The amount by which the runner's Achilles tendon will stretch depends on the elastic modulus of the tendon, which is a measure of its stiffness. The elastic modulus of the Achilles tendon varies depending on factors such as age, sex, and physical activity level. However, in general, tendons are stiffer than muscles and can withstand larger forces before reaching their maximum stretch.Assuming that the runner's Achilles tendon is under an 8.0 times body weight force, we can use Hooke's law to estimate the amount of stretch. Hooke's law states that the amount of stretch of an elastic material is directly proportional to the force applied to it, as long as the force is within the material's elastic limit. Beyond this limit, the material will experience plastic deformation and will not return to its original shape.To calculate the stretch of the Achilles tendon, we would need to know its elastic modulus and its cross-sectional area. Without this information, we cannot provide a specific answer to the question. However, it is important to note that excessive stretching of the Achilles tendon can lead to injury, such as tendinitis or a ruptured tendon, so runners should take care to warm up properly and gradually increase their training intensity to avoid overloading the tendon.
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The runner's achilles tendon will stretch significantly if a maximum force of 8.0 times his weight is placed on it, as this is a typical force experienced while running.
The amount of the tendon's stretch will depend on the force applied and the flexibility of the tendon itself. Generally, an achilles tendon is able to handle forces up to 1.5 times its resting length before it will stretch and tear.
So, for a force of 8.0 times a runner's weight, the achilles tendon will stretch approximately 5.3 times its resting length. This is a significant amount of stretch and it is important for a runner to ensure their achilles tendon is warmed up and flexible prior to running in order to reduce the risk of injury.
Additionally, the runner should also ensure their running shoes have adequate cushioning to absorb the force of impact on their achilles tendon.
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For a skateboard with a negative acceleration, which of the following statements is always true?
1. The initial velocity of the skateboard will be greater than it’s final velocity.
2. The skateboard will have a negative displacement.
3. The final velocity of the skateboard will be positive.
4. The final velocity of the skateboard will be negative
5. The skateboard is losing speed
With a negative acceleration, the skateboard's beginning velocity will be higher than its end velocity.
The correcty answer is 1
How do you calculate beginning velocity in the absence of time?Based on the assumption that the object's energy is conserved, its velocity equals the square root of twice square product of the its acceleration or the distance it travels. This relationship also depends on the object's initial velocity.
What are starting and final velocities?When gravity first exerts force on an object, its initial velocity indicates how quickly it moves. The final velocity, on the other hand, is a vector quantity that determines the rate and direction of the a moving body when it has reached its maximum velocity.
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Which of the following best describes the composition of the particles forming Saturn's rings?
A) metallic grains
B) hydrogen and helium
C) methane ice
D) water ice
E) volcanic rock
The composition of the particles forming Saturn's rings is primarily made up of water ice.So option D is correct.
The Saturn's Rings are the set of 7 rings that surround the planet of Saturn. They are the most noticeable feature of Saturn and are classified according to their order in the planet, starting from the closest ones (D Ring) and ending with the farthest ones (F Ring). Each of the rings is made up of millions of individual objects ranging in size from tiny grains to enormous chunks that are miles in diameter.The composition of the particles forming Saturn's rings:Saturn's rings are formed of many tiny ice particles, which range in size from tiny grains to objects that are several meters in diameter. The rings are comprised of 99.9 percent ice, which is mostly water ice, but also some methane and ammonia ice. The ice particles in the rings are coated with silicates, carbon, and organic materials, and their size distribution ranges from smaller than a grain of sand to larger than a house.
Therefore option D is correct.
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The engine of a motorcycle changes the speed of the motorcycle from 16 m/s to 20 m/s in 10.0 s. The mass of the motorcycle is 300 kg.
What is the acceleration of the motorcycle **use a kinematic equation**?
What net force must the engine be producing?
If there is a frictional force pushing backwards at -50 N, what force must the engine produce to produce the same change in speed **Think how you would get the net force with this -50N?
an oil has a kinematic viscosity of 1.25e-4 m2/s and specific gravity of 0.8. what is the dynamic (absolute) viscosity in kg/m.s?
The dynamic (absolute) viscosity of the oil is 0.1 kg/m.s.
