a runner completes one complete lap around a 400m track, and finishes exactly where she started. what is her linear distance with respect to the starting position?

Answer:

The respiratory system is responsible for bringing the oxygen an organism will need to conduct cellular respiration. The respiratory system includes the lungs and other organs involved in breathing, such as:

When we inhale, oxygen from the air enters the lungs and diffuses into the bloodstream, where it is transported to the body's cells. Inside the cells, oxygen is used in the process of cellular respiration to produce energy in the form of ATP.

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The weight of the object from the information provided in the question is  1500 N.

We know that pressure = Force/area. We have the following information from the question;

Pressure =500 Nm-2

Area = 3 m2

Hence;

Force = Pressure × area

Force = 500 Nm-2 × 3 m2

Force = 1500 N

Hence, the weight of the object is 1500 N

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The force exerted by the rope. 265.2 N.

The force exerted by the rope is calculated by applying Newton's second law of motion.

This law states that the force applied to an object is proportional to the product of mass and acceleration of the object.

F = ma

where;

F = 78 kg  x  3.4 m/s²

F = 265.2 N

Thus, the force exerted by the rope on the barrel is a function of the mass and acceleration of the barrel.

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The complete question is below:

A 78.0 kg barrel is pulled up by a rope . The barrel accelerates at 3.4 m/s² . Find the force exerted by the rope.

Answer:

u = 80 cm and v = 80/3 cm

Explanation:

focal length f = +40/2 = 20 cm.

magnification m = v/u = 1/3, thus v = u/3

using 1/u+1/v=1/f gives 1/u=1/(u/3)=20  

So u = 80 cm and v = 80/3 cm

A discordant igneous intrusion cuts across bedding planes. Here is the detailed explanation of the given question:Explanation:The Discordant igneous intrusion is the formation of an igneous rock mass when magma is injected into a host rock and cools there.

This form of igneous intrusion does not conform to the stratification or layering of the existing rock mass because it cuts across it.Therefore, a discordant igneous intrusion cuts across bedding planes.Option (a) is correct. It is the only option that describes the features of discordant igneous intrusion. Hence, the correct answer is option (a).

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Answer:

40/3

M/s

11-19

These are the answers

Answer:

The electron gives up It's extra energy in a form called "photon light" and falls back down to its normal energy level

Explanation:

Answer:

C. Newton

Explanation:

hope this helped:)

loop currents flow in a counter-clockwise direction through each loop. This statement is true.

The Mesh Current Method is slightly modified by the Loop Current Method. In this list of actions, the changes are indicated. Identify the loops, meshes, and open windows of the circuit (other closed paths). Each mesh or loop should have a current variable assigned to it in a consistent manner (clockwise or counterclockwise).

In the mesh current approach, a network analysis technique, mesh (or loop) currents are randomly allocated, and Kirchhoff's voltage equation and Ohm's law are then systematically applied to solve for all unidentified currents and voltages.

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The student B with velocity of 300 mph will have greater net force exerted.

According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.

The motion of the object is always directed towards the net force.

F = ma

where;

F = m(v/t)

where;

The force applied to an object is directly proportional to the velocity of the object.

Thus, the student with greater velocity will have greater net force exerted.

The student B with velocity of 300 mph will have greater net force exerted.

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Answer:

resultant force is a overall force acting on a body

hope it helps.

The graph that corresponds to 0.1 s in one complete cycle is graph D.

option D is the correct answer.

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.

Also, the period of a wave is the amount of time it takes for a wave to complete one wave cycle or wavelength.

From the given parameter, the coil rotates 10 times in one second. The period of the coil is calculated as;

Period = 1 s / 10

Period = 0.1 s

From the graphs, the only option that has one complete cycle in one second is option D.

Check option D, half cycle is 0.05 s and one full cycle is 0.1 s.

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The question asks for research findings on the impact of family processes on divorced families.

Numerous research studies have been conducted to understand the impact of family processes on divorced families. Some of the research findings in this area include:

1. Increased conflict: Research indicates that divorced families often experience higher levels of conflict compared to intact families. The process of divorce itself, along with ongoing co-parenting challenges, can contribute to elevated conflict between parents. This conflict can have negative effects on children's well-being and adjustment.

2. Co-parenting quality: Research has shown that the quality of co-parenting relationships post-divorce significantly impacts children's outcomes. Positive co-parenting, characterized by effective communication, cooperation, and shared decision-making, is associated with better psychological and behavioral adjustment in children. In contrast, high levels of conflict and poor co-parenting quality can increase children's risk of experiencing negative outcomes.

