1. What is the difference between instantaneous speed and average speed?
2.What is the equation used for calculating average speed when an object is uniformly accelerating?

Answers

Answer 1
1. Instantaneous speed is the speed of an object at a specific point in time, whereas average speed is the total distance traveled divided by the total time taken. In other words, instantaneous speed is a single value that describes an object's speed at a particular moment, while average speed is a measure of how fast an object is moving over a period of time.

2. The equation used for calculating average speed when an object is uniformly accelerating is
v_avg = (v0 + v1) / 2

where v_avg is the average speed, v0 is the initial velocity, and v1 is the final velocity.

It must be noted that this equation is only accurate when the acceleration is uniform, and the time taken for the change of speed is small. When the acceleration is not constant or the time is long, the equation for average speed is different and more complicated.

Related Questions

A 1.3 kg ball of putty is released from rest and falls vertically 1.2 m until it strikes a hard floor, where it comes to rest in a 0.025s time interval. What is the magnitude of the average force exerted on the ball by the floor during the collision?

Answers

The magnitude of the average force exerted on the ball  is 4992 N.

What is force?

Force is the product of mass and acceleration. The S.I unit of force is newton(N)

To calculate the magnitude of the average force, we use the formula below.

Formula:

F = 2ms/t².................... Equation 1

Where:

F = Forcem = Masss = Distancet = Time

From the question,

Given:

m = 1.3 kgs = 1.2 mt = 0.025 s

Substitute these values into equation 1

F = 2×1.3×1.2/0.025²F = 4992 N

Hence, the average force is 4992 N.

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Use the information from the graph to answer the
question.
Velocity (m/s)
45
40
35
30
25
20
15
Velocity vs. Time
0 2
4
6 8
Time (s)
10
12
What is the acceleration of the object?
m/s²

Answers

The velocity after 8 seconds 15 m/s. the acceleration of the object m/s² 2.

What is velocity ?

Velocity is a vector quantity that expresses both the speed and direction of an object's motion. It can be described in terms of both magnitude and direction, and is measured in terms of meters per second (m/s). Velocity is an important concept in physics because it is used to describe the motion of objects. In addition, it is used to calculate the force of an object, the acceleration of an object, and the momentum of an object.

Velocity is an important concept in physics and engineering, as it is used to measure the rate at which objects move, as well as the rate of change of an object's motion. Velocity can also be used to calculate the work done on an object and to determine the direction of an object's motion.

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When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1600 kg automobile traveling at 42.8 m/s comes to a halt after its brakes are applied, how much can the temperature rise in each of the four 3.5 kg steel brake disks? Assume the disks are made of iron (cp = 448 J/kg·°C) and that all of the kinetic energy is distributed in equal parts to the internal energy of the brakes.

Answers

The temperature can rise 234° C in each of the four 3.5 kg steel brake disks.

What is law of conservation of energy?

Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another. An isolated system's total energy is constant regardless of the types of energy present.

According to law of conservation of energy:

1/2 × 1600 × 42.8² = 4 × 3.5 × 448 × Δt

Δt = (1600 × 42.8² )/( 2 ×  4 × 3.5 × 448)

Δt = 234° C.

Hence, the temperature can  rise 234° C in each of the steel brake disks.

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At an equilibrium position of a pendulum, the is at a maximum.

Answers

At an equilibrium position of a pendulum, the velocity is at a maximum.

The pendulum hangs straight down while it is at rest, not swinging. This position is called the equilibrium position. It is practical to consider this position to be the origin or reference position indicated in the definition of position.

The pendulum's lowest point is where the equilibrium point is located. It is called this because, there are no forces acting on it. This is the point at which the pendulum would be at a stable, motionless equilibrium.

It is also the time when the pendulum, after being let go from above, totally converts the gravitational potential energy it began with into kinetic energy. As such, this means that at this point the pendulum is at its maximum velocity.

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A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the minimum value for its centripetal acceleration at this point?.

Answers

The minimum value for the roller coaster car’s centripetal acceleration at the top of the loop is g downward.

