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.
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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Can anyone help me with these science questions?
1. What is collision theory?
2. How does collision theory relate to factors that affect reaction rate?
3. Define reaction rate.
4. List factors that influence the rate of a chemical reaction.
5. Choose one of the factors you listed in your answer to question 2, and explain how it affects reaction rate.
Answer:
This is where google becomes your best friend but I got you
Explanation:
1. A theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another.
2. Collision theory says that chemical reactions occur by the collisions between atoms and molecules, so the more collisions the faster the rate of the chemical reactions.
3. The speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
4. There are four main factors that can affect the reaction rate of a chemical reaction:
Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...
Physical state of the reactants and surface area. ...
Temperature. ...
Presence of a catalyst.
Answer:
1. a theory that says a chemical reaction takes place when particles of the reactants collide with sufficient energy to initiate the reaction
2. Increasing the concentration of the reactants, the faster the particles will collide so the reaction rate will be faster
3. a measure of how fast a reaction takes place
4. Temperature, presence of a catalyst, reactant concentration, surface area
5.
Explanation:
not sure how to do number 5 sorru
How do sound waves move?
In a straight line
In small circles
Up and down
Towards the ground
A warm ocean transfers heat to the air above it. Which type of heat transfer is this
Answer:
Conduction
Explanation:
Because When air is in contact with the ocean it is at a different temperature than the seas surface
3. How do plants benefit from human respiration?
A. Plants need oxygen to survive
B. Plants need water to survive
C. Plants need carbon dioxide to survive
D. Plants need nitrogen to survive
⚠️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 ⚠️
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 (:
In your own words, describe the region around the atom
Answer:
Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus. Because opposite electric charges attract each other, negative electrons are attracted to the positive nucleus.
Explanation:
Answer:v yes byes vI vto
Explanation:
Rn hh b
Ok so whoever can answer all of these for me gets brainliest don't do a hypothesis though because I do that on my own just the independent and dependant variables pls
What effect does road salt have on cars?
Hypothesis:
Independent variable:
Dependent variable:
What effect does fertilizer have on rose bushes?
Hypothesis:
Independent variable:
Dependent variable:
What effect does salt levels have on blood pressure?
Hypothesis:
Independent variable:
Dependent variable:
Do light levels have an effect on bird migration?
Hypothesis:
Independent variable:
Dependent variable:
What effect does artificial sweetener have on blood sugar levels?
Hypothesis:
Independent variable:
Dependent variable:
Answer:
I = road salt
D= cars
I = fertilizers
D= rose bushes
I = salt levels
D = blood pressure
I = light levels
D= bird migration
I = artificial sweetners
D = blood pressure
Explanation:
independent variable is the one that is changed.
Dependent variable is the one that has to stay constant.
Using the word bank below label the wave.
A Trough. B Crest. C Amplitude. D Wavelength.
3). 4). 5). 6).
Answer: crest I don’t really know how to explain it but yea it’s crest
A compound is the chemical bonding of what
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.
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.
Answer:
Increasing the height will give the ball more energy and will increase the number of times it bounces.
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
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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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
How does sound energy travel?
By sound circles
By sound drums
By sound lines
By sound waves
Answer:
I think its By sound waves..
Help me plz <3 I need an answer right now!!!
Answer:
its b watch
Explanation:
They already know the distance if they know the time then they can find their speed. For example Mph is miles per HOUR therefore all they need is distance and time
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
Answer:
Sorry i cant see this question
Explanation:
Sorry
ok GUYS out there answer this
can u guys ask me a ques. that your to afraid to ask to a girl
Explanation:
Usually it's being afraid of getting rejected but your just afraid of being yourself
Answer:
im not afraid
Explanation:
God, cure my stupidity.
Would the car be able to travel all the way through the track of the roller coaster shown below? Why or Why not?
Yes, because there is enough Potential Energy at Point 1 to make it all the way through point 5.
Yes because there is enough Kinetic Energy at Point 1 to make it all the way through point 5.
