This runner completed a 100 meter race with a time of 13.75 seconds. what was her average speed

Answers

Answer 1

Answer:

Taking into account the definition of speed, you get that the average speed of the runner is 7.27 $(m)/(s)$ .

It is necessary to know that speed is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it.

In other words, speed can be defined as the amount of space traveled per unit of time with which a body moves and can be calculated using the expression:

$Speed= (distance traveled)/(time)$

In this case:

distance traveled= 100 meters
time= 13.75 seconds

Replacing these values in the speed definition:

$Speed= (100 m)/(13.75 s)$

Solving:

Speed= 7.27 $(m)/(s)$

In summary, the average speed of the runner is 7.27 $(m)/(s)$ .

Learn more about average speed:

Answer 2

Answer:

Answer: 7.27 m/s

Explanation: The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval.

Distance traveled= 100 m

Time taken = 13.75 s

Average speed= $\frac{\text {distance traveled}}{\text {Time taken}}$

Average speed= $(100m)/(13.75s)=7.27m/s$

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How would you describe the change in the arrangement of particles as heat energy and temperature increase?

Answers

The change in the arrangement of particles as heat energy and temperature increase because of the increase in the kinetic energy of the particles.

How kinetic energy calculated?

Kinetic energy of any atom is calculated as:

K.E. = 1/2(mv²), where

v = velocity and m = mass

So, when we apply heat energy or increase the temperature of any system then the energy of the constitute particles is also increases which results in the increase of the average kinetic energy of the particle. Due to this kinetic energy particle will move with high velocity and disturbs the arrangement of the system.

Hence, due to increase in average kinetic energy, arrangement of the particles changes.

To know more about kinetic energy, visit the below link:

brainly.com/question/8101588

Answer:

there is more energy added as heat rises

Explanation:

What does the atomic numbrr represent on the periodic table?

Answers

Answer:

Explanation:

The atomic number tell us the number of protons and neutrons in the nucleus of an atom. in other words ,each element has a unique number that identifies how many protons are in one atom of that element example, all hydrogen atoms, and only hydrogen atoms, contain one proton and have an atomic number of 1.

How does ur body maintain constant tempature on a hot day?

Answers

It knows that when water evaporates, it carries heat energy away with it.
So your body puts some water out on your skin, and hopes that it will
evaporate. We call that "perspiring" or "sweating".

Answer:

your skin opens up

Explanation:

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Write a balanced equation for double replacement of KOH+ZnCl2

Answers

Answer :

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In this, A and C are the cations and B and D are the anions.

When one mole of potassium hydroxide react with the one mole of zinc chloride to give one mole of zinc hydroxide and 2 moles of potassium chloride.

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True or false. The epicenter of the earthquakr is directly below the focus

Answers

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