what term identifies how many colors can be displayed on a screen?

Answer:

a. 24 kg m/s

b.  3/5s

Explanation:

a.impulse is the change in momentum so at first the momentum is zero because the ball was at rest and the final momentum is 1.2kg*20m/s=24 kg m/s

so the impulse would be (24-0) kg m/s=24 kg m/s

b. so the impulse equation is impulse is force *delts time

so 24 kg m/s=40N*t

t=24 kg m/s /40N=3/5 s

As they release less heat, compact fluorescent bulbs use less energy while still producing as much light as incandescent bulbs.

In addition to having a lengthier lifespan than incandescent bulbs, fluorescent bulbs are also more affordable in the long run. In comparison to incandescent bulbs, fluorescent bulbs are generally a more effective and sustainable option for illumination.

This comprises of a wire filament that glows when heated by an electric current.

Compact fluorescent bulbs can generate more light than incandescent bulbs while using less energy because an incandescent bulb emits more heat energy.

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Answer:

4,000

Explanation:

Answer:

2000

Explanation:

Answer:

THY ANSWER IS G..

Can you please give me brainliest??

Explanation:

The Speed of the car that has beat frequency is 23.1m/s.

A car is moving directly toward a vertical, sheer wall. The driver depresses the horn, which emits sound at a frequency of 580 Hz, and hears a beat frequency of 32 Hz between that beat frequency and the sound reflected off the wall.

The apparent shift in the frequency of the light that the observer perceives as a result of relative motion between the source of the light and the observer is known as the Doppler effect of light.

However, for sound waves, the equations for the Doppler shift vary significantly depending on whether the source, the observer, or the air is moving.

Light doesn't need a medium to travel, and the observer and source's relative speeds are the only factors that affect the Doppler shift for light traveling in a vacuum.

\(v=\frac{Vx}{Vx-Vy} f\)

580 x 22/580-32=23.1m/s

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Answer: The answer is in your heart

Explanation: I don't know, just trust °_°

It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

The electron affinity of the neutral atom of the element can show indicate whether or not the element is going the make positive or negative ions.  The higher the electron affinity is, the more the neutral atom wants to gain electrons.

The electron affinity for alkali metals and alkaline earth metals are low due to the fact that they are located on the left of the periodic table and only needs to loose 1 or 2 electrons to have a completed valence shell.

That means that they want to form cations (loose electrons).  Halogens have a high electron affinity since they are located on the right of the periodic table and only have to gain 1 electron to get a completed valence electron configuration.  That means that it forms anions.

Therefore, It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

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Answer:

The frequency of the sound wave is 800Hz

The speed of sound in a is about 340m/s.

Velocity = frequency x wavelength

making wavelength the subject formula

wavelength = Velocity/frequency.

wavelength = 340/800

wavelength = 0.425m.

A steel wire 4.5 m long stretches 0.15 cm when it is given a tension of 370 N. then the diameter of the wire is 2.6 × 10⁻³ m.

Given,

length of the wire L = 4.5 m

elongation l = 0.15 cm = 0.15 × 10⁻² m

restoring force F = 370 N

In this problem young's modulus of the wire is not given, consider the young's modulus of the wire is Y = 2 × 10¹¹ pa.

Youngs modulus Y = Fl ÷ AL

where A is cross sectional area of the wire,

Putting all the values

2 × 10¹¹ pa. = 370 N × 4.5 m ÷ A × 0.15 × 10⁻² m

A. = 370 N × 4.5 m ÷  2 × 10¹¹ pa × 0.15 × 10⁻² m

A = 5.55 × 10⁻⁶

πr² = 5.55 × 10⁻⁶

r = 1.32 × 10⁻³ m

Diameter d = 2r = 2 × 1.32 × 10⁻³ m = 2.6 × 10⁻³ m.

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Answer: No

Explanation:

Whenever light travelling on a straight line encounters obstruction, it diffracts and scatter.

Scattering of light occurs when light passes through a rough path or a diffused surface.

But in case of spectral diffusion, which is the fluctuation in spectroscopy as a result of time dependent frequency shifts.

Spectral diffusion occurs in particular molecules initiated by excessive excitation energy.

