A car travels one third of a path with speed of 50 ms and two third of path with 20ms , its average speed will be.
a. 45ms
b. 30ms
c. 25ms
20ms

In order to cause electrons to be ejected from the surface of this metal you should use light of a shorter wavelength.

The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material. Electrons emitted in this manner are called photoelectrons. The phenomenon is studied in condensed matter physics, and solid state and quantum chemistry to draw inferences about the properties of atoms, molecules and solids. The effect has found use in electronic devices specialized for light detection and precisely timed electron emission.

This process is also often referred to as photoemission. In terms of their behaviour and their properties, photoelectrons are no different from other electrons. The prefix, photo-, simply tells us that the electrons have been ejected from a metal surface by incident light.

The photons of a light beam have a characteristic energy, called photon energy, which is proportional to the frequency of the light. In the photoemission process, when an electron within some material absorbs the energy of a photon and acquires more energy than its binding energy, it is likely to be ejected. If the photon energy is too low, the electron is unable to escape the material. Since an increase in the intensity of low-frequency light will only increase the number of low-energy photons, this change in intensity will not create any single photon with enough energy to dislodge an electron. Moreover, the energy of the emitted electrons will not depend on the intensity of the incoming light of a given frequency, but only on the energy of the individual photons.

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The rms voltage output of the generator is 1.94 × 10⁻ ⁵ V.

RMS is an acronym for root mean squared. An RMS value is more than just the "amount of AC power that causes the same heating impact as an analogous DC power" or something along those lines.

No. of loop = 795

Diameter of the coil = 10.5 cm

Radius of the coil = 5.25 cm

Magnetic Field, B = 0.45 T

Time, t = 70.0 rev/s

              [tex]V_{rms} =\frac{NwAB}{\sqrt{2} }[/tex]

Where,

              N = No. of loop

              A = Area of the coil

              B = Magnetic Field

              [tex]V_{rms}[/tex] = Voltage rms

Area of the coil = πr²

                        = 86.57 cm²

w = 2π/t

   =( 2 × 3.141)/70.0

   = 0.089

[tex]V_{rms} =\frac{795*0.089*86.57* 0.45}{\sqrt{2} }\\\\V_{rms} =\frac{2756.36}{\sqrt{2} }\\\\\\V_{rms} =\frac{2756.36}{1.414 }\\\\V_{rms} = 1.94 * 10^-^5 V[/tex]

Therefore, the rms voltage output of the generator is 1.94 × 10⁻ ⁵ V.

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The feather fell at the same rate as the hammer.

The Moon's surface gravity is about 1/6th as powerful or about 1.6 meters per second per second. The Moon's surface gravity is weaker because it is far less massive than Earth. A body's surface gravity is proportional to its mass, but inversely proportional to the square of its radius.

Gravity accelerates both objects at the same rate, but if no other force than gravitational force act on the object , and as we know that air resistance affect the rate of fall but at moon their is no air  resistance. Hence their is no other force acting on the feather and hammer than the gravitation force of moon .

Because the Apollo crew were essentially in a vacuum, there was no air resistance,  the feather fell at the same rate as the hammer. This is exactly what Galileo had concluded hundreds of years before: all objects released together fall at the same rate regardless of mass.

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Answer:

so the answer is 45

Explanation:

you 15x3=45

5x3=15

this is a  another way to do it add 15+15+15=45

15+15=30

then you add 15

then you get 45

From sea level to the top of the atmosphere, a column of air with a 1-m2 cross section weighs 101,000 N.

To find the answer we have to know about the pressure.

                    [tex]Pressure, P=\frac{Thrust}{Area}=\frac{F}{A}[/tex]

                   [tex]P=P_a=1.013*10^5 pascal[/tex]

Pa is the atmospheric pressure at the sea level.

                                       [tex]\frac{F}{A}=P_a[/tex]

              [tex]F=W=P_a*A=1.013*10^5*1=101300N[/tex]

Thus, we can conclude that, the weight of air in a column 1-m2 in cross section that extends from sea level to the top of the atmosphere is 101300N.

