a driver of a car traveling at 15.0m/s applies the brakes, causing a uniform acceleration of -2.0m/s^2. how long does it take the car to accelerate to a final speed of 10.0m/s? how far has the car moved during the breaking period?
Explanation:
Initial speed of the driver, u = 15 m/s
Acceleration of the driver, [tex]a=-2\ m/s^2[/tex]
Final speed of the driver, v = 10 m/s
Let t is the time taken by the driver to accelerate to the final speed. Using first equation of kinematics as :
[tex]t=\dfrac{v-u}{a}[/tex]
[tex]t=\dfrac{10-15}{-2}[/tex]
t = 2.5 seconds
Let d is the distance the car moved during the breaking period. Using the third equation of kinematics as :
[tex]v^2-u^2=2ad[/tex]
[tex]d=\dfrac{v^2-u^2}{2a}[/tex]
[tex]d=\dfrac{(10)^2-(15)^2}{2\times (-2)}[/tex]
d = 31.25 meters
Hence, this is the required solution.
List 2 examples of poor scientific mythology found in the student lab report
To determine the density of an object, which set of instruments would be helpful?
triple beam balance and meterstick
The set of instruments that would be helpful to determine the density of an object are triple beams balance and meterstick
Triple beam balance refers to an instrument that can be used to measure the mass of different objects. It is called triple beam balance because it is made up of three beams.
Further ExplanationEach of the beams has different weights and their size matches the gradations of the notched scale present on each of the beam. The size of the beams varies, the middle beam has the largest size, the far beam has a medium size and the font beam is the smallest size.
The basic parts of a triple beam include:
Weight pan: the object to be weight is placed on the weight panBase: the base is beneath the weight pan and can be set up to properly fit on the workbenchBeam: the beams can be used to get the level of precisionRiders: they are on top of the beams and indicates the mass (g) of an objectPointers: the pointer marks the mass of the object on the scaleZero adjustment knob: the knob are used to set the beam balance to zero marks before useAlso, meterstick can be helpful to determine the density of an object
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To determine the density of an object, which set of instruments would be helpful? https://brainly.com/question/6286782To determine the density of an object, which set of instruments would be helpful? https://brainly.com/question/14239000KEYWORDS:
densityobjectmeterstickpointersknobtriple beams balanceWhat are the two factors that affect the frictional force between two surfaces?
Answer:
The amount of force and the angle between them.
Explanation:
A galaxy, such as the Milky Way Galaxy, is very small compared to
A.
the Solar System.
B.
the planet Jupiter.
C.
the Sun.
D.
the Universe.
Answer:
D. The universe
Explanation:
just got it correct
We may observe a sphere with a diameter of around 28 billion light years because the cosmos is enormous and has been expanding for about 13.8 billion years at a rate that is only a small fraction of the speed of light. Thus, option D is correct.
What Milky Galaxy, is very small compared to the Universe?Even just exploring our galaxy would take countless millennia, let alone the entire universe. The Hyperion Supercluster galaxy supercluster is another old formation.
The largest and most numerous galaxy is the universe. A galaxy is a massive cluster of gas, dust, billions of stars, and their solar systems that are all bound together by gravity.
Therefore, No, every solar system and galaxy can be found in the cosmos. The Milky Way Galaxy contains hundreds of billions of stars, including our Sun, while the universe itself is made up of billions of galaxies.
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If the mass of a material is 43 grams and the volume of the material is 14 cm^3, what would the density of the material be
WILL MARK BRAINLIEST AND THANK
Two locations have different water vapor content in their atmosphere. Which of these is likely to be recorded?
Difference in rates of runoff
Difference in air pressure
Same humidity levels
Same temperature
Difference in air pressure
Explanation:Humid air has lower air pressure because humid air contains lots of water. As more and more water enters the atmosphere it displaces other, heavier molecules. As a result air that is humid is much lighter. Since humid air is lighter, it has less weight to press down with so it has lower pressure.
Pressure increases with depth towards the center of earth. In which layer would you expect pressure to be the greatest.
If the mass of a material is 43 grams and the volume of the material is 14 cm^3, what would the density of the material be
PLEASE HELP ME WITH THIS.......
