if a rock is hurled straight up from the earth's surface. The potential energy grows as the kinetic energy drops.
What happens to the velocity and acceleration of a rock thrown upward?The stone is hurled upward, and as it ascends, its speed decreases. When its velocity eventually zeroes out, it will return to its starting place. No matter the magnitude or direction of the velocity, the acceleration on the stone remains constant.The magnitude of a thrown rock's acceleration and velocity are both zero when the rock reaches the exact top of its route.A projectile is an object that is launched or projected into the air and is only subject to the acceleration of gravity. Projectile and trajectory both refer to the same thing: an object. The G will always act downward whether you throw up or down.To learn more about energy refer to:
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What is ballistic stretching in your own words?.
By bouncing into (or out of) a stretched position while using the extended muscles as a spring to pull you out of the stretched position, you are stretching or "warming up."
For instance, repeatedly bouncing down to touch your toes. Stretching in this way is thought to be harmful and risky for injuries. In that it is movement-based, ballistic stretching is comparable to dynamic stretching. You strive to extend a bodily part's range of motion rather of extending it all the way to the limit.
Reaching over to touch your toes and bouncing to enhance range are two examples of ballistic stretching. Due to the risk of injury and lack of benefit compared to other, safer forms of stretching like PNF and dynamic stretches, this sort of stretching is rarely advised.
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A liquid having mall depth but large volume is force by an applied pressure p above it escape with velocity v through a small hole below the velocity v is given by:v=cpxdy where c,x and y are dimensionless constants, determine x and y
Answer:
im not to sure about it
maybe check online
What is the magnitude of 3i 4j?.
Magnitude of 3i + 4j is 5 unit.
A vector's length, or magnitude, is its most fundamental physical characteristic. As a symbol, ∥a∥ stands for the magnitude of the vector a.
Using the components and Pythagoras' theorem, you may determine the magnitude of force vectors. Imagine the x-coordinate of the force as the base of a triangle, the y-coordinate as the height of the triangle, and the total force as the hypotenuse.
To find the magnitude, we can use this following formula:
∥a∥ = √ ( a₁² + a₂² )
in this case, we are given that:
a₁ = 3
a₂ = 4
Hence, the magnitude is
∥a∥ = √ ( a₁² + a₂² )
∥a∥ = √ ( 3² + 4² )
∥a∥ = √25
∥a∥ = 5 unit
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What is gravity year 7?.
The force that draws things together is gravity. It is the force that attracts anything in the direction of the earth's center.
The mass of the items and the separation between them determine how strong gravity is. An object's gravitational pull is stronger the more mass it has.
The gravitational attraction between two items decreases with increasing distance. Because of this, an object drops to the ground when you drop it.
You are drawn into the middle of the planet by gravity. In addition, gravity plays a role in the development of galaxies as well as other huge formations in space, as well as maintaining planets as well as other heavenly bodies in orbit around the Sun.
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How do you solve force in Coulomb's law?.
What is work write its SI unit and formula and example?.
Work is a unit of energy that results from exerting a force on the body that causes it to move. The formula W = F s cosθ denotes work done, where F denotes force applied, s denotes displacement, and = Angle between force and displacement. Joule is the SI unit of work.
What is work?Work in physics is the energy transferred to or from an object by applying force along a displacement. In its most basic form, work equals the product of force strength and distance traveled for a constant force aligned with the direction of motion. Work is the transfer of energy caused by a force acting on an object as it moves. The work done by a force on an object is calculated as the product of the magnitude of the force multiplied by the magnitude of the displacement multiplied by the cosine of the angle between them.
Here,
Work is a type of energy that is produced when a force is applied to the body, causing it to move. Work done is denoted by the formula W = F s cosθ , where F denotes force applied, s denotes displacement, and = Angle between force and displacement. The SI unit of work is the joule.
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Why do we measure torque?.
