Chemistry Middle School

An athlete runs at an average speed of 9.00 mph. If she wants to complete a distance of 42.19 km, she must jog for ____ x 10^2 min.

Fill in the blank.

Answers

Answer 1
The answer you are looking for is 37971
Answer 2

The athlete must jog for approximately 1.7479 × 10² minutes to complete a distance of 42.19 km at an average speed of 9.00 mph.

To find the time the athlete must jog, we'll first convert the distance from kilometers to miles, then use the formula:

Time (in hours) = Distance ÷ Speed

1 kilometer is approximately 0.621371 miles.

So, the distance in miles is:

42.19 km × 0.621371 miles/km ≈ 26.21875 miles

Now, we can find the time in hours:

Time (in hours) = 26.21875 miles ÷ 9.00 mph ≈ 2.9131944 hours

To convert hours to minutes, multiply by 60:

Time (in minutes) ≈ 2.9131944 hours × 60 min/hour ≈ 174.79167 minutes

Now, let's round this to two decimal places and express the result in scientific notation:

Time (in minutes) ≈ 174.79 minutes

To write it in the requested form (using scientific notation), we move the decimal point two places to the right:

Time (in minutes) ≈ 1.7479 × 10 minutes

So, the athlete must jog for approximately 1.7479 × 10² minutes to complete a distance of 42.19 km at an average speed of 9.00 mph.

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Related Questions

To investigate how mechanical energy affects the number of times a ball will bounce back, Maria dropped a ball from three different heights. Which of the following would be a reasonable conclusion from this experiment?

The height from which a ball is dropped does not affect the number of times it bounces.
Increasing the height will give the ball more energy and will increase the number of times it bounces.
Increasing the height will give the ball less energy and will decrease the number of times it bounces.
Decreasing the height will give the ball more energy and will increase the number of times it bounces.

Answers

Answer:

C. Increasing the height will give the ball more energy and will increase the number of times it bounces.

Explanation:

B. Increasing the height will give the ball more energy

What do cuticles do for land plants that were not necessary for ancestors that lived in the water?

Cuticles allow them to grow bigger and taller.
Cuticles help them transport water.
Cuticles help prevent water loss.
Cuticles allow the performance of photosynthesis.
HELP PLS AND THX

Answers

Answer:prevention of water loss would be unnecessary

Explanation:

edge 2021

Cuticles are protective lining in the epidermal layer of plants. Cuticles helps to reduce water loss and protect the plants from environmental stresses.

What is cuticles?

Cuticle is an organism's external layer or area that makes touch with the environment. The epidermis secretes the dead, noncellular cuticle in many invertebrate species. In humans, the cuticle is the epidermis, and this layer may include colours and chitin, similar to arthropods.

The cuticle is a protective coating that protects the epidermal cells of leaves and other organs while preventing water loss in some higher plants.

It is made up of cutin, a waxy, water-repellent compound related to suberin that is present in the corky tissue's cell walls. Hence, option c is correct.

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⚠️An irregular piece of iron has a mass of 78.7 grams. When placed in a graduated cylinder with 30 mL of water, the water rises to the 35 mL ​⚠️

Answers

Answer:

The density of the iron is: 15.74g/cm3

Explanation:

-To determine the density of something, you have to divide the mass and the vol.

-mass/volume = density or, m/v = d

-The mass of the iron is: 78.7 grams

-The volume of the iron is 5mL

In order to find the density, you have to divide:

m/v = d

78.7g ÷ 5mL = 15.74

Hope This Helps (:

The density of the iron is 15.74 g/cm3

A compound is the chemical bonding of what

Answers

A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic forces.

Answer:

A compound is a molecule made of atoms from different elements

Explanation:

All compounds are molecules, but not all molecules are compounds. Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.

HELP i will give crown and 15 points
Based on the chemical equation provided, use the drop-down menu to choose the coefficients that will balance the chemical equation.


(__)H2 + (__)O2 → (__)H2O
1 1 1
2 2 2
3 3 3 It's gives 123 for all of the choices

Answers

Answer:

Sorry i cant see this question

Explanation:

Sorry

It’s 2 1 2 as oxygen on RHS will have 2 oxygens which makes hydrogen 4 and since hydrogen is already 2 to make it 4, we just have to multiply by 2.

Choose the abiotic factors that characterize the tundra biome.

Warm, wet forests
Very little rainfall, extreme temperatures
Arctic foxes, snowy owls, wolves
Very low temperatures, very little precipitation

Answers

Tundra biomes have very low temperatures and little precipitation. :)

Describe the composition of each layer: Crust, mantle, outer core, and inner core all separate please it is worth 5pts x (this means 10 pts)

Subject: Earth Science

Answers

Answer:

crust-Silicate rocks

mantle- Silicate rocks rich in iron and magnesium

Ultramafic rocks

outer core- A layer of molten iron and nickel

inner core- solid iron and nickel

Explanation:

The answer: Crust silicate rocks

Two processes are described below: Process A: rapid moving water strikes a rock on the bottom of a stream and breaks it into pieces Process B: glaciers moving along a rocky surface form cracks in the rocks
which statement is true about the processes?

both represent physical weathering

both represent chemical weathering

Process a is physical weathering in process B is chemical weathering

process a is chemical weathering and process B is physical weathering

Answers

Answer:

both represent physical  weathering

Explanation:

Answer:

B. both represent physical weathering

Explanation:

I did the test

What is your carbon footprint?

A: the amount of carbon dioxide you use when recycling
B: the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
C: the amount of carbon dioxide and oxygen in the atmosphere at any given time
D: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels

Answers

Answer:

D

Explanation:

According to WHO, a carbon footprint is a measure of the impact your activities have on the amount of carbon dioxide (CO2) produced through the burning of fossil fuels and is expressed as a weight of CO2 emissions produced in tonnes.

The answer would be d.

How does sound energy travel?

By sound circles
By sound drums
By sound lines
By sound waves

Answers

Answer:

I think its By sound waves..

The correct answer is D) by sound waves.

Hope you have a blessed day!

God, cure my stupidity.

Answers

the answer is the third one

What are the main causes of convection currents in the asthenosphere?

pls answer to be marked brainliest pls! I have only 31 minutes left not on a test though but pls answer

science class grade 6

Answers

when warm air rises and cool air sinks
The heating of the Earth’s surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds.

The amount of matter in a given space or volume

Answers

This would be density.

In the given question, the amount of matter in a given space or volume is called density.

Matter is defined as any substance or anything that has mass, and which occupies space.

Density is a physical property of matter and can be defined as the mass of an object divided by its volume. Density has unit typically in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

It is an important property of matter because it helps to identify and distinguish different materials based on their mass and volume.

Therefore, density is the amount of matter in a particular region or volume.

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9. Mixing baking soda and vinegar leaves behind water and salt. This is an example of mixing ________ and __________. Is it a chemical or physical reaction?

Answers

Answer:

Mixing baking soda and vinegar is a chemical reaction. I’m not so sure about the fill in the blanks.

Explanation:

It is a chemical change due to the formation of gas and the change in temp.

It is a chemical reaction
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