The correct answer is Teflon
Numerous applications can be found for polytetrafluoroethylene (PTFE), a synthetic fluoropolymer of tetrafluoroethylene. It is one of the most popular and often used PFAS. Teflon, manufactured by Chemours, a division of DuPont, which made the compound's initial discovery in 1938, is the term by which PTFE-based materials are most generally recognized. Polytetrafluoroethylene, a high-molecular-weight polymer made entirely of fluorine and carbon, is a fluorocarbon solid. PTFE is hydrophobic, meaning that neither water nor things containing water can bind to it. This is because fluorocarbons only exhibit weak London dispersion forces since fluorine has a poor electric polarizability. One of the lowest coefficients of friction of any substance is found in PTFE. For pans and other cookware, polytetrafluoroethylene is utilized as a non-stick coating.
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An athlete runs a marathon 42 195 km in 2h 5mins 42s. Convert in to m/s
The Speed of the athlete is 5.59 m/s
What is the speed of the athlete in m/s?Speed is defined as the ratio of the distance covered and the time taken
Speed = distance/timeThe units of speed can either be m/s, km/hr, mil/hr, etc.
The distance covered by the athlete = 42.195 km
Distance in meter = 42195 * 1000 = 42195 m
Time taken = 2 * 3600 s + 5 * 60 s + 42 s
Time taken = 7542 s
Speed = 42195 m/7542 s
Speed = 5.59 m/s
In conclusion speed is ratio of distance and time taken.
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Someone one can answer with a dimensional analysis?
Using Dimensional analysis to calculate,
Dwight can grow 9600 beets on the 8 acres of land.
Michael can afford to buy enough pizzas.
Dimensional Analysis is a problem-solving technique that makes use of the fact that every number or statement may be multiplied by one without affecting its value. It is also known as the Unit Factor Method or the Factor-Label Method.
Using dimensional analysis to solve the given two problems,
a) 1/8 hectare = 150 beets
1 acre = 150 x 8 = 1200 beets
8 acres = 1200 x 8 = 9600 beets
Dwight can grow 9600 beets on the 8 acres of land.
b) 15 co-workers x 3 slices = 45 slices of pizza
No. of pizzas needed = 45/12 = 3.75 = 4 pizzas
Cost of pizzas = 19.50 x 4 = $78
Since Michael has $90, he can afford enough pizzas.
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What must the charge (sign and magnitude) of a 1.45 gg particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 530 n/cn/c?
- 2.186 x 10⁻⁵ C must the charge (sign and magnitude) of a 1.45 gg particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 530 n/cn/c.
Electric field:
E = F/q
E ⇒ The magnitude of electric field
F ⇒ Electric force on a test charge q
q ⇒ Magnitude of the point charge
The electric field E at a position P where a charged particle with charge q is subjected to an electric force F is specified by the aforementioned equation.
There are two possible test charges: positive and negative. The directions of E and F are the same if it is positive; if it is negative, they are the opposite.
F = mg = Eq
q = mg/E
= ((1.45 x 10⁻³ kg)(9.8 m/s²))/650 N/C
= 2.186 x 10⁻⁵ C
Since the force must go upward and the electric field is in the opposite direction, q must be negative.
q= -2.186 x 10⁻⁵C
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A glass stopper has a volume of 16 cm3 and a mass of 40g. calculate the density of glass in g/cm3 and in kg/m3.
A glass stopper has a volume = 16 cm^3
mass = 40 g
Therefore, density (g/cm^3) = MASS/ VOLUME
DENSITY = 40/16 g/cm^3
Density = 2.5 g/cm^3
In kg/m^3 => 2.5*10^-3 kg / 10^-6m^3 = 2500 kg/m^3
The definition of Density is the amount of matter in a given space, or volumeTo finding density D=m/v or Density = mass/volumeCommon units for density g/cm^3 or g/mL or kg/m^3 or kg/LDensity of water = 1 g/mLdensity is a physical propertyhelium is less dense than air while carbon dioxide is more dense than airSalt water is denser so we don't sink as easily.To know more about DENSITY visit : https://brainly.com/question/15164682
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When a ball thrown straight upwards reaches the very top of its path, its acceleration is:_______
When a ball thrown straight upwards reaches the very top of its path, its acceleration is: equal to zero (0)
The fact that the acceleration at the highest point of the ball's trajectory is equal to zero is related to the fact that a transition point is reached in which the acceleration that is equal to gravity goes from being negative when the ball is going up to becoming positive at the instant in which it begins to descend due to the effect of the force of gravity.