To find the dynamic viscosity (in kg/m.s), we can use the relationship between kinematic viscosity and dynamic viscosity, which is:
dynamic viscosity = kinematic viscosity x density
where density is given by the specific gravity multiplied by the density of water at 4°C, which is 1000 kg/m^3.
Substituting the given values,
density = specific gravity x density of water = 0.8 x 1000 kg/m^3 = 800 kg/m^3
dynamic viscosity = kinematic viscosity x density = 1.25e-4 m^2/s x 800 kg/m^3 = 0.1 kg/m.s
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What are the three components of the cell theory
Answer:
The first component of the cell theory says that all living things are made of cells. The second component of the cell theory states that cells are the basic structure and function of living things. The last component of the cell theory says that cells come from other cells.
Explanation:
Srry this took so long but hope this helps this is also the right answer have a good day
(P.S please mark the helpfull )
A device does 2000 J of work in 10 seconds what is the power of the device
Answer:
D.20 W
Explanation:
P=W/t
P=2000 J / 10 sec
p=200 Watts
does light travel faster in glass or air?
Light travels faster in air than glass
Answer:
\(\boxed{Air}\)
Explanation:
Light travels faster in the air than in glass because glass has a higher refractive index than air.
glass is solid and more packed than air, so the light will have more space and less resistance in the air to travel than in glass.
\(-TheAnimegirl-\)
These two skaters original at rest have just pushed off against one another. one skater has twice the mass as the other. which one will experience the greater momentum?
Answer:
These two skaters have just pushed off against one another .One skater has twice the mass as the other. Which one willexperience the greater momentum?
Explanation:
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If you look away from the road for just two seconds, your chance of having a crash actually _______________.
If you look away from the road for just two seconds, your chance of having a crash actually increases significantly. It is estimated that taking your eyes off the road for just two seconds doubles your risk of a collision.
This is because in that short amount of time, your vehicle can travel a considerable distance, and you may not be aware of potential hazards or changes in road conditions. It is essential to stay focused and alert while driving to ensure your safety and the safety of those around you.
A collision is an event in which two or more objects come into contact with each other, resulting in a transfer of energy and/or momentum between the objects. Collisions can be classified into different types based on the nature of the contact, the forces involved, and the resulting motion of the objects.
Elastic collisions occur when the objects bounce off each other without any deformation or loss of kinetic energy. In this type of collision, the total kinetic energy of the system is conserved. An example of an elastic collision is the collision between two billiard balls.
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Full question:
If you look away from the road for just two seconds, your chance of having a crash actually __________.
Looking away from the road for just two seconds significantly increases your chance of having a crash because it means you're not fully focused on driving. This lack of focus is a major cause of accidents. Therefore, continued attention on the road is vital.
Explanation:If you look away from the road for just two seconds, your chance of having a crash actually increases significantly. This is because 2 seconds is a substantial amount of time in a high-speed situation, where situations and obstacles can arise suddenly. Taking your eyes off the road when driving means you are not fully focused on the task, which is a major cause of accidents. It is essential to maintain complete attention when driving to prevent potential hazards and to react quickly to changing circumstances.
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What would happen to the boiling point of water at 8000 m above sea level where air pressure is lower
Answer:
As altitude increases and atmospheric pressure decreases, the boiling point of water decreases.
The observation that energy transformations are rarely 100% efficient is seen by scientists as a violation of the Law of Conservation of Energy.
true or false ???
Answer:
l
Explanation:
Answer:
true I believe
Explanation:
What makes LED lightbulbs more efficient than incandescent lightbulbs?
Answer:
The color
Explanation:
The color lets you see things more brightly because of what's in it that incandescent lightbulbs don't have.
Answer:
LED lightbulbs don't give off a lot of heat unlike incandescent lightbulbs. LED are also efficient in the consumption of energy. Incandescent lightbulbs use alot of power to produce the amount of light an LED lightbulb produces.
A beam of light passes through water (n1=1.33) into a mystery substance at an angle of 43 (01) if the beam of the light refracts to an angle of 22 (02) in the mystery substance what is the refractive index (n2) of the mystery substance
The refractive index of the mystery substance is n2 = 2.17.