An object 15cm high is 30cm from a pinhole camera.if the height of the image formed at the back of the camera is 10cm,the image distance is?
TO solve this problem, we simply need to use ratio and proportion. From the statement problem we can say the ratio height : distance, so that: (let us say that X is the image distance)
15 cm : 30 cm = 10 cm : X
We know that the symbol : means division so:
15 cm / 30 cm = 10 cm / X
X = 10 cm * 30 cm / 15 cm
X = 20 cm
So the image distance is 20 cm
a boat is travelling at a velocity of 45m/s S. if the current of the river is moving at a velocity of 15m/s due east, what is the resultant velocity of the boat
vy = 10 m/s v2
y + v
2
x = v
2
ground
vx = 1.5 m/s (10)2 + (1.5)2 = v
2
ground
vground = 10.11 m/s
tan θ =
10
1.5
θ = 81.47
Answer:
Explanation:
31 m/s
23° north of east
Why would machine-operated stopwatches be used at sports events instead of hand-operated stopwatches?
Two examples of renewable energy resources
Cookware companies have been using a chemical called C-8, which helps to create a nonstick coating to pans. However, the Environmental Protection Agency (EPA) recently claimed that the use of C-8 in the manufacturing of nonstick cookware should be discontinued because studies show it causes cancer.
The one who might benefit financially, the most from the EPA's claim are cookware manufactures who make pans out of steel only.
What is chemical?A compound or element which reacts with the other element to form a product.
Chemicals are generally toxic because they harm our skin, when they come in contact with the body. When exposed to a toxic substance, gasoline can affect your health. Since, drinking gasoline can cause burns, vomiting, diarrhea and can cause death.
Cookware companies which have been using a chemical called C-8, that helps to create a nonstick coating to pans. Since, the Environmental Protection Agency (EPA) recently claimed that the use of C-8 in the manufacturing of nonstick cookware should be stopped. The reason for this discontinuation is that studies show it causes cancer.
There are also the companies who made cookware out of steels only. They are most benefited by this claim.
Thus, Steel cookware manufactures are benefited by EPA claim.
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Scientists develop knowledge by making about the natural world that may lead to a scientific question
Answer:
Scientists develop knowledge by making observations about the natural world that may lead to a scientific question
Explanation:
Science has been able to change history and develop some elemental theories that explain how everything works by following some steps. These steps are known as the "scientific method", which can be described as a systmatic way of learning about the world and answering questions. The most basic step that allow scientists to develop questions about something is the observation, by observing things doubts will emerge. This will lead to the next step that is asking questions. In this way your research problem will be more accurate and therefore easier to study. The following steps are: form an hypotesis, make a prediction based on the hypotesis and test the prediction.
Which of the following is a method of purifying water?
A. Fixation
B. Adding iodine
C. Freezing
D. Aeration
I’m between c & d
When the thermal energy of a material decreases, _____.
it melts
its temperature decreases
its temperature increases
the surrounding environment cools off
D. The surrounding environment cools off
CO2,NaCl,HCl these maybe classified as a) elements and compounds b) elements and molecules C) elements and pure substances D) compounds and pure substances
A (n) ______ is a material that transfers heat well
[BWS.02] Jim plans to plant coffee beans on the farm. Coffee needs warm, moist, and sunny climate. It always snows for four months, starting from November, in the location where Jim lives. The temperature is generally moderate from June to October. Based on scientific knowledge, which of these would be the best month to plant coffee?
Final answer:
The optimal month for Jim to plant coffee beans is June, before the snow season and during the warm, moist climate period. Climatic factors and temperature changes due to climate change should also be considered in planning for coffee production.
Explanation:
The best month for Jim to plant coffee beans on his farm, considering the climate requirements for coffee growth (warm, moist, and sunny conditions) and the pattern of snow from November, would be June. This period, just after the moderate temperatures from June to October, would offer the newly planted coffee trees the optimal window for warm temperatures before the cold, snowy conditions set in. It's important for Jim to avoid the snow season and capitalize on the warm and moist period for the plantation.
Moreover, climate change has been an increasing concern for coffee production globally. In regions like Colombia, rising temperatures and changes in precipitation have adversely affected coffee output, requiring the development of new agricultural methods. Jim should be aware of and prepared to respond to these challenges by considering shade-grown coffee and soil health management to potentially mitigate climate change impacts.
