A racehorse completes the Kentucky Derby, a distance of 1.25 miles, in
exactly 2.00 minutes. How fast is the horse in kilometers per hour?
A. 0.00647 kilometers per hour
B. 23.3 kilometers per hour
C. 0.0168 kilometers per hour
D. 60.3 kilometers per hour
Answers
Answer:
D. 60.3 kilometers per hour
Explanation:
Hello,
In this case, we first compute the miles in kilometres:
\(1.25miles*\frac{1.60934km}{1mile} =2.012km\)
Then the minutes in hours:
\(2.00min*\frac{1h}{60min}=0.033h\)
Finally, the velocity:
\(v=\frac{2.012km}{0.033h}\\ \\v=60.3km/h\)
Thus, answer is D. 60.3 kilometers per hour
Best regards.
Related Questions
If a substance has a density of 19 g/cm3, then what is the mass of 8 cm3 of this substance?
Answers
Calculate the ratio of H+ ions to OH– ions at a pH = 6. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide. Then divide the H+ concentration by the OH– concentration. Record this calculated ratio in Table A of your Student Guide.
What is the concentration of H+ ions at a pH = 6? mol/L
What is the concentration of OH– ions at a pH = 6? mol/L
What is the ratio of H+ ions to OH– ions at a pH = 6? :1
Answers
Answer:
1:1 ratio
Water (H2O) splits into Hydrogen Ions (H+) and Hydroxyl Ions (OH-). When there are equal parts of Hydrogen Ions (H+) and Hydroxyl Ions (OH-) leading to a 1:1 ratio, pH is neutral (7).Explanation:
The concentration of H + ions at pH 6. The concentration of H + can be deduced by the formula pH = - log H + ==> H + = 10 ^ (- pH) ...
Concentration of -OH at pH 6. The concentration of -OH can be calculated from pOH: pOH = 14 - pH = 14 - 6 = 8. ...
Calculation of the ratio H + / -OH:
When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.
Answers
Answer:
Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.
Table B: Calculation of Kinetic Energy (KE)
Table B: Calculation of Kinetic Energy (KE)
Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500
To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.
For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2
Perform similar calculations for the other velocities and record the results in Table B.
Answer:
Explanation:mass of the bottle in each case is M = 0.250 kg
now as per given speeds we can use the formula of kinetic energy to find it
1) when speed is 2 m/s
kinetic energy is given as
2) when speed is 3 m/s
kinetic energy is given as
3) when speed is 4 m/s
kinetic energy is given as
4) when speed is 5 m/s
kinetic energy is given as
5) when speed is 6 m/s
kinetic energy is given as
Make a model that explains how the iron pipes and fertilizer changed into rust.
In the Before space, draw the iron pipes and fertilizer before they changed into rust.
In the After space, draw the rust.
In the During the change space, draw or describe how the iron pipes and fertilizer changed into rust.
Label your model or create a key.
Answers
Answer:
is c before space I did it
Explanation:
Step by step
I NEED HELP ASP For the following compounds please determine the correct subscripts: OsaNb RhcCd The subscripts are a b c d
Answers
Answer:
a-1, b-2, c-1, d-1
Explanation:
Let us look at the first compound- OsN2
Since osmium is in +6 oxidation state and nitrogen is in -3 oxidation state. The valency of the species are 6 for osmium and 3 for nitrogen. They can now exchange valencies and we have Os3N6. Reducing to the lowest term we now have OsN2 as the formula of osmium nitride.
Similarly, rhodium is triply bonded to carbon to form the compound RhC in which the rhodium and carbon share six electrons. There is one sigma bond and two pi bonds between the atoms of rhodium and carbon.
Do magnets work underwater? How about in space? Explain your reasoning.
Answers
Answer:magnets work underwater the same as they do in air or in a vacuum.
Explanation : Water is almost completely non-magnetic, so magnets work underwater the same as they do in air or in a vacuum.
At the atomic level, are synthetic medicines different from natural medicines? Explain your answer.
Answers
Answer:
Although herbal medicines are less potent in comparison to synthetic drugs in some cases but still these are consider less toxic or having less side effect in contrast to synthetic drugs. The ultimate norm for any medicine (human made or natural) is their non-toxicity, effectiveness, specificity, stability and potency.
