About 0.001 seconds after the Big Bang, an important event that occurred was the rapid expansion of space-time during a brief period of inflation.
This inflationary period is believed to have occurred in the first trillionth of a second after the Big Bang and is responsible for the universe's current large-scale structure. During this time, the universe expanded exponentially, increasing its size by a factor of at least 10^26.
This expansion allowed for the even distribution of matter and energy throughout the universe, which we observe today in the cosmic microwave background radiation.
The inflationary period also created tiny fluctuations in density that served as the seeds for the formation of galaxies and galaxy clusters. The exact mechanism behind this inflationary period is still not fully understood, and it remains an active area of research in cosmology.
To know more about "Rapid expansion" refer here:
https://brainly.com/question/24102834#
#SPJ11
A beaker whose mass is 140g when filled with water and without water its mass is 80g find the volume of water
The volume of water in the beaker is 60 cm³.
To find the volume of water in the beaker, we need to use the principle of displacement. When an object is submerged in a liquid, it displaces an amount of liquid equal to its own volume. We can use this principle to find the volume of water in the beaker.
First, we need to find the mass of the water in the beaker. We can do this by finding the difference between the mass of the beaker when it is empty and when it is filled with water.
Mass of water = Mass of beaker + water - Mass of empty beaker
Mass of water = 140g - 80g
Mass of water = 60g
Next, we need to use the density of water to convert the mass of water into its volume. The density of water at room temperature is approximately 1 gram per cubic centimeter (1 g/cm³).
Density = Mass/Volume
Rearranging the formula, we get:
Volume = Mass/Density
Substituting the values, we get:
Volume of water = 60g / 1g/cm³
Volume of water = 60 cm³
To learn more about volume
https://brainly.com/question/28058531
#SPJ4
help.. Given
,
,
, and
. Determine the magnitude of
.
Given:
[tex]||\vec u||=8, \ \theta_{\vec {u}}=55 \textdegree[/tex]
[tex]||\vec v||=6, \ \theta_{\vec {v}}=40 \textdegree[/tex]
Find:
[tex]||\vec u + \vec v || = \ ??[/tex]
In order to complete this problem we first have split each vector given in magnitude-angle form into its components.
[tex]\vec u = < \vec u_x, \vec u_y > = < ||\vec u||cos \theta_{\vec {u}},||\vec u||sin \theta_{\vec {u}} >[/tex]
[tex]\vec v = < \vec v_x, \vec v_y > = < ||\vec v||cos \theta_{\vec {v}},||\vec v||sin \theta_{\vec {v}} >[/tex]
For vector u:
[tex]\vec u = < (8)cos(55\textdegree),(8)sin (55\textdegree) > \Longrightarrow \boxed{\vec u = < 4.589,6.553 > }[/tex]
For vector v:
[tex]\vec v = < (6)cos(40\textdegree),(6)sin (40\textdegree) > \Longrightarrow \boxed{\vec v = < 4.596,3.857 > }[/tex]
Now we have vectors u and v split into their x and y components. We can now add these vectors.
[tex]\vec u + \vec v = < \vec{u_x}+\vec{v_x},\vec{u_y}+\vec{v_y} >[/tex]
[tex]\Longrightarrow \vec u + \vec v = < 4.589+4.596,6.553+3.857 > \Longrightarrow \boxed{\vec u + \vec v = < 9.185,10.41 > }[/tex]
The question asks for the magnitude of vectors u plus v. So,
[tex]||\vec u + \vec v|| = \sqrt{((\vec u + \vec v)_x)^2+((\vec u + \vec v)_y)^2}[/tex] and the angle, [tex]\theta=tan^{-1}(\frac{(\vec u + \vec v)_y}{(\vec u + \vec v)_x} )[/tex]
[tex]\Longrightarrow ||\vec u + \vec v|| = \sqrt{(9.185)^2+(10.41)^2} \Longrightarrow \boxed{ ||\vec u + \vec v||=13.883}[/tex]
[tex]\Longrightarrow\theta=tan^{-1}(\frac{10.41}{9.185} ) \Longrightarrow\boxed{\theta=48.577 \textdegree}[/tex]
Thus, [tex]\boxed{ ||\vec u + \vec v||=13.883 \ at \ {\theta=48.577 \textdegree}} \therefore Sol.[/tex]
An object is completely submerged in a liquid. Which quantity depends on the depth of the object in the liquid?
A) The pressure on the object.
