The value of the speed of light c is defined to be 299,792,458 m/s. The frequency \nuν of a standard microwave is typically 2.45 GHz, though this may differ depending on the exact model.
Using the accepted value of cc and the frequency \nuν of a standard microwave:
What wavelength, \lambdaλ do you expect a microwave to produce?
What dd do you expect to measure?

Answer:

66.8

Explanation:

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Answer:

Explanation:

\((8.62 \times 10 - 2) - (1.94 \times 10 - 2)\)

Follow the PEDMAS order of Operation

\(8.62 \times 10 - 2 - 1.94 \times 10 + 2 \\ 86.2 - 2 - 19.4 + 2 \\ 86.2 - 2 - 17.4 \\ = 66.8\)

After 20 s, the motorcycle attains a speed of

\(\left(4\dfrac{\rm m}{\mathrm s^2}\right)(20\,\mathrm s)=80\dfrac{\rm m}{\rm s}\)

and it continues at this speed for the next 40 s. So at 45 s, its speed is 80 m/s.

The magnitude of the gravitational force between two people in the football game is calculated as 3.6 * 10⁻⁷ N.

Newton's law of gravitation states that force between two objects is directly proportional to product of the masses and inversely proportional to square of the distance between both of them.

As we know, F = G m₁ m₂/r²

G is gravitational constant = 6.67 * 10⁻¹¹ N.m²/kg,

Given, m₁= 90 kg, m₂ = 60 kg, distance, r = 1 m

So, F = 6.67 * 10⁻¹¹ N.m²/kg * 90 kg * 60 kg / 1²

Hence, F = 3.6 * 10⁻⁷ N

Thus the gravitational force between two people in the football game is 3.6 * 10⁻⁷ N.

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Explanation:

If the moon doubled in mass, that means that the Earth will not experience a total solar eclipse like today. Also, if it doubled in mass, tide waves would increase in size, as the moon would be bigger and would have a bigger gravitational pull. Also, gravity would be different on earth because the moon is bigger (gravity law by mass). Also, the sky would be ‘smaller’ than our actual sky

Answer:

If the moon's mass doubles, the Earth will not witness a total solar eclipse as today. Also, if its mass doubled, tide waves would double in size since the moon would be bigger and have a stronger gravitational attraction. Also, because the moon is larger, gravity on Earth would be different (gravity law by mass). Also, the sky would be "smaller" than it is now.

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Answer:

The maximum height is determined by the initial vertical velocity. Since steeper launch angles have a larger vertical velocity component, increasing the launch angle increases the maximum height.

Explanation:

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Answer:

m = 1,975 m / kg , b = 38.05 m

Explanation:

In this experiment, the elongation is plotted against the applied mass

getting a straight line

            y = m x + b

where b would be the initial length of spring let's calculate the slope for which we use two well separated points

           m = (56.3 -48.4) / (8 - 4)

           m = 1,975 m / kg

the equation remains

         y = 1,975 x + b

for x = 2 kg y = 42.0 m

we substitute in the equation

           42 = 1,975 2 + b

           b = 42 - 3.95

           b = 38.05 m

In 1820, Hans Christian Orsted discovered the relationship between electricity and magnetism, which is now known as electromagnetism.

Answer:

The 80 mph car

Because the formula says 1/2 mass but for the velocity it is squared

The gauge pressure at the bottom of the second cylinder is 0.10 atm.

The pressure of a system above the atmospheric pressure is known as gauge pressure, commonly referred to as overpressure. The pressure from the weight of the atmosphere is included in gauge pressure readings because gauge pressure is zero-referenced against ambient air (or atmospheric) pressure. This indicates that gauge pressure varies in response to both weather and height above sea level. Gauge pressure measurement is adequate for the majority of industrial applications because every operation in a refinery or manufacturing facility operates at the same air pressure. Absolute pressure is a measurement of pressure that is based on a reference pressure of zero or absolutely no pressure. The only place where this happens naturally is in a perfect vacuum, which can only be found in space.

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Answer:

Rock

Explanation:

Right on edg 2021 and 2020000000:P

Answer:

The answer is D. You're Welcome !

Answer:

8m/s

Explanation:

i think i had this question on a test i'm taking so i'm assuming i cannot say for sure if this is correct

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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Explanation:

average speed =(first velocity + second velocity)/2

=(10 +20)/2=15m/s

distance=average speed × time

= 15 × t ( but time not given)

Although a magnet can change the direction of travel of an electron beam, it cannot change its charge. The charge of an electron is a fundamental property and is not affected by magnetic fields.

A magnet is an object or material that produces a magnetic field, which can exert attractive or repulsive forces on other magnets or magnetic materials. It has a north pole and a south pole with opposite magnetic polarities. Magnets can be natural or artificial, and they are used in numerous applications like electric motors, generators, speakers, magnetic storage devices, and medical imaging machines. They play a crucial role in various industries and scientific fields where the manipulation of magnetic fields is necessary.