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Due to its motion in the magnetic field of the bar magnet, the charge will experience a force perpendicular to both the velocity of the charge and the magnetic field

Magnetic Field is the region around a magnetic material or a moving electric charge within which the force of magnetism acts. A pictorial representation of the magnetic field which describes how a magnetic force is distributed within and around a magnetic material.

If you point your pointer finger in the direction the positive charge is moving, and then your middle finger in the direction of the magnetic field, your thumb points in the direction of the magnetic force pushing on the moving charge is called right hand rule .

The magnitude of the force is proportional to q, v, B, and the sine of the angle between v and B.

Hence , the magnetic force on a free moving charge is perpendicular to both the velocity of the charge and the magnetic field with direction given by the right hand rule.

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Energy is transferred.

Every time labour is performed, energy is transmitted, as shown by the definition of work in physics. Work is the result of the displacement's magnitude and the component of force acting in that direction.

What are 3 types of work done?

Work is the result of force and distance, or the force exerted over a specific distance. In other words, Work = Force x Distance.

Joules are used to measure work.

1. Positive Work: Positive work is when a force moves an object in that direction. The motion of a ball descending toward the earth while it is displaced in the direction of the force of gravity is an illustration of this type of labour.

2. Negative Work: The work is said to be negative if the force and the displacement are in the opposing directions. For instance, if a ball is thrown high, its displacement will also be upwards, while the force from the earth's gravity will be downward.

3. Zero Work: When the force and displacement directions are parallel to one another, there is no work done on the item by the force.

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Answer:Energy is transferred.

Explanation: Took the test and Passed

Answer:

[tex]1275 kg*m/s[/tex]

Explanation:

We'll use the momentum equation:

[tex]p=mv[/tex]

where:

p = momentum

m = mass

v = velocity

Since we're doing the magnitude of momentum of the system, we'll add the mass of the cyclist and the mountain bike together:

[tex]70.0 kg + 15.0kg=85.0 kg[/tex]

Given that, we can now substitute our given values into the momentum equation:

[tex]p=mv\\p=85.0kg*15.0m/s[/tex]

Our final answer is:

[tex]p= 1275 kg*m/s[/tex]

Learning Through Observation

Albert Bandura believed that associations and direct reinforcements simply could not account for all learning. "Learning would be exceedingly laborious, not to mention hazardous if people had to rely solely on the effects of their own actions to inform them what to do," he famously wrote in his 1977 book Social Learning Theory.

Instead, he proposed that much of learning takes place through observation. Children observe the actions of those around them, particularly caregivers and siblings, and then imitate these behaviors. In his well-known Bobo doll experiment, Bandura revealed just how easily children could be led to imitate even negative actions. Children who watched a video of an adult beating up a large inflatable doll were then much more likely to copy those same actions when given a chance.

Perhaps most importantly, Bandura noted that learning something does not necessarily result in a change in behavior. Children frequently learning new things through observation, but might not engage in such behaviors themselves until there is actually a need or motivation to utilize the information.

hope it helps you

Compared with the coma, or the visible fuzzy ball, of a comet 10^6 km in diameter, the diameter of the nucleus of the comet is very small about 10km.

A comet's coma is the nebulous envelope that surrounds its core and is created when the comet approaches the Sun on its extremely elliptical orbit; when the comet warms, some of its material sublimates. A comet's nucleus is the region in its centre.

The coma, a diffuse, brilliant zone that may have a million kilometres in diameter, surrounds the nucleus, which has a diameter of only a few kilometres. Typically, the diameter of this ice and dust cloud is less than 10 miles (16 kilometres), or roughly the size of a small town.

Therefore, Compared with the coma, or the visible fuzzy ball, of a comet 10^6 km in diameter, the diameter of the nucleus of the comet is very small about 10km.

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The central pitch around which a scale and its associated harmonies is built is called Tonic.

