0.2×51000)
Explanation:
change 5ms into cms before multiplying by 0/2 kgs
an air-filled parallel-plate capacitor has a capacitance of 1.5 pf. the separation of the plates is doubled and wax is inserted between them. the new capacitance is 3.0 pf. find the dielectric constant of the wax.
The dielectric constant of the wax is 2.
The dielectric constant of wax is the ratio of the capacitance of a capacitor that has wax between its plates to its capacitance when there is no wax between its plates.
This can be calculated by first finding the total capacitance of the capacitor with wax in between it:
C = 2 * pf * (0.5cm)^2
= 1.5 pf
Then, we can calculate the change in capacitance:
C' = C - C
= 2 pf * (0.5cm)^2 - 1.5 pf
= 0.5 pf
Finally, we divide 1/0.5 to find C'/C = 2, so we conclude that the dielectric constant for wax is 2, or twice as large as air's dielectric constant of 1!
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two cars, car x and car y, begin accelerating from rest, at the same time. car x is more massive than car y. the net force exerted on each car is identical. after 10 seconds, which car has more momentum?
They all have same amount of momentum.
What is momentum?The quantity of a body's motion is referred to as momentum.Given that momentum depends on both velocity and the direction of the body's motion, it is quantified as "mass velocity". Since velocity and mass are both scalar quantities, momentum is a vector quantity. Momentum = Mass X Velocity.example ,since a truck carrying products has a great mass and is traveling at a high speed, it must slow down before a stop sign because it will be difficult to stop.Despite carrying relatively little mass, a traveling bullet has a lot of momentum because of its high velocity.To learn more about momentum refer to:
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two cars collide inelastically and stick together after the collision. before the collision, the magnitudes of their momenta are p1 and p2 . after the collision, what is the magnitude of their combined momentum?
the magnitude of their combined momentum is p=p1+p2
In Newtonian mechanics, an object's mass and velocity are combined to create momentum, more precisely linear momentum or translational momentum. It is a vector quantity with a magnitude and a direction. When an object's mass (m) and velocity (v), which is also a vector quantity, are known, the result is the object's momentum.
The kilogram meter per second (kg m/s), which is equated to the newton-second in the International System of Units (SI), is the unit used to measure momentum.
According to Newton second law of motion, a body's rate of momentum change is equal to the net force acting on it. While momentum varies depending on the frame of reference, it is a conserved quantity in every inertial frame.
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what is the initial current? (b) what is the rc time constant? (c) what is the current after one time constant? (d) what is the voltage on the capacitor after one time constant?
(a) Initially, the capacitor acts just like a wire:
I = V/R
=6.16/480
= 0.01283 A
= 12.83 mA
(b) Time constant = R*C
= (480) * (1.5*10^-6)
= 7.2*10^-4 s
(c) The voltage across R = Total voltage - voltage across c
= 6.16 - 3.89
= 2.27 V
(d) Voltage across R/R
= 2.27 / 480
= 4.73*10^-3 A
= 4.73 mA
Answer: 4.73 mA
A resistor-capacitor circuit is an electrical circuit consisting of passive components such as resistors and capacitors driven by a current or voltage source. Capacitors store energy and resistors in the circuit control the rate of charging or discharging. The frequency variation of RC/IC circuits is defined as the frequency of the signal flowing through the circuit. Also called natural frequency. An RC circuit is a circuit in which a resistor and a capacitor are connected in series.
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an ac adaptor for a telephone answering unit uses a transformer to reduce the line voltage of 80 v (rms) to a voltage 9.8 v. the rms current delivered to an answering system is 392 ma. if the primary (input) coil in the transformer in the adaptor has 170 turns, how many turns are there on the secondary (output) coil? answer in units of turns.
The secondary coil of the transformer is 21 turns.
We need to know about transformers to solve this problem. The transformer is a device that changes the output voltage by using different turns on its coil. The ratio of output voltage and input voltage should follow this equation
Vo / Vi = Ns / Np
where Vo is output voltage, Vi is input voltage, Ns is secondary turns and Np is primary turns.