What is refractive index?Refractive index is a physical quantity that describes how light interacts with a particular material. It is defined as the ratio of the speed of light in a vacuum to the speed of light in the material. Refractive index is an important factor in optics, as it determines how much light is bent or refracted when it enters a material, and the angle at which it is refracted. Refractive index is also used to measure the thickness of a material or to calculate the index of refraction of a material. It is also used to determine the refractive properties of gemstones, for example in gemology.
The refractive index of the mystery substance (n2) can be calculated using Snell's law, which states that n1*sin(01) = n2*sin(02).
Therefore, n2 = n1*sin(01)/sin(02) = 1.33*sin(43°)/sin(22°) = 2.17
This means that the refractive index of the mystery substance is n2 = 2.17.
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6.(2) When X = 0.70, Y = 0.30, Z = 0.00, calculate the mean atomic mass, μ and He
To calculate the mean atomic mass, μ and He when X = 0.70, Y = 0.30, Z = 0.00, the following steps should be taken. The first step is to calculate the average atomic mass of the element.
This can be calculated using the following equation:μ = (X × mX) + (Y × mY) + (Z × mZ)where:X = the mass fraction of the first isotope Y = the mass fraction of the second isotopeZ = the mass fraction of the third isotopem X = the mass of the first isotope in atomic mass units (amu)mY = the mass of the second isotope in amumZ = the mass of the third isotope in amu The second step is to calculate the mass of He produced in the reaction. This can be done using the following equation:Mass of He = (Y × mHe) / 2where:mHe = the mass of helium in amuTo calculate the mean atomic mass, μ and He when X = 0.70, Y = 0.30, Z = 0.00, we can use the following values:X = 0.70Y = 0.30Z = 0.00mX = 12.00 amumY = 13.01 amumZ = 14.01 amumHe = 4.00 amu Using the equation above, we can calculate the average atomic mass as follows:μ = (0.70 × 12.00) + (0.30 × 13.01) + (0.00 × 14.01)= 8.40 + 3.90 + 0= 12.30 amu The mass of He produced can be calculated as follows:Mass of He = (0.30 × 4.00) / 2= 0.60 / 2= 0.30 amu Therefore, when X = 0.70, Y = 0.30, Z = 0.00, the mean atomic mass is 12.30 amu and the mass of He produced is 0.30 amu.For such more question on average
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What formula is used for the questions two forces of magnitude 5 Newton and 4 Newton act on a body of mass 4.0 kg at a right angle to each other determine the magnitude of the acceleration of the body
The magnitude of the acceleration of the body is approximately 1.802 m/s^2 when forces of magnitude 5 Newton and 4 Newton act on a body of mass 4.0 kg at a right angle to each other.
To determine the magnitude of the acceleration of a body when two forces act on it at a right angle, we can use the Pythagorean theorem and Newton's second law of motion.Newton's second law states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma). In this case, the net force is the vector sum of the two forces acting on the body.Using the Pythagorean theorem, we can find the magnitude of the net force. Let's call the force with magnitude 5 Newton as F1 and the force with magnitude 4 Newton as F2. The net force (Fnet) can be calculated as the square root of the sum of the squares of the individual forces: Fnet = sqrt(F1^2 + F2^2).Now we can substitute the net force into Newton's second law to find the acceleration (a). Rearranging the formula, we have a = Fnet / m.Plugging in the values, Fnet = sqrt(5^2 + 4^2) = sqrt(25 + 16) = sqrt(41) Newtons. The mass (m) is given as 4.0 kg.
Finally, the magnitude of the acceleration of the body is calculated as a = Fnet / m = sqrt(41) / 4.0 ≈ 1.802 m/s^2.
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A block is dragged along the following surfaces. Which would result in the greatest kinetic friction force?
highly polished table
rough table
sandpaper
The kinetic force would be equal for all surfaces.
Answer:b
Explanation:
The greatest kinetic friction force occurs when the block is dragged along Sand paper
Kinetic friction is defined as the force of friction that exists between two surfaces in contact as one surface moves over the other.
