Six friends are at a pizzeria. They want to order enough pizza so that each person can eat at least 2/5 . ​ start fraction, 2, divided by, 5, end fraction of a pizza. What is the minimum number of pizzas they should order?

Answer:

Force, [tex]F=9.21\times 10^{-24}\ N[/tex]

Explanation:

Charge on proton is [tex]+1.6\times 10^{-19}\ C[/tex].

The electrical force between charges is given by the product of charges and divided by square of distance between them. So, electric force is :

[tex]F=\dfrac{kq^2}{r^2}\\\\F=\dfrac{9\times 10^9\times (1.6\times 10^{-19})^2}{(0.00500 )^2}\\\\F=9.21\times 10^{-24}\ N[/tex]

So, force between protons is [tex]9.21\times 10^{-24}\ N[/tex].

Mechanical Energy = PE + KE

PE: mgh = 200 x 9.8 x 18 = 35280

PE: 35280 Joules

KE: 1/2mv^2 = 1/2 x 200 x 16^2 = 25600

KE: 25600 Joules

ME: 35280 + 25600

ME: 60,880J

Answer:

ΔV = 150 V

Explanation:

Answer:

If Thomson's atomic theory was accurate, the positively charged particles would have gone through the foil. The balanced positive charges and negative charges within the atom would have made the atom neutral, and the positive charges would not have been concentrated enough to cause deflection.

Explanation:

Answer:

THEY ARE CORRECT ^^^

Explanation:

Answer:

one person exerts more force than the other so that the forces are unbalanced.

Explanation:

Answer:

C.one person exerts more force than the other so that the forces are unbalanced

Explanation:

just took the test

Answer:

same as the potential energy possessed at top

= 0.5×9.8×8

= 39.2 joules

Answer: The answer is 40 J.

Explanation: I did it just now.

Answer:

Using formula: P = I^2 x R, we have:

P = 1.5^2 x 1.26 = 2.835 W

Hope this helps!

:)

Answer:

2.835 Watts

Explanation:

P = I²R

P = 1.5² × 1.26

P = 2.835 Watts

The average speed is 1.54 miles per hour.

As we know that,

              Average speed [tex]=\frac{Distance}{time}[/tex]

Given that Timmy and Sarah travel 5 miles in  three hours and 15 minutes.

Time [tex]=3+\frac{15}{60} =\frac{13}{4}hours[/tex]

    Average speed [tex]=5\div \frac{13}{4} =5*\frac{4}{13}=1.54 miles/hour[/tex]

Thus, The average speed is 1.54 miles per hour.

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Answer:Mercury, Venus, Earth and Mars.

Explanation: The surfaces of asteroids and the rocky, ice covered moons of the outer gas planets are cratered as well.

Answer:

Speed of wave 54 ms⁻¹.

Explanation:

Given data:

Frequency of wave = 60 Hz

Wavelength of wave = 0.90 m

Speed = ?

Solution:

Formula

speed = wavelength × frequency

Now we will put the values in formula.

v = f × λ

Hz =  s⁻¹

v = 60 s⁻¹ × 0.90 m

v = 54 m s⁻¹

A wave with a frequency of 60 Hz and a wavelength of 0.90 m through rubber travels at a speed of 54 m/s.

The speed of a wave can be calculated by the formula: Speed = Frequency * Wavelength. Given that the frequency is 60.0 Hz and the wavelength is 0.90 m, we can substitute these values into the formula. Therefore, the speed of the wave is 60.0 Hz * 0.90 m = 54 m/s. This means that a wave with a frequency of 60 Hz and a wavelength of 0.90 m travels through rubber at a speed of 54 m/s.

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Answer:

D

Explanation:

Answer:

These fields have electric and magnetic energy, therefore the light wave carries energy.

it does not transport matter

Explanation:

Light is an electromagnetic wave formed by the oscillation of electric and magnetic fields.

These fields have electric and magnetic energy, therefore the light wave carries energy.

But the wave does not need matter for its movement, which is why it transports matter. If we use the criterion of special relativity the mass of a light wave that travels at speed must be zero, so with this criterion it does not transport matter either

Final answer:

A light wave reflected from the Moon to Earth carries energy in the form of light and momentum, but it does not carry matter.

Explanation:

When a light wave strikes the moon and is reflected towards Earth, it carries energy but not matter. Light interacts with matter by reflecting, transmitting, or being absorbed, which may convert it into other forms of energy like heat. However, light itself is a form of energy and does not carry matter. The moon reflects sunlight, which then travels to Earth, illuminating the moon phases we observe.

Since light carries momentum as well, the energy transfer occurs when light impacts matter, but the absence of mass means no matter is carried with the light waves as they travel from the Moon to Earth.

Answer:

Reflection of Light. When light waves are incident on a smooth, flat surface, they reflect away from the surface at the same angle as they arrive. ... Regardless of whether light is acting as particles or waves, however, the result of reflection is the same.

Answer:

Electric power

Explanation:

Electric power is the rate at which electrical energy is converted to or from another form of energy, such as heat or light. The ratio of power to current is called the voltage.