Modern engines need to deliver improved mechanical performance, and torque measurement helps them do this by increasing their accuracy and speeding up its rotation speed for efficiency assessments, some examples are:
Optimize Fuel Efficiency (Marine Industry)Load ManagementHigh/Low Torque AlarmDiagnosticsPredictive MaintenanceAccuracy explanation: What is it?The degree to which a measured value resembles a reference or well-known value is referred to as accuracy. For instance, if you measure a substance's weight in the lab and come up with a reading of 3.2 kg when the true or actual weight was 10 kg, your reading is inaccurate. Your measurement in this instance is quite far from the value that is already known.
What level of measurement precision is there?The more traditional expression is "accuracy of measurement," which is defined as "... the degree to which the outcome of a measurement agrees with the true value" on an international scale.
How torque is useful?Depending on the engine speed, both engine power and torque are indicators. Effective and energy-saving driving is made possible by high torque. Fast acceleration and a high top speed are made possible by an engine with high power.
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On the fahrenheit scale, water boils at ________ degrees.
On the fahrenheit scale, water boils at 212 degrees.
Boiling water is a process that occurs when water reaches its boiling point. Water begins to boil at 212 degrees Fahrenheit (100° C). The boiling point of water is a physical property of water that determines its temperature at which it turns from a liquid into a vapor and begins to escape as vapor through evaporation.Fahrenheit temperature scale, scale based on 32° for the freezing point of water and 212° for the boiling point of water, the interval between the two being divided into 180 equal parts.Conversion of temperature from celcius to fahrenheit is done by given formula:
F = (9/5 × C) + 32.
where, C = temperature in celcius
F = temperature in fahrenheit
We know that water boils at 100° C. Putting this value in above equation, we get F = 212.
Thus, 212 degrees Fahrenheit is the boiling point of water. At this temperature, water will begin to boil and turn into steam.
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PLEASE HELP RN
A cannon is fired horizontally at 251 m/s off of a 91 meter tall, sheer vertical cliff. How many
seconds
will have elapsed before the cannonball strikes the ground?
When the cannonball finally touches the ground, it will have been 1.94 seconds.
How much time will the cannonball take to land?We may disregard the answer t = -0.249 seconds since what we're interested in is what happens after the cannon is fired (i.e., when time t > 0). As a result, the cannonball reaches height h = 0 m and hits the earth at time t = 6.474 seconds.
Calculation:From the aforementioned query, the following information was discovered:Initial speed (u) equals 251 m/s.
Cliff height (h) equals 91 meters.
(s) is the horizontal distance.
The time it takes the gun to reach the earth will then be determined. This is attainable as follows:Cliff height (h) equals 91 meters.
Gravitational acceleration (g) equals 9.8 m/s2.
Time (t) =?
h = ½gt²
91 = ½ × 9.8 × t²
91 = 4.9 × t²
Divide both side by 4.9
t² = 91/4.9
Do both sides' square roots.
t = √(91/4.9)
t = 1.94 s
Finally, as indicated below, we will calculate the cannon ball's horizontal travel distance:Initial velocity (u) = 251 m/s
Time (t) = 1.94 s
Horizontal distance (s) =?
s = ut
s = 251 × 1.94 s
s = 486.94m.
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It takes a train going 50 mph approximately ____ to stop safely.
a. 100 feet
b. ½ mile (9 football fields)
c. 1 ½ miles (26 football fields)
d. 5 miles (88 football fields)
It takes a train going 50 mph approximately 1 ½ miles (26 football fields) to stop safely.
The total stopping distance is the distance traveled by the vehicle from the moment the driver detects danger and steps on the brake until the vehicle comes to a stop.
The easiest way to calculate total stopping distance is to use the 3 second rule. When safe and legal, a U-turn allows a driver to turn a vehicle in a lane, side street, alley, or driveway. A 3-point turn is a safer way to change direction than a 2-point turn.
Stopping distance is the distance from when your body decides to stop a moving vehicle to when it comes to a complete stop.
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PLEASE HELPPPP!!!! I NEED THIS DONE IN UNDER 3 DAYS!
Answer:
Question 7 is "Weight force down is greater than the air drag"
Question 8 is "600 N"
Explanation:
Question 7: When looking at the forces acting on the skydiver it's important to look at what force is larger, in this case, it's the weight. If two forces are acting in opposite directions, then the body will move in the direction of the force that has a larger value, 735 N.