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The self-inductance of a coil will change by 8 times its original value by increasing its radius value by 2 and increasing the length of the coil by 2.

Self-Inductance: -

The definition of self-inductance is the induction of a voltage in a wire that carries current when the current in the wire is changing. In the instance of self-inductance, the circuit itself induces a voltage through the magnetic field produced by a changing current.

We know that the self-inductance of the coil is denoted by: -

L= µ *π*(r)^2*(N)^2*l

Where

L= Self-Inductance of the coil

µ= Magnetic Permeability Constant

r= Radius of the coil

l= Length of the coil

N= Number of turns of the coil

Here Self-inductance of the coil is directly proportional to the length of the coil and the square of the radius of the coil.

So,

On increasing the radius of the coil by a factor of 2 and the length of the coil by 2 the self-inductance of the coil increases by 8 times its original value.

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Copernicus rediscovered aristarchus’s model of a heliocentric solar system.

Aristarchus asserted that one may determine the distances between the Sun and Moon by measuring the angle between them when the Moon is half-illuminated (admittedly, the illumination itself suggested the angle). Aristarchus recognised that the Moon does not emit light of its own, but rather shines as a result of the Sun's light.

It's because Polish-born astronomer Copernicus was responsible. He initially introduced the heliocentric hypothesis in his book De revolutionibus orbium coelestium, "On the Revolutions of Celestial Bodies," which was released in.

Therefore, Copernicus rediscovered aristarchus’s model of a heliocentric solar system.

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Answer:

Copernicus

Explanation:

The symbols that completes the given nuclear equation are written as follows:

An alpha decay can be defined as a type of radioactive decay in which the atomic nucleus of a radioactive element emits an alpha particle, thereby, producing chemical elements with a different atomic nucleus.

During an alpha decay, the radioactive element has a mass number that is decreased by four (4) and an atomic number that is decreased by two (2), which is typically an atom of Helium (⁴He₂).

A beta particle can be defined as an isotope which typically undergoes radioactive decay through the emission of a radiation with a -1 charge. This ultimately implies that, an atom of neutron becomes a proton and an electron (₀e⁻¹) and an atom of proton also becomes a neutron and a positron (⁰⁻e₁⁺) during beta decay.

In conclusion, the symbols that completes the given nuclear equation are written as follows:

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Answer:B

0.02166 ohms

Explanation:

Answer:

Explanation:

Formula

Voltage (volts) = current (amps) * resistance (0hms). The terms in brackets are the units.

Givens

V = 13 volts

I = 600 amps

R =  ? ohms

Solution

V = I * R

13 = 600 * R                  Divide both sides by 600

13/600 = 600R/600     Do the division

0.0216 ohms = R           This is almost a dead short.

Answer

R = 0.0216

Answer:

In today's world pollution is very high so alternative energy such as solar energy help us to make pollution free world. So it is necessary to use alternative energy.

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[tex] \blue{ \star}[/tex]Magnetic Energy :

[tex] \blue{ \star}[/tex]Gravitational Energy :

[tex] \blue{ \star}[/tex]Nuclear Energy :

[tex] \blue{ \star}[/tex]Thermal energy :

Gravity has an effect on the ease of landing on moons and planets. And on leaving! Actually Earth is about as heavy a planet as one could want. It takes a lot of fuel to leave Earth and a huge amount of energy to ship anything from Earth. Hence the attraction of using the moon or Mars as a base for exploration. But if you have to ship everything to the moon and then transship to other destinations it’s a losing proposition. The only thing that would make it work would be the ability to find lots of water and oxygen on the moon.

The first moment of the total cross-sectional area taken about the neutral axis must be zero.

A member that resists bending has a neutral axis in its cross-section along which there are no longitudinal stresses or strains. The neutral axis lies at the geometric centroid if the section is symmetric, isotropic, and does not curve before a bend. The neutral axis is not under any strain. Therefore, the neutral axis has no bending moment. Because the neutral axis is not affected by the applied stresses, there is no bending stress. At the neutral axis, no stress is created. The line in the cross-section of a beam where there is neither longitudinal compression nor tensile stress is known as the neutral axis for that beam. The neutral axis is typically regarded in the study of wood beams to be at the centroid of the beam.