Fluctuation in frequency does not mean diffraction of light or particles

Therefore, spectral diffusion does not cause light to scatter.

Answer:

True

Explanation:

A loud noise cancels out

A loud noise gives off less energy than a quiet noise : False

Loudness is the intensity of sound heard in a given period. it is dependent on the amplitude of the sound waves.

The loudness of a sound is proportional to the square of the amplitude of the sound wave, meaning that the larger the amplitude of wave, the more the intensity and the more the sound.

Since waves carry energy along, it means a wave with a large amplitude transfers more energy and therefore loud sound.

In conclusion, the louder the sound the more energy it gives off and the quieter the sound the less energy it gives off.

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Answer:

The reason you feel weightless is because there is no force pushing against you, since you are not in contact with anything. Gravity is pulling equally on all the particles in your body. This creates a sensation where no forces are acting on you and you feel weightless.

The angle of repose or the angle of friction is the angle at which the block starts to slide down the inclined plane. By balancing the forces operating on the block along the inclination, it may be calculated.

The gravitational force (mg) acting downhill and the normal force (N) acting perpendicular to the inclination are the forces acting on the block. The gravitational force component perpendicular to the inclination, which is calculated as mg cos, where is the angle of the incline, and the normal force are identical in magnitude.

The block can have a maximum static friction force (Ff) applied to it without it sliding down the incline if:

Ff = μs N

where s is the static friction coefficient.

The amount of the frictional force is equal to the component of the gravitational force parallel to the inclination, which is mg sin, at the instant the block just starts to slide.

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If the wire is tipped at an angle of 15.0° with the horizontal, we need to determine the force it will now feel. The length of the wire that will be in the magnetic field is relevant to finding the answer.

When a wire carrying current is placed in a magnetic field, it experiences a force perpendicular to both the direction of current flow and the magnetic field. In this case, when the wire is tipped at an angle of 15.0° with the horizontal, only a component of the wire's length will be in the magnetic field.

To find the force, we need to consider the effective length of the wire in the magnetic field. This can be calculated by multiplying the actual length of the wire by the cosine of the angle between the wire and the magnetic field. Once we have the effective length, we can use the formula for the force on a current-carrying wire in a magnetic field, which is given by the equation F = BIL, where B is the magnetic field strength, I is the current, and L is the length of the wire in the field. By substituting the effective length into the equation, we can determine the force the wire will experience.

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Given equation

\(\\ \sf\longmapsto N_2+3H_2\longrightarrow 2NH_3\)

Nitrogen on product side:-

\(\\ \sf\longmapsto 2(1)=2\)

Hydrogen on reactant side:-

\(\\ \sf\longmapsto 3(2)=6\)

According to the question,

The Equation is

\( \sf \: N_2 + 3H_2 \: \longrightarrow2NH_3\)

Let's balance the equation (Excluded)

\(\sf \longmapsto \: N_2 + 3 H_2 = 2 NH_3\)

Hydrogen atoms on product side:

\(\sf \longmapsto2 \times 1\)

\(\sf \longmapsto \: 2\)

Nitrogen atoms on the reactant side:

\(\sf \longmapsto \: 3 \times 2\)

\(\sf \longmapsto \: 6\)

There fore,

Product side

\( \sf \: 2\)

Reactant side

\( \sf6\)

Answer:

a. 150 g/L

b. 75 g

c. 120 mL

Explanation:

a. 33g/0.22L=150 g/L

b. 33g/0.22L=150 g/L

150 g/L*0.5L=75g

c. 0.22L/33g=0.006667L/g

0.006667L/g*18g=0.12L

0.12L*1000=120mL

The addition of vectors allows to find the vector that the equilibrium is

                F = (40.02 i ^ - 49.95 j ^) N

Parameters given

To find

The force is a vector magnitude so the sum of the force must be done using the methods to add vectors.

One of the easiest methods to perform the addition of vectors is the analytical method where each vector is decomposed in a Cartesian system and the components added using algebraic summation and then the resulting vector is constructed.