From the question above, the given parameters are
Vi = 80 V
Vo = 9.8 V
Np = 170 turns
By using the equation, we can calculate the secondary turns
Vo / Vi = Ns / Np
80 / 9.8 = 170 / Ns
Ns = 170 . 9.8 / 80
Ns = 20.825
Thus we can round the secondary turns to 21.
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the distance between two successive minima of a transverse wave is 2.76 m. five crests of the wave pass a given point along the direction of travel every 14.0 s. find (a) the frequency of the wave and (b) the wave speed.
The wave's frequency is 0.35 Hz, and its velocity is 0.9857 m/s. Wave speed is the amount of space a wave covers in a certain length of time, such as how many meters it covers in a second.
How fast or how fast is a wave?Despite the fact that technically, velocity implies both direction and speed wave velocity is most often used to describe speed. Wave intensity has no bearing on a wave's velocity, which is determined by the product of the its wavelength and frequency.
Wave speed and frequency: what are they?A stationary point is traversed by waves at a specific frequency over a specified period of time. The following equation demonstrates the connections between the three variables: Wavelength × Wave Frequency = Speed. This equation uses the units of meters for wavelength and hertz (Hz) for frequency, or the number many waves per second.
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What is the relationship between generator and energy input
The relationship between the generator and the energy input is the fact that the generator uses mechanic energy as input to produce electricity.
What is an electrical generator device?An electrical generator device is any instrument capable of generating electrical activity using any source of energy as a source for such purpose, such as the movement (motion of mechanical energy) of a turbine.
Therefore, with this data, we can see that an electricity generator device is a given instrument used to generate electricity by exploiting the mechanical energy generated through a particular process.
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a playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and it is rotating with an angular velocity of 0.600 rev/s. what is its angular velocity (in rev/s) after a 21.0 kg child gets onto it by grabbing its outer edge? the child is initially at rest.
The value of the final angular velocity = 0.44 rev/s
How to calculate the angular velocity?Let Initial angular momentum = [tex]L_{i}[/tex]
Let Final angular momentum = [tex]L_{f}[/tex]
Here, mass of merry go round = [tex]m_{m}[/tex] = 120 kg
radius= r = 1.8 m
initial angular velocity = [tex]w_{i} = 1.2 \pi[/tex]rad/s
mass of the child = [tex]m_{c}[/tex] = 21kg
By law of conservation of angular momentum,
[tex]L_{i}=L_{f}\\\\I_{m}w_{i}=I_{m+c} w_{f}\\\\w _{f} =\frac{I_{m}w_{i}}{I_{m+c}}[/tex]
Here, substitute [tex]I = \frac{mr^{2} }{2}[/tex]
[tex]w _{f} =\frac{I_{m}w_{i}}{I_{m+c}}\\\\w _{f} =\frac{\frac{m_{m}{r _{m}}^{2}}{2} w_{i}}{\frac{m_{m}{r _{m}}^{2}}{2}+{m_{c}r_{c}}^{2} }\\\\w _{f}= \frac{\frac{120(1.8)^{2} }{2} *1.2\pi}{\frac{120(1.8)^{2} }{2} +21(1.8)^{2}}\\\\w _{f} = 2.8 rad/s[/tex]
The value of the final angular velocity = 2.8 rad/s
=2.8/2 π
= 0.44rev/s
What is angular velocity?The rotation rate, which refers to how quickly an object rotates or revolves in relation to another point, is measured vectorially using angular velocity. The speed at which an object rotates or revolves around an axis is known as its angular velocity. Because a point on a rotating object constantly changes direction, it is challenging to determine the direction of the angular velocity. The rotating object only has a fixed direction at its axis.To learn more about angular velocity, refer:
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two forces whose resultant is 10N are perpendicular to each other. if one of them makes an angle of 60 with the resultant, calculate its magnitude
The magnitude of the resultant with respect to one of the vectors is [tex]10 \sqrt{3} \mathrm{~N}[/tex].
