Calculate the energy of a photon with a wavelength of 410nm.
a) 4.85 x 10-19 j
b) 4.85 x 10-20 j
c) 4.85 x 10-18 j
d) 2.06 x 1019 j
e) 2.06 x 1020 j

Answer:

Explanation:

Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force

Answer:The first law of motion states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

The distance actually fallen in t seconds is defined by d = Vot + 16t^2 or 16t^2 with an initial velocity of Vo = 0.

And the object will fall at 160ft/sec speed.

When gravity first exerts force on an object, its initial velocity defines how quickly the object moves. The final velocity, on the other hand, is a vector quantity that measures the

The position of an object dropped from a height of 1000 ft. is given by s = 1000 – Vot – 16[tex]t^{2}[/tex], or 1000 – 16[tex]t^{2}[/tex] for Vo = 0, s being the distance from the ground.

The equation s(t) = Vot – 16[tex]t^{2}[/tex] is the height reached when propelled upward at a velocity of Vo.

An object dropped from a height if 1000 ft. will have a velocity of

Vf = Vo + gt = Vo + 32t = 0 + 32(5) = 160 ft/sec.

The distance fallen in this 5 second is s = Vot + [tex]\frac{gt^2}{2}[/tex] = Vot + 16[tex]t^{2}[/tex] = 0 + 16([tex]5^{2}[/tex]) = 400 feet, making the position, or distance, from the ground 600 feet.

The formula d = Vot + 16[tex]t^{2}[/tex] or 16 [tex]t^{2}[/tex]with an initial velocity of Vo = 0 determines the distance that actually fell in t seconds.

The position of an object dropped from a height of 1000 feet can be calculated using the formula s = 1000 – Vot – 16t2, or 1000 – 16t2 for Vo = 0.

The height attained when moving upward at a velocity of Vo can be calculated using the equation s(t) = Vot – 16t2.

The velocity of an item falling from a height of 1000 feet is Vf = Vo + gt = Vo + 32t = 0 + 32(5) = 160 ft/sec.

The location, or distance, from the ground is 600 feet due to the distance that was lost in these five seconds: s = Vot + gt2/2 = Vot + 16t2 = 0 + 16(52) = 400 feet.

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Yes, a friction force to the right acts on the furniture.

The force preventing solid surfaces, fluid layers, and material components from sliding past one another are known as friction. When surfaces in contact move past one another, the friction between the two surfaces transforms kinetic energy into thermal energy (that is, it converts work to heat). As demonstrated by the utilization of friction produced by rubbing pieces of wood together to start a fire, this feature can have dramatic effects. Every time there is motion with friction, such as when a viscous fluid is agitated, kinetic energy is transformed into thermal energy. Wear is a significant side effect of several types of friction that can result in deteriorated performance or component damage. The discipline of tribology includes friction.

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The possible values of its xx component are 13, 9.

A part is a practically free piece of any framework. It carries out some role and may require some information or produce some result. A part in programming is frequently addressed by classes. Each piece of a two-layered vector is known as a part. The parts of a vector portray the impact of that vector in a provided guidance. The consolidated impact of the two parts is comparable to the impact of the single two-layered vector. The part strategy is a method for adding various vectors to each other in physical science. It empowers the option of right-calculated vector parts to find a resultant vector having an extent and heading that relies upon the singular parts added.

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The kinetic energy of the helium nucleus will be 4.98 x 10⁻¹³ J

Kinetic energy can be define as , that it is a form of energy that an object or a particle is cause of its motion. Its unit is joule  i.e. j & it is given as,

K.E. = 1/2 mv²

where , m is mass of the particle and v is the velocity of the particle .

Energy can be expressed as, the ability to perform work. Energy can neither be created nor destroyed, but it can only be transformed from one form to another. The unit of energy is  joule .