What is vertical launch upwards?In physics vertical launch upwards is the motion described by an object that has been launched vertically upwards in which the height and the effect of the earth's gravitational force on the launched object are taken into account.
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The isolated point charge of q = 15 nc is in a vacuum. determine (a) the magnitude of the electric field at point p that is 0.20 m to the right of the positive charge.
The magnitude of the electric field at point P which is 0.20 m to the right of the positive charge is 3,3375 N/C.
The electric field(E) due to an isolated point charge is
E= KQ/r^2
Here K is the Electrostatic Constant = 1/4π∈ = 9 x 10^9 N m^2/C^2
Q is the magnitude of the charge
r is the distance of the point from the charge
Putting q= 15 nC and r = 0.20 m in the given equation
E = 9 x 10^9 x 15 x 10^-9/(0.20)^2
E = 3375 N/C
Hence, the magnitude of the electric field at point p which is 0.20 m to the right of the positive charge is 3,3375 N/C.
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What currency forecasting technique links exchange rates to macroeconomic variables such as money supply and inflation?
Fundamental analysis forecasting technique links exchange rates to
macroeconomic variables.
What is Fundamental analysis?In accounting and finance, fundamental analysis refers to the examination of a company's financial statements, state of affairs, rivals, and markets.Additionally, it takes into account the economy's overall health as well as variables like interest rates, output, earnings, employment, GDP, housing, manufacturing, and management.
A technique for figuring out a stock's true or "fair market" value is fundamental analysis.Fundamental analysts look for stocks that are currently trading for more or less than what they are really worth.A buy recommendation is made for the stock if the fair market value is higher than the current market price, which indicates that it is undervalued.If the fair market value is less than the market price, the stock is regarded as overvalued, and if the stock is held, it may be advised neither to buy nor to sell.Technical analysts, on the other hand, favor analyzing the stock's historical price trends to forecast short-term future trends.
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A car accelerates at 2.0 m/s2 for 10 seconds. The car has an initial velocity of 10 m/s. What is the final velocity of the vehicle?
Answer: The final velocity will be 30 m/s
Explanation:
[tex]v_{i} = 10 m/s\\a = 2.0m/s^{2} \\t = 10s\\v_{f} = ?\\\\a = \frac{v_{f} - v_{i}}{t} \\2.0 = \frac{v_{f} - 10}{10} \\20 = v_{f} - 10\\v_{f} = 30[/tex]
Answer:
30 m/s
Explanation:
[tex]\boxed{\begin{array}{c} \text{\underline{The Constant Acceleration Equations (SUVAT)}}\\\\\begin{aligned}v&=u+at\\\\s&=ut+\dfrac{1}{2}at^2\\\\ s&=\left(\dfrac{u+v}{2}\right)t\\\\v^2&=u^2+2as\\\\s&=vt-\dfrac{1}{2}at^2\end{aligned}\end{array}}[/tex]
[tex]\boxed{\begin{minipage}{9 cm}s = displacement in m (meters)\\u = initial velocity in m/s (meters per second)\\v = final velocity in m/s (meters per second)\\a = acceleration in m/s$^{2}$ (meters per second per second)\\t = time in s (seconds)\\\\When using SUVAT, assume the object is modeled\\ as a particle and that acceleration is constant.\end{minipage}}[/tex]
Given:
u = 10 m/sv = a = 2.0 m/s²t = 10 sSubstitute the given values into v = u + at and solve for v:
[tex]\begin{aligned}v & = u+at\\\implies v & = 10 + 2(10)\\& = 10 + 20\\& = 30\; \sf m/s\end{aligned}[/tex]
Therefore, the final velocity of the vehicle is 30 m/s.
The dose of a drug is 500 mcg/kg of body weight. how many milligrams should be given to a child weighing 55 lb?