Hope this helps!!!!!!!!!!!!!!

Forever friend and helper,

Cammie:)

Electric power is the rate at which electrical energy is converted into other forms of energy.

Electrical energy is the energy derived from electric potential energy or kinetic energy of the charged particles.

Specific examples of electrical energy include:

Electric power is the rate at which work is done or energy is transformed into an electrical circuit. Electric power is measured in watts.

[tex]P = VI[/tex]

Where,

[tex]P[/tex] is the power

[tex]V[/tex] is the potential difference in the circuit.

[tex]I[/tex] is the electric current.

It can also be expressed as

[tex]P = I^{2}R[/tex]

Electric power is the scalar quantity.

Thus, it can be concluded that the rate at which electrical energy is converted into other forms of energy is called electric power.

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Answer:

red light > electron > proton > baseball > person > car

Explanation:

To calculate the wavelength associated to each object, you use the Broglie's relation:

[tex]\lambda=\frac{h}{mv}\\\\[/tex]

h: Planck,s constant = 6.62*10^-34 Js

m: mass

v: velocity

For each object you use an average values of its mass.

person:

mass = 80kg

[tex]\lambda=\frac{6.62*10^{-34}Js}{(80kg)(4.5m/s)}=1.83*10^{-36}m[/tex]

electron:

mass = 9.1*10^{-31}kg

[tex]\lambda=\frac{6.62*10^{-34}Js}{(9.1*10^{-31}kg)(0.01c)}\\\\\lambda=\frac{6.62*10^{-34}Js}{(9.1*10^{-31}kg)(0.01(3*10^{8}m/s))}\\\\\lambda=2.42*10^{-10}m[/tex]

red light:

In this case you use the following formula:

[tex]\lambda=\frac{c}{f}=\frac{3*10^8m/s}{4.3*10^{14}Hz}=6.97*10^{-7}m\approx700nm[/tex]

proton:

mass = 1.67*10^{-27}kg

[tex]\lambda=\frac{6.62*10^{-34}Js}{(1.67*10^{-27}kg)(0.01(3*10^8m/s))}\\\\\lambda=1.32*10^{-13}m[/tex]

car:

mass = 1500kg

[tex]\lambda=\frac{6.62*10^{-34}Js}{(1500kg)(27m/s)}=1.63*10^{-38}m[/tex]

baseball:

mass = 0.145kg

[tex]\lambda=\frac{6.62*10^{-34}Js}{(0.145kg)(41m/s)}\\\\\lambda=1.11*10^{-34}m[/tex]

hence, by comparing the wavelengths of the objects you have:

red light > electron > proton > baseball > person > car

speed =frequency ×wavelength

1200×1.2=1440m/s

s=2d/t

1440=2d/5

2d=7200

d=3600m

The distance of the ocean at this location should be considered as the 3600 m.

Since we know that

speed =frequency ×wavelength

So,

1200×1.2=1440m/s

Also we can say that

s=2d/t

So,

1440=2d/5

2d=7200

d=3600m

hence, The distance of the ocean at this location should be considered as the 3600 m.

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Spectrographs help astronomers classify stars by providing a 'fingerprint' of the star. This fingerprint allows astronomers to determine the composition, temperature and other factors of a star.

Spectrographs are critical tools in astronomy because they allow astronomers to analyze and classify stars based on their spectra. When light from a star passes through a spectrograph, it is split into its component colors, creating a spectrum. This spectrum is like a fingerprint for the star because each element leaves a specific pattern of spectral lines in the star's light. In other words, by identifying these lines, astronomers can determine the composition of stars.

In addition to determining a star's composition, the spectrum can also give hints about a star's temperature, velocity relative to Earth, and even information about its size. So, while a spectrograph does not directly measure the size or brightness of stars, the data it provides enables astronomers to infer this information.

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The correct answer is option D. They analyze the composition of stars.

Answer:

C my brodaz

Explanation:

Answer:

"Right Hand

Right Hand Rule: Magnetic fields exert forces on moving charges. This force is one of the most basic known. The direction of the magnetic force on a moving charge is perpendicular to the plane formed by v and B and follows right hand rule–1 (RHR-1) "

Explanation:

Answer:

The direction of the magnetic force acting on a moving electric charge in a magnetic field is perpendicular to the direction of motion. A magnetic force is exerted on an electric charge moving through a uniform magnetic field. An electric charge moving parallel to a magnetic field experiences a magnetic force.

Explanation:

Answer:

There are 5 significant figures.

Explanation:

You must start conting your sig figs until you continue to hit zeros at the end. Those zeroes at the end are disregarded. So 0.0609 is where you get your sig figs from.

Answer:

A.

collect samples.

Explanation:

The main goal of science is to gain knowledge about the natural world, but this goal is nearly impossible to achieve without technology.

Technologies are products or processes that are created to solve a problem and/or take care of a human need. Technology is often used in science to collect samples, make measurements, collect and store data, analyze data through computations and graphing, and access remote locations, such as outer space.

PLEASE DON'T HESITATE TO GIVE BRAINLIEST AND/OR A THANKS!

