This is the portion of the electromagnetic spectrum that has a frequency just above that of visible light.

Answer: Additive

Additive primary colors are blue red and green

Red, blue and green are called Additive primary colors which is known as colours of spectrum.

Explanation:

A set of colors that are joined to produce some useful colors are known as Primary colors. Red, blue and green colors will not be formed by adding or combining other colors. Blue, green and red are called primary colors and these colors can be combined to generate various colors.  

When the colors yellow and cyan are added it generates a green shade. When the same yellow color is added with magenta it will generate shades of red. Cyan, Magenta, yellow and Black be used to generate color space.  

Answer:

Hi,

The correct answer option is (B)The solute raises the boiling point of the solvent

Explanation:

Boiling point of a solvent is affected by the number of particles in a solution.Adding a solute to a solvent increases its boiling point because it lowers the vapor pressure of the solution.This is all about colligative properties where a decrease in vapor pressure will mean more heat needed to heat the solution to a boiling point.

All the best.

The true statement is that a solute raises the boiling point of a solvent. This is known as boiling point elevation. In contrary a solute will decrease the freezing point of a solvent and increase its conductivity.

When a solute is dissolved in a solvent it affects the properties of the solvent. The true statement from the given choices is option B - The solute raises the boiling point of the solvent. The process is called boiling point elevation. It's a colligative property meaning it relies on the number of dissolved particles in solution regardless of their nature. For example, when salt (solute) is added to water (solvent) the water’s boiling point increases.

Option A is incorrect because in actuality, a solute decreases the freezing point of a solvent. The solvent does not decrease the conductivity of the solute (Option C) but instead dissolution often increases conductivity.

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C bc read the question

Only a concave mirror can produce an enlarged image, provided the object distance is less than the radius of curvature is correct about spherical mirrors.

A spherical mirror is a mirror whose reflecting surface is part of a hollow sphere of glass. The spherical mirrors are of two types: concave mirrors and convex mirrors.

A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex or concave. Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices.

Some applications of convex mirror are sunglasses, rear view mirrors, shaving mirror,etc. Some applications of concave mirrors are reflectors, converging of light, solar cooker etc.

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The location of the center of our Galaxy was first determined by observations of Globular Clusters

Opaque materials absorb all the light that shines on them.  None of it comes out the other side.  That's why they're opaque.

Opaque materials become warmer when light shines on them, because they absorb the energy carried by the light that shines on them.  (According to the law of Conservation of Energy, that energy has gotta go somewhere.)

Opaque materials become warmer when light shines on them due to the absorption of light energy by the atoms and molecules of the material.

Opaque materials become warmer when light shines on them due to the absorption of light energy. When light hits an opaque material, the photons from the light wave interact with the atoms and molecules of the material. These interactions cause the atoms and molecules to vibrate, generating heat energy and resulting in an increase in temperature.

For example, when sunlight shines on a black, opaque surface, the surface absorbs most of the light energy. The absorbed energy causes the atoms and molecules of the surface to vibrate, leading to an increase in temperature.

In contrast, transparent materials, such as glass, allow light to pass through them without significant absorption. As a result, they do not become as warm when light shines on them.

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Answer: Net Force, also is referred to as Resultant Force

Answer: The force is resultant force

Explanation:

The sum of all the forces applied to an object which usually separated into a horizontal and vertical component is its "resultant". This resultant force is a single force that act in terms of all other forces acting on an object or body combined together. It is always opposite the equilibrant in a system of forces.

Answer:

D 13.0mi, dir 22.6° north of east

Explanation:

Total movement east is 7+5 miles, or 12 miles. Total movement north is 2+3 miles, or 5 miles. The total displacement, as the crow flies, is of [tex]\sqrt{12^2+5^2} =13[/tex]miles. The angle is the inverse tangent of north/east, or [tex]tan^{-1} \frac 5 {12} =22.62°[/tex]

Answer:

521 nm

Explanation:

Given the values and units we are given, I'm assuming  5.76*10^14 Hz is frequency.

The formula to use here is λ * υ = c, where λ is wavelength, υ is frequency, and c is the speed of light.

λ = [tex]\frac{3*10^8\frac{m}{s} }{5.76*10^{14}Hz} = {5.20833*10^{-7} m}\approx{521 *10^{-9}m}={521 nm}[/tex]

Answer:

Yes.

Explanation:

Answer:

Layer C

Explanation:

The Principle of faunal succession also is the study of fossils

Their for making the answer A

Final answer:

A battery stores electrical energy via chemical reactions that release electrical energy to move electrons in a circuit when connected.