B) The buoyant force on the object.
C) Both of them.
D) Neither of them.
A) The pressure on the object.
This is because the pressure exerted by a liquid on an object increases with depth due to the weight of the liquid above it. The buoyant force on the object, on the other hand, depends on the density of the liquid and the volume of the object, but not on the depth of the object in the liquid.
It is important to note that both the pressure and the buoyant force play important roles in determining the behavior of submerged objects, but only the pressure is directly affected by the depth of the object in the liquid.
This is a detailed answer to your question. When an object is submerged in a liquid, the pressure it experiences depends on the depth below the surface of the liquid. The pressure increases with depth due to the weight of the liquid above the object. The formula for calculating pressure at a given depth is:
Pressure = Density × Gravity × Depth
To know more about Pressure visit:
https://brainly.com/question/12971272
#SPJ11
The acronym radar is formed from the word "radio" with what other two words (plus "and")?
The acronym RADAR stands for "Radio Detection and Ranging." It is formed from the words "radio," "detection," and "ranging" with the inclusion of the word "and."
The term "radio" refers to the use of radio waves in the system, "detection" refers to the process of detecting the reflected signal, and "ranging" refers to the use of the time delay between transmission and reception to determine the distance to the reflecting object. Together, these three components make up the basic functionality of radar systems.
It takes for the radio waves to travel from the radar system to the object and back. Overall, radar is a versatile technology that is used in a variety of applications, including air traffic control, weather forecasting, military operations, and more.
Learn more about radar at: https://brainly.com/question/1073374
#SPJ11
Suppose a 9 v battery is connected across a light bulb. in what form is the electrical energy supplied by the battery dissipated by the light bulb?
When a 9-volt battery is connected across a light bulb, the electrical energy supplied by the battery is dissipated by the light bulb in the form of light and heat.
As the battery provides a potential difference across the circuit, the electric current flows through the filament of the light bulb. The filament is usually made of tungsten and it has high resistance, which causes it to heat up rapidly. The high temperature of the filament causes it to emit light, which is the main purpose of the light bulb.
However, some of the electrical energy is also converted into heat energy due to the resistance of the filament. This heat energy is radiated from the filament and also heats up the surrounding air. Therefore, the electrical energy supplied by the battery is dissipated by the light bulb in the form of light and heat energy.
To learn more about electrical energy click here
brainly.com/question/18739636
#SPJ11
temperature also decreases with altitude. how does that relate to the change in air density?
As altitude increases, the temperature decreases due to the decrease in air pressure. This decrease in temperature causes the air molecules to move slower and become more compact, which in turn decreases the air density.
Therefore, the decrease in temperature at higher altitudes directly relates to the decrease in air density.
As temperature decreases with altitude, it affects air density. When the temperature drops, the air molecules move slower and become more compact, leading to an increase in density.
However, since air pressure also decreases with altitude, this counteracts the increased density due to temperature drop. Overall, air density decreases as altitude increases because the decrease in air pressure has a more significant impact.
To know more about Temperature click here .
brainly.com/question/7510619
#SPJ11
Does a snake give off CO2? Yes or no? (Explain why.)
Explanation:
yes because snake is a living thing and snake breathes oxygen.
If the wavelength of a set of waves is 20 feet long, how deep is the wave base?
If the wavelength of the waves is 20 feet long, the depth of the wave base would be approximately 10 feet deep.
In shallow water, the depth of the wave base is affected by the shape and slope of the seafloor.
If the seafloor is gradually sloping, the wave base will be deeper than if the seafloor is steeply sloping.
Additionally, as waves approach the shore, the decrease in water depth causes the wave speed to decrease and the wavelength to shorten, which in turn affects the depth of the wave base.
In such cases, the depth of the wave base can be calculated using mathematical formulas that take into account the depth of the water and the properties of the waves.
Read more about wavelength
https://brainly.com/question/13533093
#SPJ11
pleaseee help me
Now suppose that Boy A experts of 3000 newtons on the box to the right and Boy B exerts a force of 5000 newtons in the opposite direction. What is the combined force (net force) on the box?
If Boy A exerts a force of 3000 newtons on the box to the right and Boy B exerts a force of 5000 newtons in the opposite direction. then combined force (net force) on the box is 2000 N to the left.
Force is responsible for the motion of an object. it produces acceleration in the body. According to newton's second law force is mass times acceleration i.e. F =ma. Its SI unit is N which is equivalent to kg.m/s². There are two types of forces, balanced force and unbalanced force. When Net force is zero which is called as balanced force.