They are also commonly used in magnetic compasses for navigation and in various industrial and scientific applications where the manipulation of magnetic fields is required.

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Copernicus's model of the universe differs from Ptolemy's because Copernicus believed the Sun is at the center of the universe and majority of the bodies in the universe revolves around the Sun.

The universe is defined as the open place that contains the planets, stars, galaxies, and all other forms of matter and energy.

There are different models of the universe including which contains the Copernicus's model and Ptolemy's model.

The Copernicus's model of the universe differs from Ptolemy's because Copernicus believed the Sun is at the center of the universe and majority of the bodies in the universe revolves around the Sun.

While the Ptolemy's model of the universe differs from the Copernicus's model because Ptolemy believed that the Earth is at the center of the universe and everything in the universe revolves around the Earth.

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Answer:

No, he is not correct. Xenon is not very reactive since it is located in the group of noble gases. The noble gases are all chemically unreactive gases.Elements within different groups within the periodic table have different physical and chemical properties. Hope this answers the question.

Explanation:

Yes

Sample Response: Lorenzo is not correct. Nonmetals increase in reactivity from left to right because nonmetals on the right have more valence electrons. They need to gain fewer electrons to have a full outer shell. However, this trend only continues until group 17, because the noble gases already have a full outer shell. Therefore, their reactivity is the least of all the elements.

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protein channels play a critical role in the movement of solutes across cell membranes. Their specific composition and function allow for the selective movement of certain molecules or ions, which is necessary for proper cellular function.

1. Chart comparing the composition of the intracellular fluid and extracellular fluid Intracellular Fluid Extracellular Fluid Water Water Protein ions (K+, Mg2+, Na+, Ca2+, Cl-)Protein ions (K+, Mg2+, Na+, Ca2+, Cl-) Glucose Glucose Fatty acids Fatty acids Urea Urea Carbon dioxide Carbon dioxide Sodium, potassium, and chloride ionsSodium, potassium, and chloride ions

2. Importance of protein channels in the movement of solutesProtein channels are embedded in cell membranes, allowing for the movement of solutes across the membrane.

Protein channels are made up of proteins that are folded in a specific way, allowing them to act as tunnels that allow the movement of specific molecules or ions across the membrane.

The protein channels act as gatekeepers, ensuring that only certain molecules or ions can enter or exit the cell.There are different types of protein channels that perform different functions, such as allowing for the movement of water, ions, or larger molecules like glucose. These channels are critical to maintaining the proper balance of solutes inside and outside of cells, which is necessary for proper cellular function.

For example, the movement of sodium and potassium ions across the cell membrane is necessary for proper nerve function. If these ions are not able to move across the membrane due to a malfunctioning protein channel, it can lead to neurological disorders or diseases. Protein channels are also important in the movement of glucose, which is necessary for energy production in cells. Without proper glucose transport, cells cannot produce enough energy to carry out their functions.

In conclusion, protein channels play a critical role in the movement of solutes across cell membranes. Their specific composition and function allow for the selective movement of certain molecules or ions, which is necessary for proper cellular function.

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Answer:

Speed = 68.75m/s

Explanation:

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the equation;

\(Speed = \frac{distance}{time}\)

\(S = \frac{d}{t}\)

Given the following data;

Distance = 550m

Time = 8secs

Substituting into the above equation;

\(S = \frac{550}{8}\)

Speed, S = 68.75m/s

Using this data the quantity which is trying to find is average speed.Thus, option C is correct.

Average speed is defined as the total distance traveled in total time taken it means that we can calculate the average speed obtained by an object.

Mathematically,

Average Speed = Total distance travelled/Total time taken

It's S.I unit is meter/second

Average speed is a scaler quantity it means that it has only magnitude not direction. MKS is refers to meter, kilogram, seconds. It forms the base of international systems of units though SI has since been redefined by different fundamental constants.

Therefore, Using this data the quantity which is trying to find is average speed.Thus, option C is correct.

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The resultant reaction P (Newton) acting on the body is determined as 14.7 N.

Limiting equilibrium means that an object is just on the threshold of motion. In other words, a slight application of force will result in the motion of the body.

The resultant reaction P (Newton) acting on the body is calculated by applying Newton's second law of motion as follows;

∑F = ma

where;

F - Ff = ma

where;

If the body is in equilibrium, the acceleration of the body is zero.

F - Ff = m(0)

F - Ff = 0

F = Ff

F = Ff = 14.7 N

Thus, the resultant reaction acting on the body is a function of the applied force and the direction of the force as shown in the above calculation.

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The induced voltage in the second case will be higher but the change in flux will be same in comparison to the first case.

In the experiment of measuring the change of flux and the induced voltage,

In the first case the magnet is dropped from a height 3cm of the coil and in the second case the the magnet is raised so that it drops 20cm before entering the coil.

When compare to the first case the second case will have a higher value of induced voltage but the change in flux will be same.

