astronomers can characterize a planet's atmosphere in absorption via group of answer choices transits only transits and the doppler method the doppler method direct imaging astrometry and the doppler method

Ultrasound waves at intensities above 104 W/m² can do serious damage to living tissues,  104 W/m² corresponds to 160 dB, 170 dB is the sound intensity level, in decibels, of ultrasound with intensity 105 W/m²,

An ultrasonic scan employs high-frequency sound waves to generate a picture of a person's interior body components. Ultrasound is frequently used by medical professionals to examine a growing foetus (unborn child), a person's abdominal and pelvic organs, muscles, tendons, heart, and blood vessels.

Given that,

Ultrasound waves at intensities above 10⁴ W/m² corresponds to 160 dB.

ultrasound with intensity 10⁵ W/m².

Sound intensity levels in dB is defined as:

β = 10 log [tex](\frac{I}{I_0})[/tex]

where [tex]I_0[/tex] is the reference intensity levels.

so, β₁ - β₂ = 10 log [tex](\frac{I_1}{I_0})[/tex] - 10 log [tex](\frac{I_2}{I_0})[/tex]

or, β₁ - β₂ = 10 log [tex](\frac{I_1}{I_2})[/tex]

or, β₁  = β₂ + 10 log [tex](\frac{I_1}{I_2})[/tex]

so, for β₂ = 160 dB, I₂ = 10⁴ W/m² , I₁ = 10⁵ W/m²

or, β₁  = β₂ + 10 log [tex](\frac{10^4}{10^5})[/tex]

or,  β₁  = 160 + 10 log [tex](\frac{10^4}{10^5})[/tex]

or, β₁  = 170 dB.

Thus, the sound intensity level is: 170 dB.

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10.66 meters per second will be the bottom speed.

We have specified that the object has a mass of 2 kg and that the plane has produced an angle of 72 meters.

The rate of acceleration will be equal to

α=ΔωΔt α = Δ ω Δ t

The rate of acceleration will be equal to t = t

Starting speed u = 0 m/sec

According to the third law of motion,

v^2=v_0^2+2ad.

So

v = 10.66 m/sec

Since the relationship is linear and passes through the origin, the acceleration of an object moving down an incline is precisely proportional to the sine of the incline's angle.

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The tension is the cable is 3100.5 N

The tension on the string can be said as the resultant of the force pulling the string.

Tension is also the force that is in between of the other two forces from the other two ends of the string.

According to the Newton's third law there is always an equal and opposite reaction.

So if the force is applied on the string then the string will also apply a force backward. This is the tension.

Weight of beam = 5180 N

Location of of thin cable attachment = 1.5 m from free end of beam

Taking moment about the wall and noting that the weight of the beam acts at the center, we get;

6.9/2 × cos 27 × 5180 = (6.9-1.5)× cos 18 × T

Therefore, T  = 15923.1776/5.136 = 3100.5 N

Therefore, the tension in the cable is 3100.5 N.

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The moment of inertia when the rational axis moved to the edge is 5/4 mr².

Given, the moment of inertia about the diameter of the uniform coin with mass m and radius r is 2/4 mr^2. Since the coin is uniform, the diameter is passing through its center of mass.

The distance from the center to the edge is r. So, by parallel axes theorem, the moment of inertia of the coin about an axis passing through its edge and parallel to the diameter is given by,

I = Icm + mr

I = mr = 4 + mp2 6/ 2 mr = -mr

So, the moment of inertia of the coin when the rotational axis moved to the edge is 5/4 mr^2.

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The person at the top of the mountain is faster than the person at the beach by 22cm/s.