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The first moment of the total cross sectional area taken about the neutral axis must be zero.

As with non-composite beams, the neutral axis (NA) is the location where the bending stress is zero. The location of the NA depends on the relative stiffness and size of each of the material sections.

Generally, the NA location is determined relative to the bottom surface of the beam. However, this is not mandatory, and the location can be relative to any location. If the bottom is used, then the NA axis is a distance "h"

The distance h can be determined by recalling that the stresses through the cross section must be in equilibrium.

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The bin will not move because the frictional force is greater than the net force acting on the bin.

The net force acting on the bin is obtained by subtracting the force acting on the Easterly direction from that acting in the Westerly direction.

Net force = 110 N - 52 N

Net force = 58 N

The frictional force acting on the bin is determined as well using the given formula:

Frictional force = coefficient of static friction * normal reaction

Norma reaction = 26 * 9.81

Normal reaction = 255.06 N

coefficient of static friction = 0.25

Frictional force = 0.25 * 255.06

Frictional force = 63.8 N

Since the frictional force is greater than the net force acting on the bin, the bin will not move.

In conclusion, the frictional force is the force that opposes relative between two objects at their surface of contact.

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Liquid and gas  forms of water will be present in a 1. 0 l flask at 303 k containing a visible amount of liquid water(the vapour pressure of water at 303 k is 31. 8 mmHg).

Because the problem mentions that there is liquid water visible in the flask, liquid must be one of the correct options. Additionally, liquid water has a vapour pressure of 31.8 mmHg at the given temperature, meaning there will 31.8 mmHg of gaseous water present as well, so the correct answer is liquid and gas.

Vapour pressure or equilibrium vapour pressure is defined as the pressure exerted by a vapour in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapour pressure is an indication of a liquid's evaporation rate.

It relates to the tendency of particles to escape from the liquid (or a solid). A substance with a high vapour pressure at normal temperatures is often referred to as volatile. The pressure exhibited by vapour present above a liquid surface is known as vapour pressure.

As the temperature of a liquid increases, the kinetic energy of its molecules also increases. As the kinetic energy of the molecules increases, the number of molecules transitioning into a vapour also increases, thereby increasing the vapour pressure.

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Your hand feels colder when it transitions from warm to "colder" (room temperature) water.

Your hand feels colder when you move it from the warm water to the "colder" (room temperature) water. Skin surface temperature will decrease in a constant ambient environment as a result of sympathetic nerve activity increasing and blood flow decreasing as a result of cutaneous receptors triggered by ice-water immersion of one hand in the palm skin of the non-immersed opposite hand.

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The distance between adjacent compressions or rarefactions is called the wavelength of the longitudinal waves.

To find the answer, we have to know more about the Longitudinal waves.

Thus, we can conclude that, the distance between adjacent compressions or rarefactions is called the wavelength of the longitudinal waves.

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The average emf induced is "ωBA volts".if we know the value of ω, B & A we can easily calculate the value. Faraday's law of induction determines the typical emf produced by spinning a coil's turn in the earth's magnetic field.

Discussion:

According to this equation, the magnetic flux through a closed loop changes at a time rate equal to the negative of the induced emf in the loop.

Calculation:

This flux value is constant and no electromagnetic field (EMF) is produced when the loop is positioned in the earth's magnetic field without moving. When the magnetic field starts rotating, the area and magnetic field strength stay constant, but the angle between the plane of the area's normal and the field lines continues to alter or fluctuate. Due to the magnetic flux's relationship to angle and the time dt at which an average emf is produced in the coil, this results in a change in the net magnetic field across the loop.

