Jessica jogged 623 meters in 4 minutes, 22 seconds. What is her speed?

Group of answer choices

1.6 m/s

0.42 m/s

2.4 m/s

0.86 m/s

15.555 km/h was his average speed in units of km/h.

What is speed ?

The rate of a directionally changing object's location. The SI unit of speed is created by combining the fundamental units of length and time. Meters per second (m/s) is the unit of speed in the metric system.

Distance is an object's overall movement, regardless of direction. Distance refers to the length of an object's real route as a whole. The displacement of an object between two points is defined as the straight line distance (shortest distance), measured from one position to the other.

Using the conversion units given

1 mile = 1.609347 km

13.1 miles = 21.0824457 km

1 hour, 21 minutes and 19 seconds

1 + (21/60) + (19/60 × 60)

1.35527 hours

So he ran 21.0824457 km in 1.35527 hours

Speed = 21.0824457/1.35527

           = 15.555 km/h

Thus, 15.555 km/h was his average speed in units of km/h.

Learn more about speed from the given link.

https://brainly.com/question/27888149

#SPJ4

The weight of the box is 120N and work done is 432J.

We know that weight is just the force.

Weight  = F = mg

where, m = mass of the body = 12kg

            g = acceleration due to gravity = 10 m/s^2

Putting these values in above equation we get : F = 120 N

So, the weight of the box is 120N.

We know that work is the product of the component of the force in the direction of the displacement and the magnitude of this displacement.

Now Work done by an object is given by : W = F.d

where,

F = force acting

d = displacement = 3.6 m

Putting these values in above equation we get: W = 120 * 3.6 = 432J

To know more about work visit:

https://brainly.com/question/30127810

#SPJ4

A truck travels on a straight road at a velocity of 17 meters per second. Over 20 seconds, it accelerates uniformly to 27 meters per second. The acceleration of the truck was 0.5 m/s^2

The velocity of the truck after 20 seconds is 27 m/s and its initial velocity was 17 m/s, so the change in velocity is:

Δv = 27 m/s - 17 m/s = 10 m/s

The acceleration can be calculated as the change in velocity divided by the time it took to change, so:

a = Δv / t = 10 m/s / 20 s = 0.5 m/s^2

Acceleration is a measure of the rate of change of velocity over time. It is a vector quantity, meaning it has both magnitude and direction, and is defined as the derivative of velocity with respect to time. In other words, acceleration is the rate at which an object's velocity is changing. If an object is moving in a straight line and its velocity is increasing, then it is accelerating. If the velocity is decreasing, then the object is decelerating.

Acceleration has units of meters per second squared (m/s^2). Positive acceleration means an increase in velocity, while negative acceleration means a decrease in velocity. For example, when an object is accelerating upwards, its acceleration is positive, while when it is falling, its acceleration is negative.

To learn more about Acceleration  visit here:

brainly.com/question/3046924

#SPJ4

The relationship between wavelength and frequency of a wave is well established in physics and is described in the provided search results. According to the frequency of a wave multiplied by its wavelength gives the speed of the wave. In 2, the relationship is described using the equation frequency x wavelength = speed of light, where frequency (v) and wavelength (λ) are related to the speed of light (c).

The relationship between frequency and wavelength is also described in 3, where the wave speed is equal to the product of its frequency and wavelength. This is expressed as v = f * λ, where v is the wave speed, f is the frequency, and λ is the wavelength. In summary, the wavelength and frequency of a wave are directly proportional to each other, and the product of their values gives the speed of the wave.

Find more about  wavelength and frequency

brainly.com/question/15610117

#SPJ4

If the distance between the two particles is increased to 8.44 mm, the electrical potential energy will increase because work must be done to separate two particles that attract one another. Hence option(A) is correct.

The square of the distance between the charges has an inverse relationship with the potential energy. Additionally, it depends on whether the two charges have the same sign or the opposite sign; if they have the same sign, potential energy will decrease, but if they have the opposite sign, it will increase.

The energy that a thing retains due to its position in relation to other objects, internal tensions, electric charge, or other variables is known as potential energy.

Common examples of potential energy include the gravitational potential energy of an object, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field. The International System of Units uses the joule as its unit of energy, represented by the letter J. (SI).

It takes effort to separate two particles because the positive and negative charges are attracted to one another. Thus, there will be an increase in electrical potential energy.

your question is incomplete but most probably your full question was An electron is located 4.22 mm away from an isolated proton. If the distance between the two particles is increased to 8.44 mm,

what happens to the electrical potential energy of the electron and why?

A. The electrical potential energy will increase because work must be done to separate two particles that attract one another.