Question 8: When the question tells you that the forces should be balanced, it means that they should turn out to equal zero if you were to subtract the forces, or you can think of it as trying to get the side that has a smaller number to be equal to the number that is greater. Since the question specifically says the parachute will ADD drag to the equation, you solve this one by asking yourself "What number + 135 will equal 735?" This ends up being 600 N.
Hope this helps!
Calculate the speed of the car at each checkpoint by dividing the distance between each checkpoint, in meters, by the change in time. Record your answers in table e of your student guide.
Speed is calculated as distance times speed. You need to be aware of the units for distance and time in order to calculate the units for speed. 1, 09, 1, 95, 2, 37, and 2, 80 m/s.
What is change in distance divided by change in time?Distance travelled divided by time equals rate of position change, often known as speed. By multiplying the distance travelled by the pace, you can find the time. For instance, Cole would have driven for 5 hours if he drove his automobile at a speed of 45 km/h and covered 225 km.The rate at which velocity changes is referred to as acceleration. As a vector, velocity has both a magnitude (a numerical value) and a direction.Acceleration is calculated by dividing the velocity change by the time required for the change to take place. The clock's speed, or how quickly a repeated cycle may be completed, is the only measure of the passage of time.To learn more about distance refer to:
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How 1 kilogram is equal to 9. 8 N?.
The force needed to move an object has a high N value when its mass is large in kg, 1 kg weight in this case equals 9.81 N or 1 kg=9.8N.
We know that,
F =mg
F = 1kg ×9. 8 N
F = 9.8N
The kilogrammes, or simply kg, is a unit used to measure an object's mass in the international systems of units (SI unit). Newton, or simply N, is a unit used to measure force in the international systems of units (SI unit).
The kilogram and newton have a straight proportional connection.
Since When an object has a low mass in kg, it also has a low force in N needed to move it.
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PLEASE HELP RN
A ball is thrown horizontally at 7.7 m/s from the top of a hill 59.6 m high. How far from the
base of the cliff does the ball hit the ground?
The horizontal distance dx is calculated using the formula dx = vx * t, where vx is the ball's speed in meters per second and t is the duration of its flight.
How do you calculate the horizontal ball throw's speed?The horizontal velocity is calculated by dividing the horizontal displacement by time. In this case, Vx is equal to 4 meters per second.
How do I figure out the range?To get the range, locate the greatest observed value of the variable and deduct the least observed value (the minimum).
t_flight = t_fall
h = 0.5 * g * t^2
59.6m = 0.5 * 9.8 m/s^2 * t^2
t^2 = 59.6 m / 4.9 m/s^2
t^2 = 12.1632
t = 3.48s
Solving for the horizontal distance dx
dx = vx * t
dx = 7.7m/s * 3.48s
dx = 26.7m
The ball hit the ground at 26.7m from the base of the cliff.
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The series is shown in over 100 countries. About 300 million people watch it every day. This makes The Bold and the Beautiful the most watched television series in the world. The first episode was shown on March 23, 1987 on the CBS network. The series was created by the soap opera writer William J. Bell and his wife, Lee Phillip Bell. It is the only American soap opera to have its daily episodes translated into Spanish for the Hispanic viewers in the United States. The series is set in Los Angeles, California. It tells the story of the Forrester family, who owns a fashion empire called Forrester Creations. The major members of the family are Eric Forrester (played by John McCook), the president of Forrester Creations, his wife Stephanie (Susan Flannery), their eldest son Ridge (Ronn Moss) and Brooke Logan (Katherine Kelly Lang), who was married to both the father and the son. She owns most of Forrester Creations. This is because she created BeLieF, a formula which earned much money for the company. There used to be a second fashion company called Spectra Fashions. It was Forrester’s main competitor. The conflicts between the Forrester and the Spectra families was one of the major themes of the story.
More than a 100 nations broadcasted series. The Bold and the Beautiful teasers for the upcoming CBS soap opera hint at more conflict.
What does the earth's horizon look like?The line dividing the Earth's surface from the sky is known as the horizon. Earth-sky horizons and celestial horizons are the two basic categories of horizons. There are various sub-types of horizons for both Earth-sky and celestial horizons. Earth-sky horizons include the local horizon, regional horizon, and sea level horizon.