When the object is oscillating about the origin, repeatedly going left and right by identical amounts it has a time period T where the period T is the time required for one complete oscillation or cycle. The angular frequency ω is related to the period of the motion by an equation in the form

                              ω[tex]=\frac{2\pi }{T}[/tex]

Where T is the period of the earth. The period of the earth to complete one cycle is 24 hours, so it is in seconds given by

                                        T = [tex]( 24 h)\frac{3600 s}{ 1 h}[/tex] = 86.4 × 10³ s

Now, we plug the value for T into equation (1) to get ω into rad/s

                    ω [tex]=\frac{2\pi }{T} \\[/tex]

                   ω = [tex]\frac{2\pi }{86.4 * 10^{3} s}[/tex]

                   ω = 7.27 × [tex]10^{-5}[/tex] rad/s

Both persons at the beach and at the top of the mountain have a velocity that is tangent to the circle of motion, and its acceleration is called centripetal acceleration. Any object on earth has angular velocity ω and a tangential speed v and they are related to each other by an equation in the form

                        v = ω r

Where r is the radius of the circle of the motion.

For the person at the beach, its radius of motion is the same as the radius of the earth r = R while for the person at the top of the mountain its radius of motion is [tex]R_{E}[/tex] + 3000

              [tex]v_{Beach}[/tex] = ω[tex]R_{E}[/tex]

                         = [tex]( 7. 27 * 10^{-5} rad/s ) (6400 * 10^{3} )[/tex]

                         = 465.280 m/s

               [tex]v_{Mountain}[/tex] = ω[tex](R_{E} + 3000)[/tex]

                               = [tex]( 7.27 * 10^{-5} rad/s) ( 6400 * 10^{3} + 3000m )[/tex]

                               = 465.498 m/s

As shown by the results, the person at the top of the mountain has a fast speed. The difference between both velocities is expressed by

               Δv =[tex]v_{Mountain}[/tex] - [tex]v_{Beach}[/tex]

                    = ( 468.498 - 465.280) m/s

                    = 0.22 m/s

                   = 22 cm/s

Hence, The person at the top of the mountain is faster than the person at the beach by 22cm/s.

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The complete question is:

A 3000-m-high mountain is located on the equator. How much faster does a climber on top of the mountain move than a surfer at a nearby beach? The earth’s radius is 6400 km.

​

​

​

Answer:

6m/s

Explanation:

since the mass are the same

M(U1+U2) = M2V

0.25(6+0)=0.25V

1.6 = 0.25V

V = 1.6/0.25

V = 6m/s

i maybe wrong or right

The ground-level no concentration 57.2 micro gram per cubic meter.

Calculation:-

C ( 2, 0.1, 0) = 80/π × 5.65 × 289.9 × 233.6 × exp ( -100²/2 × 289.9 ²) × exp ( -100²/2× 255.6²)

=

 57.2 micro gram per cubic meter.

Wind speed affects climate forecasting, aviation and maritime operations, creation projects, increase and metabolism price of many plant species, and has limitless other implications. be aware that wind course is normally nearly parallel to isobars (and not perpendicular, as one might assume), due to Earth's rotation.

The concentration in air of a pollutant to which a human being is normally exposed, i.e. between the ground and a height of some 2 meters above it.

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Answer:

running out, expensive, spread thinly

Explanation:

The parallax of stars, as viewed from the orbit of Jupiter, would be about twenty five times larger, since Jupiter's orbit around the Sun is about five times larger than that of Earth.

Parallax distances would be easier to measure from Jupiter's orbit—for the same accuracy, one could measure distances about twenty five times farther than we can from Earth.

Parallax distance is the measuring of how nearby object appears to move against the background of more distant objects.

The principle of parallax., is used by astronomers to measure large distances, such as the distance of a planet or a star from Earth.

The term parallax is the semi-angle of inclination between two sight-lines to the star, as observed when Earth is on opposite sides of the Sun in its orbit.

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got the ans

A helium-filled balloon (whose envelope has a mass of mb=0.250kg) is tied to a uniform string of length ℓ=2.00m and mass m = 0.0500 kg. The balloon is spherical with a radius of r = 0.400 m. When released in air of temperature 20∘C and density rhoair=1.20kg/m3, it lifts a length h of string and then remains stationary. We wish to find the length of string lifted by the balloon. (a) When the balloon remains stationary, what is the appropriate analysis model to describe it? (b) Write a force equation for the balloon from this model in terms of the buoyant force B, the weight Fb of the balloon, the weight FHe of the helium, and the weight Fs of the segment of string of length h. (c) Make an appropriate substitution for each of these forces and solve symbolically for the mass ms of the segment of string of length h in terms of mb, r, rhoair , and the density of helium rhoHe, (d) Find the numerical value of the mass ms. (e) Find the length h numerically.