B. The electrical potential energy will remain the same because the electron and proton are both fundamental particles and their

charge cannot be changed.

C. The electrical potential energy will increase because larger energies are associated with greater distances.

D. The electrical potential energy will decrease because no work is necessary to increase the distance between particles that

demonstrate attraction.

Learn more about potential energy here:

brainly.com/question/24284560

#SPJ4

The cédula personal was optional during the Spanish period.

The cédula personal was a document used during the Spanish colonial period in the Philippines to keep track of the population and to collect taxes. It was a personal identification document that contained the holder's name, occupation, and tax status.

However, the requirement for a cédula personal was not strictly enforced during the Spanish period. While the Spanish government encouraged people to obtain one, it was not a mandatory requirement, and many people lived and worked without one.

This lack of strict enforcement was due to a number of factors, including limited resources for collecting taxes, the large size of the Philippines, and the limited number of government officials available to enforce the regulations.

To learn more about cedula, visit:

https://brainly.com/question/19254532#

#SPJ11

Complete Question:

Is the cedula personal was optional during the spanish period?

A total force of 8.0 units would be applied in the opposite direction of both ropes as a result.

An influence known as force can alter an object's motion, direction, shape, or resting state. It is one of physics' fundamental ideas. Contact forces and field forces are the two types of forces.

The normal force, air resistance, and friction are all examples of contact forces. Gravity, the electric force, and the magnetic force are all examples of field forces. The magnitude, direction, and duration of a force can all be measured.

A force's magnitude indicates its strength, and its direction indicates its direction of action. The amount of time a force is applied is its duration.

The knot must have zero net force in order to remain stationary. To put it another way, all of the forces must add up to zero. As a result, you will need to apply forces of 3.0 units in the first rope's opposite direction and 5.0 units in the second rope's opposite direction.

Learn more about force:

brainly.com/question/12785175

#SPJ4

The refractive index and the extinction coefficient of a material can be used to calculate its complex permittivity, which is a measure of the material's ability to store electric energy.

It is defined as the ratio of the electric flux density (D) to the electric field strength (E) in a vacuum and has units of farads per meter (F/m). In a material, the electric field is partially screened by the material's electrons, leading to a reduction in the effective electric field.  The complex permittivity is given by the following equation:

ε = ε' - jε'' = n^2 - jk,

where ε' is the real part of the permittivity, ε'' is the imaginary part of the permittivity, n is the refractive index, and k is the extinction coefficient.

So, to obtain the real and imaginary parts of the permittivity, one can simply use:

ε' = n^2

ε'' = k

where n and k are the known refractive index and extinction coefficient, respectively.

To know more about permittivity refer to:

brainly.com/question/30403318

#SPJ4

The runway must be 482.4 m long. The result is obtained by using the equations in uniformly accelerated motion.

The equations apply in uniformly accelerated straight motion in horizontal dimension are

v₁ = v₀ + at

v₁² = v₀² + 2ax

x = v₀t + ½ at²

Where

A 747 jet needs to attain a speed of 180 mph to takeoff. With

Find the length of the runway!

The length of the runway here is equal to the minimum distance the jet must travel before takeoff.

Let's convert the unit of speed!

v₁ = 180 mph

v₁ = 180 × 1609.34 × 1/3600 m/s

v₁ = 80.5 m/s

The acceleration is

v₁ = v₀ + at

80,5 = 0 + a(12)

80.5 = 12a

a ≈ 6.7 m/s²

The minimum distance will be

x = v₀t + ½ at²

x = 0 + ½ (6.7)(12)²

x = ½ (6.7)(12)²

x = 482.4 m

Hence, the length of the runway must be 482.4 m.

Learn more about uniformly accelerated straight motion here:

brainly.com/question/30397808

#SPJ4

The Kinetic energy of the nonrelativistic neutron which has a De Broglie wavelength of [tex]9.9 * 10^{-12}[/tex] m is [tex]8.375 * 10^{4}[/tex] Eu.

A moving item or particle might have power of a certain type called kinetic energy. An item gains kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force. A moving item or particle's mass and motion speed determine its kinetic energy.

The energy an object has as a result of motion is referred to as kinetic energy. It is defined as the effort needed to move a body of a particular mass from rest to the desired velocity. Unless its speed changes, the body retains the kinetic energy it gained during acceleration.