12.5 mg should be given to a child weighing 55 lb.
How is the dose of a drug determined when the body weight of a person is given?Some medications especially for children can be prescribed according to the particular person's body weight in (kg) or their body surface area in (m²).
You have to multiply the dose with the weight to determine the required dose and then substitute in other formula.
1 kg = 2 lb
1 lb = 1 / 2 kg
55 lb = 0.5 × 55
27.5 kg
Dose = 500 mcg/kg
Therefore Dose = 12.5 mg for a child weighing 55 lb.
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A researcher reports an f-ratio with df = 3, 36 for an independent-measures experiment. how many treatment conditions were compared in this experiment?
a) 36
b) 4
c) 39
d) 3
The correct option is B.
There were 4 treatment conditions compared in the experiment.
F ratio plays an essential role in performing a particular dataset of ANOVA. F ratio is particularly a ratio which is obtained by the between-group variance or it is also called MSB and also within-group variance known as MSW. Any F-ratio which is computed is compared with the critical F-ratios from the table as it will check out if there are any variations available between the groups or not.
The researcher reports an F-ratio where the degrees of freedom = 3, 36.
F-ratio is obtained by the calculation of dividing the Mean squared errors because of the treatment by the Mean squared error which occurs due to error.
For the particular case, the researcher reports an F-ratio having degrees of freedom = 3, 36. It is indicating that the treatments are being distributed with degrees of freedom which is 3 and specified errors are distributed with degrees of freedom which is 36.
Let the treatments which were involved in the study can be denoted by k.
Let the total number of individuals involved in the study can be taken as N.
Then, the treatments will be having degrees of freedom as,
[tex]df_{treatments}[/tex] = k-1
3=k-1
k=3+1=4
Therefore, the required treatment condition number that was compared is 4.
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Which form of electromagnetic radiation has a wavelength of 10-7 nanometers?
a. Gamma rays
b. Infrared
c. Ultraviolet
d. Radio waves
The form of electromagnetic radiation that has a wavelength of 10-7 nanometers is known as Ultraviolet. Thus, the correct option for this question is C.
What is Electromagnetic radiation?Electromagnetic radiation may be defined as a type of radiation that considerably possesses both electric and magnetic fields. Apart from this, these radiations always travel in waves. Electromagnetic radiations include visible light, radio waves, gamma rays, X-rays, etc.
Among all kinds of electromagnetic radiations, gamma rays have the shortest wavelength and high frequency. While microwaves have the longest wavelength and lowest frequency. As the wavelength and frequency are inversely related to one another.
Therefore, ultraviolet radiation is a type of electromagnetic radiation that has a wavelength of 10-7 nanometers. Thus, the correct option for this question is C.
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A large crate of emergency supplies is dropped from a hovering helicopter. the crate has fallen for 2.90 s calculate the displacement of the crate during this time.
By using uniform motion, the displacement of a fallen crate after 2.9 seconds is 41.209 meters.
We need to know about uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
t = 2.90 s
vo = 0 m/s
a = g = 9.8 m/s²
By substituting the given parameters, we can calculate the displacement with the third equation
s = vo . t + 1/2 . a . t²
s = 0 . 2.9 + 1/2 . 9.8 . 2.9²
s = 0 + 41.209
s = 41.209 m
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A ball is thrown straight upwards. at the very top of its flight the velocity of the ball is zero. what direction, if any, is the acceleration at this point?
The acceleration due to gravity is constant even at the top of its flight and its direction will be towards to ground (Downwards).
The horizontal distance of an object in projectile motion relative to its origin is referred to as its range. Only at the highest point of a thrown object's flight does vertical (y) speed equal zero. This component of velocity does not change over time since there is no horizontal acceleration in the absence of air resistance.
For many people, this is a counterintuitive idea. (Depending on the object, air resistance will result in a little or major drop in velocity. However, for the time being, this aspect is disregarded.) Gravitational acceleration must be included in a vertical motion, and as a result, the vertical velocity evolves with time.
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If we compare our place in the universe with a very distant place, we can say that:_____.
When we compare our place in the universe with a very distant place, we can say that all the laws of physics are the same in each place.