We decompose the vector

                 cos θ = \(\frac{A_x}{A}\)Ax / A

                 sin θ = \(\frac{A_y}{A}\)

                 Aₓ = A cos θ

                 \(A_y\)= A sin θ

                 Aₓ = 64 cos 128.7

                 \(A_y\) = 64 sin 128.7

                 Aₓ = -40.02 N

                 \(A_y\) = 49.95 N

To find the vector that allows equilibrium, we work each axis independently

X axis

                 Aₓ + Fₓ = 0

                 Fₓ = - Aₓ

                 Fₓ = 40.02 N

Y axis

                  \(A_y + F_y =0 \\F_y = - A_y\\F_y = - 49.95 N\)

We can write the resulting vector in two ways

1) F = (40.02 i ^ - 49.95 j ^) N

2) in the form of module and angle

Let's find the module with the Pythagoras' Theorem

              F =\(\sqrt{F_x} ^2 + F_y^2)\\F = \sqrt{40.02^2 + 49.95^2 }\)  

              F = 64 N

Angles

              tan θ = \(\frac{F_y}{F_x}\)

              θ = tan⁻¹  \(\frac{F_y}{F_x}\)

              θ = tan⁻¹ \(\frac{-49.95}{40.02}\)

              θ = -51.3º

This angle is measured clockwise from the positive side of the x-axis

In conclusion using the sum of vectors we can find the vector that allows the equilibrium is

                F = (40.02 i^  - 49.95 j^ ) N

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The kinetic energy of the proton is 1.32 x 10⁻²¹ J.

The kinetic energy of a proton that is traveling at a speed of 3975 m/s can be calculated using the formula:
K = (1/2)mv²
Where K is the kinetic energy, m is the mass of the proton, and v is the velocity of the proton.

Kinetic energy is a form of energy that an object possesses by virtue of its motion. It is defined as the energy that an object possesses due to its motion, which is dependent on the object's mass and velocity
The mass of a proton is 1.67 x 10⁻²⁷ kg, and the velocity is given as 3975 m/s.

Plugging these values into the formula, we get:

K = (1/2)(1.67 x 10⁻²⁷ kg)(3975 m/s)²

K = 1.32 x 10⁻²¹ J

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Calculations based on cosmic microwave background radiation (CMB) temperature of 2.73 K:

a) photon energy density in the Universe

b) the estimated number of CMB photons that fall on the outstretched palm of a hand per second

c) average energy from CMB radiation landing on the outstretched palm per second

d) radiation pressure felt from CMB radiation.

Calculations based on cosmic microwave background radiation (CMB) temperature of 2.73 K:

a) The photon energy density in the Universe can be calculated using the Stefan-Boltzmann law, which relates the energy density of blackbody radiation to its temperature. Using this law, the photon energy density in the Universe is found to be approximately 0.26 eV/cm^3.

b) To estimate the number of CMB photons that fall on the outstretched palm of your hand every second, we need to calculate the number of photons passing through a unit area per second. This can be done using the formula for the photon energy density and the speed of light. The result is approximately 4 x 10^12 photons per second.

c) To calculate the average energy due to CMB radiation which lands on your outstretched palm every second, we divide the total energy falling on the palm per second by the number of photons calculated in part b. The result is approximately 6 x 10^-19 joules per photon.

d) The radiation pressure can be calculated using the formula for the radiation pressure of blackbody radiation. The result is very small, approximately 1.4 x 10^-6 Pa. This is much smaller than the pressure due to atmospheric air molecules and is not noticeable in everyday life.

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The eight large, round bodies in the solar system that orbit, or revolve, around the sun and are usually ordered according to their distances from the sun are called planets.

These planets are classified as either terrestrial or gas giants. The terrestrial planets, which are closer to the sun, consist of Mercury, Venus, Earth, and Mars, they are characterized by their rocky composition and solid surfaces. The gas giants, located further from the sun, include Jupiter, Saturn, Uranus, and Neptune.