Answer: Option A

Explanation:

It is correct

Answer:

soil and sand

Explanation:

hope it's helpful

Answer:

The flow of fluid molecules in fluid mechanics is synonymous to the flow of electrons in electricity.

Explanation:

The flow of fluid molecules in fluid mechanics is synonymous to the flow of electrons in electricity. Water, when it is falling by the force of gravity, can be used to turn turbines and generators that produce electricity.

A turbine converts the kinetic energy of falling water into mechanical energy. Then a generator converts the mechanical energy from the turbine into electrical energy. Hydroelectric power plants are the most efficient means of producing electric energy.

Discussing gravity and fluid flows is beneficial when learning about electricity due to the analogies between these phenomena, which aid in understanding the behavior of electric charges and circuits. These comparisons help visualize electrical concepts and deepen comprehension of various electrical phenomena and technologies.

Discussing gravity and fluid flows when learning about electricity is crucial due to the similarities in the concepts governing all these phenomena. For instance, electricity is often taught through the analogy of water flow in pipes, where electric current, voltage, and resistance are likened to the flow rate, pressure difference, and pipe size in fluid dynamics. This analogy helps students visualize and understand how electric charges behave in circuits, just as water flows through a system under the influence of gravity. Moreover, the concept of gravitational potential energy in physics is analogous to electric potential energy in electromagnetism, where masses and charges experience forces due to their respective fields. Understanding these analogies deeply enriches the comprehension of electrical phenomena and leads to insights into the behavior of electricity in various mediums, such as solids, liquids, and gases.

Examples such as lightning, the formation of bluish crust on car battery terminals, and the need for electrolytes in sports drinks can be understood better by studying the flow of charged particles. These particles, like fluid in the presence of a gravitational field, respond to electric fields by moving from areas of high potential to low potential, analogous to water flowing downward due to gravity. This comparison between electric and gravitational fields lays a solid foundation for exploring more complex electrical behaviors and technologies.

Answer:

1. Potential energy is converted into kinetic energy since they are in motion.

2. As they slope down, work is done against the dissipative forces e.g; Air resistance, viscosity ( friction ). Hence energy is lost.

3. Different weights and heights at which they started sloping.

[tex]potential \: energy = mgh[/tex]

where mg is the weight.

h is the height moved

therefore, weight and height determines the potential energy.

When skiers descend, their potential energy converts to kinetic energy, which powers their movement. Energy is lost through friction and air resistance, reducing their overall energy. Different skiers can have different potential energy due to their varying mass.

1. As the skiers move down the mountain, their potential energy, which is energy stored due to their elevated position, is converted into kinetic energy. This is the energy of motion that allows them to accelerate and move downhill.

2. In theory, potential energy would convert perfectly to kinetic energy. However, in reality, some energy is lost due to friction between the skis and the snow and through air resistance. These forces cause the skiers to lose speed over time, which means they will not be able to reach their original height when performing tricks.

3. Even though all skiers launch from the same location, their potential energy could vary due to differences in mass. According to the formula for potential energy which is PE = mgh (mass x gravity x height), a skier with a larger mass would have more potential energy than a skier with smaller mass, assuming they are at the same height.

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Answer:

Because it turn to the next side or i should say in the back.

Explanation:

Answer:

C

Explanation:

So,the right answer is of option C.

look at the attached picture

Hope it will be helpful to you

Answer:

Boiling point

Explanation:

A liquid turns into a vapor at a certain temperature, known as the boiling point.

The boiling point is the temperature at which a liquid transforms into a gas. It is a fundamental concept in chemistry and is typically related to phase transitions and thermodynamics. In Dalton's experiment, the boiling point of the liquid under study was observed to be 135°C.

The boiling point is the temperature at which a liquid transforms into a gas or vapor. In Dalton's investigation, the boiling point of the liquid he was studying was 135°C. This concept applies when substances are undergoing a phase transition from liquid to gas, which is a core principle of chemistry. During this process, the average kinetic energy of the molecules of the liquid increases, and more molecules have sufficient energy to escape from the liquid into the gas phase.

The observation of a substance changing states due to an increase in temperature, as Dalton has done in his experiment, is crucial to understanding the nature and properties of the substance. The transition of a substance from a liquid to a gas is also an important concept in thermodynamics, with applications in areas such as cooking and the semiconductor industry.

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Answer:

(i)The current flow in black wire = 9.67 A (ii) The current low in the red wire is 9.68 A (iii) The current flow in neutral wire is  15.36 A (iv) when 240 volt were disconnected current  in black wire is 7.68 A (v) when 240 volt were disconnected current in red wire is 7.68 A (vi) 15.36 A (vii) 6.34 (viii) 9.68 A (ix) 12.02 A

Explanation:

Solution

The current drawn by one amp is

I =P/V

I =200/120

I= 1.67 A

(i) The current flow in the black wire  is

IBK = 4 * 1.67 A + 1A + 2A

IBK = 9.67 A

(ii) Current flow in the red wire is

IRD = 3 * 1.67 A + 1.67 A + 1A + 2A

= 8.68A + 1 A = 9.68 A

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