Only one civilization is in existence now. The human civilization that is present on the earth is the civilization that exists in this period of time. It can also exist in the coming future for several centuries.

Earth is the only planet where intelligent civilization can exist. Atmospheric conditions are also not so suitable for life to exist on planets other than earth. The other habitable planets in the galaxies have conditions that can help to persist life. The availability of water and oxygen on the planets gives a trace of a complete package of materials that makes life possible on other planets.

Some of the technological advancements such as building a spacecraft and placing a satellite in space are the areas of searching of life on other planets.

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When two bumper cars collide, the force exerted on each car causes a change in the momentum for each car. the total momentum for both cars is the same before and after the collision.

Momentum can be defined as the impulse gained by a moving object.

Since it is a product of mass and velocity the product would not change even if the mass and velocity of the object changes after the collision.

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Hence, work done over the particle is 26

According to the given information

Consider a particle that moves on the line segment from (1,0,0) to (3,4,2)

The objective is to find the work done by the force field [tex]$F(x, y, z)=\langle y+z, x+z, x+y\rangle$[/tex] on the particle.

The particle moves on the line segment joining the points (1,0,0) to (3,4,2).

Recall that the work done over the particle is given by the integral as follows:

[tex]W=\oint_C F \cdot d r[/tex]

The curve C represents the line segment from the point (1,0,0) to (3,4,2).

Calculate the vector function which represents the segment such as,

[tex]& r(t)=\langle 1,0,0\rangle+t\langle 3-1,4-0,2-0\rangle \\[/tex]

[tex]& r(t)=\langle 1,0,0\rangle+t\langle 2,4,2\rangle \\[/tex]

[tex]& r(t)=\langle 1+2 t, 4 t, 2 t\rangle[/tex]

The vector [tex]$\vec{r}(t)=(1+2 t) \vec{i}+(4 t) \vec{j}+(2 t) \vec{k}$[/tex]

Compare the above equation with [tex]$\vec{r}(t)=x \vec{i}+y \vec{j}+z \vec{k}$[/tex]

Evaluate the value of x, y, z by above equations.

x=1+2 t, y=4 t, z=2 t

Since, [tex]$F(x, y, z)=\langle y+z, x+z, x+y\rangle$[/tex]

Substitute the values of equation (2) to get,

[tex]x & =y+z \\[/tex]

  [tex]& =4 t+2 t \\[/tex]

  [tex]& =6 t \\[/tex]

[tex]y & =x+z \\[/tex]

  [tex]& =1+2 t+2 t \\[/tex]

  [tex]& =1+4 t \\[/tex]

[tex]z & =x+y \\[/tex]

  [tex]& =1+2 t+4 t \\[/tex]

  [tex]& =1+6 t[/tex]

Find the derivate of the vector as,

[tex]d r(t)=(2 \vec{i}+4 \vec{j}+2 \vec{k}) d t[/tex]

Here [tex]$0 \leq t \leq 1$[/tex]

Substitute the values in equation (1) as follows:

[tex]& \oint F \cdot d r=\int F(r(t)) \cdot r^{\prime}(t) d t \\[/tex]

            [tex]& =\int_0^1 F(r(t)) \cdot r^{\prime}(t) d t \\[/tex]

            [tex]& =\int_0^1((6 t) \vec{i}+(1+4 t) \vec{j}+(1+6 t) \vec{k}) \cdot(2 \vec{i}+4 \vec{j}+2 \vec{k}) d t \\[/tex]

            [tex]& =\int_0^1(12 t+4+16 t+2+12 t) d t[/tex]

            [tex]& =\int_0^1(40 t+6) d t \\[/tex]

            [tex]& =\left(\frac{40 t^2}{2}+6 t\right)_0^1 \\[/tex]

            [tex]& =\left(20 t^2+6 t\right)_0^1 \\[/tex]

            [tex]& =26[/tex]

Hence, work done over the particle is 26

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False. The speed of an electromagnetic wave doesn't change as its frequency rises.