Many factors affects the magnitude of frictional force and prominent among those factors is the nature of a surface. Rough surface cause a greater frictional force than smooth and highly polished surfaces or smooth surfaces.
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a fairly common chronic inflammatory disease of the alimentary canal involving all layers of the bowel, which causes chronic diarrhea, is
Inflammatory Bowel Disease (IBD) is a prevalent chronic inflammatory condition affecting the entire gastrointestinal tract, leading to persistent diarrhea.
Inflammatory Bowel Disease (IBD) encompasses two main conditions: Crohn's disease and ulcerative colitis. Both of these diseases cause inflammation and damage to the digestive tract, resulting in chronic diarrhea. Crohn's disease can affect any part of the gastrointestinal tract, from the mouth to the anus, while ulcerative colitis specifically affects the colon and rectum.
The inflammation in IBD occurs due to an abnormal immune response, where the body's immune system mistakenly attacks the healthy cells in the digestive tract. The exact cause of IBD is not yet fully understood, but it is believed to involve a combination of genetic, environmental, and immunological factors.
Chronic diarrhea is a prominent symptom of IBD, along with abdominal pain, cramping, fatigue, weight loss, and rectal bleeding. The disease often follows a relapsing and remitting course, with periods of active inflammation (flare-ups) alternating with periods of reduced or no symptoms (remission).
The diagnosis of IBD involves a thorough evaluation of symptoms, medical history, physical examination, and various diagnostic tests such as blood tests, endoscopy, colonoscopy, and imaging studies. Treatment for IBD aims to reduce inflammation, control symptoms, and prevent complications.
It usually involves a combination of medications, such as anti-inflammatory drugs, immunosuppressants, and biological therapies. In severe cases, surgery may be necessary to remove the affected portion of the bowel.
In conclusion, Inflammatory Bowel Disease (IBD) is a chronic inflammatory condition affecting the entire gastrointestinal tract, characterized by chronic diarrhea. It encompasses Crohn's disease and ulcerative colitis, which involve inflammation in different parts of the digestive tract. The underlying cause of IBD is complex and multifactorial.
Chronic diarrhea is a significant symptom, along with other gastrointestinal manifestations. Diagnosis involves a comprehensive assessment, and treatment focuses on reducing inflammation and managing symptoms through medication and, in some cases, surgery.
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You and your family are going on a trip in Europe. Calculate the speed in the following scenario. State how you calculated your answer and include correct units. A car travels 240 kilometers in 3 hours; What is the speed of the car during that time?
Answer:
22.2 m/s or 80 km/h
Explanation:
Given that
Distance travelled by the car, d = 240 km
Time taken by the car, t = 3 hours.
Speed of the car, v = ? m/s
for easy calculations, we will be converting the units to meters and seconds respectively.
240 km to meters would be
240 * 1000 m = 240000 m
3 hrs to seconds would be
3 * 60 mins * 60 seconds = 10800 s
now, we have our distance and time to be
d = 240000 m
t = 10800 s
speed is defined as the ratio of distance with respect to time taken, effectively,
Speed = distance/time
speed, v= 240000 / 10800
v = 22.2 m/s
therefore, the speed of the car during the time is 22.2 m/s, or if the speed is needed in km/h, we can convert it
22.2 * 3600/1000 =
80 km/h
2) Billy jumps upward with a velocity of 4.2 m/s off a 6m high diving board. What is his final velocity once he hits the water? And how long does it take for Billy to hit the water?
Answer:
The value of the final velocity is \(v = 11.6 \ m/s\)
Explanation:
Generally from kinematic equation
\(v^2 = u^2 + 2as\)
Here a is the acceleration which is equivalent to g
So
\(v^2 = u^2 + 2gs\)
substituting 6 m for s , 4.2m/s for u
\(v^2 = 4.2^2 + 2 * 9.8 * 6\)
\(v = 11.6 \ m/s\)
a magnetic field is not produced by a) stationary electric charge b) moving electric charge c) electric current d) an electromagnet e) current-carrying solenoid
The magnetic field will not be produced by the a) stationary electric charge.
A moving charge will always produce a magnetic field, and on the other hand, static charge no longer produces a magnetic field due to the fact it affects both the electric and magnetic field, additionally not able to offer any impact on the magnet. That's the reason a static charge doesn't produce a magnetic field.