The induced voltage in a coil is given by,

E = dM/dt

dM is change in magnetic flux,

t is time,

As we can see that the time is inversely proportional to the induced emf and in the second case the magnet is drop from a height which allows it to go with the higher velocity in a less time that is why the induced EMF is more in magnitude but because the magnet is same in both the cases the change in flux is constant.

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Since energy can be measured as work, we can write energy = force x distance. Thus SI derived unit of energy has the units of newtons x meter or kg m2/s2.

Explanation:

In case the resistors are in series

R =R1 + R2

R = 40 ohm + 40 ohm

R = 80 ohm

In case the resistors are in parallel

R = 1/R1 + 1/R2

R = 1/40 + 1/40

R = 2/40 ohm

R = 1/20 ohm or R = 0.05 ohm

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Answer:

dtwtwerEtbWt

Explanation:

bwtrbtWbTW4TBW4tbW4T4t

Answer:

Atoms makes different things because of the difference in the number of protons and neutrons.

Explanation:

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Answer:

The Ability to do work

Explanation:

energy is needed to do work because without energy no work can be done due to the fact that there is no energy

Emission nebulae produce emission spectra. These spectra are characterized by bright, colorful lines that correspond to the specific wavelengths of light that the content loaded in the nebula is emitting.

This is in contrast to absorption spectra, which are produced when light from a source passes through a cooler, less dense gas or material, and certain wavelengths are absorbed, resulting in dark lines. Emission spectra are the patterns of light emitted by atoms or molecules when they are excited or heated. When energy is added to an atom or molecule, such as by heating it or by exposing it to an electrical discharge, its electrons become excited and move to higher energy levels. As these electrons fall back down to lower energy levels, they release energy in the form of light. Each element or molecule has a unique set of energy levels and corresponding wavelengths of light that it can emit. Therefore, the emission spectrum of a substance is like a fingerprint that can be used to identify it. Emission spectra are important in many fields, including astronomy, chemistry, and physics. In astronomy, scientists use the emission spectra of stars to determine their composition and temperature. In chemistry, emission spectra are used to identify unknown substances and to study the behavior of molecules. In physics, emission spectra provide insights into the quantum mechanics of atoms and molecules.

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Emission nebulae are vast regions of ionized gas that emit light in a variety of colors.

These nebulae are formed due to the intense radiation emitted by nearby stars, which ionizes the gas in the nebula and causes it to emit light.

The light emitted by emission nebulae produces a distinct type of spectrum known as an emission spectrum.

An emission spectrum is produced when an object emits light at specific wavelengths or frequencies. In the case of emission nebulae, the ionized gas in the nebula emits light at specific wavelengths, depending on the elements present in the gas.

Each element emits light at a unique set of wavelengths, which produces a unique emission spectrum.

The emission spectrum of an emission nebula is characterized by bright lines at specific wavelengths.

These lines are called emission lines and are produced when electrons in the ionized gas transition from a higher energy level to a lower energy level, emitting light at a specific wavelength.

In summary, emission nebulae produce an emission spectrum characterized by bright emission lines at specific wavelengths. This spectrum provides valuable information about the composition and physical properties of the ionized gas in the nebula.

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the equation using V_rock = 3.10 / 4600 (since density = mass / volume), we get:Tension = 30.38 N

How to solve the question?

To solve this problem, we can use Archimedes' principle, which states that the buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. In this case, the buoyant force acting on the rock is equal to the weight of the water displaced by the part of the rock submerged in water.

First, we need to find the volume of the rock. We know that half of the rock's volume is under water, so the volume of the rock is:

V_rock = (2 * V_underwater) = (2 * (0.5 * V_rock)) = V_rock

where V_underwater is the volume of the rock submerged in water.

Rearranging the equation, we can find the volume of the rock:

V_rock = V_underwater / 0.5

Next, we can find the weight of the water displaced by the rock, which is equal to the buoyant force acting on the rock:

F_buoyant = weight of water displaced = density of water * volume of water displaced * gravity

where density of water = 1000 kg/m³, volume of water displaced = 0.5 * V_rock, and gravity = 9.8 m/s²

Substituting the values, we get:

F_buoyant = 1000 * (0.5 * V_rock) * 9.8

Now, we can find the weight of the rock:

weight of rock = mass of rock * gravity

where mass of rock = 3.10 kg and gravity = 9.8 m/s².

Substituting the values, we get:

weight of rock = 3.10 * 9.8

Finally, the tension in the string is equal to the weight of the rock minus the buoyant force acting on the rock:

Tension = weight of rock - F_buoyant

Substituting the values, we get:

Tension = (3.10 * 9.8) - (1000 * (0.5 * V_rock) * 9.8)

Simplifying the equation using V_rock = 3.10 / 4600 (since density = mass / volume), we get:

Tension = 30.38 N

Therefore, the tension in the string is 30.38 N.

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