When the roller coaster car is going at less than the minimum speed, it means there will be too much force, and the roller coaster car will fall from the track. At the minimum speed, the centripetal force at the top of the loop will be exactly equal to the force of gravity, mg, since no normal force will be needed.

What is normal force?

The normal force is the force which surfaces exert to prevent solid objects from passing through each other. Normal force is a contact force. If two surfaces are not in contact, they cannot exert a normal force on each other.

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A ball with a mass of 0.5 kilograms is lifted to a height of 2.0 meters and dropped. It bounces back to a height of 1.8 meters.

The energy of the ball has been reduced by
[ Select ]
(...)0.98 (...)8.82 (...)9.8 joules after bouncing back. This reduction happens because potential energy transforms to
[ Select ]
(...)kinetic (...)light (...)thermal energy.

Hint: Use PE = m × g × h where g = 9.8 m/s2.

Answers

The energy of the ball has been reduced by 0.98 joules (option A) after bouncing back because potential energy has been transformed into kinetic energy (option A).

What is potential and kinetic energy?

Potential energy is the energy possessed by an object because of its position while kinetic energy is the energy possessed by an object because of its motion.

According to this question, a ball with a mass of 0.5 kg is lifted to a height of 2.0 meters and dropped. It bounces back to a height of 1.8 meters. The difference in potential energy can be calculated as follows:

P.E (1) = 0.5 × 2 × 9.8 = 9.8J

P.E (2) = 0.5 × 1.8 × 9.8 = 8.82J

∆P.E= 9.8 - 8.82 = 0.98J

This reduction occured because the potential energy of the ball changes to kinetic energy (in motion).

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The tape in a videotape cassette has a total
length 213 m and can play for 2.4 h. As the
tape starts to play, the full reel has an outer
radius of 48 mm and an inner radius of 11 mm.
At some point during the play, both reels will
have the same angular speed.
What is this common angular speed?
Answer in units of rad/s.

Answers

Both reels will have the same angular speed of 0.0500 rad/sec.

What is angular speed?

angular speed is described as the rate at which an object changes it angles which we measure in radians in a given time

Given data:

The total length of videotape cassette is, L = 213 m.

The time interval for the play is, 2.4 = 2.4 x 3600

The outer radius of tape is, 48mm

The inner radius of tape is, 11mm

The videotape will undergo rotational motion and the value of angular velocity is given as,

w = v/ r  ... eqn (1)

Here, v is the linear speed of the cassette and r is the effective radius of the cassette, and its value is,

r =√ R²o + R²i/ 2

r = 49.24mm

And, the linear speed of the cassette is given as

v = L/ t

v = 213/ 8640

v = 0.02465 m/s

Substitute the values in equation (1) as

w = v/r

w =  0.02465/ 49.24

w = 0.0500 rad/sec.

Thus, we can conclude that at some point during the play, both reels will have the same angular speed of   0.0500 rad/sec.

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Lab-Kinematics in 1 Dimension: Determine Total Distance and Net Displacement from Velocity vs. Time Graphs

Answers

On a velocity-time graph, the object's displacement is indicated by the area under the line. The distance is the zone under a speed-time graph.

Displacement on a velocity-time graph: what does it mean?

Displacement is the outcome of velocity and time. The area of our graph is obtained by multiplying the velocity and time, which is virtually equivalent to multiplying two lengths. The solution to estimating displacements from a velocity-time graph.

What can we infer from a graph of velocity and time?

The amount of acceleration will be determined by the graph's slope. Example If a particle's acceleration is constant (k) and positive, its starting velocity is zero, and it grows linearly from there. The acceleration will be determined by the velocity-time graph's slope.

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Calculate the wavelength and energy of light that has a frequency of 1. 5 x 1015 hz.

Answers

Answer:

Explanation:

I will assmune that "frequency of 1. 5 x 1015 hz" is actually "frequency of 1. 5 x 10^15 hz"

The wavelength and frequency of light are related by the expression C = λ f  , where C is the speed of light  (3x10^8 m/s), λ is the wavelength (in m), and f is the frequency (in 1/sec or Hz).