The resultant of two force is given by [tex]$F=\sqrt{A^2+B^2+2 A B \cos \theta}$[/tex] where, [tex]$A \& B$[/tex] are two vectors & [tex]$\theta$[/tex] is the angle between them.
Magnitude or resultant is [tex]$\sqrt{2 \times 10^2+2 \times 100 \cos 60^{\circ}}=10 \sqrt{3} \mathrm{~N}$[/tex].
A force is an influence in physics that can modify the velocity of an object. A force can cause a mass item to change its velocity, or accelerate. Intuitively, force can be described as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The term "force" has a specific meaning in science. At this level, it is quite acceptable to refer to a force as a push or a pull. A force is not something that an object 'has in it.' Another object applies a force to another. The concept of a force is not limited to living or nonliving things.
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what type of cloud that has a thin wispy appearance, consists of ice crystals, and often precedes a warm front?
Cirrus clouds .Since they are made completely of ice crystals descending through the atmosphere, they are wispy.
What weather do cirrus clouds bring?Cirrus clouds are thrown across the sky in strong winds and are thin, wispy clouds.Fair weather may be indicated by a few cirrus clouds, but expanding cover indicates a shift in the weather (an approaching warm front) will take place within the next 24 hours.Being entirely made of ice crystals that have fallen through the atmosphere, they are wispy; if blown horizontally by winds, they take on a distinctive hooked appearance.Prior to a warm front, where the air masses collide at high altitudes, cirrus clouds appear, frequently signaling an impending weather changeCirrus clouds won't affect you if you're flying under visual flight rules because they'll be high above you. Cirrus clouds, which resemble long, thin, wispy white streamers high in the sky, are comprised of ice crystals.Due to their resemblance to a horse's tail, they are frequently referred to as "mare's tails."To learn more about cirrus clouds refer
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What is the fastest speed a tennis ball can cross the net horizontally and still land in the court? from the net to the end line is 12 m, and the height of the net is 1 m. neglect air resistance and spin of the ball.
The maximum velocity of the tennis ball when it cross the net in order to still land in the court is 26.7 m/s
The trajectory of the tennis ball follow a projectile motion. When it cross the net, it can be considered it is at its maximum height.
At this position, the component of the velocity is only in x direction.
Vertical direction:
h = 1/2 . g t²
Where:
h = maximum height
g = acceleration due to gravity = 9.8 m/s²
t = time to land
Substitute h = 1 m
t² = 2/g = 0.204
t = 0.45 seconds
Horizontal direction:
x = v . t
12 = v . 0.45
v = 12 / 0.45 = 26.7 m/s
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What did galileo galilei and isaac newton believe about theories of the natural world?.
Galileo Galilei and Isaac Newton disputed the Aristotelian view that the sun should be at the center of the cosmos and believed that the earth was the center of the universe which is about theories of the natural world.
Unlike the Aristotelians, who believed in observation to look for natural circumstances, their view of nature was founded on experimental results. The basic means of communication with the world in the Aristotelian scientific tradition was observation and the pursuit of "natural" conditions. Galileo investigated earthly motion laws and established the principles of gravity.
First, Newton firmly established the laws of motion and connected them to Kepler's equations of planetary motion. Until Newton, there was no clear link between celestial body motion and earthly physics.
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You are fighting with your sibling over a 2 kg toy. you apply a force of tension on the toy equal to 8n. your sibling causes the toy to experience an acceleration of 4m/s2 in the opposite direction. what is the net force that the toy feels?
The net force on the toy is 0 Newton.
The mass of the toy is 2 kg.
The force F₁ is the tension applied by one of the siblings on the toy is 8N.
Let us assume that the force applied by the other sibling is F₂, which is produced by the acceleration is 4m/s².
We know,
Force = Mass x acceleration
Putting values,
F₂ = 2 x 4
F₂ = 8N.
As we know that the forces are in opposite directions because the toy is being pulled by both the siblings in their respective directions which are opposite to each other.