The unseen energy that moves throughout the cosmos is known as electromagnetic waves. But some of this energy's effects are visible. The electromagnetic spectrum includes the light that can be seen by our eyes.

When an electric field and a magnetic field vibrate together, electromagnetic waves, or EM waves, are produced. Thus, magnetic and electric fields oscillate to form electromagnetic waves (EM waves).

Due to the fluctuating electric and magnetic fields that they include, energy waves are known as electromagnetic (EM) waves. By comparing their wavelength or frequency, from high to low frequency, scientists may categorize them (short to long wavelength).

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The output force was found to be 16N

define force ?

1. The ability to do tasks or bring about physical change; vigour, vigour, or active power: the force of an explosion.

2. a. The application of force to overcome resistance; exertion: hammering a nail with force.

b. The use of force to compel or restrain: a confession that was gained violently.

3. a. The strength or vigour of the intellect, particularly as expressed in writing or speech.

b. Moral fortitude.

c. The ability to influence thought or behaviour; efficacy: the power of reasoned argument.

d. The forces of evil are one that has this ability.

A huge labour force is an organised group of people or other resources that are available for a certain purpose.

The lever's mechanical advantage is defined as the ratio of output force to input force. Another term for the mechanical advantage of the lever is the ratio of input arm distance to output arm distance.

F1=8N

d1=6m

d2=3m

the output force Fo= ?

⇒ Fo/8=6/3

Fo=16N

Therefore the output force was found to be 16N

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0.9 solar mass The radius is smallest for a white dwarf. A common unit of mass used in astronomy is the solar mass, which is roughly 2 10 kg. It is frequently employed to denote the masses of other stars.

Including black holes, galaxies, nebulae, star clusters, and more. In other words, the atomic radius is smaller because the electrons are being drawn closer to the nucleus by a stronger force of attraction. Additionally, anions are larger than their corresponding atoms due to electron-electron repulsion, which causes them to spread apart. It follows that Cl has the shortest radius. Almost every aspect of a star, including its brilliance, size, evolution, longevity, and ultimate fate, is governed by its starting mass.

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The height of the image that will be magnified on the retina will be 0.0022833m or .22833cm and it will be inverted.

What is magnification?

When anything is magnified, its seeming size is increased rather than its real size. This enlargement is quantified using a mathematical quantity called "magnification." When this number is less than one, a drop in size is frequently referred to as "magnification" or "de-magnification."

Briefing:

Given,

The distance of, u = 6 meters

The lens distance from the retina, v = 1.7 cm

The height of the object, hu = 1 m

We have to find the size of letters that appears in the retina, hv;

Here,

Magnification, M = -v/u =  [tex]\frac{h_{v} }{h_{u} }[/tex]

- 0.017/6 = hv/1

hv = -0.017/6

hv = -0.002833m

The image height will be 0.002833 m and it will be inverted.

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The rms velocity will become √3 times the actual or original value, if pressure is tripled.

The rms velocity of gas molecules is directly proportional to the square root of temperature. But it is Inversely proportional to the square root of molar mass. The equation can be expressed as: Vrms ∝ √T

If the pressure is tripled, the will be tripled. And volume is kept constant. temperature. Then rms velocity becomes √3 times the actual or original value. Since rms velocity is directly proportional to √T.

Therefore, the rms velocity will become √3 times the actual or original value.

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Answer:

Igneous

CORE AGE

intrusion

We notice that some distant galaxies are travelling in our direction, but the motion of the galaxies in our local group is different. A true image of the actual galaxies was used to create the composite image.

Of the Local Group. Are members of the Local Group. If not in exact scale, the galaxies have been positioned in the roughly proper orientation. Edwin Hubble was the first to recognise the Local Group at the time of the earliest observations of redshift and distance. Stars, stellar remnants, interstellar gas, dust, and dark matter are all gravitationally bonded together in a motion. The term is literally "milky," alluding to the Milky Way.

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The speed of proton will be √2vo.

For more than 2,000 years, scientists thought that the atom was the smallest possible particle. Then they discovered that it has a nucleus composed of protons and neutrons surrounded by electrons.

They then discovered that protons and neutrons themselves have a complex inner world full of quarks and antiquarks held together by a superglue-like force created by gluons.