(It's on quizlet btw)
Answer:
Although herbal medicines are less potent in comparison to synthetic drugs in some cases but still these are consider less toxic or having less side effect in contrast to synthetic drugs. The ultimate norm for any medicine (human made or natural) is their non-toxicity, effectiveness, specificity, stability and potency.
Explanation:
The freezing point of pure water at sea level is 0°C. What is that in kelvins?
O A. 25 K
O B. 273 K
O C. -273 K
O D.OK
Answers
Answer:b
Explanation:
The Kelvin degree is the same size as the Celsius degree; hence the two reference temperatures for Celsius, the freezing point of water (0°C), and the boiling point of water (100°C), correspond to 273.15°K and 373.15°K, respectively.
Which of the following statements correctly explains why physical properties of a substance can be used to separate mixtures?
1. When substances are mixed together, they retain their physical properties.
2. When substances are mixed together, you can see each individual component
3. When substances are mixed together, the mixture assumes the physical properties of each individual substance.
4. Mixtures contain different substances with different properties and chemists can separate one item from the mixture by forcing it to undergo a chemical change.
Answers
Answer:
4) Mixtures contain different substances with different properties and chemists can separate one item from the mixture by forcing it to undergo a chemical change.
Explanation:
Mixtures contain different substances with different physical properties, such as boiling point, melting point, solubility, density, and so on. These properties can be used to separate the individual substances in the mixture through various techniques. For example, distillation is a separation technique that relies on differences in boiling points of the substances in a mixture. When a mixture is heated, the substance with the lower boiling point will vaporize first, and it can be collected and cooled to form a pure substance. Similarly, other techniques such as chromatography, filtration, and crystallization also rely on differences in physical properties to separate mixtures.
On the other hand, chemical changes involve the rearrangement of atoms within a substance, resulting in the formation of a new substance with different properties than the original. While chemical changes can be used to synthesize new substances, they are not typically used to separate mixtures.
A student placed fruit in a tightly sealed bag and found the mass of the fruit every week. She found the mass did not change over time even though the fruit was going through a chemical change. Is this an example of the Law of Conservation of Mass? Why or why not? Answer in sentences.
Answers
Answer:
mass never changes even if It changes chemical properties.
Answer:
Mass doesn't change at all :)
Explanation:
What is a neutralisation reaction?
Answers
Answer:
when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7
A tool might be made of an alloy because the alloy _____.
A. occurs naturally
B. resists rust
C. can bend easily
D. is softer
Answers
Your answer is:
B. Resists rust.
A tool might be made of an alloy because the alloy resists rust.
Why?
Iron is a great building material but steel (an alloy made by adding small amounts of non-metallic carbon to iron) is stronger, harder, and rustproof. Aluminum is a very light metal but it's also very soft in its pure form.
Alloy steels have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in the coinage.
____________________________________________________________
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Have a good day.which process causes earth to lose thermal energy to space?
A. Radiation
B. conduction
C. Eruption
D. convection
Answers
PLZZ HELP
Florida was experiencing one of the coldest winters ever recorded in that state. The temperature even dropped to a low of 32 degrees Fahrenheit in Miami. It snowed in some parts of Florida.
Is this describing weather or climate??
Answers
When a bumper car changes direction, does that mean there must be a net force acting on it? Explain, using the word “accelerates” in your answer.
Answers
Answer:
That's Newton’s third law of motion.
Explanation:
They are the Physics.
***URGENT PLEASE**** Select all of the bases listed *
Bleach
NaOH
H2SO4
HCl
Ammonia
HF
Answers
Answer:
NaOH (a strong base)
Ammonia ( weak base )
A motorcycle traveling at 19 m/s starts to slow down steadily, then it stops completely in 10 seconds. What is the motorcycle acceleration?
(meant to put this in physics sorry)
Answers
Answer:
-1,9m/\(s^{2}\)
Explanatio:
\(a=\frac{v-v_{0} }{t}\)
=\(\frac{0-19}{10}\)=-1,9m/\(s^{2}\)
Which of the following is an example of a compound?
A: water
B: iron
C: copper
D: Carbon
Answers
Water is a compound made up of two hydrogen atoms and one oxygen atom.
Which element would react faster with oxygen because of the properties it possesses?