Physics laws are the result of scientific observations made after very long years. The nature of physics laws is absolute and remains intact even in the presence of external factors. They are conservative in terms of quantity, can be applied anywhere in the universe, are present everywhere, and remain stable. Some of these laws are as follows:
1. Law of universal gravitation
This law states that every object in the universe attracts each other in direct proportion to their combined mass and is inversely proportional to the distance between them.
2. Conservation of mass and energy
According to this law, mass, and energy can neither be created nor be destroyed. They can only be transferred from one form to another.
3. Law of inertia
This is Newton's first law of motion. It states that a body can resist the change in its motion unless the application of an external force. The property of resisting the change in motion is called inertia.
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dangers of fibre optics
A 11.3 v battery is connected to a 6.2 pf parallel-plate capacitor. what is the magnitude of the charge on each plate?
According to the capacitance, the charge on each plate is 70.06 pC.
We need to know about the capacitance of the air-filled capacitor to solve this problem. The capacitance of the air-filled capacitor depends on the charge and voltage. It can be written as
C = Q/V
where C is capacitance, Q is charge and V is voltage.
From the question above, we know that
C = 6.2 pF = 6.2 x 10¯¹² F
V = 11.3 V
By substituting the given parameters, we can calculate the charge on each plate
C = Q/V
6.2 x 10¯¹² = Q / 11.3
Q = 6.2 x 10¯¹² x 11.3
Q = 70.06 x 10¯¹² C
Q = 70.06 pC
Hence, the charge on each plate is 70.06 pC.
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The standard deviation of a sample was reported to be 30. the report indicated that deviation squared ( ) is equal to 7200. what has been the sample size?
The sample size of the standard deviation of a sample that was reported to be 30 is calculated as 8.
What is Sample size determination?The process of deciding how many observations or replicates to include in a statistical sample is known as sample size determination.
Any empirical study with the aim of drawing conclusions about a population from a sample must take into account the sample size as a crucial component.
CalculationStandard deviation = square root of ∑(x-average)^2 / N = 30
∑(x-average)^2 = 7200
Putting the values in standard deviation formula where N = sample size
30 = sqrt of ∑(x-average)^2 / N
Then squaring off on both sides,
900 = 7200/N
⇒N = 8
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Is the average speed of the blood 0.90 m/s , greater than 0.90 m/s , or less than 0.90 m/s ?
The average speed of blood is less than 0.90 m/s.
What is the speed of blood?The blood flows in the body of a person at the speed of less than 0.90 m/s. In miles per hour, the value is 2 which means the blood flows at the rate of 2 miles per hour. We know that blood is very important for the survival of all humans. This blood is a source of transportation of oxygen and waste material in the body like carbondioxide gas. This speed of of less than 0.90 m/s is optimum for the exchange of gases between blood and cell.
So we can conclude that the average speed of blood is less than 0.90 m/s.
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Consider an incandescent lightbulb. If you wanted to turn a 10-w lightbulb into a 100-w lightbulb, how would you change the temperature of the filament inside the bulb?.
By using the blackbody radiation formula, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
We need to know about black body radiation to solve this problem. The energy radiated by a black body object is proportional to the area and the fourth power of temperature. It can be determined as
P = A . e . σ . T⁴
where P is power, A is surface area, e is emissivity, σ is Stefan Boltzmann's constant ( 5.67 x 10¯⁸ W/m²K⁴) and T is temperature.
From the question above, we know that
P1 = 10 watt
P2 = 100 watt
T1 = T1
By using the black body radiation formula, the ratio of temperature is
T1⁴ / T2⁴ = P1 / P2
Hence,
T1⁴ / T2⁴ = P1 / P2
T1⁴ / T2⁴ = 10 / 100
T1⁴ / T2⁴ = 1 / 10
T2⁴ = 10T1⁴
T2 = ⁴√(10T1⁴)
T2 = T1 x 10⁰'²⁵
Thus, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
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Which of the following is the greatest number of times your heart can beat in one minute?
Target Heart Rate
Resting Heart Rate
Maximum Heart Rate
Beat Pulse Measurement
Answer:
What Is Maximum Heart Rate? Your maximum heart rate is, on average, the highest your pulse can get. One way to get a rough estimate of your predicted maximum is to subtract your age from the number 220. For example, a 40-year-old's predicted maximum heart rate is about 180 beats per minute.