What is the horizon that is lit?The particle horizon, also known as the cosmological horizon, comoving horizon, or cosmic light horizon, is the furthest a particle's light may have travelled before reaching an observer during the early universe's history.
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Is mass a force in physics?.
Mass is not a force in physics. The amount of matter that makes up an object is expressed by its mass, which is expressed in kilogrammes.
Even though the terms force, mass, and acceleration are usually employed incorrectly. Force is a physical phenomenon that, when applied to an item, causes it to accelerate in the direction from which the force was applied. The amount of matter that makes up an object is expressed by its mass, which is expressed in kilogrammes.
Acceleration is the rate at which an object's velocity alters while moving in the same direction as the unbalanced force. When the forces are in balance, there is no net force and hence no movement. The Newton's second law, which also concerns how an object moves, connects these three ideas.
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what type of magnet is used for the coil in a relay?
A relay typically uses an electro magnet as the coil. When an electric current flows through the coil, it creates a magnetic field that can actuate the relay's internal mechanism to close or open a switch.
What is function of electromagnet inside a relay?An electromagnet is a type of magnet that creates a magnetic field using an electric current. The electromagnet performs multiple roles in a relay. The electromagnet's primary job is to activate the relay's internal mechanism, which makes it possible for the switch contacts to close or open in response to an electric current flowing through the coil.
The armature of the relay, which is in charge of closing or opening the switch contacts, can also be attracted to or repelled by the electromagnet. Additionally, it serves as a control input for the relay, which helps to regulate power signal. Galvanic isolation between the two circuits can be achieved by using the electromagnet to isolate or separate the control circuit from the load circuit.
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What is the speed of a 0. 25 kg ball if its kinetic energy is 15 J?.
The speed of a 0.25 ball is 2√30 m/s. The result is obtained by using the formula for kinetic energy.
What is kinetic energy?Kinetic energy is the energy of an object due to its motion. So, if an object is moving, it has kinetic energy.
The energy is equal to half mass of an object multiplied by the square of its velocity. The statement can be expressed as
KE = ½ mv²
Where
KE = kinetic energy (J)m = mass of object (kg)v = velocity of object (m/s)We have a ball with
Mass, m = 0.25 kgKinetic energy, KE = 15 J.Find the speed of the ball!
Using the formula for kinetic energy, the speed of the ball is
KE = ½ mv²
15 = ½ (0.25)v²
15 = 0.125v²
v² = 15/0.125
v² = 120
v = √(4×30)
v = 2√30 m/s
Hence, the speed of the ball is 2√30 m/s.
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What is 20 newton force?.
20 Newton force is the force which can cause 1 m/s² acceleration in a body of mass 20 kg.
By the second law of Newton, force is defined as the time rate of change of momentum in a body. In other words a force can accelerate a body having some mass.
F = (m₁v₁-m₂v₂)/Δt
Where F is the force, m₁ & v₁ are the initial mass and velocity of the object and m₂ & v₂ are the final mass and velocity of the object.
Or, F = mass × acceleration
The SI unit of force is kg-m/s²or Newton. We can say that a force of 20 Newton can produce an acceleration of 1 m/s² in a body of 20 kg. Or it can produce a 4 m/s² acceleration in a body of 5 kg mass.
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What are the two ways ATP is produced during respiration?.
Cellular respiration is like a battery charger if ATP is like a battery. Substrate-level phosphorylation and oxidative phosphorylation are the two mechanisms used by our cells to produce ATP.
Plants possess three. They generate ATP when photosynthesis is taking place by using solar energy. During aerobic cellular respiration, glucose and oxygen combine to create ATP, which the cell can utilise. As byproducts, carbon dioxide and water are produced. The general equation for aerobic cellular respiration is: ATP is produced when glucose and oxygen combine in cellular respiration.
Glyceraldehyde-3-phosphate 1,3 diphosphoglycerate results in the first generation of ATP. Second, when phosphoenolpyruvate breaks down into pyruvate, ATP is created. For each of the two 3-phosphate molecules, these processes happen twice. Thus, during glycolysis, a total of 4 ATPs are created.