3. Parent-child relationships: Research findings indicate that the quality of parent-child relationships can be affected by the divorce process. Divorce can disrupt parent-child dynamics, leading to changes in parenting styles, decreased involvement, or strained relationships. However, research also highlights that post-divorce interventions and support can help improve parent-child relationships and mitigate the negative effects of divorce on children.

In summary, research on the impact of family processes on divorced families suggests increased conflict, the importance of co-parenting quality, and the potential effects on parent-child relationships. These findings highlight the significance of fostering positive family processes and providing support to divorced families to promote better outcomes for children.

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Answer:

Explanation:

Carbon Dioxide has increased in the last 100 years because we’ve been told it has. We don’t know via our own senses of course, so we just have to accept that it has. I personally don’t know how CO2 levels are measured since different parts of the world have different levels of CO2. For instance, the Pacific Ocean which occupies 30% of the entire planet has no trees or green plants at all and therefore absorbs only small amounts of CO2.

The circumference in inches of the 25.0 pound solid steel cannon ball is 17.46 in

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

The volume of the ball can be obtained as follow:

Density = mass / volume

Volume = mass / density

Volume = 11.3398 / 7.7×10³

Volume = 0.00147 m³

Multiply by 61023.7 to express in in³

Volume = 0.00147 × 61023.7

Volume = 89.70 in³

We shall use the formula for calculating the the volume of a sphere to determine the radius of the ball. Details below:

V = 4/3πr³

89.70 = 4/3 × 3.14 × r³

89.70 = 4.187 × r³

Divide both sides by 4.187

r³ = 89.70 / 4.187

Take the cube root if both sides

r = ³√(89.70 / 4.187)

Radius = 2.78 in

C = 2πr

C = 2 × 3.14 × 2.78

Circumference of ball = 17.46 in

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Answer:

Explanation:

Chemical reaction is described as the process of rearrangement of the atoms to produce a new product which will have a different chemical identity.

For the observatory evidences to prove a chemical reaction has occurred we can look to the following:

Absolute result for the chemical change can be observed using the chemical analysis  

The energy of a photon of ultraviolet radiation is E = 2.91 * 10^-18 J

What is a photon?

A photon is a particle of light defined as a discrete bundle (or quantum) of electromagnetic energy.

The energy of a photon is obtained by multiplying Planck's constant by the frequency of electromagnetic radiation:

E = h * f

where,

h is Planck's constant

h= 6.63×10⁻³⁴ Js

f= 4.4×10^15 Hz

Substituting the values in the equation for Energy:

E = (6.63×10⁻³⁴) * ( 4.4×10^15)

E = 2.91 * 10^-18 J

Hence,

The energy of a photon of ultraviolet radiation is E = 2.91 * 10^-18 J

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Answer: the first choice!

Explanation: did it the question on edg!:)

Answer:

Friction is another force that energy gets "wasted" on in the dragging. Therefore, the machine gives you less mechanical advantage when too much friction is involved because it wastes energy. It also makes it less efficient!

Answer:

I think 75 m

Explanation:

tell if it was correct

The correct conductor ampacity for a 10-horsepower, 230-volt, single-phase motor is option c. 62.5 A.

The ampacity of a conductor is a measure of the maximum amount of electrical current that can flow through it safely. The ampacity required for a motor is based on the size of the motor and the voltage of the electrical system. There are standard methods for determining the minimum ampacity for a given motor and voltage, such as the National Electric Code (NEC) and the American National Standards Institute (ANSI). The NEC and ANSI both state that the minimum ampacity for a 10-horsepower, 230-volt, single-phase motor is 62.5 amperes. It's important to note that using a conductor with ampacity lower than the recommended one may cause the motor to overheat and fail, leading to damage or even fire hazard.

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Answer:

X-Rays

Explanation:

The acceleration of the baseball is 500 m/s².

A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull.

The mass of the baseball, m = 0.2 kg

The force acting on the baseball is 100 N.

By Newton's second law of motion,

F = ma

Substituting the values in the above equation,

100 N = 0.2 kg × a

a = 100 / 0.2

a = 500 m/s²

The total mass when the baseball and baseball bat are in contact is:

m = 0.2 + 0.94 = 1.14 kg

Then the acceleration will be:

F = ma

100 = 1.14 × a

a = 87.7 m/s²

The acceleration of the ball after the contact is 500 m/s².

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When salt is added, it makes it harder for the water molecules to escape from the pot and enter the gas phase, which happens when water boils, Giddings said. This gives salt water a higher boiling point, she said.

Answer:

Explanation:

Adding salt (independent variable) causes the boiling temperature of the water (dependent variable) to increase.

the height of the image of the insect will be the same as the height of the insect, but with a negative sign.

To determine the height of the image of the insect formed by a lens with a focal length of f = -125 mm, we need to apply the sign conventions used in lens imaging.