But the moving electric charge, electric current, electro-magnet, and current-carrying solenoid will produce the magnetic field along the movement the charges in their system where the magnetic field will flow along the axis.
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solid forms of ice last longer because there is more weight with less surface area. (True or False)
The solid forms of ice last longer because there is more weight with less surface area. This statement is false.
Factors like temperature, shape, size, humidity and impurities are some of the factor decides the time for which the ice survives. Even though larger ice particles may have more surface area than solid forms of ice, this does not always imply that they will persist longer.
In reality, due to the insulating effect of the ice itself, larger ice formations, like glaciers, can melt more quickly. In the end, a complex combination of physical, chemical, and environmental elements determines how long ice will last.
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in a series connection of bulbs,if one bulb fails.why do all other bulbs go off
Answer:
Because in series, current flow through a single path only as it is same. Hence,if one fails the entire circuit breaks and other bulbs are switched off.
Explanation:
If you run 12 km at an average speed of 4 km/h, how much time does it take? ___ hours
What did classical physics predict would happen to the light given off by an
object as its temperature increased?
A. The wavelength of the light would decrease from visible light into
the ultraviolet range.
B. The color of the light would fade to black as the brightness
decreased.
C. The color of the light would change to white, and the brightness
would decrease.
D. The wavelength of the light would decrease from visible light into
the infrared range.
Answer:
The Wavelength of the light would decrease from visible light into ultraviolet range A P E X
Explanation:
Classical physics predict that as the temperature is increased, the wavelength of the light would decrease from visible light into more energetic ultraviolet range.
What is classical physics?When an electric charge vibrates, an electromagnetic wave is produced. Remember that heat is simply the kinetic energy of random motion. In a hot object, electrons vibrate in random directions and produce light as a result.
A hotter object produces more energetic vibrations, and thus emits more light —- it glows brighter. So far, so good. However, classical physics was unable to explain the shape of the blackbody spectrum.
As per the classical physics concepts, as the temperature increases, the wavelength of light becomes shorter and shifts to higher energy regions. Therefore, option A is correct.
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What is required for an electromagnet to produce a magnetic field that is
strong enough to be useful?
A. A coil of wire with current running through it
B. A magnetic metal core with wire wrapped around it
C. A permanent magnet
D. A magnetic metal core
SUBMIT
Answer:
A. A coil of wire with current running through it
Answer:if you have different ans your may be a soleno with a current running though it.
Explanation:
Ape.x
Lanzamos desde el suelo una pelota con un ángulo de 45° y queremos colarla en una cesta que está a 7 m de distancia horizontal y a 3.5 m de altura. Calcular con qué velocidad hay que lanzarla.
Answer:
v₀ = 11.72 m / s
Explanation:
This is a missile launch exercise. Let's write the relations for the final position
x = v₀ₓ t
y = \(v_{oy}\) t - ½ g t²
Let's use trigonometry to find the initial velocities
sin 45 = v_{oy} / v₀
cos 45 = v₀ₓ / v₀
v_{oy} = v₀ sin 45
v₀ˣ = v₀ cos45
we substitute
x = v₀ cos 45 t
y = v₀ sin 45 t - ½ g t²
in this equation system we have two unknowns and two equations for which it can be solved, let's substitute the values
7 = v₀ 0.707 t
3.5 = v₀ 0.707 t - ½ 9.8 t²
we clear the time in the first equation and substitute in the second
3.5 = v₀ 0.707 (7 / v₀ 0.707) - 4.9 (7 / v₀ 0.707) 2
3.5 = 7 - 480.345 / v₀²
480.345 / v₀² = 7-3.5
v₀² = 480.345 / 3.5
v₀ = √ 137.24
v₀ = 11.72 m / s
a jumbo jet has a mass of 100,000 kg. the thrust for each of its four engines is 50,000 n. what is the jet's acceleration when taking off?
If a jumbo jet has a mass of 100,000 kg and thrust for each of its four engines is 50,000 n, so the acceleration is 2 m/s².