Berryllium, Potassium, Neon, Barium
Answers
Answer:
Berryllium
Explanation:
its the most reactive (mark brainliest plz)
Berryllium would react faster with oxygen.
information regarding oxygen:
Beryllium refer to the silvery-white metal. It is in soft and contains the less density. Beryllium applied in alloys along with copper or nickel.Also, it should be reached quicker with the oxygen.Find out more information about the oxygen here:
https://brainly.com/question/1506082?referrer=searchResults
Methane is a gas at room temperature and pressure. Explain why this is the case.
Answers
Answer:
hope it helps ❤
Explanation:
Methane only has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.
The forces from below the surface that change the surface of the earth are
Erosion
Earthquakes
Volcanoes
Living things
Weathering
Faulting
Folding
Glaciers
Answers
Correct! The forces from below the surface that change the surface of the Earth include:
1. Erosion: The process of wearing away the Earth's surface by wind, water, ice, or other geological agents.2. Earthquakes: Sudden movements of the Earth's crust caused by the release of energy in the Earth's interior, resulting in shaking and sometimes surface displacement.3. Volcanoes: Openings in the Earth's crust through which molten rock, gases, and ash erupt onto the surface. Volcanic activity can lead to the formation of new landforms and alteration of existing ones.4. Weathering: The breakdown and alteration of rocks and minerals at or near the Earth's surface due to various physical, chemical, and biological processes.5. Faulting: The movement and displacement of rock layers along a fault line, typically caused by tectonic forces. This can result in the formation of new landforms or changes in the existing ones.6. Folding: The bending or warping of rock layers due to tectonic forces, resulting in the formation of folds and mountain ranges.7. Glaciers: Large masses of ice that slowly move over the Earth's surface, eroding the land and shaping the landscape through processes like plucking and abrasion.8. Living things: While not a direct force from below the surface, living organisms can play a role in shaping the Earth's surface through activities such as burrowing, root growth, and vegetation cover.These forces, both natural and influenced by living organisms, contribute to the continuous changes in the Earth's surface over time.
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Answer: Incorrect
Explanation: Glaciers don't form from forces from below
What is the charge on the Cr in Cr2O72-
Answers
Answer:
+6.
Explanation:
So, a chromium atom here has an oxidation number of +6.
What must be the same before and after a chemical reaction?
Answers
The number of molecules of each substances involved . In the chemical reaction
The number of atoms of each element involved in the same reaction
BRAINLIEST PLEASE HELP ME
Be sure to show your work and explain how you got your answer.
Answers
2000 - 600 = 1400
Answer:
what that person said
Explanation:
because
What kind of data does regional climate mainly collect and concentrate on?
Answers
Answer:
Climate, atmosphere, and land
Explanation:
Some of the data collected include air chemistry, temperature, precipitation, cloud cover, and wind speed. Instruments carried on balloons and wind profiling radar provide observations from the surface to more than 10 miles high.
PLS HELP DONT GOGGLE!!
Answers
The area where the land meets the sea is called the coastline. This area can have different physical features depending on its location. Some common features of coastlines are beaches, cliffs, bays, harbors, estuaries, and dunes. Beaches are made up of loose particles like sand and gravel that are deposited by the sea.
In some areas, the shoreline may consist of a wide, sandy beach, while in others it may be rocky and steep.
In general, the shoreline is where the land transitions to the sea, and it is often marked by the presence of waves, tides, and other oceanic phenomena.
what would happen to the identity of a fluorine atom (F) if it gained 4 protons?
Answers
Answer:
A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -1
How does Earth’s rotation affect the global pattern of prevailing winds? Explain your reasoning using evidence
Answers
Answer:the air deflects toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere, resulting in curved paths.
Explanation:
Where is the DNA stored in a cell?
Answers
Answer: nucleus
Explanation:
7: How many times can a volcano erupt?
Answers
Answer:
Some small volcanoes only erupt once in their lives,
while other volcanoes erupt multiple times. Kilaeua volcano in Hawaii, which has been erupting continuously since 1983, is the world's most active volcano. While some volcanoes erupt at regular intervals, there are always exceptions to the rule
Answer:
small volcano's only 1 time while big volcano's mutiple times
Explanation: