴ joule second.

m =9.11 x 10 ⁻³¹Kg

v = 2.963 x 10⁶m/s

λ = h / ( mv)

λ = 6.62607015 × 10⁻³⁴/9.11 x 10 ⁻³¹×2.963 x 10⁶

λ = 2.155×10⁻⁷

λ = 215.5nm.

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The number of poles that the two machines should have in order to convert a 50-hz power to 60-hz is a 10 pole synchronous motor must be coupled to a 12-pole synchronous generator.

n = 120 f / P

n = Speed of synchronous machine

f = Frequency

P = Number of poles

For motor,

f = 50 Hz

n = 120 * 50 / Pm

For generator,

f = 60 Hz

n = 120 * 60 / Pg

To accomplish the frequency conversion, the speed of the motor and generator must be equal. So,

120 * 50 / Pm = 120 * 60 / Pg

Pg / Pm = 6 / 5

Pg / Pm = 12 / 10

Therefore, to accomplish the frequency conversion, a 10 pole synchronous motor must be coupled to a 12 pole synchronous generator.

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The force does the ring push on her at the top of the ride is 489.37N.

When an object with mass is pushed or pulled, it changes its velocity, according to the definition of force.

Given,

Ring rotates (T) = 5.50 s

Mass m= 51.0 kg

The velocity will now be determined as,

V = 2πr/T

V = 2π8/5.50

V = 50.54/5.50

V = 50.54/5.50

V = 9.134m/s.

By bringing the forces into balance,

N = mv²/R - mg

N = m (v²/R - g)

N = 51(9.134²/8 - 9.8)

N = 51(83.42/8 -9.8)

N = 489.37N

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A proton and electron separated by 1.0 x 10-10 meters exert 1.0 x 10-47N of gravitational force on each other.

The gravitational force will bring together any two mass-containing objects. The gravitational force is described as attracting because it consistently tries to draw masses together and never tries to push them apart. In reality, you and every other item in the universe are pulling toward one another.

What is the origin of gravity?

All of the mass on Earth is what creates gravity. The cumulative gravitational attraction of all of its mass exerts pressure on all of the body's mass. Your weight is determined by that. Furthermore, your weight would be lower if you were on a planet with a lower mass than Earth.

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At 300,000 km/s, radio waves move at the speed of light. At 100 megahertz, a radio wave has a wavelength of 3.0 m.

The space between two successive troughs or peaks of the light wave is referred to as the wavelength of light. The Greek letter lambda (), which stands for it. Consequently, the wavelength is the separation between one wave's crest or trough and the following wave.

An electromagnetic wave's wavelength has no bearing on how quickly it moves. There is no difference in the speed of Wave C versus Wave D. Changes in the characteristics of the medium a wave travels through are the only things that can change its speed.

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Option A - the time interval between the first P-wave and first S-wave arrivals is correct.

Determine the difference between the first P-wave and the first S-arrival wave's periods, and then use that information to calculate the distance of the epicenter from the seismic recording station.

The study of elastic wave motion through the ground is known as seismology. Seismology of earthquakes is the finest method for investigating the earth's core. A portion of the energy released after an explosion or earthquake is transported through the earth as elastic waves. Stresses increase in the crust as the lithospheric plates of the Earth continue their sluggish motion, particularly close to the plate borders. Compression, tension, and shear stresses increase in the crust until they exceed the resistance of the rock or the friction along an existing fault. Then, an abrupt rock slide along a fault happens. The rocks lurch to their new location in a matter of seconds, and the ground trembles as the stress energy is released. Similar to growing ripples from a pebble thrown in still water, seismic waves propagate outward from the area of the fault that ruptured.

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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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A full moon is currently visible in the sky across from our sun.

What is a new full moon?

Half of the moon is visible to us, and the other half is not lit by sunlight until around a week after the new moon. We observe the moon in this phase, sometimes referred to as the first quarter moon, around a week following the new moon.

What is waxing gibbous?

The waxing crescent and illuminated first-quarter moon are visible to the west. Since "gibbous" means "swollen" or "humpbacked," the moon phase that follows the first quarter moon is known as the "waxing gibbous moon." And indeed, it does appear as though the moon is slightly swollen or developing a small hump. You should be aware that the word "waxing" is a synonym for "increasing," which will aid you in remembering that during the waxing phase, we see more and more of the moon every night.

Therefore, the moon currently visible in the sky is a full moon.

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When the energy in a system is transformed, the total amount of energy in the system is always conserved.

The changing of one form of energy into another, or the movement of energy from one place to another. An energy transformation is a change of power from one form to another. Fire (Chemical energy Heat and Light) Electric lamp (Electrical energy Heat and Light), Microphone (Sound Electrical energy), Wave power (Mechanical energy Electrical energy). Energy transformation is also known as energy regeneration which is a process of changing energy from one form to another. Energy transformations are procedures that convert energy from one type, for example, kinetic, gravitational potential, and chemical energy.

So we can conclude that an energy transformation is the change of energy from one form to another.

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Answer:

It is likely water

Explanation:

Due to an average medium PH level it doesn't dissolve much.

Answer:

Explanation:

Given:

m₁ = 90.0 gram = 0.090 kg

L₁ = 75 cm = 0.75 m

L₂ = 45 cm = 0.45 m

__________________

m₂ - ?

Lever balance (rule of moments):

M₁ = M₂

F₁·L₁  = F₂·L₂

m₁·g·L₁  = m₂·g·L₂

m₁·L₁  = m₂·L₂

Mass:

m₂ = m₁·L₁ / L₂

m₂ = 0.090·0.75 / 0.45 = 0.150 kg    or   150 gram

The acceleration of an object is moving in a circle at constant speed is just constant (or constant in magnitude). It is not constant in direction nor constantly increasing.

Acceleration in physics is defined to be the rate of change of the velocity of an object with respect to time. Acceleration, including centripetal acceleration, is a vector quantity because it has magnitude as well as direction. Objects that are changing speeds or changing directions (or changing both) are said to be accelerating.

Centripetal acceleration is the acceleration of a body traversing a circular path. It is equal to velocity squared over radius. Since an object traveling on a circular path is constantly changing directions, even at constant speed, the object is accelerating as well.

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1.0c. Light will always propagate through a vacuum at the speed of light “c”.

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Using the concepts of moment of inertia, we got that moment of inertia increases by 4  times for all round object (sphere, disk, hoop for example) on doubling only the radius.

We know very well that, moment of inertia of the following object are

where m is the mass of the object and r is the radius of the object.

We see that moment of inertia is directly proportional to the radius of the object.

It means when we double the radius, then moment of inertia increases by 4 times of its previous value.

Hence, a round object (sphere, disk, hoop for example), doubling only the radius of the object changes its moment inertia by a factor of 4 times.

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This can be calculated by using motion equations, The distance covered on the runway before coming to rest

Initial speed is 180 km/hr = 50 m/s

time took to come to rest is = 30 sec

so we can write, here we are assuming that there is no frictional force is applied externally or internally to the system.

u = 50 m/s

v = 0 m/s

t = 30 s

we know that distance travelled = x

so, x =

putting the appropriate values, we get that

x = [tex](\frac{50+0}{2} ) 30[/tex]

x = 750 m

Hence the distance travelled before coming to rest is 750 m.

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To learn the viscosity and speed and resistance to calculate the diameter.

What is viscosity?

Viscosity is a fluid's (liquid or gas) resistance to a change in shape or motion of adjacent parts concerning one another. Viscosity indicates resistance to flow.

What constitutes speed?

The speed of a change in an object's position in any direction Speed is defined as the ratio of distance to the amount of time it takes to cover that distance. Since speed has only a direction and no magnitude, it is a scalar quantity.

Resistance AC circuit

in resistance AC circuit the voltage and current are related as,

Emf; E= EoSinωt

where, I_O=E_O/R

In purely resistive circuit, there is no phase change occurs. the phase angle between voltage and current is zero.

the maximum value of current is I_0 =v_0\R

if tha maximum volatge v_0 is increase with decrease of resistance R then current in the circuit will maximum and denoted asI_0

capacitive AC circuit

In capacitive AC circuit the voltage and current are related as,

Emf: E=E_Osinωt

and current I =I_Osinωt

⇒ I =I _0sin(ωt+π/2)

where,I_0 =E_0/X_C

in purely capacitive circuit, current leads the end by phase of π/2. the phase angle between volatge and current is π\2

The maximum value of current is,I_0 =E_0\X_C

if the maximum voltage E_0 is increases with decreases of capacitive X_c then current in the circuit will maxmium and denoted as I_0

when the emf is zero then current is maximum magnitude.so the current is maxmium before it leads or lag in the circuit.

inductive AC circuit:

Inductive AC circuit the voltage and current are related as

Emf: E= E_0sinωt

And current : I= (-)I_0cosωt

⇒ I= I_0sin(ωt -π/2)

where, Iπ_0 =E_0/X_L and x=∈L

In purely inductive circuit, the current lags behind the voltage (emf) by phase of π/2. The phase angle between volatge and current is π/2

The maximum value of current is, I_0 = E_0/X_L

if the maximum voltage E_0 is increase with decrease of inductive resistance X_L then current in the circuit will maximum and denoted is I_0.

Therefore, the emf is zero then current is maximum magnitude. so the current is maximum before it leads or lag in the circuit.

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The time period of the wave is 2.5 seconds. Option C

How is the duration of a wave defined?

Since frequency and wave period are inversely proportional, the wave period can be calculated using the following formula:

                                                  T = 1/f

                                                  T = λ /v

where T is the time period in seconds, f is the wave frequency, is the wavelength in meters, and v is the speed in meters per second.

Time is divided into periods by the quantity of oscillations. Two oscillations are shown in the diagram. By counting the wave's crests one by one starting at the 0s point, this may be seen. Two oscillations end in five seconds. 2 divided by 5 equals 2.5 seconds.

Hence, Option c) 2.5 is correct.

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The radius of curvature of the bend 53.33 m N

centripetal acceleration of 40.0 m/s2 and  speed of 30 m/s

[tex]f = \frac{mv^{2} }{R}[/tex]

so

40.0 m/s2 / 30 m/s

[tex]\frac{40^{2}m }{30}[/tex]  = 53.33  m N

The radius of curvature of the bend 53.33  m N

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8.2 X [tex]10^{5}[/tex]C quantity of charge is supplied by the battery to charge the capacitors.

[tex]C_{net } = \frac{C_{1} C_{2} }{C_{1} +C_{2} }[/tex]

       = [tex]\frac{3\times 4}{3+4}[/tex]

     = 12/17

    = 1.714μ F

Q = CV

     = 1.714x [tex]10^{6}[/tex] F X 48V

     = 82.27x [tex]10^{6}[/tex]C

     = 8.2 X [tex]10^{5}[/tex]C

A two-terminal electrical device known as a capacitor is capable of storing energy in the form of an electric charge. It is made up of two electrical wires that are spaced apart by a certain amount. Suction may be used to fill the space between the conductors, or a dielectric, an insulating substance, may be used instead. Capacitance is the term used to describe a capacitor's capacity to hold charges.

Pairs of opposing charges are held apart in capacitors to retain energy. A parallel plate capacitor has the most basic construction and is made up of two metal plates with a space in between them. However, many capacitor types are produced in a wide variety of shapes, sizes, lengths, girths, and materials.

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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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First Quarter phase is the moon in when it rises around noon.

During the first quarter phase, the western half of the Moon is illuminated to resemble the letter "D." The Moon rises at noon that day and sets at midnight. When the Moon is in its waxing gibbous phase, it is mostly bright, and the illuminated area is egg-shaped (gibbous), with the eastern edge shadowed.

Lunar phases are the many phases of the moon. The sun's light is reflected by the moon, which does not produce any light of its own. New moons occur when the distant side of the moon is illuminated by sunlight. A new moon is visible when it reflects from a side that is close to it.

The moon goes through eight phases: new moon, waxing crescent, first quarter, full moon, waxing gibbous, third quarter, and declining crescent.

It takes the moon 29.5 days, or roughly one month, to go through all of these phases. This cycle of the moon changing phases is known as the lunar cycle.

Gibbous phases appear when more than half of the moon is illuminated, while crescent phases occur when just half is lighted.

Waxing is an increase in illumination, whereas waning is a reduction.

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The earth's atmosphere is transparent to most waves is visible part of the spectrum.

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Answer:

Explanation:

Around 500 volt energy

Answer:

When two objects collide the total momentum before the collision is equal to the total momentum after the collision (in the absence of external forces). This is the law of conservation of momentum. It is true for all collisions.

Explanation:

...

Answer:

When two objects collide the complete momentum before the collision is similar to the complete momentum afterwards the collision (in the absence of outside forces) . This is the law of conservation of momentum . it's accurate for all collisions .

When approaching the root of an equation, the Newton-Raphson method will quickly converge. this is a false.

" Root is a mathematical symbol that stands for the square root symbol or square root sign. In words, we call this symbol radical. The various types of symbols that are used to carry out arithmetic operations may have been covered in your math classes. In mathematics, the square root of any number is denoted by the root symbol.

As an illustration, 2 is used to symbolize the square root of 2. Similarly, for other natural numbers like 5, 6, 7, 8, 10, etc., we can write their corresponding square roots as 5, 6, 7, 8, and 10, respectively. The square root that is positive is always represented by this symbol.

Radicand: The number that appears beneath the root is referred to as the radicand, not the square root symbol.

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Position in equilibrium As the mass moves in the direction of x=+A, the greatest velocity occurs so at equilibrium position (x=0).

Q can be used to anticipate the direction of a reaction's equilibrium shift. In the event that K > Q, a reaction will proceed and transform reactants into products. If K Q, the reaction will go the other way and convert reactants into products. In the event where Q = K, the system

When all forces acting on a mechanical system are equal to zero, it is in equilibrium. Learn how to calculate the equilibrium position of such a mass oscillating on even a spring as well as the factors that influence it on this page.

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