No because there is not enough Potential Energy at Point 1 to make it all the way through point 5.
No because there is not enough Kinetic Energy at Point 1 to make it all the way through point 5.
Answer:
No because there is not enough Potential Energy at Point 1 to make it all the way through point 5.
Explanation:
Answer:
So first its common sense lol. So of course it would be enough Potential energy to go up excample like a bow-n-Arrow it goess up then down because of Gravity!!!!
Hope this hellped even though someone else said the same answer XD
Who do you think should be responsible for cleaning up all the space junk orbiting the earth? Please I really really needed help
Answer:
Every spacefaring country.
Explanation:
Space junk is no one countries' responsibility, but the responsibility of every spacefaring country. The problem of managing space debris is both an international challenge and an opportunity to preserve the space environment for future space exploration missions.
Hope this helps
Taken from google :/
I’ll give branliest to the best answer! Thanks!
Please help I need an answer like RIGHT NOW!
Answer:
for what nothing is heree??????????? <3
Explanation:
What is the funtion of the lungs in the respiratory system? (Use complete sentences.)
Answer:
The lungs' main role is to bring in air from the atmosphere and pass oxygen into the bloodstream. From there, it circulates to the rest of the body. Help is required from structures outside of the lungs in order to breath
Explanation:
Explanation: The lungs are the most important part of the respiratory system. They give air to serve the whole entire body. Lungs are one of the most vital organs of the body, since they help us breathe, and if we did not breathe, we would die.
Hope this helps you!
TIMED TEST!!
The product side of a chemical reaction is shown.
→ 7Ti2(SO4)3 What number is the coefficient
Help please
which pair of appliances transforms electrical energy into Mechanical energy
A) Lamp :Trampoline
B) Fan : Drill
C) Trampoline : Fan
D) Drill : Rubber Band
Answer:
A) Lamp:Trampoline
In your own words (Please don't search it up, and don't answer if you don't know.)
Please tell me the meaning of Outcome Variable and Test Variable
Thank you!
Answer: An outcome variable is a variable that is the final or missing variable in an experiment and a test variable is a variable that is being tested to find the final variable or missing variable (The outcome)
Explanation:
What does it mean for waves to be absorbed? Make sure to include energy in your explanation.
Answer:
The energy of a wave is transferred to the material it encounters. Ex.) When the ocean waves meet the shoreline, most of their energy is absorbed by the shore.
Explanation:
Ex.) When the ocean waves meet the shoreline, most of their energy is absorbed by the shore.
Wave absorption takes place when a wave transfers its energy to the atoms and molecules of the medium it comes in contact with.
What does it mean for a wave to be absorbed ?When a wave is absorbed, matter absorbs energy from the wave, lowering its amplitude. When a sound wave strikes foam padding, for example, the energy passes through the material and is sometimes converted into heat or other forms of energy.
The energy of a wave is transferred to the particles in the surface when it is absorbed by a surface. This usually causes the particles' internal energy to increase.
Some wavelengths or colors of light are absorbed when white light shines on an opaque object.
Thus, Wave absorption takes place when a wave transfers its energy to the atoms and molecules of the medium it comes in contact with.
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Which phrase gives two processes scientists think move the Earth's lithospheric plates?
pls answer correctly to earn Brainliest
science class btw
Pls help meh......Due at 3:00
What type of elements bond covalently?
What are two covalently bonded atoms called?
When drawing an electron dot structure, should you pair up as many electrons as you can around their original atom or should you leave them single?
How does this help you discover how many bonds they will form?
If a molecule has a triple bond, how many pairs of electrons does it share? How many total electrons is that?
What is a molecular compound?
What are properties of molecular compounds?
Why are molecular compounds poor electrical conductors?
How do bonded atoms become partially charged?
What is a nonpolar bond?
What is a polar bond?
Do you think water in the Dead Sea would conduct electricity? Why?
Answer: most molecular compounds poor conductors because they do not have charged particles to carry current.
Explanation:
Please help with !!!!!!!!