The flux φ = BAcosθ

E = - dφ/dt = - d(BAcosθ)/dt

As "B" & "A", both are constant

so, E= - BAd(cosθ)/dt

where, θ = the function of time

θ = ωt

where, ω = angular frequency (rad/sec)

E = -BAd(Cosωt)/dt

E = - (-ω)BA Sinωt = ωBA Sinωt

E = ωBASinωt

E = -d(BACosθ)/dt

The plane is now parallel to the field, and the normal is now perpendicular to the field.

θ=90°

Therefore, E= ωBASin90° = ωBA(1) = ωBA

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Answer:

The car applies a force in the opposite direction it is moving to. That is; from east to west.

Explanation:

This obeys Newtons third law of motion.

critical angle = [tex]i_{cr}[/tex] = 73.7°

total internal reflection = [tex]\alpha[/tex]cr = 54.58°

Given:

refractive index of core, [tex]n_{core}[/tex] = 1.46

refractive index of clad, [tex]n_{clad}[/tex] = 1.4

The incidence angle that causes the refraction angle to be equal to that at that angle of incidence is known as the critical angle.

The incidence angle needs to be greater than the critical angle for Total Internal Reflection to happen.

Now, we know that the critical angle = θcr is given by:

sinθcr = [tex]\frac{n_{clad} }{n_{core} }[/tex]

θcr = [tex]sin^{-1}[/tex] ([tex]\frac{n_{clad} }{n_{core} }[/tex])

θcr = [tex]sin^{-1}[/tex] ([tex]\frac{1.4}{1.46}[/tex])

= [tex]sin^{-1}[/tex](0.96)

=73.7° = [tex]i_{cr}[/tex]

Now for [tex]\alpha[/tex]cr:

[tex]sini_{cr}[/tex]/[tex]sin\alpha _{cr}[/tex] = 1/[tex]n_{core}[/tex]

[tex]sin\alpha _{cr}[/tex] = sin(90° - 73.7°) × 1.46

[tex]sin\alpha _{cr}[/tex] = sin(16.3°) × 1.46

          =-0.558 × 1.46

          =-0.815

[tex]\alpha _{cr}[/tex] = [tex]sin^{-1}[/tex](0.815)

      = 54.58°

Total internal reflection means that none of the light that might conceivably travel away from this surface is refracted and that all of it is reflected.

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With angular momentum quantum number l = 2. in units of ħ, the value of l will be 2.4494 h.

The total angular momentum quantum number in quantum mechanics parametrizes the total angular momentum of a particular particle by combining its orbital angular momentum and intrinsic angular momentum.

Given the angular momentum quantum number l = 2. in units of ħ. Therefore, the value of L can be written as,

L = √[l (l + 1)]

L = √[2 (2 + 1)]

L = √[2 (3)]

L = √6

L = 2.4494 h

Hence, With angular momentum quantum number l = 2. in units of ħ, the value of l will be 2.4494 h.

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The Bronsted-Lowry model focuses on the transfer of H⁺ in an acid-base reaction.

According to the Bronsted-Lowry theory, often known as the proton theory of acids and bases, any substance that can transfer a proton to another substance is an acid, and the substance that accepts the proton is a base. Because it makes up the nucleus of a hydrogen atom, a proton is a nuclear particle with a unit positive electrical charge; it is denoted by the symbol H⁺.

The Bronsted-Lowry scheme states that an object can only act as an acid in the presence of a base and that an object can only act as a base in the presence of an acid. In addition, when a basic substance obtains a proton, it generates an acid known as the conjugate acid of a base, and when an acidic substance loses a proton, it forms a base known as the conjugate base of an acid.

I understand the question you are looking for is this:

The Bronsted-Lowry model focuses on the transfer of _______ in an acid-base reaction.

a. neutrons

b. OH-

c. H+

d. orbitals

e. electrons

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The correct answer is option (C) the temperature of the shirt will increase because all wavelengths of light are absorbed by the shirt.

The relationship of heat and light

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Answer:

the value of the boltzman constant 8.61 73303 into 10 ratio by - 5 EV upon knev