[tex]lambda D=9.9[10^{-12} ]\\h=6,626[10^{-34} ]\\m= 1.675[10^{-27} \\KE= \frac{h^{2} }{2m[lambda D^{2} } ]\\=13.4[10^{-15} ] joule\\KE = 8.375[10^{4} ]eu[/tex]

Learn more about kinetic energy here:

brainly.com/question/29552176

#SPJ4

Answer:

B. It is the flow of electrons that have a negative charge to protons that have a positive charge.

Explanation:

Electric charge is a fundamental property of matter that arises from the presence or absence of electrons in an object. Electrons have a negative charge, while protons have a positive charge. When an object has an excess or shortage of electrons, it creates an electric charge. This charge can be measured and is used to explain various electrical and electronic phenomena, including the flow of electric current, the behavior of electric circuits, and the interaction of charged objects with each other. The flow of electrons from one charged object to another is what creates an electric current, which is a flow of electric charge. Thus, the best definition of electric charge is the flow of electrons that have a negative charge to protons that have a positive charge.

The net torque on the pulley can be calculated as follows:

T = I * alpha

where

I = (1/2) * m * r^2 (moment of inertia of a cylinder)

m = 4.31 kg (mass of pulley)

r = 0.294 m (radius of pulley)

alpha (angular acceleration)

The gravitational force on the bucket creates a tension in the rope, which provides the torque on the pulley.

T = (m_bucket + m_pulley) * g * r

Equating the two expressions for T and solving for alpha, we get:

alpha = (m_bucket + m_pulley) * g * r / ((1/2) * m_pulley * r^2)

m_bucket = 6.27 kg

Substituting the values, we get:

alpha = (6.27 + 4.31) * 9.8 * 0.294 / ((1/2) * 4.31 * 0.294^2)

alpha = 11.58 rad/s^2

To know more about Angular Acceleration

https://brainly.com/question/21278452

#SPJ4

The given statement about “all rhythm originating from the sinus node have matching p waves that are upright in most leads” is true because that is the most basic criterion for sinus rhythms.

A sinus rhythm is present when the sinus node is acting as the primary pacemaker and directing impulse production (waveform 1 and waveform 2). Activation of the atrium occurs in this context from right to left, superior to inferior, and front to back.

Since the right atrium is activated before the left, the usual P wave in sinus rhythm can look a little notched when this activation pattern is present. Lead II always has a positive (upright) P wave, while lead aVR always has a negative one. Lead I typically displays a positive P wave, but lead III can be any of these or more. Lead aVL has an ambiguous polarity. There is typically a terminal negative component of the P wave in the precordial (chest) leads V1 and V2, which reflects the left atrium's posterior location (relative to the right atrium) and later activation. In the other precordial leads, the P wave is frequently positive.

To learn more about sinus rhythms, click here:

https://brainly.com/question/30391856

#SPJ4

The final velocity of the object is 29.75 m/s.

Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).

The acceleration of the object = 3.5 m/s²

The initial velocity of the object = 0 m/s.

Time interval = 8.5 second.

Hence, form basic kinematics, we can write the final velocity becomes = initial velocity  + acceleration × time interval

= 0 + 3.5 × 8.5 m/s

= 29.75 m/s

Hence,  the final velocity of the object is 29.75 m/s.

Learn more about acceleration here:

brainly.com/question/12550364

#SPJ1

Your question is incomplete but most probably the question was:

What is the final velocity of an object that accelerates from rest at 3.5m/s² for 8.5 s?

According to the second law of thermodynamics, the entropy of a system will always increase over time.

define thermodynamics ?

Thermodynamics is a branch of physics that deals with the relationships between heat, work, and energy in a system. It is concerned with understanding how energy is transformed and transferred between different forms, such as heat and mechanical energy. The laws of thermodynamics describe the basic principles that govern the behavior of energy and heat in a system and provide a basis for the understanding of thermodynamic processes.

According to the second law of thermodynamics, the entropy of a system will always increase over time.

To learn more about thermodynamics follow the given link: https://brainly.com/question/21858980

#SPJ4

A mile is 1.609 kilometers long. Both the mille and the kilometer are units of measurement. A mile is larger than a kilometer, nevertheless.

Approximately 125 calories are burned by walking for thirty min at a quick pace for a distance between 2.0 to 2.5 kilometres (520 kiloJoules). This may not appear to be much, but if if walked for a whole year, five days a week, you would have burned more than 32,000 calories, or more than 5 kg, of fat.

Conclusions Walking at any speed results in the loss of total body fat, however in overweight individuals the reduction is more pronounced, immediate, and initially larger with slow walking. a stronger, deeper exercise impulse.

To know more about speed visit :

https://brainly.com/question/28224010

#SPJ4

The two measurements that are necessary for calculating speed are distance and time. To find the average speed, you divide the distance by the time.