Later experiments with protons accelerated to speeds close to the speed of light showed that the proton is even more complex than originally thought.

For example, it contains countless particles that interact with each other—not just three quarks bound to gluons. And gluons can briefly turn into quark-antiquark pairs before annihilating each other and becoming gluons again.

Most of these results have come from particle accelerators like the one at DOE's Fermi National Accelerator Laboratory.

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A fossil fuel is a type of energy source that is formed from the remains of plants and animals that lived millions of years ago. The three most common types of fossil fuels are coal, oil, and natural gas. These fuels are formed through a process called fossilization, which occurs when the remains of plants and animals are buried under layers of sediment and subjected to high pressure and heat over millions of years.

Fossil fuels work by releasing energy when they are burned. When fossil fuels are burned, they release chemical energy that can be used to generate electricity, heat homes and buildings, and power vehicles. Fossil fuels are used extensively around the world for energy production, but they have several drawbacks. For one, they are non-renewable, meaning that once they are used up, they cannot be replenished. Additionally, the burning of fossil fuels releases large amounts of greenhouse gases, which contribute to climate change.

Despite these drawbacks, fossil fuels are still widely used as an energy source around the world. However, many countries are working to reduce their reliance on fossil fuels and transition to cleaner, renewable energy sources in an effort to address the negative impacts of fossil fuel use.

A node is a position of a) minimum amplitude.

In the field of physics, the position where there is the lowest amplitude present in a particular wave is referred to as a node.

In a wave, the nodes can be produced as the regions of destructive interference where the amplitude is minimum.

For example, consider a guitar that has its strings vibrating. In such a case, the place where there will be minimum amplitude will be the ends of each string. Hence, we will refer to the ends of each string as the nodes of the guitar.

On the other hand, anti-nodes are the positions on a wave where the amplitude is the highest.

Although a part of your question is missing, you might be referring to this question:

A node is a position of

a) minimum amplitude

b) maximum amplitude

c) maximum resonance

d) minimum resonance

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The magnitude of the earth's velocity as it travels around the sun is   Vo  = 29.87 Km/s

In basic words, angular velocity is the time rate at which an item rotates or revolves about an axis. Angular velocity is represented by the Greek letter omega (ω, sometimes Ω). The SI unit for angular velocity is radians per second because it is expressed as an angle per unit of time.

According to the given information

Orbital velocity Vo =  2[tex]\pi[/tex]r/T

                          Vo  =  2 × 3.14 × 1.5 × 10^11/365 ×24× 60×60

                          Vo  = 29.87 Km/s

Angular velocity and linear velocity are related as  V  =  r W

So

W = 29.87×10^3/1.5×10^11

W  = 1.991×10^-7 rad/s

The magnitude of the earth's velocity as it travels around the sun is   Vo  = 29.87 Km/s

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Generally, the coefficient of static friction should be at least 0.7 for a car traveling at this speed, but this value could be higher depending on the specific conditions.

The coefficient of static friction, or μs, is the ratio of the maximum static force that can be applied without causing slipping to the normal force between two surfaces. The coefficient is affected by the surfaces in contact and the material they are made of.

The tires of a car also have an effect on the coefficient of static friction. Tires with a greater tread depth can provide better grip on the road and therefore have a higher coefficient of static friction than tires with a shallow tread. Tire pressure also plays a role, as low pressure can reduce the coefficient of static friction.

The weight of the vehicle is also an important factor. Heavier vehicles tend to have a higher coefficient of static friction, as the greater mass increases the normal force between the car and the surface.

In conclusion, the coefficient of static friction for a car traveling at 115 km/h around a turn depends on several factors, including the road surface, the vehicle's tires, and the vehicle's weight.

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The force on any of the back of the given dam is 2.352 x [tex]10^{11}[/tex] N.

Force is an outside agent able to converting a body’s nation of relaxation or movement. It has a importance and a path. The path toward which the pressure is carried out is called the path of the pressure, and the utility of pressure is the factor wherein pressure is carried out.