Hence, the net force F is given by,
F = F₁ - F₂
F = 8-8
F 0N.
Hence, there is no net force on the toy.
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if you toss a ball to your friends when the ball reaches its maximum altitude it’s vertical acceleration is what? is it 0 m/s or -9.81?
The vertical acceleration of the ball at its highest altitude is 0 m/s.
Has the acceleration ever been zero?It is possible for an item to have both zero acceleration and non-zero velocity because acceleration is the change in velocity. Since there is no change in velocity while an object is moving at a constant speed, it experiences no acceleration.
At maximum height, is vertical velocity zero?The bullet reaches its highest point when its vertical velocity is zero. The vertical portion of the velocity vector will now point downward. The projectile's horizontal range, which is determined by the object's beginning velocity, is referred to as the projectile's range.
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later the car is traveling along a long straight road when it passes over a hill. the hill has a radius of 230 m. what is the minimum speed the car must have in order to become airborne as it crests the hill?
The minimum speed at which a car can leave the road at the top is 47.47 m/s
What is the minimum speed?Following are the calculations for the minimal speed at which a vehicle can veer off the road;
The hill has a radius of 230 m
Fc = Fn
[tex]\frac{mv^{2} }{r} = mg \\\frac{v^{2} }{r} =g\\v^{2} =rg \\v=\sqrt{rg}[/tex]
where;
The curving road's radius is 230 meters, and
the acceleration caused by gravity is 9.8 meters per second.
[tex]v = \sqrt{230* 9.8}[/tex]
r = 47.47
As a result, 47.47 m/s is the lowest speed at which a vehicle can exit the road at the top.
Find the approximate centripetal acceleration caused by gravity, g, in meters per second squared, and the radius of the vertical circular motion, r, in meters. Step 2: Using the formula vmin=rg v min = r g, get the object's minimum speed (the speed at the top of the circle).
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The ball is about to hit the ground.
It has a kinetic energy store of 110 J.
Ignoring the effects of friction, what is the maximum elastic potential energy store of the ball when it is fully compressed after hitting the ground?
The maximum elastic potential energy store of the ball when it is fully compressed after hitting the ground is 110 J
Since the effects of friction is ignored, there is no loss of energy as heat. So the entire elastic potential energy store of the ball is converted into kinetic energy store.
Elastic potential energy = Kinetic energy
Kinetic energy = 110 J
Elastic potential energy = 1 / 2 k x²
Kinetic energy = 1 / 2 m v²
k = Spring constant
x = Displacement
m = Mass
v = Velocity
If friction is ignored,
1 / 2 k x² = 1 / 2 m v²
v / x = √ ( k / m )
Therefore, the maximum elastic potential energy store of the ball is 110 J
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which imaging modality places time of flight information on the x-axis and echo amplitude on the y-axis?
Amplitude modulation, or AM, is a modulation method used in electronic communication, most frequently for radio wave transmission of messages.
What is amplitude mode?A common collective excitation associated with the spontaneous breaking of a continuous symmetry is the amplitude (Higgs) mode. We use a combination of stochastic analytic continuation and quantum Monte Carlo (QMC) simulations to look at the dynamics of the amplitude mode in a three-dimensional dimerized quantum spin system.In physics, amplitude refers to the most displacement or distance that a point on a vibrating body or wave can travel in relation to its equilibrium location.The method of amplitude modulation involves changing the amplitude of the wave signal before it is broadcast. It is frequently used to send information using a radio carrier wave and is known by the abbreviation AM. Electronic communication is where amplitude modulation is most commonly utilized.To Learn more About Amplitude modulation refer to :
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PLS help confused. Will mark brainiest for the right answer.
Answer:
B
Explanation: You (with the ball in your hand)would move in the direction of the ball's initial motion. Momentum!
Answer: You would move backward.
Explanation: You would push back because you would move in the direction of the ball's initial motion. The ball's initial motion is to come toward you, so you would most likely move backward.