Mass of helium nucleus = m = 6.64 x 10⁻²⁷ kg

Speed of light = c = 3 x 10⁸ m/s

Speed of light at 5.00% = c = 5.00/100x 3 x 10⁸ m/s = 1.5 x 10⁷ m/s

The kinetic energy of the helium nucleus can be given as ,

K.E = ¹/₂mc²

K.E = ¹/₂ x (6.64 x 10⁻²⁷) x (1. 5 x 10⁷)²

K.E =  4.98 x 10⁻¹³ J

Therefore, the kinetic energy of the helium nucleus is 4.98  x 10⁻¹³ J

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1.549×10-19lJ is the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =7 to =1.

The equation E= hcE =hc, where h is Planck's constant and c is the speed of light, describes the inverse relationship between a photon's energy (E) and the wavelength of light ().

The Rydberg formula is used to determine the energy change.

Rydberg's original formula used wavelengths, but we may rewrite it using units of energy instead. The result is the following.

aaΔE=R(1n2f−1n2i) aa

were

2.17810-18lJ is the Rydberg constant.

The initial and ultimate energy levels are ni and nf.

As a change of pace from

n=5 to n=3 gives us

ΔE

=2.178×10-18lJ (132−152)

=2.178×10-18lJ (19−125)

=2.178×10-18lJ×25 - 9/25×9

=2.178×10-18lJ×16/225

=1.549×10-19lJ

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The radius is equal to the Earth’s radius. You can find this information online by computing the Earth’s surface area while assuming that it is a perfect sphere, then multiplying the result by the percentage of the planet that is covered in water.

Actually, you can demonstrate this without knowing the radius.

P/A = e•s•T4

Water has an emissivity, e, of roughly 0.96. And 5.67108 W/m2 K4 is the Stefan-Boltzmann constant.

The power radiated from a black body is described by the Stefan-Boltzmann law in terms of its temperature. The Stefan-Boltzmann constant, often known as the proportionality constant, is derived from several well-known physical constants.

Where k is the Boltzmann constant, h is the Planck’s constant, and c is the speed of light in a vacuum, the constant has the value since 2019

When compared to a black body, a body that does not completely absorb incident radiation (sometimes referred to as a grey body) emits less total energy.

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The term “electric field” refers to the physical field that surrounds electrically charged particles and acts to either attract or repel all other charged particles in the field (also known as an E-field).

It can also refer to the physical field surrounding a system of charged particles. Electric fields are composed of electric charges and time-varying electric currents.

Both electric and magnetic fields are manifestations of the electromagnetic field, one of the four fundamental interactions (sometimes known as forces) of nature.

Electrical technology makes use of electric fields, which are significant in many branches of physics.

For instance, in atomic physics and chemistry, the electric field acts as an attractive force to hold atoms’ atomic nuclei and electrons together. It is also the force that causes atoms to chemically link together to form molecules.

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The resistance will also be doubled when the device is made of same material and when heated to the same amount.

Resistance is defined as the opposition in the flow of current in an electrical circuit. It is measured in ohm. The electrical resistance of a conductor of unit cross-sectional area and unit length is known as Resistivity. It is represented by ρ.

The relation between resistance and resistivity is, ρ = RA/l . Here, R is Resistance , A is Area of wire and l is length of wire. Resistivity is directly proportional to the resistance. The resistivity of a material is doubled when heated a certain amount. So, for a same material heated to same extend the resistance will also be doubled.

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(a) The magnitude of →B is 2.43 km,

(b) The angle relative to due south is 56.7o in anti-clockwise direction.

© The magnitude of the →A−→B displacement is |→A−→B|=4.45 km

(d) The angle relative to due south is 326.7o in counterclockwise direction

326.7o

If there is a given vector →A then its opposite vector will be −→A

If the vector →A makes an angle θ above the positive x axis then the vector −→A will make the same angle below the negative x axis.

Given that:  

The first displacement vector is →A=−2.95 ^j km

The second displacement vector is →B=B^i

The magnitude of the resultant displacement is |→A+→B|=4.45 km

Let this resultant makes an angle θ above the positive x axis.