What is the acceleration of a jet?From the question, we are told that
A jumbo jet has a mass of mj = 100,000 kg
The thrust is given F = 50,000 N
Due to four engines 4 x F
Ft = 4 x 50,000 n = 200000N
Acceleration = Ft/m
Substituting values = 2N/kg
N = kg. m/s²
So, a = 2 kg. m/s²/kg
Therefore, jet's acceleration when taking off is 2 m/s².
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an electric motor is used to lift a 10n load through 5m. the total amount of electrical energy is 65j. (¡)what is the amount of energy wasted by the motor? (ii)what is the efficiency of the motor?
0.769 joule is the amount of energy wasted by the motor
power=work done/time
power=10×5/65
power=0.769 joule
In physics, energy is the capacity to out work. It may take on several forms, including potential, kinetic, thermal, electrical, chemical, radioactive, etc. Heat and labor are two further examples of energy being transferred from one body to another. Once it has been transmitted in line with its nature, energy is always disseminated. Thus, although exertion can provide mechanical energy, heat transfer might produce thermal energy.
All types of energy have the characteristic of motion. For instance, a body has kinetic energy if it is moving. A tensioned item, such a spring or bow, may move even while at rest because of the device's design, which incorporates potential energy.
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a source of error in gps occurs when gps satellite signals reflect off surfaces, such as trees or buildings before they reach the gps receiver. this was called ________.
The given statement about GPS that reads "A source of error in GPS occurs when GPS satellite signals reflect off surfaces, such as trees or buildings before they reach the GPS receiver.
This was called multipath."The answer to the given question is "multipath" as the source of error in GPS occurs when GPS satellite signals reflect off surfaces such as trees or buildings before they reach the GPS receiver. This situation was called multipath, which creates interference with the signal that's why it should be avoided. Multipath is a common error that can reduce the accuracy of GPS. Multipath error occurs when the GPS signal reflects off the objects, and it takes multiple paths to reach the GPS receiver.
This causes the GPS receiver to calculate the wrong position. This results in the reduction of the accuracy of GPS.
The source of error in GPS occurs when GPS satellite signals reflect off surfaces, such as trees or buildings before they reach the GPS receiver. This was called multipath. Multipath is a common error that can reduce the accuracy of GPS. The GPS signal reflects off the objects and takes multiple paths to reach the GPS receiver. It causes the GPS receiver to calculate the wrong position. This results in the reduction of the accuracy of GPS.
GPS or Global Positioning System is a navigation technology used to determine the location, direction, and speed of the object. It is used in a wide range of applications, from aviation to shipping, from surveying to mapping, and from geology to farming. GPS is a system of satellites orbiting the earth, which transmits signals to the GPS receiver. The GPS receiver receives the signals and calculates the location of the object. GPS is an accurate and reliable navigation system, but it is not error-free. One of the sources of error in GPS is multipath.Multipath is a common error that can reduce the accuracy of GPS. It occurs when the GPS signal reflects off the objects, and it takes multiple paths to reach the GPS receiver. This causes the GPS receiver to calculate the wrong position.
This results in the reduction of the accuracy of GPS. Multipath is a significant problem in urban areas where there are many buildings and trees. The GPS signals can reflect off the buildings and trees, causing the multipath error. Multipath can be avoided by using the GPS receiver in an open area away from the buildings and trees.
The GPS receiver is an essential tool for navigation, mapping, and surveying. However, it is not error-free. Multipath is one of the sources of error in GPS that can reduce the accuracy of GPS. Multipath occurs when the GPS signal reflects off the objects and takes multiple paths to reach the GPS receiver. This causes the GPS receiver to calculate the wrong position. Multipath can be avoided by using the GPS receiver in an open area away from the buildings and trees.
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Once the offense comes to the line of scrimmage in one formation, it cannot change to another formation true or false
Answer:
False.
Explanation:
This question refers to the rules of American Football. Thus, the line of scrimmage is an imaginary boundary that is established between both teams, to which the offensive line and the defensive line go to start the play.
In this situation, the offensive team must have 7 players in its formation, but within this some players can perform certain movements, with which it is incorrect to say that the formation cannot be modified, since it is constantly seen as some players, such as wide receivers, for example, move during scrimmage formation.