   C = λ f  

   (3x10^8 m/s) = λ (1. 5 x 10^15 sec^-1)

   λ =     (3x10^8 m/s)/(1. 5 x 10^15 sec^-1)

   λ =    2.00x10^-7 m

 E=hf, where h is Plank's constant (6.62606957×10-34 J·s)

 E = (6.62606957×10-34 J·s)*(1.5x10^15s^-1)

 E = 9.94x10^-19 J

A skydiver is falling at a constant velocity of m/s. Gravity is producing a downward force of n. What is the force of drag acting on the skydiver?.

Answers

The force of drag acting on the skydiver is 795 N upwards.

When a parachutist jumps from a plane, only one force is acting on him, namely the force of gravity (the weight of the parachutist) so that the parachutist moves down. When jumping from a height when parachuting, the force of gravity will pull us down very quickly. Thus, we will freefall very quickly

Given in the questions: Constant velocity = 54.4 m/s

According to Newton's first law, when the net resultant force on an object is 0, the object is moving at a constant speed or is at rest and remains at rest. So, we know the resultant force is 0.

Now we use Newton's second law.

Resultant force = ma

Resultant force = Driving force (acting downwards) - Resistive force (acting upwards)

                       0 = mg (weight) - drag

                  drag = mg

                 drag = 795N upwards

Complete the questions:

A skydiver is falling at a constant velocity of 54.4 m/s. Gravity is producing a downward force of 795 N. What is the force of drag acting on the skydivers?

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e. Solve the following problem. Water has a specific heat of
4184 J/kg C. How much energy is needed to increase the
temperature of 3 kg of water 15 C ?

Answers

Energy needed to increase the temperature of 3 kg of water 15 C is 188280 J.

What is Energy ?In physics, energy refers to a quantitative property that is transferred to a body and can be perceived in the performance of work. Energy is Conserved - The law of conservation of energy states that energy can be transformed into form, but cannot be created or destroyed. Scientists explain energy as the ability to perform work. Modern civilization is possible because humans have learned  to convert energy from one form to another and  use it for work. Energy is the ability of the body to do work. I learned about different forms of energy which are Mechanical, Thermal, Chemical, Electrical, Optical, Acoustic, Nuclear, etc. They are interchangeable.However, energy cannot be created or destroyed.

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Find , the length of , the sum of and . Express in terms of , , an angle , using radian measure for known angles.

Answers

Length of :  |AB| = √(x2-x1)2 + (y2-y1)2

|AB| = √(x2-x1)2 + (y2-y1)2

|AB| = √(x2-x1)2 + (y2-y1)2

Sum of :  x1+x2+y1+y2

Angle :  θ = arctan2(y2-y1, x2-x1)

What is length?

Length is a measure of distance in one dimension, typically described as the longest side of an object, such as a line, a road, or a wall. The most common unit of measurement is a linear one, such feet, miles, centimetres, or millimetres. Length can also be measured in three-dimensional units, such as inches, feet, yards, and miles, as well as in other units such as cubits, rods, and fathoms. In terms of physics, length is the physical property of an object that describes its overall size and shape, or the distance between two points.

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Two pans of a balance are 79 cm apart.
The fulcrum of the balance has been shifted 0.99 cm away from the center by a dishonest shopkeeper.
By what percentage is the true weight of the goods being marked up by the shopkeeper?
Assume the balance has negligible mass.
Answer in units of %.

Answers

The true weight of the goods is being marked up by 0.0126%.

Solving for the  percentage is the true weight of the goods being marked up by the shopkeeper:

The percentage markup can be found using the formula:

distance moved  x 100%

original distance

In this case, the original distance is 79 cm and the distance moved is 0.99 cm, so the formula would be:

= 0.99 x 100%

    79

= 0.0126%

Hence, the true weight of the goods is being marked up by 0.0126%.

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What is MLA formatting used for?

Answers

MLA style is most commonly used to cite sources within the language arts, cultural studies, and other humanities disciplines.

MLA Style Citation Writing Format

The Modern Language Association or better known as the MLA style is a citation issued by MLA with a simple design. The aim is to make it easier for writers to write citations. Usually this style is used in the fields of Humanities and English.

the characteristics of MLA Styles' writing are:

The author's name is written in full with the last name written in front The year of publication is put at the end Quotations on the page simply by writing the last word and the page number of the quote On certain media, information on media type and format can be added, for example print or online On online sources, it is enough to display the month and year accessed without mentioning the online source.