The resultant of the given vectors is,

→A+→B=−2.95 ^j km + B ^i (4.45 cos θ ^i+4.45 sin θ ^j) km

=−2.95 ^j km + B ^i

By comparing both sides, we get

(4.45 sin θ ^j) km

=−2.95 ^j km

⟹θ=−56.7∘

or 90∘−56.7∘= 33.3∘ with south.

and (4.45 cosθ ^i) km

=B ^i(4.45 cos (−33.3∘) ^i) km

=B ^i

B=2.43 km

The magnitude of →B

is 2.43 km

b.) The angle relative to due south is 56.7o in anti-clockwise direction.

The magnitude of the →A−→B

displacement is |→A−→B|=4.45 km

Let this resultant makes an angle αabove the positive x axis.

c.) The difference of the given vectors is,

→A−→B=−2.95 ^j km−B ^i(4.45 cosα ^i+4.45 sinα ^j) km

=−2.95 ^j km−B ^i

By comparing both sides, we get

(1.77 sinα ^j) km

=−1.32 ^j km

α=−56.7o

or 270∘+56.7∘=326.7o

with south.

and (4.45 cosα ^i) km

=−B ^i(4.45 cos(−56.7∘) ^i) km

=−B ^i

B=−2.43 km

The magnitude of →B

Is 2.43km

(d) Hence, the angle relative to due south is 326.7o in counterclockwise direction

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The vibrational frequency of a bond is measured in this spectroscopic method

To investigate the molecule level interaction, spectroscopic methods are used. In this regard, nuclear magnetic resonance is one method (NMR). NMR is utilised to analyse the interaction between mucus and polymers, and carbon and/or proton NMR can also elaborate this interaction.

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Experimental drinking frequently occurs as a result of taste aversion and social pressure.

Peer pressure is the influence or pressure that comes from one's peers. Peers are frequently referred to be members of the same social or age group. Peers often surround themselves with dimwitted or poor self-esteem individuals to do their bidding because they feel the need to be in charge.

Peer pressure has several root reasons, including the need to fit in, low self-esteem, fear of being rejected, and, most often, the desire to feel safe and secure among peers. Peer pressure has the worst results and might have severe impacts. Ages 12 to 19 are when peer pressure is most prevalent. Teenagers sometimes succumb to peer pressure and do things they wouldn't otherwise do.

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The most adaptable type of turbo machinery available today is the gas turbine. It can be employed in a variety of ways in crucial sectors like aviation, oil and gas, process facilities, power generation, and smaller allied industries.

Typically, outages last about 1-2 hours. Recall that all outage start times are approximations. They are intended to be suggestions rather than set schedules. You may aid in averting outages. The three most frequent causes are overload, human mistake, and natural causes. A halt or failure in the flow of power, particularly electricity. A two-hour blackout on the East Coast during which power is lost. A halt in a machine or mechanism's operation brought on by a problem with the electrical or power source.

Basically, any disruption between the production of electricity and its delivery to houses might result in a power outage. It can be caused by bad weather, human error, defective equipment, and even animal involvement.

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Valid line of code for displaying the twenty-eighth element of some array is System.out.println(somearray[27]).

Arrays are among the most well-known and essential data structures, and they are utilized by practically all programs. A wide variety of additional data structures, including lists and strings, are likewise implemented using them. They successfully take advantage of computers' addressing systems. The memory is a one-dimensional array of words whose indices are their addresses in the majority of contemporary computers and many external storage devices. Array operations are frequently optimized for by processors, especially vector processors.

The main reason why arrays are helpful is that the element indices may be calculated in real time. This feature, among other things, enables a single iterative statement to process an array's items in any number.

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The work needed to slide the crate at a distance of 22 m is

[tex]$W=4.38 \times 10^3 J$[/tex]

The work done by a constant force on an object as the object moves along a displacement vector [tex]$\vec{d}$[/tex] is given by the formula involving the dot product of the two vectors:

[tex]$W=\vec{F} \cdot \vec{d}=F d \cos (\theta)$$[/tex]

Where [tex]$\vec{F}[/tex], F is the force vector and its magnitude respectively, [tex]$\vec{d}[/tex], d is the displacement vector and its magnitude respectively and [tex]$\theta$[/tex] is the angle between the displacement vector and the force vector.

