It will decompose to 1/100 of its initial mass in 53.4 days.
How long before half of a sample of 131i decays?A radioisotope with an 8-day half-life is iodine-131. By emitting beta particles, it decomposes into xenon-131. Any sample of iodine-131 will have lost half of its atoms after eight days, leaving the sample with a composition of 50% iodine-131 and 50% xenon-131.
How is decay rate determined?The deterioration rate is expressed as a percentage. The decimal equivalent can be obtained by simply reducing the percentage and multiplying it by 100. Therefore, it is possible to determine the decay factor b = 1-r. For instance, the exponential function's decay rate is 25% if the rate of decay is 0.25 and b = 1- 0.25 = 0.75 for the decay factor.
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When 150 joules of work is done on a system by an external force of 15 newtons in 20. Seconds, the total energy of that system increases by.
That system now has 150 Joule more energy overall. The apt response is choice (1)
Given that a 15 newton external force exerts 150 joules of work on a system in 20 seconds
The system's momentum is equal to its impulse.
This is,
Ft = mV
15 x 20 = mV
mV = 300 Ns
Since energy equals labour,
W = 1/2mV x V
150 = 0.5 x 300V
V = 1 m/s
With this, we can determine the distance traveled and the acceleration.
Using the first law of motion,
V = u + at
1 = 0 + 20a
a = 1/20
a = 0.05 m/
utilizing linear motion's third equation.
= + 2aS
All parameters are substituted in the equation.
= 0 + 2 x 0.05 S
S = 1/0.1
S = 10 m
The taskdone = Force x distance
The work done = 15 x 10
The work done = 150 Joule.
Therefore, the total energy of that system increases by 150 Joule.
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The graph shows the angular velocity 0; and angular acceleration a, versus time for a rotating body. At which of the following times is the rotation slowing down? A. t=1s B.1=2 s Cr=35 D. =4s E. 1= 5 s
A spinning body's angular acceleration and velocity are shown against time in the graph. The rotation is slackening at t=3s.
Formula for Angular Acceleration The rate at which the angular location of a spinning body changes is known as its angular velocity and is denoted by the formula: ω = θ t . ω = Angular Velocity is used here. θ = Rotated Angle. t = Duration. The angular acceleration is zero when the angular velocity is constant. If you are unable to utilize calculus, you may determine the angular velocity by looking at the area under the graph of angular acceleration over time. Angular Speed. Consider a body that is rotating about a fixed axis. The body gradually alters its angle after that.
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What was the original purpose of sonar?
Leonardo da Vinci utilised a tube introduced into the water to listen for vessels in order to employ the technology for the first time, in 1490.
What was employed before to sonar?
To combat the rising threat of submarine warfare, it was developed during World War I, and by 1918, a functioning passive sonar system was in use.
An overview of sonar technology. Measuring depth is a key component of seafloor mapping. Prior to the First World War, lead lining was typically used to gauge ocean depth. This required lowering a piece of lead—typically a cannonball—to the ocean floor on a very long piano wire.
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How do you find wavelength with frequency and length of a string?
The wavelength of a wave traveling along a string can be calculated using the following formula:
What is wavelength?
Wavelength is the distance between two consecutive points of the same phase on a wave. It is the distance traveled by a wave in one period (the time it takes for the wave to complete one cycle). The wavelength is usually denoted by the Greek letter lambda (λ).
wavelength = speed of wave / frequency
The speed of a wave traveling along a string is equal to the square root of the tension in the string divided by the mass per unit length of the string. If you know the tension in the string and the mass per unit length of the string, you can use the following formula to calculate the speed of the wave:
speed of wave = sqrt(tension / (mass per unit length))
Once you have the speed of the wave, you can use the formula above to calculate the wavelength.
Alternatively, if you know the length of the string and the frequency of the wave, you can use the following formula to calculate the wavelength:
wavelength = length of string / number of waves
In this case, the number of waves is equal to the frequency of the wave multiplied by the time it takes for one wave to pass a fixed point.
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Speed is distance over time, so v = λ / T. The frequency, f, is 1/T, so the equation relating wave speed, frequency, and wavelength is v = f λ . where µ = m / L is the string's mass per unit length.