A miner of mass 90kg travels down a slide calculate the potential energy of the miner when he moves15m vertically downwards
The potential energy of the miner when he moves 15 meters vertically downward is 13,230 Joules.
How to solve for the potential energyTo calculate the potential energy of the miner as he moves 15 meters vertically downward, you can use the formula for gravitational potential energy:
Formula is given as m x g x h
Now, calculate the potential energy:
[tex]\[PE = 90 \, \text{kg} \cdot 9.8 \, \text{m/s²} \cdot 15 \, \text{m} = 13,230 \, \text{Joules}\][/tex]
The potential energy of the miner when he moves 15 meters vertically downward is 13,230 Joules.
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Please i really need to get this done today..
Describe the role of producers in a food web. Are producers the basis of all food webs? Justify your answer.
Which of the following is true?
A.
The Earth exerts a gravitational force on the Moon, but the Moon does not exert a gravitational force on the Earth.
B.
The Moon exerts a gravitational force on the Earth, but the Earth does not exert a gravitational force on the Moon.
C.
The Earth and Moon do not exert gravitational forces.
D.
The Earth and Moon both exert a gravitational force on each other.
Answer:D.
The Earth and Moon both exert a gravitational force on each other.
Explanation: 100% right
Please i really need help..
What energy transformation occurs when a battery-powered flashlight is switched on?
A.) chemical to light to electrical
B.) electrical to light to chemical
C.) chemical to electrical to light
D.) electrical to chemical to light
Answer:
its chemical to electrical to light, I took the test and it was right, hope this helps!
Explanation:
12080 gallons per month into liters per hour
How do consumers sometimes interact with producers?
Explanation:
The food chain consists of autotrophs (producers) and heterotrophs (consumers). All animals and plants fall into these categories.
The autotrophs are the first stage of the food chain. They are mostly plants. They use the radiation from the sun to fulfill their energy needs. In doing this process the autotrophs release oxygen. The process is known as photosynthesis. The plants take in carbon dioxide in the atmosphere released by heterotrophs during respiration and the plants in turn release carbon dioxide. Also, autotrophs provide a food source for the heterotrophs.
Every producer and consumer interact in some way, completing food chain.
Element of thunderstorms heavy rain
' should be presented—a succinct paragraph that encapsulates your main points and directly addresses the question asked. Secondly, an '
When crafting your answer, it is crucial to address all parts of the question and to support your points with evidence from provided readings or relevant knowledge. Aim for an in-depth exploration of the question rather than surface-level commentary. Avoid long rambling answers that stray from the main points. As per the instructions, a thorough response should contain a minimum of 3 to 4 well-developed paragraphs, with each paragraph consisting of at least 5 to 6 sentences. This format demonstrates a robust engagement with the question and reflects a high level of effort in constructing a considered response that is free of spelling and grammar errors.
Why do some environmental groups oppose tidal energy?
Answer:
Environmental groups oppose tidal energy because of the following potential negative consequences:
By changing the flow of tides with dams, there can be negative impact on the aquatic shoreline of the ecosystem;building of barrages may affect the sedimentation and turbidity of water within water basinsthere are animals what depend on the flow of tides for existence feeding and movement. The techology which captures the energy produced by the ties and converts them to electricity may affect the natural flow fo the tides thus impactin negatively on the aquatic and non-aquatic habitat.Cheers!
Which law represents a balanced chemical equation? Avogadro’s hypothesis, ideal gas law, law of conservation of mass, Newton’s first law of motion, Newton’s second law of motion
Answer:
Law of conservation of mass.
Every chemical equation adheres to the law of conservation of massIt state that "Matter cannot be created nor destroyed. Therefore there must be the same number of atoms of each element on each side of chemical equation.Sam and Ben stand on either side of box. They use equal force to push on the box. They observe the box does not move. How did they get this result? A) Balanced forces do not affect an object's motion. B) Unbalanced forces do not affect an object's motion. C) Balanced forces do affect an object's motion by changing its position. D) Unbalances forces do affect an object's motion by changing its position.