Given:

Force acting on the crate, F = 230 N

Distance traveled by the crate,

[tex]$d=22 \mathrm{~m}$$[/tex]

The angle between the force and the displacement,

[tex]$$\theta=30^{\circ}$$[/tex]

Then the work done by the force on the crate as it travels 22 m under the action of the force is

[tex]$W &=F d \cos \theta \\[/tex]

[tex]$&=230 \times 22 \cos 30^{\circ} \\[/tex]

simplifying the above equation, we get

[tex]$&=230 \times 22 \times \frac{\sqrt{3}}{2} \\[/tex]

[tex]$&=4382.089 \mathrm{~J} \\[/tex]

[tex]$&=4.38 \times 10^3 \mathrm{~J}[/tex]

Therefore the work needed to slide the crate at a distance of 22 m is

[tex]$W=4.38 \times 10^3 J$[/tex]

The complete question is:

How much work does it take to slide a crate 22m along a loading dock by pulling on it with a [tex]$230-\mathrm{N}$[/tex] force at an angle of [tex]$30^{\circ}$[/tex] from the horizontal?

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It is assumed that every adult has a home phone number is the potential source of bias

Systematic variations in how individuals are dropped from the study and how the results are adjusted for them (e.g., incomplete follow-up, differential attrition). bias brought on by an inadequate evaluation of the results. During the course of the study, selection bias can arise from missing data bias.

It is not possible to totally avoid confounding effects. Therefore, every scientist should be aware of all potential causes of bias and take all reasonable steps to minimize and lessen the departure from the truth. Authors should acknowledge any remaining variation in their writing by outlining any recognized constraints on their effort.

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The complete question is: An opinion poll calls 2000 randomly chosen residential telephone numbers then asked to speak with an adult member of the household the interviewer asks box office revenues are at an all-time high how many movies have you watched any theater in the past 12 months and all 1131 people responded the researchers use the responses to estimate the main number of movies adults have watched any movie theater in the past 12 months. What is the potential source of bias in this question

a) mass of object with acceleration 32.5 ft/sec2 is 116 kg

b) mass of object with acceleration 7.86 m/sec2 is 146 kg

Given:

Force = 1.15 x 10^3 N

Acceleration = a) 32.5 ft/sec2 b) 7.86 m/sec2

Solution: The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

Force = mass x acceleration

mass(a) = Force/Acceleration

= 1.15 x 10^3 N/32.5 ft/sec2 x 3.2808 ft/m = 116 kg

mass(b) = 1.15 x 10^3 N/7.86 m/sec2 = 146 kg

Hence, mass of object with acceleration 32.5 ft/sec2 is 116 kg

Hence, mass of object with acceleration 7.86 m/sec2 is 146 kg

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If the number of protons of a carbon atom is changed from 6 to 7, such an atom will no longer be a carbon atom.

The number of protons in an atom determines the atomic number of the atom. The atomic number of an atom determines the kind of atom.

For example, lithium has 3 protons and thus, an atomic number of 3. Carbon has the atomic number of 6 because it has 6 protons.

No atom of the same element can have a different number of protons. However, other atomic such as the number of electrons and neutrons components can vary.

Atoms of the same element with a different number of neutrons are called isotopes. Ions of the same atom will have a variable number of electrons.

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Answer:

See below

Explanation:

Each parallel row = 50 v   so there is 25 cells in each  (2 v each)

  200 cells / 25 cells / row = 8 rows  of 25 cells each

    the equivalent resistance is

          each row has resistance = 25 ohms

               equivalent resistance =

                            1 / ( 8 * 1/25) = 3.125 ohms

The second option is the correct answer to the question. The complete question is attached

In the beginning, the cart started from rest and moved to the right. The movement represents positive acceleration

In the middle, there is no change in velocity hence no acceleration. This means that the value of acceleration is zero

A the end, the cart had a negative acceleration which brings the cart to rest.

Acceleration refers to the change in velocity with time. Usually when there is no change in velocity acceleration is zero. The value can also be positive or negative depending on the velocity.