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What best explains a parallel force?.
A parallel force is a force that acts in the same direction as the motion of an object. The best explanation for a parallel force would be Newton's laws of motion. According to Newton's first law, an object at rest will remain at rest, and an object in motion will continue in motion in a straight line at a constant speed unless acted upon by an unbalanced force.
Therefore, a parallel force, acting in the same direction as the motion of an object, will increase or decrease the speed of the object but not change its direction of motion.
Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. A parallel force will cause acceleration, that is a change in the velocity, of the thing. The greater the force, the greater the acceleration, and the smaller the force, the smaller the acceleration.
This means that if an object is already moving in a certain direction and a parallel force is applied, the object will accelerate in that direction.
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An SUV with a surface area of 27 square meters travels at 35 meters per second. What is the drag if the car has a drag coefficient of 0.6 and the air density is 1.3 kilograms per cubic meter?
12,899 N
33,538 N
9,951 N
25,799 N
The drag force on the SUV is 12,899.25 N.
option A is the correct answer.
What is the drag force of the SUV?The drag force if the car has a drag coefficient of 0.6 and the air density is 1.3 kilograms per cubic meter is calculated as;
F = ¹/₂ρv²CA
where;
ρ is density of airv is the velocityC is the drag coefficientA is the surface areaThe drag force on the SUV is calculated as follows;
F = ¹/₂ x ( 1.3 kg / m³) x ( 35 m/s )² x ( 0.6 ) x ( 27 )
F = 12,899.25 N
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pls help asap
Car 1 has a mass of 8.0 kg and is moving left at 3.75 m/s. Car 2 has a mass of 5.5 kg and is moving right at 2.00 m/s. They collide. Afterward, car 1 moves right at 1.00 m/s.
How fast is car 2 moving after the collision, and in what direction?
The speed of the car2 after the collision is 6 m/s . The direction is towards the right.
What is momentum?
We have to note that the momentum of the object would have to be the product of the mass and the velocity of the object. In the case of the cars that we have we have to recall that; Car 1 has a mass of 8.0 kg and is moving left at 3.75 m/s. Car 2 has a mass of 5.5 kg and is moving right at 2.00 m/s.
We already know that;
Momentum after collision = momentum before collision
(8 * 3.75) + (5.5 * 2) = (8 * 1) + (5.5 * v)
v = final speed of car 1
Then we have;
30 + 11 = 8 + 5.5v
v = 6 m/s
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How are torque the moment of inertia and Newton's second law for rotational motion related?.
Newton's second law for rotational motion tells us that angular acceleration is directly related to the net torque and inversely proportional to the moment of inertia.
Mathematically, it is given as, τ = I α
where, τ is torque, I is moment of inertia, α is angular acceleration
Moment of inertia is described as the resistance to the change in rotation. It is given by the formula, I = m r², where m is mass and r is radius
Torque is nothing but the force and lever arm that can cause an object's rotation. It is also called as moment of force. Its SI units are N.m.
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How does a falling object's surface area affect calculations of terminal velocity? (
O The greater the object's surface area, the greater the air density.
O Surface area does not affect an object's terminal velocity.
O The greater the object's surface area, the greater its terminal velocity.
O The greater the object's surface area, the more air resistance it encounters.
Answer:
The greater the object's surface area, the more air resistance it encounters.
Explanation:
Terminal velocity is the point at which the force of air resistance is equal to the force of gravity acting on an object. An object with a greater surface area will encounter more air resistance and therefore have a lower terminal velocity.
The greater the object's surface area, the more air resistance it encounters. Hence, its velocity decreases with increasing surface area.
What is velocity ?Velocity is a physical quantity that measure the distance covered by an object per unit time. Velocity is the rate of speed and it is a vector quantity. Velocity of an object is affected by its mass, physical state, surface area, temperature etc.
As the mass increases, the velocity of a a falling object will be greater because, the gravitational force towards the massive object is greater and it falls rapidly.
As the surface area of the object increases, the air resistance that it encounters also increases. This air resistance acts as an opposition and decreases its velocity.