These planets are predominantly composed of gases, such as hydrogen and helium, and possess a more massive size compared to terrestrial planets, they also have numerous moons and ring systems. The order of the planets from the sun is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The distances between these planets and the sun, as well as their distinct compositions and characteristics, play a vital role in shaping the diverse environments found within our solar system. So therefore planets are the eight large, round bodies in the solar system that orbit, or revolve, around the sun and are usually ordered according to their distances from the sun,

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Answer:

3.2 seconds

Explanation:

50 swings = 2 mins 40 secs

= 50 swings = 2 x 60 + 40 secs

= 50 swings = 160 secs

= 1 swing = 160 / 50 secs

= 1 swing -= 3.2 secs

The similarity between the last time the globe warmed and the climate change occurring today is that both are caused by the emission of greenhouse gases into the atmosphere.

Greenhouse gases trap heat from the sun in the atmosphere, causing the earth's temperature to increase. The difference between the two is that the current warming is happening much faster than the last time the globe warmed. This is largely due to the amount of greenhouse gases that have been released into the atmosphere since the industrial revolution. In addition, the current warming is affecting the global climate in more extreme ways than the last time the globe warmed, with more frequent and intense storms, droughts, and heatwaves.

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Answer: A BaBr2

Explanation:

On the left side of the equation, the superscript 2 is applied to both sodium AND bromine. That means you need 2 bromine on the right. Also on the left side, the 2 AFTER chlorine only applies to the chlorine so there’s only one barium. What you have on the left has to balance with what you have on the right.

The electromagnet becomes weaker when the number of coils around the nail is decreased. The correct answer is "It becomes weaker."

An electromagnet is created by coiling a wire around a magnetic core, such as a nail, and running an electric current through the wire. This creates a magnetic field around the wire, which magnetizes the core.

The strength of the magnetic field and thus the strength of the electromagnet is directly proportional to the number of coils around the magnetic core.

This is because each coil adds to the magnetic field, and the more coils there are, the stronger the magnetic field becomes.

When some coils are removed, there are fewer coils contributing to the magnetic field. As a result, the strength of the magnetic field and thus the strength of the electromagnet decreases.

Therefore, the correct option is " it becomes weaker" when the number of coils around the nail is decreased.

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Answer:

180000 m/s

Explanation:

Velocity = Wavelength x Frequency

If Wavelength = 1.2 and Frequency = 150000

Then velocity = 1.2 * 150,000 Which equals 180000

Answer:

Solution given:

frequency[f]=150000Hz

velocity[V]=x

wave length=1.2m

we have

wave length=\( \frac{V}{f} \)

1.2m=\( \frac{x}{150000} \)

1.2×150000=\( \frac{x}{1} \)

x=18000m/s

velocity=180000m/s

Answer:

The answer is A

Explanation:

Solids vibrate in a fixed arrangiment, so to find which is a solid look for the one that vibrates in a fixed arrangiment.

According to the forces of attraction, the question which would best identify model is in solid phase is which model shows the molecules vibrating in a fixed arrangement?

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Let's make a diagram to visualize the problem.

It's important to know that this motion is not like a parabola because the ball is thrown upwards. First, we find the initial velocity.

Using the given magnitudes, we have the following

The initial velocity is 33.33 m/s.

Now we are able to find the final velocity of the ball.

In an LRC series circuit at resonance, the accurate statements are:

b. The current amplitude is a maximum.

d. The reactance due to the inductor and capacitor has its maximum value.

When an LRC series circuit is at resonance, statement b is accurate, which is that the current amplitude is a maximum. At resonance, the reactance due to the inductor and capacitor cancel out, resulting in a minimum impedance. The reactance of the inductor and capacitor individually is at its maximum value, but not the reactance due to both components together. The reactance of the inductor and capacitor cannot be zero at the same time at resonance. Therefore, statements a and e are inaccurate.

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Given that the radius of the circular path is r = 142 m and the coefficient of the friction is

The condition for the car to travel safely is

Frictional force = centrifugal force

Here, m is the mass of the car and the acceleration due to gravity is g = 9.8 m/s^2.

v is the maximum speed of the car.

Answer:

Unbalanced force -  

Explanation:

Unbalanced force is expected to cause a body to accelerate.

Answer:

Unbalanced force

Explanation:

Unbalanced force is expected to cause acceleration in any body as it's net value is not zero in every direction .

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