What is wavelength?
Wavelength is the distance between two consecutive points of the same phase on a wave. It is the distance the wave travels in one period (the time it takes for the wave to complete one cycle). Wavelength is usually denoted by Greek letter lambda (λ).wavelength = wave speed / frequencyThe speed of a wave traveling along a string is equal to the square root of the tension in the string divided by the mass per unit length of the string.To know more about wavelength, click the link given below:
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a a 10000 kg train was moving with 48m/s then starts decelerate with constant rate to stop on its stationary that is found 192m away so the train slides through this distance and stops. how long the train did takes to stops
Answer:
First we need to calculate how fast it goes.
192m / 48m per second = 4 seconds
Then calculate the 4 seconds with the weight of the train.
10000 kg x 4 seconds = 40,000 seconds.
That means the train traveled 192 meters in 40,000 seconds.
An animal moves a distance of 160m in 40 seconds. Calculate the speed.
Answer:
To calculate the speed of the animal, we need to divide the distance it travels by the time it takes to travel that distance. In this case, the distance is 160 meters and the time is 40 seconds, so the speed is:
speed = distance / time = 160m / 40s = 4 m/s
This means that the animal was moving at a speed of 4 meters per second.
Explanation:
a slingshot consists of a light leather cup attached between 2 rubber bands. if it takes force of 32 N to stretch the bands 1,2 cm what is the equilibrium spring constant of the 2 rubber bands
The equivalent spring constant of the two rubber bands is 2667 N/m
We can solve the problem by using Hooke's law, which states that the strain of the material is proportional to the applied stress within the elastic limit of that material. This can be represented by the formula:
[tex]F=-kx[/tex]
where
F is the force applied to the rubber bands
k is the equivalent spring constant of the two rubber bands
x is the stretching constant of the two rubber bands
In this problem, we have been given the following values
F = 32 N is the force applied
x = 1.2 cm
= 0.012 m is the stretching of the bands
Solving for k, we find the equivalent spring constant of the two rubber bands:
[tex]k=\frac{F}{x}[/tex]
k=[tex]\frac{32}{0.012}[/tex]
k = 2667 N/m
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rita accelerates a 0.40-kg ball from rest to 9.0 m/s during the 0.15 s in which her foot is in contactwith the ball. what average force does she apply to the ball during the kick?
Rita applies an average force of 24 Newton to the ball during the kick.
What is acceleration?Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).
Given that Rita accelerates a 0.40-kg ball from rest to 9.0 m/s during the 0.15 s.
The acceleration of the ball = change in speed / time interval
= ( final speed - initial speed) / time interval
= ( 9.0 m/s - 0 m/s)/0.15 s
= 60m/s^2.
Hence, according to Newton's 2nd law of motion:
The average force applied to the ball = mass × acceleration
= 0.40 kg × 60m/s^2.
= 24 Newton.
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Can somebody answer this
Any of a clear glass plate, metal plate or brown paper can be stuck into the circle to help people notice the door (option D).
What is a glass door?A glass door is a door made of glass, usually in a wood or metal frame.
Glass doors are a gorgeous way of opening up a home to create more visual space and brighten up any room. Letting in natural light not only looks beautiful, but helps to save on electricity as well.
Toughened glass doors provide a safe, sturdy and stylish solution for interior doors in your homes or offices.
Glass doors are an especially nice option for homeowners with pets, particularly cats or dogs who like to look outside and watch the natural wildlife roam about.
According to this question, the above image shows glass doors that fit into many offices. However, sometimes, people in a hurry may not see them and bang into them.
Therefore, option D is the best and correct option.
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identify the surface whose equation is given. rho2(sin2(φ) sin2(θ) + cos2(φ)) = 9
In this diagram, heat energy is being added over time. The vertical axis shows an increase in temperature, and the horizontal axis shows the passage of time. In the diagram, the solid eventually becomes a gas. What will happen to bring the substance from a solid to a gas? Responses Energy will be taken away. Energy will be taken away. Energy will be added. Energy will be added. The substance will lose volume. The substance will lose volume. The substance will lose pressure.
As the solid is turned into gas, energy would be added to the solid.