Let me know if this is right! :)
To open a box, you apply 50 N of force to a crowbar. the crowbar applies 450 N of force to the lid of the chest. What is the mechanical advantage of the crowbar?
Answer: The mechanical advantage of the crowbar 9
Answer:
9
Explanation:
50N-load
450N-effort
m.a=load÷effort
450÷50=9
What is the direction of acceleration at all points in the projectile's path?
What is the velocity of an orange that falls from the rest for 2.17 seconds
The final velocity of the orange will be equal to 21.27 m/s.
What is the equation of motion?The equations of motion have established the relationship between the acceleration, velocity, time, and displacement (s) of a moving object.
The equations of motions can be mathematically expressed as:
[tex]v = u +at\\S=ut +\frac{1}{2}at^2\\ v^2-u^2=2aS[/tex]
Given, the velocity of the orange was at rest initially, therefore, u = 0
The time taken by the orange to fall, t = 2.17 s
The acceleration of orange due to gravity, g = 9.8 m/s²
From the first equation of motion, we can find the final velocity after 2.17 s:
v = u +gt
v = 0 + (9.8) × 2.17
v = 21.27 m/s
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what is the difference of chinese and korean music
The music performed on the Chinese instrument was typically fast-paced, technically impeccable, and pitched high. The Korean instrument, however, is normally performed in a low range and with less emphasis.
What's the name of that instrument from China?Chinese musical instrument known as the pipa has four strings and is classified as a plucked instrument. The instrument, which is sometimes referred to as the "Chinese lute," features a peculiar pear-shaped wooden body and 12 to 26 frets.
What is the most popular instrument in China?According to Shanghai Chinese Orchestra director Luo Xiaoci, the guzheng is now regarded as the most well-liked traditional Chinese musical instrument and is comparable to the piano for Western music. A flexible instrument with a wide variety of tones is the guzheng.
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the distance between x-ray tube and the bucky (the area that stores the film), is referred to as the .
An x-ray cassette is kept in a device called a "bucky" that resembles a drawer. It can be installed either on the wall or underneath the exam table.
These days, buckys have an internal grid that absorbs dispersed radiation to enhance the clarity of x-ray images. The oscillating option that modern buckys have added further aids in preventing scattered radiation from reaching the x-ray cassette and increases the quality of the x-ray image.To ensure that a high-quality x-ray image is created when using Bucky, an increase in radiation exposure parameters (kVp and mAs) is necessary. If Bucky is not utilized, the same x-ray technique can be carried out with lower exposure factors, but the image quality will suffer.To know more about x-ray
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If the force on a cart is doubled, what happens to the acceleration of the cart?.
Answer:
It will be doubled
Explanation:
F = ma
Let's consider m = 1 (the mass of the cart is not changing so it is constant),
F = 2, and a = 4.
2 = 1 x 4
When doubling force we need to maintain equality so acceleration should double too. To understand it better find the ratio of force and acceleration 2/4 = 1/2. The ratio of force to acceleration should always equal half in all scenarios, this way we can see how equality is maintained.
2x2 = 1 x (4x2)
4 = 1 x 8, and the ratio of force to acceleration is 4/8 = 1/2.
Two nucleotides on the same strand form a __________ bond while two complimentary bases on opposite strands form ____________ bonds. An a-t base pairing forms _____ such bonds.
Two nucleotides on the same strand form a Phosphodiester bond while two complimentary bases on opposite strands form Hydrogen bonds. An a-t base pairing forms 2 such bonds.
In DNA double helix, the individual constituents are called nucleotides. These nucleotides are composed of bases which are linked together though covalent linkage also known as a phosphodiester bond.
Two individual strands in DNA are formed by the combination of phosphodiester linkages.
In general, with in a DNA nucleotides, hydrogen bonds are present which join the complementary pairs of bases. For example, two hydrogen bonds are present between thymine and adenine while three hydrogen bonds are present between cytosine and guanine.
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prior to the discovery of atmospheric pressure, the failure of wine to pour from the bottom of a barrel unless an opening was made in the top was explained by:
Horror vacui or Nature abhors a vacuum is the principle that explain the inability of wine to pour from the bottom of a barrel without a top opening.