Force is an vital idea because it impacts movement. It may be described as an interplay that modifications the movement of an item if unopposed. But the easy definition of pressure is that it's far the rush or pull skilled via way of means of any item. Force is a vector quantity, hence it has each importance and path. Therefore, one has to specify each the path and the importance to explain the pressure appearing on an item.

The Force may be measured the usage of a spring balance. The SI unit of pressure is Newton(N).

The area is 1200 m x 200 m = 240,000 m²

The average pressure is Pave = ρ x g x have

where  ρ is the density, g is the gravity, and have is the average height.

Pave = (1000 kg/m³)(9.8 m/s²)(100 m) = 980,000 Pa

Solving the hydrostatic force using the formula F = P x A,

F = (980,000 Pa)(240,000 m²) = 2.352 x [tex]10^{11}[/tex] N.

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False, Since v = lambda f, a wave's velocity v is independent of its wavelength lambda. mainly because the medium's characteristics affect the wave's speed.

For instance, the elastic and inertial properties of the medium affect the wave's speed for a mechanical wave. Wavelength Simply said, the wavelength is the separation between the wave crests. Additionally, a wide variety of objects move in waves of varying sizes, including light, air, water, strings, and air (which are all types of waves). In addition, we use the Greek symbol lambda to denote the wavelength of the wave (). But most people are unaware that there is a formula used to calculate wavelength.

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The work function of the metal is 4.1 ev

maximum wavelength, λ = 485 nm = 485 x 10^-9 m

The work function of the metal,

Wo = hc/[tex]\lamda[/tex]λ

where, h is the Plank's constant and c be the speed of light

h = 6.634 x 10^-34 Js

c = 3 x 10^8 m/s

Wo = hc/[tex]\lamda[/tex]λ

Wo = (6.634 x 10^-34*3 x 10^8)/485 x 10^-9

= 4.1 ev

Work function:

The least amount of energy needed for photons to simply expel from the metal's surface is considered to be the work function of the metal. The smallest amount of energy required to extract an electron from a metal is represented by the work function. The work function and ionization energy of metals are same. The surface's condition has a significant impact on how well a surface performs its purpose.

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The cart's increased speed is the same as when it first took off.

Rate is the speed from which an object travels along a path over time, whereas velocity is the speed and orientation of an item's motion.

We're informed that;

At first, the cart is at rest. So, u = 0 m/s.

A brief period of time is spent with a constant force applied.

The final speed that the force gives the cart is what we'll call v.

Newton's first equation of motion yields the following results:

v = u + at

Where;

The ultimate speed is v.

The starting speed is u.

Acceleration is a.

t is time.

u = 0 m/s, therefore we now have;

v = 0 + at

v = at

Let's now use Newton's second rule of motion to construct a formula to introduce force;

F = ma

Where;

Force is f.

mass is m.

Acceleration is a.

So, a = F/m.

F/m for an in and v = at to obtain;

v = (F/m)t

The final speed, v, is evidently exactly related to the force. So, if the force is constant, the end speed will also stay constant.

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The complete question is -

A constant force is exerted for a short time interval on a cart that is initially at rest on an air track. This force gives the cart a certain final speed. Suppose we repeat the experiment but, instead of starting from rest, the cart is already moving with constant speed in the direction of the force at the moment we begin to apply the force.

After we exert the same constant force for the same short time interval, the increase in the cart's speed:

A. is equal to two times its initial speed.

B. is equal to the square of its initial speed.

C. is equal to four times its initial speed.

D. is the same as when it started from rest.

E. cannot be determined from the information provided.

The focal length of the converging lens is 43 cm.

Solution:

LEM 2.

For lem 2,

4₂ = - (11+32) - 43 cm

v₂ = ∞

1/v₂ - 1/4₂ = 1/f₂

0 - 1/-43 = f₂

f₂ = +43cm

The distance from the lens to the focal point is called the focal length. A converging lens always has a positive focal length and a negative lens always has a negative focal length. However, these conventions are arbitrary, and physicists would be better off reversing the sign.

The focal length must be positive because according to the sign convention of the lens, the focal length is measured in the direction of the incident ray since rays converge toward the right side of the lens. A converging lens directs light to a point at the optical center or axis of the lens.

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