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A train tart from ret ,it move through 1km in 100 with uniform acceleration. What will be it peed at the end of 100

Answers

The train velocity (speed) at the end of 100km will be 10m/s.

The train starts from rest and moves through a distance of 1 km in 100 km with a uniform acceleration. The formula for velocity at the end of a certain time period is calculated by the following formula:

where:

v = final velocity (speed)

u = initial velocity (0 m/s, since the train starts from rest)

a = acceleration (0.01 m/s^2)

t = time (100,000 seconds, since the train travels 1 km in 100 km)

v = u + at

v = 0 + (0.01 m/s²)(100,000 s)

v = 10 m/s

It means at and after 100km onward, the train will be moving at a speed of 10m/s. The train's velocity increases linearly with time due to the uniform acceleration, and after 100 km of travel, it reaches a final velocity of 10 m/s.

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An elevator weighing 230000 n is supported by a steel cable. What is the tension in the cable when the elevator accelerates down at a rate of 3. 7 m/s2 rounded to the nearest tenth?.

Answers

The required tension in the cable when the elevator accelerates down at a rate of 3. 7 m/s2 is  143163.26 N.

What is acceleration?

The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.

According to question:

We have,

Weight = 230000N, Mass of elevator = 23469.38 kg

a = 3.7 m/s^2

So, by free body concept

230000 - T = 23469.38 kg(3.7)

230000 - T = 86836.74

T = 143163.26 N

Thus, required tension in string is  143163.26 N.

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A pulse has a speed of 0,5cm.s-¹. How far does it travel in 2,5s?​

Answers

The pulse traveled 1.25 cm in 2.5s. with 0.5 cm/s

From the equation of motion in 2 dimensions d = v*t ...... ( i )

As

v= d/t so d=v*t

where the time taken is 2.5 s

the velocity of pulse is 0.5 cm/s

to find the distance covered in a given time which a velocity of 0.5 m/s

so from equation (i)

d= v*t..........................(from i)d = 0.5 * 2.5d= 1.25

So the distance it will be covered is 1.25 cm

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Your classmate hernando wants to draw lines that create a sense of energy and movement in his drawing. Which type of line would you recommend to him to best articulate this feeling?.

Answers

I would suggest him to use curved lines to articulate the energy and movement motion n his drawing

Arcs of lines may be referred to as curves segments, rays, or lines depending on how they are linked.

A typical illustration of a curve is the arc of a circle, often known as a circular arc. The term "great arc in a sphere" refers to an arc of a great circle or a great ellipse or a spheroid.

The numerous types of curves include simple curves, closed curves, simple closed curves, transcendental curves, and algebraic curves.

A curved line that encircles a central point is what is referred to be a circle. The line is continuously and uniformly curved. If a circle can be folded into two identical pieces, it is considered to be symmetrical.

Thus curved lines can be used to best articulate the feeling.

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Answer:

Curved

Explanation:

An object is moving at a speed of 920 yards every 3. 5 hours. Express this speed in miles per week. Round your answer to the nearest tenth.

Answers

The required speed of 920 yards every 3. 5 hours is terms of miles per week is 25 miles/week.

What is speed?

Speed is what it means. the speed at which an object's location changes in any direction. The distance travelled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.

According to question:

We have,

Speed = 920/3.5 = 262.85 yd/hour

We know that

1 yard/hour = 0.0954545 mile/week

So,

262.85 yd/hour = 25 miles/week

Thus, speed of 920 yards every 3. 5 hours is 25 miles/week.

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Which word best describes covalent bonding?

Answers

Answer: Option (a)

Solution: The covalent bond is best described as the bond where one atom shares its electron(s) with another neighboring atom to become stable. Here, the word “co” represents jointly and “valent” represents valency shared by them. Therefore, option (a) is the most appropriate choice amongst all the provided options.

A person pushes a lawnmower across 20 meters of grass. If the person pushes with 37 Newtons of force while pushing downward at an angle of 15 degrees below the horizontal, what is the amount of work the person does on the lawnmower?