[tex]speed=\dfrac{distance}{time}[/tex]

To find the velocity of the second pool ball after the collision, we need to apply the law of conservation of momentum.

Let's call the velocity of the first ball before the collision as v1, and the velocity of the second ball after the collision as v2. The momentum of each ball before the collision is given by m1v1 and m2v2, respectively, where m1 and m2 are the masses of the balls.

Since the first ball stops after the collision, its velocity becomes 0, so we can write the equation as:

m1v1 + m2v2 = m1 * 0 + m2 * v2

Simplifying and substituting the given values, we get:

0.16 * 8.0 + 0.16 * v2 = 0.16 * 0 + 0.16 * v2

v2 = 8.0 m/s

So the velocity of the second ball after the collision is 8.0 m/s.

Learn more about Velocity here: https://brainly.com/question/18084516

#SPJ4

The electrons and protons have the same electric charge but of opposite nature.

What do you mean when you say "electric charge"?

Subatomic particles have a characteristic known as "electric charge" that makes them experience force while in an electric and magnetic field. Protons and electrons are the two main charge carriers for both positive and negative electric charges.

                               The quality of matter known as the electric charge is what causes it to create and feel the electric and magnetic effects.

Does the electric charge of protons and neutrons differ?

Neutrons lack charge, while protons and electrons have opposite charges. The size and direction of the charges on the proton and electron are the same.

                             In a neutral atom, protons and electrons exactly balance one another out in the same number.

Learn more about electric charge

brainly.com/question/9194793

#SPJ4

The resultant between two vectors will be given by the formula, R= √(2(F^2) + 2(F^2)cosθ)

In order to solve the equation for resultant between the two vectors F1 and F2 at an angle of θ, the following steps have to be followed:

The diagram for this problem is attached below

It is given in the problem that the magnitudes of forces F1 and F2 are equal,

F1= F2= F

In order to find the resultant force, the Parallelogram Law of Vector Addition comes into play.

This law states that if two vectors have the same initial point, and are dawn into a parallelogram, the summation of the two vectors will be the directed diagonal that starts at the initial point of the vectors.

Therefore, R= √(F1^2 + F2^2 + 2F1F2cosθ)

Now, since F1= F2= F,

R= √(F^2 + F^2 + 2(F^2)cosθ)

R= √(2(F^2) + 2(F^2)cosθ)

Learn more about Parallelogram Law of Vector Addition here brainly.com/question/26056717

#SPJ4

The required amount of power left for mechanical work by the DC motor is calculated to be 10300 w.

The current drawn by the motor = 50 A

Voltage of the DC motor = 230 v

Power dissipated as heat = 1200 w

The formula to calculate power dissipated by the motor;

P = V I

where, P is power

V is voltage

I is current

So, putting the known values into the above equation, we have,

P = V I = 230 × 50 = 11500 w

As some amount of power is dissipated as heat, the power left for mechanical work is;

⇒ 11500 - 1200 = 10300 w

Thus, the required amount of power is 10300 w.

To know more about power:

https://brainly.com/question/23712735

#SPJ4

The interaction between partially neutralized U-tapes may also be weaker compared to only one tape being neutralized, hence both tapes have reduced charge, which reduces the electrostatic between them.

To the correlation of the cooperation between two to some extent killed U-tapes and just a single U-tape being killed. Killing a U-tape includes lessening its charge by running a finger over piece of its length on the non-tacky side. At the point when one U-tape is somewhat killed, it debilitates the electrostatic power among it and another tape or a hand. In the event that both U-tapes are to some degree killed, the association between them is additionally liable to be more vulnerable contrasted with if by some stroke of good luck one tape was killed. This is on the grounds that decreasing the charge on the two tapes debilitates the electrostatic power between them. The power between tapes or a tape and a hand relies upon how much charge on each tape, with a more grounded charge bringing about a more grounded electrostatic power.

To learn more about, electrostatic force refer:

https://brainly.com/question/17009066

#SPJ4

Answer:

12 m/s

Explanation:

The final speed of an object that is subjected to uniform acceleration can be calculated using the equation:

v^2 = u^2 + 2as

where v is the final speed, u is the initial speed (in this case, 0 m/s since the object starts from rest), a is the acceleration (4.0 m/s^2 in this case), and s is the distance traveled (18.0 m in this case).

Plugging in the values, we have:

v^2 = 0 + 2 * 4.0 * 18.0

v^2 = 144

v = √(144)

v = 12 m/s

So the final speed of the object is 12 meters per second.

Answer: 1365 miles.

Explanation: Good evening.

There is no formula to determine how many miles a plane flies in a certain set of time. If it gives you the time, and distance, all you have to do is multiply. It tells you to find how many miles it traveled in total.