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when boating on federally controlled waters in an 18-foot boat, what equipment are you legally required to have on board?
When boating on federally controlled waters in an 18-foot boat, you are legally required to have certain safety equipment on board.
This includes a life jacket or personal flotation device (PFD) for each person on board, a throwable flotation device such as a ring buoy or cushion, and a fire extinguisher.
Along with that, sound-producing devices such as a horn or whistle, navigation lights for use during night time and restricted visibility conditions, and a visual distress signal such as a flare or flag.
Additionally, boats with a motor must also have a backfire flame control device and a ventilation system if the boat is equipped with an enclosed engine compartment.
It is also strongly recommended to have a first aid kit, a marine radio, and a signaling device such as a mirror or flashlight on board.
It's important to check with local authorities as well as the boating laws of the state you are in as they may have additional rules. Failure to have the required equipment on board can result in fines and penalties.
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Of the five zones to consider when discussing human fitness which do you believe is the most important and why do you believe this
I believe the most important zone is cardiovascular, as it is essential for maintaining a healthy heart and lungs.
why human fitness important? Human fitness is important for several reasons. Firstly, it helps maintain good physical health. Regular physical activity helps to strengthen bones and muscles, reduce the risk of heart disease, maintain a healthy weight, and reduce the risk for other chronic diseases. Secondly, fitness can improve mental health. Exercise releases endorphins, which can reduce stress, improve mood, and increase self-confidence. Additionally, fitness can help improve cognitive functioning. Research has shown that physical activity can improve focus and concentration, and can lead to better academic performance. Lastly, regular physical activity can help improve sleep quality. Exercise can help people fall asleep faster and stay asleep longer, leading to increased energy and alertness during the day. In conclusion, human fitness is important for physical, mental, and cognitive health. Regular physical activity can lead to a healthier and happier lifestyle.To learn more about human fitness refer :
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What is the equation which relates torque to force and lever arm?.
The lever arm is defined as the perpendicular distance between the axis of rotation and the force's line of action. torque τ = r × F
What's the connection between torque and force?Torque is a form of force applied to an item that causes it to rotate around an axis. Force is an action that alters the motion of an item.
A three-newton force applied two metres from the fulcrum, for example, produces the same torque as a one-newton force applied six metres from the fulcrum.
Torque is used by levers to help humans lift or move items. Torque is defined as the product of a force and its distance from a fulcrum.
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What is the potential energy of an object that weighs 20 kg and is 8 m from the ground?.
Joules (1568) provide the potential energy.
Based on the force exerted on the two objects, the potential energy equation is determined. P.E. = mgh, where m is the mass in kilograms, g is the acceleration caused by gravity (9.8 m/s2 at the earth's surface), and h is the height in meters, is the formula for gravitational force.
As a result of an object's position in relation to a zero position, potential energy is, in essence, the energy that is contained in the object. An object has gravitational potential energy if it is positioned at a height above (or below) the zero height.
Here m=20 kg
height h=8m
g= 9.8
Potential energy (P.E) = mgh
Potential energy (P.E) = 20*8*9.8
Potential energy (P.E) = 1568 J
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What is the formula for the mean of the sampling distribution of p?.
The population proportion, sometimes referred to as sampling distribution mean of p is a statistic of central tendency that expresses the average value of a group of sample proportions.
The formula for the mean of the sampling distribution mean of p is given by:
μp = p
where "p" is the population proportion. This formula states that the mean of the sampling distribution of p is equal to the population proportion. This is known as the "Law of Large Numbers" which states that as the sample size increases, the sample proportion will become closer to the population proportion.
It is important to note that this formula assumes that the population is large, and the sample is random and taken from the population, so that the sample proportion will serve well for an approximate value of p.
This formula is also based on the assumption that the sample is large enough that the Central Limit Theorem applies, which states that the sampling distribution is estimated to be normal despite population distribution shape.
In summary, the formula for the mean of the sampling distribution of p is μp = p. It states that the mean of the sampling distribution of p is equal to the population proportion. This formula is based on the assumptions that the population is large, the sample is random and large enough, and the Central Limit Theorem applies.
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