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

Taking into account the definition of speed, you get that the average speed of the runner is 7.27 .

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:

In this case:

• distance traveled= 100 meters
• time= 13.75 seconds

Replacing these values ​​in the speed definition:

Solving:

Speed= 7.27

In summary, the average speed of the runner is 7.27 .

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=

Average speed=

## Related Questions

The coefficients in the balanced chemical equation are used to determine mole ratios.Write the mole ratios found in the reaction "Making water
H2: _____0
H2;
H20
___02: _
H20

1 mole of HCl or NaOH gives you 1 mole of H2O , then the number of moles in H2O is: [ 1÷1×1 ] = 1 mole.

Explanation:

Out of sodium,rubidium,aluminum,and indium which is the most reactive metal

Explanation:

Among the metals Sodium, Rubidium, Aluminum, and Indium, Rubidium is the most reactive due to its position in the alkali metals group in the periodic table. The reactivity of metals increases as you go down in any group.

### Explanation:

The question asked was: 'Out of Sodium, Rubidium, Aluminum, and Indium, which is the most reactive metal?' In the periodic table of elements, reactivity of metals increases as we move down in any group. Sodium and Rubidium are alkali metals present in Group 1. Out of these two elements, Rubidium is further down in the group and is thus more reactive compared to Sodium. However, Aluminum and Indium belong to different groups and are relatively less reactive when compared to alkali metals.

Passivation, or the formation of nonreactive film of oxide on metals such as Aluminum, makes them less reactive compared to alkali metals, which readily react with water and oxygen. In conclusion, among Sodium, Rubidium, Aluminum, and Indium, Rubidium is the most reactive metal.

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How do Crocodiles See, Hear, and Smell?

They are reptiles.. and reptiles are born from good habitats.. and they have ears so they can smell.. they also have keen eyes so they could see good... and they have tiny noses so they could smell well.

How many grams of CO2 are in 2.1 mol of the compound?a. 21.0 g
b. 44.0 g
c. 66.0 g
d. 92.4 g

Molar mass CO₂ = 44.0 g/mol

1 mole ------- 44.0 g
2.1 mole ----- > ?

g = 44.0 * 2.1 / 1

g = 92.4 / 1

= 92.4 g

hope this helps!

Answer quickly plzzzz 100 pointsWhat are the two types of genetic molecules, contained in living things, that the bases formed from formamide make?

Nucleobases and Nitrogen

Hydrogen and Oxygen

DNA and ATGC

DNA and RNA

hydrogen  and oxygen

Explanation:

DNA AND ATGC

Explanation:

SORRY IF ITS WRONG

When and acid and base mix together it makes