Answers

Therefore, the amount of work done on the lawnmower is: W=Fdcosθ=(37 N)(20 m)cos15∘≈710J if is the amount of work the person.

What is the simple definition of work?

Work is force applied over distance. Examples of work include lifting an object against the Earth's gravitation, driving a car up a hill, and pulling down a captive helium balloon. Work is a mechanical manifestation of energy. The standard unit of work is the joule (J), equivalent to a newton - meter.

What is work and energy?

Work is defined as transferring energy into an object so that there is some displacement. Energy is defined as the ability to do work. Work done is always the same. Energy can be of different types such as kinetic and potential energy.

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The largest moon in the solar system is Ganymede, a moon of Jupiter. Ganymede orbits at a distance of 1.07×109m from the center of Jupiter with an orbital period of about 6.18×105s. Find the mass of Jupiter.

Answers

The moon of Jupiter, Ganymede is the largest moon in the solar system. The mass of Jupiter when the orbital period and the distance from the centre of the orbit are given is calculated to be 1.57 × 10²⁷ kg.

The time required to complete one revolution in an orbit around the planet is known as the Orbital Time period of motion. The orbital distance's cube is directly proportional to the square of the time period.

Given that,

Orbital distance R = 1.07 × 10⁹ m

Time period T = 6.18 × 10⁵ s

We know the formula of time period as,

T² = 4 π² R³/ G M

where, M is the mass of Jupiter

G is the gravitational constant

(6.18 × 10⁵)² = 4 π² (1.07 × 10⁹)³/(6.67 × 10⁻¹¹) M

Making M as subject, we have,

M = 4 π² (1.07 × 10⁹)³/[ (6.67 × 10⁻¹¹) (6.18 × 10⁵)²] = 1.57 × 10²⁷ kg

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How far would a car travel in 3 s if it's acceleration was 5 m/s²?
12.5 m
22.5 m
15.0 m
0.4 m
1.6 m

Answers

The distance a car will travel in 3 s if it's acceleration was 5 m/s² is 22.5m and is denoted as option B.

What is Acceleration?

This is defined as the rate at which velocity changes with time and is usually in terms of both speed and direction which makes it a vector quantity.

Acceleration = velocity / time

5 m/s² = v / 3s

v = 15m/s.

To calculate the distance we can use:

D = 1/2*a*t²

 =  1/2 × 5 × 3²

= 22.5m.

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25 bullets about Pierre&Marie Curie,or the creation of the polonium and or Radium

Answers

In 1898, the Curies' study of pitchblende led to the discovery of both the substances radium and polonium.

What was the purpose of pitchblende?

The original purpose of pitchblende extraction was to create coloring agents for the glassmaking industry. By analyzing pitchblende, the German geologist Klaproth discovered uranium in 1789. A.H. Becquerel made the discovery of radioactivity in 1896. A naturally occurring organic substance is pitchblende. It is the main source of uranium ore, which is present there as uranium oxide, or U3O8. Risks include those brought on by radiation and dust particles.

What about pitchblende was unexpected?

Even more astonishingly, Marie discovered that a uranium rock known as pitchblende included two potently radioactive new elements that she dubbed polonium and radium after her native Poland.

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How did the heavy elements originate and what did they create?

Answers

Heavy elements, such as gold, silver, and mercury, as well as the elements that make up the earth's core, such as iron and nickel, originated in the hearts of stars. They were created through the process of nuclear fusion, which occurs when the temperatures and pressures inside a star are high enough to overcome the electrostatic repulsion between the positively charged nuclei of atoms.

What are  heavy element?

When fusion occurs, the nuclei of the atoms merge, creating a new, heavier element. This process is called nucleosynthesis. The fusion of lighter elements, such as hydrogen and helium, produces heavier elements, such as carbon, oxygen, and neon.

Therefore, most heavy elements, such as gold and platinum, are created in supernovae, massive explosions that occur when the fuel in a star runs out, and the star collapses under its own gravity. The intense pressure and temperatures that are created during the collapse cause the nuclei of atoms to fuse together, creating elements with atomic numbers higher than iron.