Explanation:

The most accurate description of how a battery stores electrical energy is through chemical reactions that occur within it when placed in a circuit. These chemical reactions convert chemical potential energy into electrical energy, which is then utilized to move electrons throughout the circuit.

This process increases the potential energy of the electrons, allowing them to do work, such as lighting a bulb or powering a motor. It is important to note that in electrochemical cells, or batteries, electrical energy is generated as a result of a chemical reaction between the reactants, resulting in products with less potential energy than the reactants. When a battery is connected to a circuit, its stored chemical energy is converted into electrical energy to "push" electrons through the circuit.

Answer:

D

Explanation:

The car turns slightly crossing the boundary because the amount of friction the car experiences on each surface is different, so the interaction between the car and the surface changes, which pushes the car slightly to the left or right. Hence, option (d) is correct.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

The resistance provided by surfaces in touch as they move past one another is known as friction. To walk without slipping, traction is provided by friction. In most situations, friction is advantageous. They do, however, give a strong amount of opposition to the move.

When the  toy car change direction when crossing a boundary between two surfaces, such as hard plastic and a carpet, the frictional force get changed. So, the interaction between the car and the surface changes, which pushes the car slightly to the left or right. Hence option (D) is correct.

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An object is lifted from the surface of a spherical planet to an altitude equal to the radius of the planet.  

As a result, the object's mass remains the same, and its weight decreases to 1/4 of whatever it is when the object is on the planet's surface.

Answer:

37.65

Explanation:

50/4 + 74/2

If a train travels 50 kilometers in 4 hours, and then 74 kilometers in 2 hours its average speed is 24.75 km / hr.

Explanation:

Speed is related to the ratio of distance and time. Speed = Distance / time.

Speed of the first train = 50 / 4 = 12.5 km / hr

Speed of the second train = 74 / 2 = 3 7 km / hr

Average speed = (12.5 + 3 7 ) / 2 = 24.75 km / hr

So the average speed of the train is 24.75 km / hr.

answer:

heating the material

placing the material in a magnetic field of opposite polarity

hitting the material

Answer: heating, placing in a strong magnetic field, Placing in an electric field.

Explanation: Placing the material in an electric field.

Heating the material. Raising the temperature of the material.

Place the material in a magnetic field that is basically of opposite polarity.

Physically hitting of the material.

Answer:

i think d

Explanation:because concave and convex mirrors have f negative value

Answer:

B and D   ( c )

Explanation:

The optical devices that have f ( focal length ) as negative is the diverging lens ( image b ) and a convex mirror ( image d ).

An optical device is said to have a negative focal length when the image been focused or viewed on it appears on the same side as with the object been viewed as this is observed  when images are viewed through a diverging lens ( image b ) and also when an image is viewed through a convex mirror ( image d ). when an image is viewed through an optical device and the image appears on the opposite side the optical device is a said to have a positive focal length ( f )  

the negative f ( focal length ) means that the focal point of the optical device is on the same side of the lens as with where the object is placed

Answer:

A

Explanation:

Answer:

The maximum height of soccer ball  is 12.25 ft.

Explanation:

You know: H(t) = −16t² + vt + s

First you must know the value of the constant "s". For this you know that at the beginning, at time t = 0, the initial height H (0) is zero. Also, you know that the speed v is 28 feet per second. So:

H(0)=-16*0² + 28*0 + s

0=-16*0² + 28*0 + s

0=s

Then, the speed expression is determined as:

H(t) = −16t² + 28*t

The vertex is a point that is part of the parabola, which has the value as ordered  minimum or maximum function. At that point an imaginary axis can be drawn that makes  symmetric the graph of the function, which is called the axis of symmetry.

Being the parabola:  f(x)=a*x² + b*x + c

the vertex is calculated as: [tex](x,y)=(\frac{-b}{2*a} ,f(\frac{-b}{2*a}))[/tex]

In this case,  the point "x" of the vertex indicates the time at which the soccer ball reaches the maximum "y" height ( The vertex is at a maximum point of the function.) So, being a=-16 and b=28, the vertex is:

[tex]x=\frac{-b}{2*a} =\frac{-28}{2*(-16)}[/tex]

x=0.875

H(0.875)=-16*(0.875)²+28*(0.875)=12.25

The maximum height of soccer ball  is 12.25 ft.

a. 0.5 T

- The amplitude A of a simple harmonic motion is the maximum displacement of the system with respect to the equilibrium position

- The period T is the time the system takes to complete one oscillation

During a full time period T, the mass on the spring oscillates back and forth, returning to its original position. This means that the total distance covered by the mass during a period T is 4 times the amplitude (4A), because the amplitude is just half the distance between the maximum and the minimum position, and during a time period the mass goes from the maximum to the minimum, and then back to the maximum.