Given,
F₁ = 3000 N
F₂ = -5000 N
Net Force = F₁ + F₂
Net Force = 3000 N - 5000 N = -2000N negative sign is for left.
To know more about Force :
brainly.com/question/13191643
#SPJ1.
Newton's laws state that all objects exert gravitational force and that objects with more mass exert more force. which system of objects has the greatest effect on the orbit of Halley's comet?
A. Earth, the Sun, and the Moon
B. the Sun, Jupiter, and Saturn
C. asteroids, meteoroids, and dwarf planets
D. Earth, the Sun, and Saturn
The Sun, Jupiter, and Saturn have the greatest effect on the orbit of Halley's comet. Option B is correct.
According to Newton's law of gravitation, the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Therefore, the gravitational force between the Sun and Halley's comet is the most significant factor determining the comet's orbit.
However, other massive bodies in the solar system can also affect the comet's orbit through their gravitational influence. The combined gravitational pull of Jupiter and Saturn is particularly strong due to their large masses, and they have been known to affect the orbits of many comets, including Halley's comet.
In contrast, the Moon's mass is relatively small compared to that of the Sun and the planets, so its gravitational effect on Halley's comet is negligible. Similarly, asteroids, meteoroids, and dwarf planets have much smaller masses than the Sun and the giant planets, so their effect on the comet's orbit is also minimal. Option B is correct.
To know more about the Gravitational, here
https://brainly.com/question/31598271
#SPJ4
Why does knowing the velocity of a cloud in the disk of the milky way help astronomers figure out how far away it is?
Knowing the velocity of a cloud in the disk of the Milky Way helps astronomers figure out how far away it is because of a principle called the Doppler effect.
The Doppler effect is the change in the frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. When an object, such as a cloud of gas, is moving away from an observer, the wavelength of light it emits appears longer, or red-shifted. Conversely, when an object is moving towards an observer, the wavelength of light it emits appears shorter, or blue-shifted.
By measuring the Doppler shift of the light emitted by a cloud in the disk of the Milky Way, astronomers can determine whether it is moving towards or away from us. If they know the cloud's velocity and can measure the Doppler shift, they can calculate how far away the cloud is using the Doppler equation. This allows astronomers to map out the structure of the Milky Way and better understand the movements of objects within it.
In conclusion, knowing the velocity of a cloud in the disk of the Milky Way helps astronomers figure out how far away it is through the use of the Doppler effect, which allows them to measure the shift in light wavelength and calculate distance.
Learn more about light here:
https://brainly.com/question/16713206
#SPJ11
are the hypotheses correct in the lab: thermal energy transfer?
The hypothesis for the experiment of thermal energy transfer is that:
Variables Different masses will change the temperature at different rates when exposed to the same amount of thermal energy due to the reason that the amount of mass affects an object’s ability to absorb thermal energy.
What is thermal energy?
Thermal energy is described as to the energy contained within a system that is responsible for its temperature.
thermal energy transfer are said to happen in three different ways and they include:
radiation.conduction.convection.Learn more about Thermal energy at: https://brainly.com/question/934320
#SPJ1
Heating the metal Imagine that, in lab, you record the mass of a piece of metal, mmetal, as mstal 45.00 g 3어 metal 5. In the next step of the lab (as shown in the animation to the left) you heat up the piece of metal. Play the animation, and record the metal's highest temperature, Tmetal Number metal Hot Plate Reset Begin
Heating up a piece of metal involves adding thermal energy to the metal, which causes its temperature to rise. The metal's highest temperature, Tmetal, is dependent on various factors such as the amount of thermal energy added, the specific heat capacity of the metal, and its mass.
When a metal is heated, the kinetic energy of its particles increases, causing the particles to vibrate and move more quickly. This increase in energy causes the metal to expand slightly, which can be observed as a change in its dimensions. The amount of expansion that occurs is dependent on the coefficient of thermal expansion of the metal.
In addition to expansion, heating a metal can also cause it to change its physical properties. For example, some metals become more malleable when heated, which means they can be easily shaped or molded. On the other hand, some metals become brittle and may crack or break when exposed to high temperatures.
To determine the metal's highest temperature, it is important to use a reliable temperature measuring device such as a thermometer or a thermocouple. Once the metal reaches its highest temperature, it may be cooled down using various methods such as air cooling or water cooling.