What is a heating curve?We know that the heating curve has to do with the diagram that shows the way and manner in which the temperature of a body changes as it is converted from solid to gas. We know that heat is that kind of energy which is able to cause the temperature change of a body.
There are stronger intermolecular interactions that holds the substance together in the solid state than there is in the liquid state. The implication of this is that more energy must be supplied so as to break these strong interactions and take the substances from solid to gas.
In the gaseous state, there is minimum intermolecular interactions and the particles of the substance are moving freely.
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What are the similarities and differences between solar and wind energy?
Solar energy is less effective than wind energy. The atmosphere receives less CO2 from wind turbines. Solar panels emit 70 grams of CO2 per hour, compared to 4.64 grams per hour from wind turbines.
What are the parallels between solar and wind energy?The renewable energy sector features two major players: wind and solar power. In addition to reducing carbon emissions from fossil fuels, they also serve as endless energy sources.
How do wind energy and wind power differ from one another?The technique of using the wind to produce mechanical or electrical power is referred to as "wind power" or "wind energy," respectively. You can use this mechanical power for certain purposes or turn it into electricity using a generator.
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Can somebody answer this
Answer:
D
Explanation:
What does N1 mean on a calculator?
Changes using the SET UP menu and indicates the notation used to show a value. On the screen, N1 is shown as "NORM1," and N2 as "NORM2." An angular unit indicator is DEG, RAD, or GRAD. BUSSY: Shows up while performing calculation.
What does the calculator's c1 stand for?Any constant that can be used in place of c1 to determine whether an answer is correct. The format ck is used to express constants, where c is any constant and k is an additional iteration of the constant that can range from 1 to 255.
What does C stand for on a calculator?Only the C and CE functions on a calculator have the potential to be a little confusing when used. A way is both buttons. The C (clear) button will clear all input to the calculator, whereas the CE (clear entry) button will clear the most recent entry.
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Who mapped the ocean floor using sonar?
Marie Tharp was a geologist and a cartographer who was born in Michigan in 1920. Tharp was the first to map the ocean floor using science, working with her colleague Bruce Heezen. As a geologist with Stanolind Oil in the 1940s, Tharp started her career in science.
Does sonar help with ocean floor mapping?
The ship broadcasts multibeam sonar waves. Multibeam "paints" the bottom in a fan-like pattern by emitting roughly 1500 sonar soundings per second. In doing so, a thorough "sound map" that displays ocean depth, bottom type, and topographic features is produced.
The type of bottom, including whether it is coral- or seagrass-covered, sandy, soft, or covered with other soft vegetation, can be determined by the echo's intensity.
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Label the parts of the cerebellum, Part A Drag the appropriate labels to their respective targets. Reser He Cerebellar cortex Posterior lobe Anterior lobe Arborvita Chord plerus Pons Fourth ventricle Medulis oblonga Folie
Pons, Fourth ventricle, Choroid plexus, Medulla oblongata, Anterior lobe, Arbor vitae, cerebellar cortex Posterior lobe, Folia are parts of brain.
Pons which is one of structure of the brain stem, which helps in the passage of pyramidal tract which is descending tract or corticospinal tract
Fourth ventricle
One of major ventricle of the brain which is filled with the cerebrospinal fluid which is formed from the choroid plexus of the ventricles, which is located near the cerebellum and pons and medulla oblanagata
Choroid plexus
A network of the blood vessels in the each ventricle here it is in the fourth ventricle major function is the production of the cerebrospinal fluid.
Medulla oblongata
one of structures in the brain stem along with Pons and midbrain, which vital centers they are : cardiac , respiratory centres which regulates their functions, labelling in the left side of the Diagram from top to bottom.
Arbor vitae
Which is cerebellar white matter Branching and appearance as tree which brings sensory and motor information to and from cerebellum cerebellar cortex
Cerebellar cortex is the portion of the cerebellum separated from the Posterior lobe by the primary fissure, helps in the mediating the unconscious proprioception
Posterior lobe
which is another lobe of the Cerebellum separated from the anterior lobe by the primary fissure helps in the fine motor coordination
Folia :
The Cerebellar cortex is deeply grooved and appears as thin transverse leaves called folia, which Increases the surface area of Cerebellum thereby increase the cell number.