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Can anyone help me answer this question?
______ is an instrument that measures small electric currents due to changing magnetic fields.
a) Ammeter
b) Galvanometer
c) Voltmeter
d) Dynanometer

Answers

B is correct -Galvanometer:)

Efficiency of a machine if energy input is 7.55 and energy output is 5.05

Answers

The efficiency of this machine is 66.67%.

What is efficiency?

Efficiency is a measure of how well a machine or system is able to convert input energy into useful output energy. It is a ratio of the output energy to the input energy, expressed as a percentage.

An efficient machine or system is one that is able to convert a large portion of the input energy into useful output energy, with minimal energy loss. Conversely, an inefficient machine or system is one that loses a significant portion of the input energy as waste heat, sound, or other forms of energy that are not useful to the desired output.

The efficiency of a machine can be calculated using the formula:

Efficiency = (Energy Output / Energy Input) x 100%

In this case, the energy input is 7.55 and the energy output is 5.05, so we can calculate the efficiency as follows:

Efficiency = (5.05 / 7.55) x 100% = 66.67%

Therefore, the efficiency of this machine is 66.67%.

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7. What is the power (in Watts) of the Pokemon Machamp that uses 237 N of force to move a huge boulder 83 m in 5s?

Answers

The power in watts of the Pokemon Machamp that uses 237N of force to move a huge boulder 83 m in 5s is 3,934.2Watts.

How to calculate power?

Power refers to the measure of the rate of doing work or transferring energy.

The quantity that has to do with the rate at which a certain amount of work is done is known as the power. The power of a substance can be calculated using the following formula;

P = Work done ÷ time

Since work = Force × distance

Power = (Force × distance)/time

Power = (237 × 83)/5

Power = 3,934.2Watts

Therefore, 3,934.2Watts is the power of the Pokémon machamp.

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Order the molecules from the strongest intermolecular force (top) to the weakest (bottom). Refer the table of electronegativities to help you.

Answers

The order of intermolecular forces among the given compounds will be as follows: H F > H Cl > H Br > H I

Electronegativity is defined as the property of the element to attract the shared pair of electrons towards itself.

Strongest intermolecular forces of attraction means that the electronegativity difference between the elements forming bond is more, more polar is the bond.

Electro negativities of the elements are:

Hydrogen: 2.1

Fluorine: 3.98

Chlorine: 3.16

Bromine: 2.96

Iodine: 2.66

Electro negativity difference in H F = 3.98 - 2.1 = 1.88

Electro negativity difference in H Cl = 3.16 - 2.1 = 1.06

Electro negativity difference in H Br = 2.96 - 2.1 = 0.86

Electro negativity difference in H I = 2.66 - 2.1 = 0.56

As, the electronegativity difference of H F is the highest, so it has the strongest intermolecular forces of attraction.

Thus, the order of intermolecular forces among the given compounds is H F > H Cl > H Br > H I.

The given question is incomplete. The complete question is attached in the below attachment.

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Question 3 of 10
Brittany learns that her primary care doctor will be switching to electronic
health records. Although she understands that this will improve her care, she
expresses concern to her doctor. What is likely one of her concerns?
A. The risk of her medical information being misused or shared.
B. Lack of personal access to her files.
C. Loss of revenue by her doctor's office.
D. Increased cost of a doctor visit.
SUBMIT

Answers

At the time of care, giving patients accurate, complete, and current information. facilitating quick access to patient records to improve coordination and effectiveness of service.

Do you believe switching from paper records to electronic records is beneficial to a health care practice why or why not?EHRs have the potential to be more effective than paper records because they permit centralised chart management and quicker access to patient data from any location with condition-specific inquiries.The term "Electronic Health Record" (EHR) refers to an electronic version of a patient's medical history that is kept on file by the healthcare provider over time. It may contain all of the essential administrative clinical data pertinent to that person's treatment by that provider, such as demographics, progress notes, issues, and medication information.contain information on a patient's medical history, diagnosis, prescriptions, treatment plans, dates of vaccinations, allergies, radiology images, and results of lab and test work.Providers should have access to evidence-based instruments that they may use to decide how to treat a patient.Streamline and automate provider workflow.

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