So, the time t that the mass takes to move through a distance of 2 A can be found by using the proportion

[tex]1 T : 4 A = t : 2 A[/tex]

and solving for t we find

[tex]t=\frac{(1T)(2 A)}{4A}=0.5 T[/tex]

b. 1.25T

Now we want to know the time t that the mass takes to move through a total distance of 5 A. SInce we know that

- the mass takes a time of 1 T to cover a distance of 4A

we can set the following proportion:

[tex]1 T : 4 A = t : 5 A[/tex]

And by solving for t, we find

[tex]t=\frac{(1T)(5 A)}{4A}=\frac{5}{4} T=1.25 T[/tex]

The time it takes for the mass to move through a distance of 2A is 2 times the period T, and the time it takes for the mass to move through a distance of 5A is 5 times the period T.

In terms of T, the time it takes for the mass to move through a total distance of 2A is:

t/T = 2

The time it takes for the mass to move through a total distance of 5A is:

t/T = 5

These equations show that the time it takes for the mass to move through a total distance is proportional to the number of times the amplitude is covered. Therefore, if the distance is 2A or 5A, it will take 2 or 5 times the period T, respectively.

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Answer:

0.39

Explanation:

In order not to slide, you must have exactly the same acceleration of the train:

[tex]a=0.39 g[/tex]

where

g = 9.81 m/s^2

There is only one force acting on you: the static frictional force that "pulls" you forward, and it is given by

[tex]F_s = \mu_s mg[/tex]

According to Newton's second law, the net force acting on you (so, the frictional force) must be equal to your mass times the acceleration, so we have

[tex]F= ma = \mu_s mg[/tex]

from which we find

[tex]\mu_s = \frac{a}{g}=\frac{0.39 g}{g}=0.39[/tex]

so, the minimum coefficient of static friction must be 0.39.

The minimum coefficient of static friction required to prevent slipping on a train accelerating at 0.39g must be equal to or greater than 0.39.

To calculate the minimum coefficient of static friction required to prevent you from sliding on a train accelerating at 0.39g (where g is the acceleration due to gravity), you need to understand the relationship between static friction (Fs) and the normal force (N). Let's denote the coefficient of static friction as μs. The maximum force of static friction (μsN) should be equal to or greater than the force needed to overcome the train's acceleration to avoid slipping.

Since the acceleration of the train is 0.39g, and g is 9.81 m/s² (the acceleration due to gravity), the force due to the train's acceleration can be expressed as 0.39 × your mass × g. Considering that your mass × g gives us the normal force (N), the equation to avoid slipping becomes:

Fs ≥ 0.39 × N

Substituting the force of static friction equation (Fs = μs × N), we get:

μs × N ≥ 0.39 × N

Since N appears on both sides of the inequality, they cancel each other out, and you are left with:

μs ≥ 0.39

This means the minimum coefficient of static friction must be 0.39 or greater to prevent sliding.

Radio waves are a type of electromagnetic radiation with wavelengths between 10 m to 10,000 m. In the electromagnetic spectrum this wavelength is longer than infrared light and therefore, it goes beyond the visible spectrum.

This type of electromagnetic waves is very well reflected in the ionosphere, the layer of the atmosphere through which they travel directly or using repeaters.

In addition, they are very useful to transport information, being important in telecommunications. They are used not only for conventional radio transmissions but also in mobile telephony and TV.

It should be noted that since radio signals have large wavelengths, they can be diffracted around certain obstacles, such as hills and mountain ranges, preventing the signal from reaching its destination.

The following symbol is used to represent cell (batery) in a circuit diagram.

D is correct

+ - is battery

you got right

The photoelectric effect consists of the emission of electrons (electric current) that occurs when light falls on a metal surface under certain conditions.

If the light is a stream of photons and each of them has energy, this energy is able to pull an electron out of the crystalline lattice of the metal and communicate, in addition, a kinetic energy.