When there is an increase in velocity, the result is positive acceleration but in a situation when there is a decrease in velocity the result is negative acceleration. At the peak pf negative acceleration the result is to put the object accelerating to a stop.

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If the ore is tossed overboard, then the water level in the lock will remain the same.

In the above situation, Archimedes’ Principle is used.

It was given by a Greek Scientist, Archimedes in 246 CE.

According to this principle, the upward buoyant force on a body that is exerted on a body immersed in a liquid is equal to the weight of the liquid displaced by the body.

The formula for Buoyant force is given by the following formula

Force = ρ x g x v

Here  ρ = density of the fluid

g = acceleration due to gravity

v = Volume of the fluid

Thus, When the ore is tossed overboard, then it displaces water equal to its weight, so the water level remains the same.

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The mass of nitrogen is calculated as 1.092 grams

According to Dalton's Law of partial pressure:

Pn2 = Ptotal Xn2

Were,

Pn2is the partial pressure of nitrogen

Ptotal is the Total pressure

Xn2is the mole fraction of nitrogen

Given:

Total pressure = 1.0 atm

Mole fraction of nitrogen = 0.78

Partial pressure of nitrogen:

Pn2= 1.0 x 0.78 atm

According to Henry's law:

Solubility = Henry's constant (k)×Partial pressure

k = 6.26×10⁻⁴ mol/L-atm

Thus,

Solubility of nitrogen = 6.26×10⁻⁴ mol/L-atm×0.78 atm = 4.8828×10⁻⁴ mol/L

Given: Volume = 80.0 L

So, Moles of nitrogen gas dissolved:

Moles = Solubility (Concentration dissolved) ×Volume

Moles = 4.8828×10⁻⁴ mol/L×80.0 L = 0.0390 moles

Also,

moles = mass (m) / molar mass (M)

mass of nitrogen = moles x molar mass

Molar mass of nitrogen gas = 28 g/mol

So,

Mass of nitrogen gas dissolved = 0.0390 moles×28 g/mol = 1.092 grams

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Answer:

Forces have magnitude and direction.

Explanation:

Force is a vector quantity.

Answer: Concentration of H+ =10^-7; log of 10^-7=7 so pH=7

Explanation:

Answer:

23.63985719

Explanation:

pls dont ask it was painfull

Force required to move a block is 1.615 N

Given:

mass of block = m = 150 pounds = 68 kg

distance = d = 5 ft = 1.52 metres

time = t = 8 sec

To Find:

force required to move the block

Solution: Force is defined as product of mass and acceleration and it's unit is N or Newton.

Velocity = displacement/ time = 1.52 / 8 = 0.19 m/s

Acceleration = velocity/time = 0.19/8 =

0.023 m/s^2

Force = mass x acceleration = 68x0.023 = 1.615 N

Hence, force required to move the block is 1.615 N

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The power consumed by the razor is 100W.

According to Ohm's law,

Therefore Resistance R = [tex]V^{2}[/tex] / P

Given,

Power in North America P[tex]^{NA}[/tex] = 25 w

Voltage in North America V[tex]^{NA}[/tex] = 120 V

Voltage in Europe V[tex]^{EU}[/tex] = 240 V

Resistance in North America R[tex]^{NA}[/tex] = [tex]120^{2}[/tex] / 25 = 576 Ω

Resistance in Europe R[tex]^{EU}[/tex] = 576 Ω ( Assumed constant )

Power in Europe P[tex]^{EU}[/tex] = [tex]240^{2}[/tex] / 576 = 100 w

Ohm's law describes that the Current across a conductor is directly proportional to the Voltage across those two points.

Therefore power consumed by the razor is 100W.

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The correct answer is an important measure for controlling bias.

An effective way to prevent under-coverage in a memory experiment would be to randomly assign students to two separate groups.

The scientific method that must be repeatable and the data must be empirical for science to be trusted.

When scientists publish their work, they include enough information so that other scientists can repeat the experiment and obtain the same outcomes.

Additionally, in contrast to theories that are not supported by facts, the scientific method is founded on empirical evidence, which is derived from personal observations of the outside world.

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