Overall, heating up a piece of metal involves adding thermal energy to the metal, which causes its temperature to rise. The metal's highest temperature, Tmetal, is dependent on various factors such as the amount of thermal energy added, the specific heat capacity of the metal, and its mass.
For more such questions on Thermal energy.
https://brainly.com/question/30859008#
#SPJ11
Large ships passing each other in the Panama Canal at risk colliding into one another due to the mutual pull of gravity between them. Explain. (hint - think about the friction water has on the ship)
The mutual pull of gravity between two large ships passing each other in the Panama Canal is not strong enough to cause a collision.
What is Collision?The interaction of two or more objects that results in an abrupt change in their velocity or state is called a collision.
What is Friction?A force called friction opposes the motion of objects in touch with one another. It develops due to the contact between the surfaces of two things.
Compared to other forces acting on them, such as the force of water friction, the gravitational force between two huge ships is relatively minimal.
The movement of two ships as they pass one another in a canal is usually done leisurely, with the canal operators closely monitoring the campaign to prevent accidents. Powerful engines and rudders on the ships also enable them to maneuver and change course as necessary.
However, the ships' engines must overcome a sizable force that the friction between the Ships and the water produces. The water is disturbed when the ships pass one another, leading to turbulence and increased friction between the boat and the water.
The ships' engines may need to work harder to compensate for the increased friction, making maintaining their direction and speed harder. This increased friction could result in a collision if the boats are not carefully guided and their rates are not correctly managed.
Because of this, even though the gravitational attraction between two huge ships passing one another in the Panama Canal is not significant enough to result in a collision, the friction between the Ships and the water is a considerable component that must be carefully regulated to prevent collisions.
Learn more about Friction :
brainly.com/question/24386803
#SPJ1
an open vertical tube has water in it. a tuning fork vibrates over its mouth. as the water level is lowered in the tube, a resonance is heard when the water level is 30 cm below the top of the tube, and again after the water level is 50 cm below the top of the tube a resonance is heard. what is the frequency of the tuning fork? the speed of sound in air is 343 m/s. answer in units of hz.
The frequency of the tuning fork is 256 Hz.
To calculate the frequency of the tuning fork, we need to use the formula:
f = v/2L
where f is the frequency of the sound wave, v is the speed of sound in air, and L is the length of the air column in the tube. When the water level is 30 cm below the top of the tube, the length of the air column is L1 = 30 cm. When the water level is 50 cm below the top of the tube, the length of the air column is L2 = 50 cm.
To find the frequency, we can set up an equation with the two lengths and solve for f:
f = v/2L1 = v/2L2
Substituting in the values for v, L1, and L2, we get:
f = (343 m/s)/(20.3 m) = (343 m/s)/(20.5 m) = 256 Hz
Therefore, the frequency of the tuning fork is 256 Hz.
To know more about sound waves refer here:
https://brainly.com/question/21995826#
#SPJ11
is it a b c d i think it is b but im not to sure
Answer:
D
Explanation:
the answer is D
the first three quantum numbers describe the a particular electron is in whereas the fourth quantum number describes the of an electron. (True or False)
The statement "the first three quantum numbers describe the orbital a particular electron is in, whereas the fourth quantum number describes the spin of an electron" is True.
Here's a step-by-step explanation:
1. The first quantum number, called the principal quantum number (n), determines the energy level and size of the electron's orbital. As n increases, the electron's energy and the average distance from the nucleus also increase.
2. The second quantum number, known as the azimuthal quantum number (l), defines the shape of the orbital. The possible values of l range from 0 to n-1. Each value corresponds to a different orbital shape, which are commonly referred to as s, p, d, and f orbitals.
3. The third quantum number, the magnetic quantum number (m_l), specifies the orientation of the orbital in space. The possible values of m_l range from -l to +l, including zero. Each value represents a different orientation for the given orbital shape.
4. The fourth quantum number, called the spin quantum number (m_s), describes the spin of the electron within the orbital. Electrons can have one of two possible spin values, +1/2 or -1/2, often referred to as "spin-up" and "spin-down."
In summary, the first three quantum numbers (n, l, and m_l) define the orbital in which an electron resides, while the fourth quantum number (m_s) describes its spin.
To know more about quantum, visit:
https://brainly.com/question/28943816
#SPJ11
when two waves with equal and opposite amplitude interfere what will the resulting amplitude measure
When two waves with equal and opposite amplitude interfere, the resulting amplitude will be zero.