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the position-versus-time plot of a boat positioning itself next to a dock is shown in the figure
The ranking in the order of increasing velocity is D, C, E, A =F, B.
We know slope of a position time graph gives the value of velocity.
An upward slope gives positive velocity and a downward slope gives negative velocity.
slope m = position/time = velocity
Slope is negative at points D and C, but is more negative at D.
Positive slopes are at points A,E,F,B.
If we look at the slopes, we can easily say that slopes are zero at A and F and is maximum positive at B.
So, we have ranking in order of increasing velocity as D C E A=F, B
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Question 20These are the predecessor building blocks for neurotransmitters.1.affinity2.synaptic vesicles3.none of these are correct4.enzyme5.precursor
The neurons typically include enzyme precursors. A chemical substance that block a neurotransmitter's activity is constantly present in neurons.
These substances are released by the postsynaptic neurons' receptor cells, which then take them in and bind them. The following techniques can be used to limit neurotransmitter activity: Excitatory, inhibitory, and modulatory neurotransmitters make up the list of neurotransmitters. The potential for action of a target cell is increased by excitatory neurotransmitters. By promoting cell relaxation, inhibitory neurotransmitters reduce the potential activity of a receptor cell. Therefore, improper glutamate neurotransmission plays a role in the emergence of epilepsy as well as cognitive and affective disorders. The inhibitory neurotransmitter serotonin (5-hydroxytryptamine, 5-HT) has been discovered to play a crucial role in mood and emotion.
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what are directions of acceleration and net force if the speed of an object is changing while rotating in a circular motion?
In circular motion, an object is constantly changing direction, so its acceleration is always directed towards the center of the circle. This type of acceleration is called centripetal acceleration.
The net force acting on the object is also directed towards the center of the circle and is called the centripetal force. The magnitude of the centripetal acceleration and the centripetal force depend on the speed of the object, the radius of the circular path, and the mass of the object. They can be calculated using the following formulas:
Centripetal acceleration (a):
a = v^2/r
where v is the speed of the object, and r is the radius of the circular path.
Centripetal force (F):
F = ma = m(v^2/r)where m is the mass of the object.
So, if the speed of an object is changing while it is rotating in a circular motion, the direction of the acceleration and the net force acting on the object will always be towards the center of the circle. The magnitude of the acceleration and the force will depend on the speed, radius, and mass of the object.
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a tug-of-war that results in one team pulling the other across the line is an example of
A tug-of-war that results in one team pulling the other across the line is an example of reaction force.
What is reaction force?A reaction force can be described as the consequence of an action force which is opposite in direction.
It should be noted that the Newton's third law of motion is the one that deals with these two forces, which can be considered as the action and reaction forces however the Newton's third law made us to understand that for every action, there is an equal and opposite reaction, hence the case above can be seen as an example of reaction force.
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What is the speed of wavelength 3?
0.3 m/s is the speed of a wave with a wavelength of 3m and a frequency of 0.1 HZ.
What is a speed of a wave?Wavelength and frequency are both correlated with wave speed. The distance between the respective points of two consecutive waves is known as the wavelength. The number of waves passing at a specific spot at any given time is known as the wave frequency. Consequently, the equation below illustrates how three components are connected.
Solution:Wave speed = Wavelength x Wave frequency
given:
wavelength = 3 m
frequency = 0.1 Hz.
So, the wave speed is
Wave speed = 3 x 0.1 = 0.3m/s
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What principle is responsible for alternating light and dark bands when light passes through two or more narrow slits a refraction c diffraction B polarization D interference?
It is possible to see a distinctive pattern of brilliant and dark fringes when monochromatic light reaches a distant screen through two small apertures. By superimposing overlapping light waves coming from the two slits, this interference pattern is produced.
What principle causes bands of light and darkness to alternate as light passes through two or more objects?On the lit screen, the intensity pattern that results is determined by the superposition principle. When an integral number of wavelengths (0,, 2,...) is equal to the difference in routes from the two slits to a spot on the screen, constructive interference occurs.
What fundamental premise underlies interference?The concept of superposition, The most critical concept in interference is the superposition principle.
