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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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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How adding tin to copper makes the bronze alloy harder?
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.
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 :/
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
How does sound energy travel?
By sound circles
By sound drums
By sound lines
By sound waves
Answer:
I think its By sound waves..
Match the term with its description.
Match Term Definition
Acid A) A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water
Alkaline B) An atom or molecule that has a positive or negative charge
pH C) A compound that increases hydrogen ions (H+) when it is dissolved in a solution
Ion D) A compound that increases the hydroxide ions (OH−) when it is dissolved in a solution
Answer:
An acid is a compound that increases hydrogen ions (H+) when it is dissolved in a solution.
The term alkaline is related to compound that increases the hydroxide ions (OH−) when it is dissolved in a solution.
pH refers to a value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water
An ion is an atom or molecule that has a positive or negative charge.
Explanation:
Answer:
Acid A) A compound that increases hydrogen ions (H+) when it is dissolved in a solution.
Alkaline B)A compound that increases the hydroxide ions (OH−) when it is dissolved in a solution.
pH C) value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water.
Ion D) n atom or molecule that has a positive or negative charge.
Explanation:
God, cure my stupidity.
How is radiant energy transformed into chemical energy?
Answer:
Photosynthesis is the transformation of radiant energy to chemical energy. Plants take in water, carbon dioxide, and sunlight and turn them into glucose and oxygen. Called photosynthesis, one of the results of this process is that carbon dioxide is removed from the air.
Explanation:
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:
Carbon atoms in diamond are arranged in connecting cubes. Carbon atoms in charcoal are arranged more randomly. Using the names of the structures a solid can have, describe the differences between these forms of carbon.
Answer: Charcoal is the charred product from pyrolyzing wood. Charcoal is a porous material that can burn or adsorb pollutants, carbon atoms in diamond are arranged in the same way something in the solid state of matter would be arranged- like building blocks. if the carbon atoms in charcoal are arranged more randomly but still close
together, thats similar to the way a liquid would look!
Answer:
The carbon atoms in diamond are arranged like building blocks in the solid state of matter, whereas the carbon atoms in charcoal are arranged more randomly but still close together.
how do i find the formal of newtons third law
Answer:
Newton's third law is: For every action, there is an equal and opposite reaction.
Explanation:
FA = −FB. if one object A exerts a force FA on a second object B, then B simultaneously exerts a force FB on A, and the two forces are equal in magnitude and opposite in direction
Which phrase gives two processes scientists think move the Earth's lithospheric plates?
pls answer correctly to earn Brainliest
science class btw
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
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
Which example illustrates the transfer of energy through RADIATION?
Group of answer choices
feeling warmth when you sit in a sunny place
feeling warm air while standing in front of the blower from a heating system
feeling warmth on the soles of your feet when you walk along a beach on a sunny day
feeling the warmth of the bricks around a fireplace by touching them with your hand
It should be noted that example that illustrates the transfer of energy through radiation is feeling warm air while standing in front of the blower from a heating system.
According to this question, we are to discuss about energy through radiation.
Energy is required in doing work, however energy through radiation comes when the source doesn't come in contact with the object
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MARK BRAINLIEST AND 14 POINTS
Answer:
She could prove that it is a combination of substances by looking for a change in color, or the formation of bubbles. She could also try to pull the combination apart by physical means alone.
Explanation:
Answer:
If it's a mixture she could pull it apart bit by bit, but she can't so it's chemical..
Explanation:
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
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
Which term is described as a shelf of undersea land reaching a depth of about 200 meters (656 feet) and extending out from the shoreline?
For substances are involved in both photosynthesis and cellular respiration. They are sugars, water, oxygen, and carbon dioxide. Describe what happens to these four substances during photosynthesis.
Write your response below
Answer:
Carbon dioxide and water enter the plant while sugars and oxygen are released into the atmosphere.
Explain the kinetic energy of the particles in each of the 3 main states of matter.
2) This is a regulation of the internal environment of an organism.
Please help I need an answer like RIGHT NOW!
Answer:
for what nothing is heree??????????? <3
Explanation:
How do sound waves move?
In a straight line
In small circles
Up and down
Towards the ground
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.
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
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
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