The quality at the final state is 2.96%.

Given,

m = 1 Kg p₂ = 30 bar

Water is cooled at a constant specific volume from p₁ to p₂

At first, water is at a critical point. The final quality will be determined if the water is cooled at a constant specific volume. The precise volume must be determined if the water expands at a constant temperature.

The critical pressure and critical temperature of the water are

[tex]p_c = 220.9 bar\\T_c = 647.13 K[/tex]

The specific volumes of the saturated liquid and saturated vapor corresponding to the saturation pressure of 30 bar are:

[tex]v_f = 1.2165 \times 13^{-3}\frac{m^3}{kg} \\v_g = 0.06668 \frac{m^3}{kg}[/tex]

Then the quality of state is:

[tex]v = v_f + x(v_g-v_f)\\\implies x = \frac{v - v_f}{v_g - v_f} \\\implies x = \frac{0.0031555-1.2165\times10^{-3}}{0.06668-1.2165\times10^{-3}}[/tex]

⇒ x = 0.0296

⇒ x = 2.96%

Therefore, the quality at the final state is 2.96%.

Learn more about constant-specific volume here: https://brainly.com/question/24015533

#SPJ4

If the cylinder seems to have a 64 cubic inch volume, its radius becomes R = 8/2, as well as 4.

The three-dimensional shape of a cylinder is made up of two equal circular bases connected by a curved surface. The correct cylinder is created when the vertices of the round bases cross each other. The axis, which represents the height of a cylinder, has been the line segment that connects the two centres.

A cylinder's volume (V) is equal to the sum of its base's area (B) and height (H) (H)

Given V = 64(π)

B = (π) * [diameter(D)/2]^2 * (H)

Given D = 2 * H

V = π * (D/2)^2 * H, then

V = π * (2 * H/2)^2 * H = π * H^3

π * H^3 = 64π

H^3 = 64

H = 4

D = 8

Radius(R) = D/2

R = 8/2 = 4

To know more about cylinder visit:

brainly.com/question/2898479

#SPJ4

(a) The impulse experienced by the ball is 4.68 kgm/s.

(b) The maximum force of the ball is 1,170 N.

The impulse of the tennis ball is calculated by applying the following formula as shown below.

J = Ft

where;

The impulse experienced by the ball is the area of the force time graph.

J = area of trapezium

J =  ¹/₂ x ( 2 + 6 ) x Fmax

J = 4 Fmax

Fmax = J / 4ms

J = ΔP

where;

ΔP = m ( v - u )

ΔP = 0.06 kg ( 39 m/s - - 39 m/s )

ΔP = 0.06 kg ( 39 m/s  +  39 m/s )

ΔP = 4.68 kgm.s

The maximum force of the ball is calculated as;

Fmax = ( 4.68 ) / ( 4 x 10⁻³ )

Fmax = 1170 N

Learn more about impulse here: https://brainly.com/question/25700778

#SPJ1

The complete question is below;

A 60 g tennis ball with an initial speed of 39 m/s

hits a wall and rebounds with the same speed. See attachment for graph. find the impulse experienced by the ball and the maximum force Fmax.

8.57cm is  the distance between thee point

Define distance .

The size or extent of the displacement between two points is referred to as distance. Keep in mind that the distance between two points and the distance traveled between them are not the same. The length of the entire journey taken to get from one point to another is the distance traveled.

Displacement is just the distance between the object's initial location and its final location. The amount of distance an object travels in a specific length of time is measured in terms of velocity.

d is [tex]\sqrt{x} (x2-x1)^2 + (y2-y1)^2[/tex]

x1 ,y1 is 5.0, 2.7

x2, y2 is -3.1, 5.5

d will be sqrt.(--3.1-5)^2 + (5.5-2.7)^2 i.e. 8.57cm

To learn more about displacement use link below:

https://brainly.com/question/14422259

#SPJ4

A loaded bus is more comfortable than an empty bus due to the lower center of gravity of the loaded bus, also a loaded bus has more inertia.

Comfort refers to the stability or the minimum rate of change of acceleration. A loaded bus has a lower center of gravity. So it has a minimum chance of overturning. On the other hand, an empty bus having a higher center of gravity is more susceptible to overturning.

A loaded bus has more inertia than the empty bus does. For the same force acting on both the buses, loaded bus will experience smaller accelerations. The loaded bus experiences almost zero sideways acceleration or vertical acceleration, and the forward & backward acceleration is also much smoother and better - controlled.

To know more about center of gravity, here

https://brainly.com/question/20662119

#SPJ4