Explanation:
A graph of velocity vs. time of a ship coming into a harbor is shown.
How would you describe the acceleration of the ship based on the graph?
The ship is moving in the forward direction at a steady rate. Then it decelerates
in the forward direction, and then continues to slow down in the forward
direction, but with more deceleration.
The ship is moving in the forward direction at a steady rate. Then it decelerates
in the forward direction, and then continues to slow down in the forward
direction, but with less deceleration.
The ship is moving in the forward direction at a steady rate. Then it turns around
and starts decelerating, while traveling in the reverse direction. It then
accelerates, but slowly.
The ship is moving in the forward direction at a steady rate. Then it accelerates
in the forward direction and then decelerates.
The graph shows that the ship decelerates in the forward direction, and then continues to slow down in the forward direction, but with more deceleration.
What is deceleration?The term deceleration refers to a gradual reduction in the velocity of the object with time. We know that when an object is moving at a steady rate, the velocity of the object does not change and this can be seen as a flat portion in the velocity time graph.
Looking at the graph, we can see that we could tend to look at the acceleration of the ship based on the graph with the view that the ship is moving in the forward direction at a steady rate. Then it decelerates in the forward direction, and then continues to slow down in the forward direction, but with more deceleration.
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What device is used to create static electricity
Answer: An electrostatic generator, or electrostatic machine, is an electrical generator that produces static electricity, or electricity at high voltage and low continuous current.
Explanation:
Answer:
electrostatic generator
Explanation:
Manual electrostatic generators develop electrostatic charges of opposite signs rendered to two conductors, using only electric forces, and work by using moving plates, drums, or belts to carry electric charge to a high potential electrode.
A weight gain of 1.49 lb (0.68 kg) per month is expected from birth until which month?
A weight gain of 1.49 lb (0.68 kg) per month is expected from birth until 6 months
A newborn grows roughly one inch every month throughout the first six months. Between six months and a year, growth slows to around a half inch every month. A baby boy's average length at six months is around 26.5 inches (67.6 cm), whereas a baby girl's average length is approximately 25.75 inches (65.7 cm). Boys average 29.75 inches (75.7 cm) while girls average 29 inches at one year (74 cm). During the first six months, he grew quickly, gaining 1.49 pounds each month and one inch in length. The following are characteristics of the first 6 months.
a.) Upper limbs and head grow more quickly b.) Primitive reflexes are present, including a strong suck and gag reflex c.) Infant is an obligate nose breather d.) Posterior fontanel closes by 2-3 months
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How many photons at 660 nm must be absorbed to melt 5.0 x 10^2 g of ice?
The total photons at 660nm that are needed to be absorbed are 5.533 x 10²¹ in order to melt the ice.
What is the Planck's equation?Planck's equation is used to determine that the energy (E) of a photon is equal to hv = hc/λ, where this v is stated as the frequency of the electromagnetic radiation and λ as its wavelength.
Wavelength = 660nm = 6.60 x 10^-7 m
First, we find out the energy that is required to melt 5.0 x 10^2 grams of ice. This is given by:
Energy = mass multiplied by latent heat of fusion
Energy = 5.0 x 10^2g x 334 J/g
Energy = 167 x 10^3 J
So, we now have that to melt 5.0 x 10^2 g of ice, we need 334J of energy
Next, we can use Planck's equation which is:
Energy = (number of photons multiplied by Planck's constant x speed of light) / wavelength
167 x 10^3 J = [n * 6.64 x 10⁻³⁴ * 3 x 10⁸ ]/ 6.60 x 10^-7
n = 5.533 x 10²¹
5.533 x 10²¹ photons need to be absorbed by the ice in order to melt.
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Which of the following best describes what the Nervous System does?
a. It sends glucose throughout the body.
b. It sends signals and messages throughout the body.
c. It sends oxygen throughout the body.
d. It sends liquid urine throughout the body.
Answer: It sends signals and messages throughout the body.
Answer:
b.
Explanation:
if you read B. its explains it sends signals and messages throughout your body so thats uour nervous system.
your welcome
Can you please answer the question. Thank you!
From the Newton's first law, we can see that the impressed force is equation the rate at which the momentum changes.
F = m(v - u)/t
F = force applied
m = mass of the body
v = final velocity
u = initial velocity
t = time
1) Deceleration of the person wearing the seatbelt is; 0 - 20/ 0.1 = -200 m/s^2
2) Force exerted = 50 Kg * ( -200 m/s^2) = -10000 N
3) Deceleration of the person stopped by the dashboard = 0 - 20/ 0.01 = -2000 m/s^2
4) Force exerted by the dash board on the person = 50 Kg * (-2000 m/s^2) = -100000 N
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The sound intensity at a distance of 20 m from a noisy generator is measured to be 0.26 w/m2. what is the sound intensity at a distance of 27 m from the generator?
0.1111 W/m² is the sound intensity at a distance of 27 m from the generator.
The amount of energy travelling through a unit area in a unit of time perpendicular to the direction of the sound waves is known as the sound intensity. Sound intensity is inversely related to the square of the sound's distance when all other factors are held constant. This is,
I ∝ (1/r²)
I = k/r²
Since k can be the constant of proportionality. k = Ir²
We can write this relation as
I₁ × r₁² = I₂ × r₂²
I₁ = 0.25 W/m²
r₁ = 16 m
I₂ = ?
r₂ = 24 m
0.25 × 16² = I₂ × 24²
I₂ = (0.25 × 16²)/24²
I₂ = 0.1111 W/m²
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For each scenario below, identify the opposite reaction force. 1) A baseball bat hits a ball. 2) A bowling ball pushes up against the pins. 3) Air particles push outward against a balloon. 4) During an earthquake, tectonic plates move
The reaction forces are as follows:
the ball hitting the batthe pins pushing against the bowling ball the walls of the balloon pushing against the air particlesthe weight of the tectonic plates.What are reaction forces?Reaction forces are the force which act in an opposite direction to an applied force.
According to Newton's third law of motion, action and reaction are equal but oppositely-directed.
Considering the given forces, the reaction forces are as follows:
A baseball bat hits a ball = the reaction force is that of the ball hitting the bat
A bowling ball pushes up against the pins = the pins pushing against the bowling ball
Air particles push outward against a balloon = the walls of the balloon pushing against the air particles
During an earthquake, tectonic plates move = the weight of the tectonic plates.
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What do we mean when we say we assume divisibility in a linear programming solution?
The final solution sales will always be fractions. The final solution deals do not need to be integers.
Linear programming (LP) or Natural Optimization is the issue of maximizing or underestimating a straightforward work subject to linear restrictions.
What is Linear Programming?The problem of maximizing or minimizing a straight work subject to linear constraints is known as linear programming (LP) or direct optimization.Equities or imbalances could be the constraints. Among the advancement issues are profit and loss calculations.Linear programming problems are a type of optimization problem in which the feasible region is determined and the arrangement is optimized to have the highest or lowest esteem of the work.The various types of linear programming are as follows: To solve linear programming problems, the Simplex method is used.R is a programming language used to solve linear programming problems. To solve linear programming, a graphical method is used.To learn more about linear programming, visit;
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nalyze the scatterplot graph.
Which trend does the graph show?
As age increases, weight increases.
As weight decreases, age increases.
As age increases, weight remains the same.
As weight increases, age remains the same.
As we see in the scatterplot graph and the briefing given below the most appropriate option is A-As age increases, weight increases.
Briefing:If you follow the arrow's trajectory, your finger will move to the right, increasing age (on the horizontal axis).
Additionally, as your finger rises, the weight (on the vertical axis) does as well.
Age and weight increase in tandem since both processes are ongoing.
What do scatterplot graphs display?The association between two numerical variables measured for the same individuals is displayed in a scatterplot. One variable's values are displayed on the horizontal axis, and the other variable's values are displayed on the vertical axis. On the graph, each individual in the data is represented by a point.
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The complete question is-
Analyze the scatterplot graph.
Which trend does the graph show?
A-As age increases, weight increases.
B-As weight decreases, age increases.
C-As age increases, weight remains the same.
D-As weight increases, age remains the same.