What is Horror vacui ?In physics, horror vacui, or plenism, is a postulate attributed to Aristotle. He articulated a notion, later questioned by the atomism of Epicurus and Lucretius, that nature contains no vacuums since the denser surrounding material continuum would fill the rarity of an incipient void right away.
He also argued against the void in a more abstract sense, saying, for instance, that since a void is nothing by definition, it cannot be said to exist. This is in line with Plato. Furthermore, because it wouldn't have any features, it couldn't be perceived by the senses and its supposition wouldn't be able to add to the explanation.
Thomas Hobbes, Robert Boyle, and others debated the theory in the context of fluid mechanics in the 17th century. Sir Isaac Newton and Gottfried Leibniz continued the discussion in the early 18th century.
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if the sun were replaced by a one-solar-mass black hole, group of answer choices our clocks would all stop. we would immediately escape into deep space, driven out by its radiation. we would still orbit it in a period of one year. all terrestrial planets would fall in immediately. life here would be unchanged.
we would still orbit it in a period of one year if the Sun were to be replaced with an equally huge black hole.
What if Sun is replaced by black hole?All of the planets would continue to orbit the black hole in their current positions at a safe distance if the Sun were to be replaced with an equally huge black hole.Without the Sun's heat and light, life would be impossible, yet Earth would still exist.The Sun would still be in the center of Earth's orbit.It goes without saying that the Earth's temperature would alter and that we wouldn't be affected by solar winds or solar magnetic storms.we would still orbit it in a period of one year if the Sun were to be replaced with an equally huge black hole.To learn more about Black hole refer,
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when an object moves at a constant speed against friction on a horizontal tabletop, there is an increase in the object's a) potential energy b) temperature c) acceleration d) momentum
any procedure where velocity fluctuates
What is acceleration, briefly?
Any procedure where the velocity varies is referred to as acceleration. There are only two methods to accelerate because velocity is both a speed and a direction: changing your speed or changing your direction.
An object has positive acceleration if it is accelerating and travelling in the right direction. Positive acceleration was demonstrated in the first example by the speeding car. The acceleration is in the same direction as the car's motion because it is moving forward and speeding up.
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At any any procedure where velocity fluctuates.
What is acceleration, briefly?Acceleration is the general term for any process where the velocity changes. Because velocity is both a speed and a direction, there are only two ways to accelerate: altering your speed or changing your direction.If an object is accelerating and moving in the appropriate direction, it has positive acceleration. The speeding automobile in the first scenario showed positive acceleration. Since the car is moving ahead and accelerating, the acceleration is also travelling in the same direction.The change in velocity over a specific time period is known as acceleration. Any moment the speed or direction of motion changes, acceleration has taken place. Acceleration is zero at constant velocity. Negative acceleration or deceleration is the term for slowing down.To learn more about acceleration refer to
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Which of these is true for both natural and artificial selection?
A. They both occur randomly and spontaneously.
B. They both involve the extinction of unfit species.
C. They both result in the enrichment of certain alleles over others.
D. They both require human involvement to choose the most desirable traits
Answer:
c is answer
Explanation:
Humans allow only organisms with favorable traits to reproduce. Is this true of natural selection, artificial selection or both? Competition for resources determines reproductive success.
part beach child holds the end of a rope and child b pulls on the rope so that he moves toward child a. how far will child b have moved when he collides with child a?
3.813m far will child b have moved when he collide with child a.
We know that,
[tex]x_{cm}[/tex]=[tex]\frac{m_{a} x_{a} +m_{b} x_{b} }{m_{a}+x_{b} }[/tex]
[tex]x_{cm}[/tex]=26(0)+49(11)/26+49=7.187
A=From a is 7.187m
B=we forces know that, the internal can't change the motion of CM. SO they will meet Collide at their C.M.
B has to move the distance from B→C.M. So they will meet Collide at their C.M B will forces.
11-7.187 = 3.863
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