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Brooklyn, Ava, Jadya, Bri, and Gabby are invited to the “We are the quiet, good kids' ' party. At the party, they take turns riding a new super cool motorbike. Each student rides 2.8 km on the bike. Brooklyn has a time of 6 minutes, 13 seconds. Ava has a time of 6 min 3 sec. Jayda has a time of 5 min 57 sec, Bri has a time of 5 min 33 sec and Gabby has a time of 6 min 48 sec. Calculate each Good kid's velocity.
The velocity of each good kids are:
The velocity of Brooklyn is 7.5 m/sThe velocity of Ava is 7.7 m/sThe velocity of Jadya is 7.8 m/sThe velocity of Bri is 8.4 m/sThe velocity of Gabby is 6.9 m/sHow do I determine the velocity?The velocity of each good kids can be obtained as illustrated below:
For Brooklyn
Distance = 2.8 Km = 2.8 × 1000 = 2800 mTime = 6 mins 13 s = (6 × 60) + 13 = 373 sVelocity =?Velocity = distance / time
Velocity = 2800 / 373
Velocity = 7.5 m/s
For Ava
Distance = 2.8 Km = 2.8 × 1000 = 2800 mTime = 6 mins 3 s = (6 × 60) + 3 = 363 sVelocity =?Velocity = distance / time
Velocity = 2800 / 363
Velocity = 7.7 m/s
For Jadya
Distance = 2.8 Km = 2.8 × 1000 = 2800 mTime = 5 mins 57 s = (5 × 60) + 57 = 357 sVelocity =?Velocity = distance / time
Velocity = 2800 / 357
Velocity = 7.8 m/s
For Bri
Distance = 2.8 Km = 2.8 × 1000 = 2800 mTime = 5 mins 33 s = (5 × 60) + 33 = 333 sVelocity =?Velocity = distance / time
Velocity = 2800 / 333
Velocity = 8.4 m/s
For Gabby
Distance = 2.8 Km = 2.8 × 1000 = 2800 mTime = 6 mins 48 s = (6 × 60) + 48 = 408 sVelocity =?Velocity = distance / time
Velocity = 2800 / 408
Velocity = 6.9 m/s
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Which has the events in the right order, from early to late?
a. Quark soup
b. protons form
c. nucleosynthesis
d. atoms form
e. estar formation.
The events in the right order from early to late are Quark soup, protons form, nucleosynthesis, atoms form and estar formation.
Quark soup, also known as quark-gluon plasma, is a substance made of quarks and gluons, the most fundamental known building components of matter, and is precisely what its name implies: a liquid-like substance.
The latest study demonstrates that it is possible for scientists to actually produce a molten soup of the quarks and gluons that make up protons and neutrons.
The process of creating new atomic nuclei—the protons and neutrons that make up an atom's center—is known as nucleosynthesis. Within a few minutes after the Big Bang, the process of nucleosynthesis began.
Protons and neutrons began to form approximately one tenth of a second after the Big Bang, and within a few minutes these particles bonded to create atomic nuclei, primarily hydrogen and helium.
Star formation itself is the main process in the proto-galaxy units. We are aware that star formation occurs in massive gas clouds that are collapsing, and that it can occur under a variety of conditions that cause stars to form slowly.
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Which of the following planets or moons has an atmosphere consisting mainly of Hydrogen and Helium with some methane?
A) Venus
B) Saturn
C) Titan
D) Uranus
Saturn is the following planet or moon, and its atmosphere is primarily made of hydrogen with a small amount of methane.
The correct answer is B
What makes Saturn the best planet?The planet Saturn is incredibly large and its rings make it incredibly gorgeous. Amazing moons as Titan reside there as well. The Solar System's Saturn is arguably the most popular and stunning planet. Compared to the rings of other planets, Saturn's are much larger and easier to see.
Where could we possibly live?Then, only a year ago, researchers found a second Earth-like planet around Proxima Centauri, one of our nearest nearby stars. The best option we now have for maintaining human life is this planet.
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What is transversal class 7?
Transversal class 7 is a type of math class that focuses on developing skills related to problem solving, logical reasoning, and critical thinking. It usually covers topics such as algebra, geometry, statistics, probability, and calculus.