This is what Einstein proposed:  

Light behaves like a stream of particles called photons with an energy

[tex]E=h.f[/tex]  (1)

So, the energy [tex]E[/tex] of the incident photon must be equal to the sum of the Work function [tex]\Phi[/tex] of the metal and the kinetic energy [tex]K[/tex] of the photoelectron:

[tex]E=\Phi+K[/tex]  (2)

Where [tex]\Phi[/tex] is the minimum amount of energy required to induce the photoemission of electrons from the surface of a metal, and its value depends on the metal.

In the case of Copper [tex]\Phi=4.7eV[/tex]

Now, applying equation (2) in this problem:

[tex]E=4.7eV+1.10eV[/tex]  (3)

[tex]E=5.8eV[/tex]  (4)

Now, substituting (1) in (4):

[tex]h.f=5.8eV[/tex]  (5)

Where:

[tex]h=4.136(10)^{-15}eV.s[/tex] is the Planck constant  

[tex]f[/tex] is the frequency  

Now, the frequency has an inverse relation with the wavelength [tex]\lambda[/tex]:  

[tex]f=\frac{c}{\lambda}[/tex] (6)  

Where [tex]c=3(10)^{8}m/s[/tex] is the speed of light in vacuum  

Substituting (6) in (5):

[tex]\frac{hc}{\lambda}=5.8eV[/tex]   (7)

Then finding [tex]\lambda[/tex]:  

[tex]\lambda=\frac{hc}{5.8eV } [/tex]   (8)

[tex]\lambda=\frac{(4.136(10)^{-15} eV.s)(3(10)^{8}m/s)}{5.8eV }[/tex]    

We finally obtain the wavelength:

[tex]\lambda=213^{-9}m=213nm[/tex]    

In this example of the photoelectric effect, the maximum kinetic energy of ejected electrons from a copper surface is given. By using this kinetic energy, Planck's constant, and the work function energy for copper, a calculation can be made to determine the frequency of the incident light. From that frequency, another calculation can determine the corresponding wavelength of the light.

This question relates to the photoelectric effect in physics. In essence, the photoelectric effect is a process where electrons are ejected from a material when electromagnetic (EM) radiation is incident on it. The process is explained by the energy of photons, which are quanta of EM radiation, interacting with individual electrons.

A key equation in understanding this interaction is E = hf, where E is the energy of the photons, h is Planck's constant, and f is the frequency of the radiation. Now, the maximum kinetic energy (KEmax) of the ejected electrons is given by, KEmax = hf - BE, where BE represents the binding energy or work function of the electron to the copper surface.

Given that the maximum kinetic energy KEmax is 1.10 eV (electron-volts), and knowing that Planck's constant h is approximately 4.136 x 10^-15 eV/s, we can rearrange the equation to solve for the frequency f -> f = (KEmax + BE) / h. We need the work function or binding energy BE for copper, which is typically around 4.7 eV. Plug all the values into the equation to get the frequency f.

Furthermore, frequency f and wavelength λ are related by the equation c = fλ, where c is the speed of light (~3.0 x 10^8 m/s). Rearranging that equation for λ -> λ = c / f provides the setup to solve for the wavelength of the light used in the photoelectric effect experiment with copper.

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A) Upward

In order to find the direction of the magnetic force on the wire, we can use the right-hand rule: the index finger, the middle finger and the thumb of the right hand must be placed all of them perpendicular to each other.

So we have:

- Index finger: direction of current in the wire (from west to east)

- Middle finger: direction of magnetic field (from south to north)

- Thumb: direction of the force --> so it will be upward

So, the force will point upward.

B) [tex]1.82\cdot 10^{-4}N[/tex]

The magnitude of the force exerted by the magnetic field on the wire is given by

[tex]F=ILB[/tex]

where

I = 1.50 A is the current in the wire

L = 2.20 m is the length of the wire

[tex]B=0.550 G = 0.55 \cdot 10^{-4}T[/tex]

Substituting into the equation, we find

[tex]F=(1.50 A)(2.20 m)(0.55 \cdot 10^{-4} T)=1.82\cdot 10^{-4}N[/tex]

Final answer:

The force exerted by the Earth's magnetic field on a wire carrying current from west to east is directed upwards. To determine the magnitude of the force, use the formula F = I × L × B × sin(θ) and calculate it to be approximately 0.1815 mN, where I represents current, L length, and B magnetic field.

Explanation:

The student's question involves finding the direction and magnitude of the force exerted by the Earth's magnetic field on a current-carrying wire oriented from west to east. To solve this, we use the right-hand rule for the direction and the formula F = I × L × B × sin(θ) for the magnitude.