In the sign convention:

Distances measured from the lens towards the object are positive.

Distances measured from the lens towards the image are negative.

Focal length (f) is positive for a converging lens (convex) and negative for a diverging lens (concave).

Since the given focal length is f = -125 mm (negative value), we know that we are dealing with a diverging lens.

When an object is placed in front of a diverging lens, the resulting image is virtual, upright, and located on the same side as the object. The image formed by a diverging lens is always reduced in size compared to the object.

Since the image is virtual and upright, the height of the image will have the same magnitude as the height of the object, but it will be negative to indicate that it is located on the same side as the object.

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Explanation:

answer 689910

M x G x H

mass = 77

G= 9.8

Meter = 915 this is the height

77 x 9.8= 754.6

754.6 X 915 = 689910 J

Dean Potter is known for slacklining across a 915-metter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg then he has the potential energy of  691163.55 Joules

As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.

ME = KE + PE

As given in the problem Dean Potter is known for slacklining across a 915-meter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg,

m =77 kg

h = 915 m

the total potential energy of the dean potter can be calculated withe the help of the formula of the potential energy

PE = mgh

PE = 77*9.81*915

PE = 691163.55 Joules

Thus, he would have the potential energy of  691163.55 Joules

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The activity of 1.0 g of 226Ra is approximately 2.19 x \(10^4\) Bq.

Activity = decay constant x number of atoms

The decay constant of 226Ra is:

decay constant = ln(2) / half-life = ln(2) / (1600 years x 365.25 days/year x 24 hours/day x 3600 seconds/hour) ≈ 4.95 x \(10^{-12} s^{-1\)

The number of atoms in 1.0 g of 226Ra is:

number of atoms = mass / molar mass = 1.0 g / 226 g/mol = 4.42 x \(10^{-3\)mol

Multiplying the decay constant and the number of atoms, we get:

Activity = decay constant x number of atoms = (4.95 x \(10^{-12} s^{-1\)) x (4.42 x \(10^{-3\) mol) ≈ 2.19 x \(10^4\) Bq

The decay constant is a measure of the probability of a radioactive atom decaying per unit of time. It is a fundamental concept used to describe the behavior of radioactive decay and is denoted by the symbol λ (lambda). The decay constant is related to the half-life of a radioactive material, which is the time required for half of the material to decay.

The decay constant is determined by the type of radioactive decay, as each type of decay has a unique probability of occurring. For example, the decay constant for alpha decay is typically much higher than that of beta decay. The decay constant can be calculated using the activity of the radioactive material, which is the rate at which it emits radiation. The decay constant is a critical parameter in the prediction of the behavior of radioactive materials and their potential impact on the environment.

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The type of molecule that absorbs light energy and gets excited is a chromophore.

A chromophore is a specific part of a molecule that is responsible for absorbing light energy. It is typically a group of atoms with specific electronic properties that allow it to absorb photons of light at particular wavelengths. When a chromophore absorbs light, its electrons get excited to a higher energy level.

Chromophores can be found in various organic and inorganic molecules, such as pigments, dyes, and certain biomolecules. Examples of chromophores include conjugated systems of double bonds, aromatic rings, metal ions, and transition metal complexes. These molecules have the ability to absorb specific wavelengths of light, giving rise to their characteristic colors.

Upon absorbing light energy, the chromophore undergoes an electronic transition, where the energy is transferred to its electrons, causing them to move to higher energy levels. This excitation can lead to various outcomes depending on the molecule and its environment, such as fluorescence, phosphorescence, or chemical reactions.

In summary, chromophores are the specific molecular components that absorb light energy and become excited, playing a crucial role in processes like color perception, photosynthesis, and various optical and biochemical phenomena.

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To show that the potential difference (V) across the capacitor when it is charging is given by V = V₀ - V₀ * e^(-t/RC), we can use the principles of RC circuits.

In an RC circuit, a resistor (R) and a capacitor (C) are connected in series with a battery of electromotive force (e.m.f.) V₀. When the circuit is closed, the capacitor starts charging and the potential difference across the capacitor changes with time.

The behavior of the charging capacitor can be described by the equation:

Q = Q₀ * (1 - e^(-t/RC))

where Q is the charge on the capacitor at time t and Q₀ is the maximum charge the capacitor can hold.

The potential difference (V) across the capacitor is related to the charge by the equation:

V = Q / C

Substituting the expression for Q, we have:

V = (Q₀ / C) * (1 - e^(-t/RC))

Since the e.m.f. of the battery is V₀, we can write:

Q₀ / C = V₀

Substituting this into the equation, we get:

V = V₀ * (1 - e^(-t/RC))

This is the desired expression for the potential difference across the capacitor when it is charging.

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