This is known as destructive interference. When two waves with equal amplitude but opposite phase (i.e., one wave is at its peak while the other is at its trough) meet at the same point in space, their individual amplitudes will cancel each other out, resulting in a total amplitude of zero. This can occur when waves are perfectly out of phase with each other, meaning that the crest of one wave meets the trough of the other wave. In this scenario, the amplitude of the resulting wave will be the difference between the amplitudes of the two original waves. However, when the waves have equal and opposite amplitudes, they will completely cancel each other out and the resulting amplitude will be zero. This is an important concept in wave theory and has practical applications in fields such as acoustics and optics.
Learn more about amplitude here:
https://brainly.com/question/8662436
#SPJ11
two vectors 6N and 8N respectively are inclined at angle 30 degrees to each other. find the magnitude of their resultant vector and the direction of their resultant vector
The direction of the resultant vector is approximately 19 degrees from the 6 N vector and 26 degrees from the 8 N vector.
What is Vector?
In physics, a vector is a mathematical quantity that has both magnitude and direction. It is represented by an arrow, where the length of the arrow represents the magnitude of the vector and the direction of the arrow represents the direction of the vector. Vectors are used to represent physical quantities such as velocity, acceleration, force, and displacement, among others.
where c is the magnitude of the resultant vector, a and b are the magnitudes of the given vectors, and C is the angle between them.
In this case, a = 6 N, b = 8 N, and C = 30 degrees. Substituting these values into the equation, we get:
So the magnitude of the resultant vector is approximately 4.1 N.
To find the direction of the resultant vector, we can use the law of sines:
sin(A)/a = sin(B)/b = sin(C)/c
where A and B are the angles between the resultant vector and the given vectors.
In this case, we can choose A to be the angle between the 6 N vector and the resultant vector, and B to be the angle between the 8 N vector and the resultant vector. We already know that C = 30 degrees and c ≈ 4.1 N. Substituting these values into the equation, we get:
sin(A)/6 = sin(30)/4.1
sin(A) ≈ 0.325
A ≈ [tex]sin^{-1(0.325)}[/tex] ≈ 19 degrees
sin(B)/8 = sin(30)/4.1
sin(B) ≈ 0.433
B ≈ sin^-1(0.433) ≈ 26 degrees
Learn more about Vector
https://brainly.com/question/27854247
#SPJ1
What is the importance of physics in food science and technology?
Food science and technology generally consists of the production, preservation and consumption of food.
Physics, as a scientific subject, helps to explain and understand the underlying physical and chemical processes that occur during the aforementioned processes. Without physics, we as food scientists/engineers wouldn't understand concepts such as heat transfer, rheology (study of food deformation), thermodynamics, transport phenomena and food spectroscopy.
In summary, physics plays an important role in food science and technology by helping to understand and control the physical and chemical processes that occur during food production, preservation, and consumption, which allows food scientists to make better quality and safe food products.
the calculation of relative quantities of reactants, products, and energy in a chemical reaction is called
The calculation of relative quantities of reactants, products, and energy in a chemical reaction is called a detailed stoichiometric calculation.
The calculation of relative quantities of reactants, products, and energy in a chemical reaction is called stoichiometry. In stoichiometry, you can determine the proportions of substances involved in a chemical reaction using balanced chemical equations and mole ratios.
This allows you to predict the amount of product formed or the amount of reactant needed for a specific reaction.
To know more about stoichiometry visit :
https://brainly.com/question/30215297
#SPJ11
The earth is negatively charged, carrying 500,000 C of electric charge. This results in a 300 kV potential differencebetween the earth and the positively-charged ionosphere. What is the capacitance of the earth-ionospheresystem?
Since capacitance is a scalar quantity and cannot be negative, the capacitance of the Earth-ionosphere system is 1.67 Farads
The Earth is negatively charged, carrying a total electric charge of -500,000 Coulombs (C). There is a potential difference of 300,000 Volts (300 kV) between the Earth and the positively charged ionosphere.
In order to determine the capacitance of the Earth-ionosphere system, we will use the formula for capacitance:
C = Q/V
where C represents capacitance, Q is the charge, and V is the potential difference. Plugging in the given values:
C = (-500,000 C) / (300,000 V)
C = -1.67 Farads
. Keep in mind that this is a simplified model of the Earth-ionosphere system, but it provides a useful estimation of its capacitance.
To learn more about ionosphere click here
brainly.com/question/30764330
#SPJ11
how are wavelength, frequency, and energy related for photons of light? how are wavelength, frequency, and energy related for photons of light? there is no simple relationship because different photons travel at different speeds. longer wavelength means higher frequency and higher energy. longer wavelength means lower frequency and higher energy. longer wavelength means higher frequency and lower energy. longer wavelength means lower frequency and lower energy.
Wavelength, frequency, and energy are all related to photons of light. Photons are the smallest unit of light and they have a unique relationship between their wavelength, frequency, and energy.
The wavelength of a photon determines its color, and the frequency of the photon determines its energy. A longer wavelength means lower frequency and lower energy, while a shorter wavelength means higher frequency and higher energy.
This relationship is known as the wave-particle duality, which suggests that photons behave both as particles and waves. The energy of a photon is directly proportional to its frequency, which means that higher frequency photons have higher energy.
This is why ultraviolet light, which has a higher frequency, is more dangerous to humans than visible light, which has a lower frequency.
Understanding the relationship between wavelength, frequency, and energy is important for various applications, including in the development of lasers, telecommunications, and medical imaging.
To know more about Wavelength refere here:
https://brainly.com/question/13533093#
#SPJ11
what is the equation for lenses in contact (have negligible distances between them)?how are lenses that are NOT in contact considered? How do you determine the magnification?
The equation for lenses in contact is simply the sum of the individual lens focal lengths, which is given by:
1/f = 1/f1 + 1/f2
Where f is the combined focal length, f1 is the focal length of the first lens, and f2 is the focal length of the second lens.
For lenses that are not in contact, the equation is more complex and depends on the distance between the lenses. One common approach is to use the thin lens equation for each lens separately, and then apply the formula for thin lens combinations to determine the overall focal length.
To determine the magnification of an optical system, you need to know the object distance (d0), the image distance (di), and the height of the object (h0). The magnification (M) is then given by:
M = -(di/d0) = (h0/hi)
where hi is the height of the image. A negative magnification indicates an inverted image, while a positive magnification indicates an upright image.
To learn more about magnification https://brainly.com/question/27872394
#SPJ11
A light beam travels at 1.94×108 in quartz. The wavelength of the light in quartz is 355 .
Part A
What is the index of refraction of quartz at this wavelength?
=
Part B
If this same light travels through air, what is its wavelength there?
=
The wavelength of the light in air is 243 nm.
The refractive index of air is 1.00,
while the refractive index of quartz is 1.46.
Part A
To determine the wavelength of a light beam in air, we need to use the concept of refraction. Refraction is the bending of light as it passes from one medium to another, and it is determined by the refractive indices of the two media. The refractive index of air is 1.00, while the refractive index of quartz is 1.46.
Using Snell's law, we can relate the angles of incidence and refraction, as well as the refractive indices of the two media:
n1sinθ1 = n2sinθ2
where n1 and n2 are the refractive indices of the first and second media, respectively, and θ1 and θ2 are the angles of incidence and refraction.
In this case, we can assume that the angle of incidence is zero, since the light beam is traveling perpendicular to the interface between quartz and air. Therefore, we can simplify Snell's law to:
n1 = n2sinθ2
Part B:
We know that the refractive index of air is 1.00, and we want to find the wavelength of the light in air, which we can call λair. We also know the wavelength of the light in quartz, which we can call λquartz, and the refractive index of quartz, which is 1.46.
Using the formula for the refractive index, we can write:
1.46 = λquartz/λair
Solving for λair, we get:
λair = λquartz/1.46 = 355/1.46 = 243 nm
Therefore, the wavelength of the light in air is 243 nm.
To know more about wavelength click here:
https://brainly.com/question/7143261
#SPJ11
we can see other people because people group of answer choices emit visible light. emit thermal radiation. reflect visible light. emit infrared light. reflect infrared light.
We can see other people because they reflect visible light.
When light hits an object, some wavelengths are absorbed and some are reflected. The wavelengths that are reflected are what we see as color. In the case of people, the visible light that hits their skin is reflected back to our eyes, allowing us to see them.
People do also emit some infrared radiation, but this is not what allows us to see them. Instead, infrared radiation is used in thermal imaging, which can detect differences in temperature between objects.