Transversal class 7 is a type of math class that is designed to help students develop their problem-solving, logical reasoning, and critical thinking skills. It typically focuses on several topics such as algebra, geometry, statistics, probability, and calculus. Students learn to apply the principles and concepts of these topics to solve problems. They also develop strategies for approaching difficult problems and are encouraged to think outside the box. Transversal class 7 is an important class for students to take as it can help them develop skills that they will use throughout their academic and professional lives. It also helps to prepare them for higher level math classes such as calculus and linear algebra.
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a ball of mass m is droppe dfrom rest at a height h and collides elastically with the floor, rebounding to its original height. what is the magnitude of the net impulse on the ball during the collision with the floor
The duration of the ball's contact with the ground cannot be calculated without knowledge of mass.
What are some instances of mass?We see mass in everything around us. For instance, objects like a table, chair, bed, football, glass, and sometimes even air have mass. All items have mass, which determines whether they are light or heavy.
What really is mass in plain English?An object's mass is determined by how much matter it has. Anything that has more substance will weigh heavier overall. For instance, because an elephant contains more stuff than a mouse does, it has a heavier mass. However much matter an object contains is not determined by size.
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determine the velocity of point a on the rim of the gear at the instant shown.(figure 1)
The velocity component of x is (v a)x = 3.97 ft/s, the velocity component of y is (v a)y = 3.29 ft/s.
Referencing Fig. a's kinematic diagram of the gear and applying the relative velocity equation to locations B and C,
V b = V c + ω × r b/c
3 i = - 4 i + (-ω k) × 2.25 j
3 i = (2.25 ω - 4) i
Equating the i components yields,
3 = 2.25 ω - 4
ω = 3.11 rad/s
For points A and C,
V b = V c + ω × r b/c
(v a)x i + (v a)y j = -4i + (-3.11) k × (-1.061 i + 2.56 j)
(v a)x i + (v a)y j = 3.97 i + 3.29 j
Equating the i and j components yields on both sides,
(v a)x = 3.97 ft/s
(v a)y = 3.29 ft/s
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Saair rushes to her car in order to hurry home and dressed for work . Failing to realize the dangers to driving under slick and icy conditions, she collides her 976.0 kg Mazda Miata into the rear of a 3178.p kg pick up truck which was at rest at the light on Lake Avenue . Ima's per-collision speed was 12.0 m/s . Determine the collision speed of the two entangled cars as they slide across the ice
The post collision speed of the Mazda Miata and the pick up truck as they slide across the ice are respectively 6.36 m/s and 5.64 m/s.
What is elastic collision?An elastic collision is one in which the system does not experience a net loss of kinetic energy as a result of the collision.
Given that masses of the Mazda Miata and the pick-up truck are respectively 976.0 kg and 3178.0 kg.
Pre-collision speed of Ima = 12.0 m/s.
As the collision is elastic in nature,
The post collision speed of the Mazda Miata =
{(976.0 - 3178.0)/(976.0 - 3178.0)} × 12.0 m/s
= - 6.36 m/s.
The post collision speed of the pick up truck =
{(2×976.0)/(976.0 - 3178.0)} × 12.0 m/s
=5.64 m/s.
Hence, the post collision speed of the two entangled cars as they slide across the ice are respectively 6.36 m/s and 5.64 m/s.
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What are the 4 types of genetic disorders?
Chromosome abnormalities, Multifactorial genetic inheritance disorders, Single-gene inheritance diseases, and Mitochondrial genetic inheritance disorders are the four primary categories.
What genetic condition is most prevalent?In the US, the most prevalent and lethal genetic disease is cystic fibrosis (CF). In the US, the illness affects about 30,000 people.
Describe a typical genetic condition.inherited disorders. Sickle cell illness. Cystic fibrosis Fibrosis Cystic a liver condition. brain, spine, and nerves. genes moving from one chromosome to another due to deletions, which are missing sections of chromosomes (called a translocation) damage to chromosomes (changes in the number or structure of complete chromosomes, the structures that make up chromosomes) or an additional or missing chromosome caused by gene mutations and environmental factors.
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