Force Direction

Part A asks for the direction of the force. We apply the right-hand rule which indicates that if you point your thumb in the direction of current (from west to east, which is left to right) and your fingers in the direction of the magnetic field (from south to north, or bottom to top), your palm will face towards the direction of the force exerted on the wire. As the current flows from west to east and the Earth's magnetic field goes from south to north, the force on the wire will be directed upwards.

Force Magnitude

Part B asks for the magnitude of the force. The formula we use is F = I × L × B × sin(θ), where F is the force, I is the current (1.50 A), L is the length of the wire (2.20 m), B is the magnetic field, which should be converted from gauss to tesla (1 gauss = 1×10⁻⁴ tesla, so 0.550 gauss = 5.50×10⁻⁵ T), and θ is the angle between the wire and the magnetic field (90° here). With these values, we can calculate the force.

Let's calculate the force:
F = 1.50 A × 2.20 m × 5.50 × 10⁻⁵T × sin(90°)
F = 1.50 × 2.20 × 5.50 × 10⁻⁵ N
F = 0.1815 × 10⁻³ N
F ≈ 0.1815 mN

Answer:

The three laws of motion were first compiled by Isaac Newton in his Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687.

Explanation:

Sound waves travel faster through solids than they do through gases or liquids.  (C)  They don't travel through vacuum at all.

Example:

Speed of sound in normal air . . . around 340 m/s

Speed of sound in water . . . around 1,480 m/s

Speed of sound in iron . . . around 5,120 m/s

When two charges of opposite sign are placed near each other, the electric potential energy decreases while the kinetic energy increases.

When two charges of opposite sign are placed near each other, the electric potential energy, kinetic energy, and work change in specific ways. Initially, the charges have potential energy due to their position in the electric field. As they move closer together, the potential energy decreases, and this decrease is converted into kinetic energy.

The work done on the charges is negative because energy is being taken away from the system. In other words, the charges are pulling on each other and you need to do work to bring them closer. Overall, the potential energy decreases, and the kinetic energy increases.

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When two charges of opposite sign are placed near each other, the electric potential energy decreases while the kinetic energy increases. Work is done as the charges are brought near each other.

When two charges of opposite sign are placed near each other, the electric potential energy changes. The potential energy decreases as the charges approach each other, resulting in a decrease in potential energy. As the potential energy decreases, the kinetic energy of the charges increases. This is because the electric field between the charges accelerates the charges, converting their potential energy into kinetic energy. Lastly, work is done when the charges are brought near each other, as the electrostatic force between the charges can do work on the charges.

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To see which way atmospheric conditions and meteorological phenomena are moving, and how fast.

Also to see whether they were correct yesterday.

Answer:

Meteorologists would compare a new weather map with one 24 hours old to see how fast a front is moving because the United States is very large, a large number of station models help give a more complete picture of the weather and make weather forecasts more accurate.

Explanation:

100%

Answer:

Pushing magma up through the interior of earth

Explanation:

Final answer:

The direction and interaction of a magnetic force on a moving electric charge in a magnetic field.

Explanation:

The statements that are true regarding a magnetic force acting on an electric charge in a uniform magnetic field are:

Therefore, statements 1, 2, 3, and 4 are true.

In order to find the density of the rock, the student should follow the steps highlighted below.

Steps in determining density of a rock

Weigh the rock using a scale to find out how heavy it is in grams. Ensure that the measurement is very precise.

Find out how much space the rock takes up: There are a few ways to figure out how big an irregularly shaped object, like a rock, is. There are two usual ways:

"Use water to measure volume: Pour water into a cylinder and write down how much there is at the start. " Gently put the rock in the water, and make sure there are no air bubbles stuck.

Find out how much water the rock is pushing out of the way now. Subtract the starting volume from the ending volume to find the volume of the rock.

Archimedes' principle: First, weigh the rock in the air. Then, weigh it again when it's completely underwater. The change in weight when a rock is in water is the same as the weight of the water that the rock pushes aside. Find the volume of the rock by dividing its weight by the density of water, which is usually 1 gram per cubic centimeter.

To find the density of a rock, divide its mass (in grams) by its volume (in cubic centimeters or milliliters). Density = Mass / Volume

Density is the amount of mass in a certain amount of space. It is calculated by dividing the amount of mass by the amount of space it takes up.

Ensure that the measurements for mass and volume are the same (like both in grams or both in kilograms, both in cubic centimeters or both in milliliters).

After calculating the density, write it in the right units. Density is usually measured in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).