We can see other people because they reflect visible light. Visible light is a part of the electromagnetic spectrum that our eyes can detect. When a light source, such as the sun or an artificial light, illuminates an object like a person, the object reflects some of this visible light. Our eyes then perceive this reflected light, and our brain processes the information to form an image of the person. In contrast, thermal radiation and infrared light are not visible to the human eye, so they don't contribute to our ability to see other people.
To know more about visible light, visit:
https://brainly.com/question/7071188
#SPJ11
what do meteorites reveal about the solar system? group of answer choices they reveal that the solar system once contained 10 planets. they reveal that the age of the solar system is approximately 4.6 billion years. they reveal that the early solar system consisted mostly of hydrogen and helium gas. nothing, because they come from other star systems.
The meteorites reveal about the solar system (b). they reveal that the age of the solar system is approximately 4.6 billion years is the correct option.
The history and make-up of the solar system can be learned a lot from meteorites, which are pieces of asteroids or comets that have fallen to Earth. Scientists can discover information about the creation of the solar system and its antiquity by researching meteorites.
According to radiometric dating methods, one of the major conclusions from meteorite research is that the solar system is thought to be about 4.6 billion years old. This age is calculated by looking at the isotopic ratios of specific elements in meteorites, which can tell us when they were formed.
Additionally, meteorites provide details on the early solar system's makeup. They include a variety of minerals and elements, including some of the most important ones.
Therefore, the correct option is (b).
To know more about 4.6 billion years
https://brainly.com/question/11160373
#SPJ4
for comparison, what is the magnitude of the acceleration a test tube would experience if dropped from a height of 1.0 m and stopped in a 1.5- ms -long encounter with a hard floor? express your answer with the appropriate units.
If the test tube were to be dropped from a height of 1.0 m and then come to a stop after 1.5 ms, its acceleration (a) is around 0.889 m/s².
The following formula can be used to determine the acceleration (a) of a test tube that was dropped from a height (h) of 1.0 m and came to a stop in contact with a hard floor after 1.5 ms:
a = 2h/t²
Where t is the length of time before contact with the ground and h is height.
Assumed: Height (h) = 1 m
Time (t) = 1.5 ms = 1.5 x 10⁻³s.
Adding these values to the formula will produce:
a = 2 x 1.0 / (1.5 x 10⁻³)²
a = 2 x 1.0 / 2.25 x 10⁻⁶
a = 0.8888 m/s²
Therefore, if the test tube were to be dropped from a height of 1.0 m and then come to a stop after 1.5 ms, its acceleration (a) would be around 0.889 m/s².
To know more about acceleration
https://brainly.com/question/14892261
#SPJ4
This theory states that Earth's plates move on top of the mantle at a slow and
constant rate due to convection currents
Answer:
The theory of plate tectonics proposes that the Earth's outer layer, or lithosphere, is broken up into a number of large plates that interact with one another. These plates are slowly moving across the Earth's surface, driven by convection currents in the mantle below.
The mantle is the layer of the Earth that lies beneath the crust, and it is made up of hot and viscous rock. At certain depths, the mantle rock can become partially molten, and this creates convection currents. These currents are driven by the heat difference between the deeper, hotter parts of the mantle and the cooler, shallower regions.
As these convection currents move, they push against the base of the lithosphere, which is divided into several plates. The interaction between these plates creates a variety of geological features, including mountain ranges, volcanoes, and earthquakes.
The movement of the plates is hardly noticeable in human terms, with rates of movement averaging to just a few centimeters per year. However, over millions of years, these small movements can add up, leading to significant changes in the Earth's geography and climate. For example, the collision of two plates can result in the formation of a mountain range, while the separation of two plates can create a new ocean basin.
Detailed observations of the structure of the milky way are difficult because:________
Detailed observations of the structure of the Milky Way are difficult because our position within the galaxy obstructs our view of certain regions, such as the galactic center. Additionally, the presence of interstellar dust clouds and the limitations of current technology make it challenging to collect comprehensive data on every star and structure within the Milky Way.
Detailed observations of the structure of the Milky Way are difficult because:
1. Our solar system is located within the Milky Way, which makes it challenging to get a comprehensive view of the entire galaxy.
2. The presence of dust and gas in the Milky Way obstructs our view, causing difficulties in observing distant stars and structures.
3. The sheer size of the Milky Way, with its billions of stars, makes it difficult to study its overall structure in detail.
These factors contribute to the challenges in making detailed observations of the Milky Way's structure.
To know more about Milky Way visit:
https://brainly.com/question/29910680
#SPJ11
