The position of an object at any time t is given by s(t)=3t4−40t3+126t2−9. i. Determine the velocity of the object at any time t. [5 marks] ii.Does the object ever stop changing? [5 marks] iii.When is the object moving to the right and when is the object moving to the left?
Answers
Answer:
1.) V = 12t^3 - 120t^2 + 252t
2.) No
3.) At positive V and negative V
Explanation: Given that the position of an object at any time t is s(t)=3t4−40t3+126t2−9.
1.) To determine the velocity V, we will differenciate the equation above with respect to t.
V = ds/dt
ds/dt = 12t^3 - 120t^2 + 252t
Therefore,
V = 12t^3 - 120t^2 + 252t
2.) The equation above depict an exponential equation which proves that the object never stops changing.
3.) The object moves to the right at positive velocity V and moves to the left at negative velocity V
i. The velocity of the object at any time is V = 12t^3 - 120t^2 + 252t
ii. The object is Not changing.
iii. At positive V and negative V.
Calculation of the velocity:Since the position of an object at any time t is
s(t)=3t4−40t3+126t2−9.
1.
Here the velocity is
V = ds/dt
ds/dt = 12t^3 - 120t^2 + 252t
SO,
V = 12t^3 - 120t^2 + 252t
2.) The equation above represents an exponential equation that proves that the object never stops changing.
3.) The object moves to the right at positive velocity V and moves to the left at negative velocity V
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At which point is the kinetic energy of the roller coaster at its maximum, and the potential energy at its minimum?
a. Point B
b. Point C
c. Point A
d. Point D
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Answer:c
Explanation:
Which has a higher density? Helium or air?
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Air
Explanation:In the case of your helium balloon, it most likely floated away before you could catch it because helium is much lighter (or less dense) than the air in our environment.
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A meteor falls toward Earth's surface. Given that the acceleration due to
gravity is 9.8 m/s^2, what is the meteor's potential energy if it has a mass of 10
kg at an altitude of 400 m?
O A. 408 J
O B. 7,840,000 J
O C. 2J
O D. 39,200 J
Answers
Answer:
39,200J
Explanation:
just took the test
The meteor's potential energy if it has a mass of 10kg at an altitude of 400 m will be 39200 J
What is potential energy ?Potential Energy that depend upon the relative position of various parts of system . It is an energy possessed by an object by virtue of its position or configuration.
mass(m) = 10kg
g (acceleration due to gravity) = 9.8m/s^2
altitude(height (h)) = 400m
Meteor's Potential energy = m * g * h
= 10 * 9.8 * 400 = 39200 J
correct option will be a) 39200 J
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Look in the comments. I d a r e y o u
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Answer:
Where is the comments??
Explanation:
Answer:
ok
Explanation:
Help due 2:45 est (SCIENCE)
Does the moon have gravity? How do you know? Support your answer using evidence.
Answers
Answer:
Gravity is experienced on the moon but since the moon is much smaller and has less mass than the Earth, the gravitational pull on the surface is lower compared to that on the surface of Earth.
Explanation:
Yes, the moon has gravity. This is evidenced by the fact that it not only attracts objects on its surface, but it also influences the tides of the Earth's oceans. The moon's gravitational pull creates the distinctive tidal bulges that cause the daily rise and fall of the ocean tides. This interaction between the moon's gravity and the Earth's oceans is evidence of the moon's gravitational field. Additionally, space missions to the moon have shown that objects and astronauts on the moon's surface are subject to its gravitational pull.
Why is it important for the path of a circuit to be circular?
Answers
Answer:
When the platform rotates, the rotating mass will travel in a circular path due to the force exerted on it by the string (by way of the tension in the spring). Since it is not possible to have an instantaneous readout of this tension force while the platform is rotating, an indirect measurement of this force will be made using the weight of the static mass as shown and explained below.
Which of the following forces has not changed Earth's surface?
folding
erosion
weathering
gravity
Answers
Answer:Gravity is the force among the options listed that has not directly changed Earth's surface.
Explanation:
Gravity is a fundamental force that acts on all objects with mass, including the Earth itself, but it does not cause changes or modifications to the Earth's surface features. Instead, gravity influences the movement of materials and the shape of the Earth's surface by exerting a pulling force on objects. On the other hand, folding, erosion, and weathering are all processes that directly contribute to shaping
Which of these statements best represents the law of conservation of energy?
A: Potential energy can be completely converted to kinetic energy.
B: The total energy in a system decreases over time.
C: Energy is being created in the universe every day
D: The energy created by machines can be lost.
Answers
what type of vehicle is this. and does it have more or less kinetic energy. pls answer the type of vehicle first pls ty.
Answers
Answer:
koenigsegg jesko
Explanation:
Under braking, the kinetic energy recovery system in the Regera can regenerate up to 150 kW of power to recharge the battery during operation.
hoped that helped! :)
Answer:
koenigsegg jesko
Explanation:
and more kanedic energy
Which is the definition of the equator?
A. The equator is half of a sphere, which is used to describe one half of the Earth.
B. The equator is the imaginary line that divides the Earth into two equal parts. It is also used as the basis for the word’s time zones.
The equator is the imaginary line that divides the Earth into two equal parts. It is also used as the basis for the word’s time zones.
C. The equator is an imaginary horizontal line drawn on the Earth equally between the North and South poles.
D. The equator is half of a circle used to describe the northern half of the Earth.
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Answer:
D. The equator is half of a circle used to describe the northern half of the Earth.
Explanation:
hope it helps
Answer: C
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Why is it important for a peer to review your writing, in addition to reviewing it yourself?You still have the ideas in your head, so you may not notice when they did not make it onto the page.
You will ignore all of the problems in your report because you won’t want to fix the problems.
All of the above
A peer has a better understanding of your topic than you do and can find mistakes.
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Answer:All of the above
Explanation:
Organic compounds are compounds containing
A. carbon and nitrogen
B. hydrogen and nitrogen
C. carbon and helium
D. carbon and hydrogen
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In this activity, you modeled the Sun–Earth–Moon system. If you removed one object from this system model, would the model still explain the changes to the Moon’s appearance?
Answers
The correct answer is NO because the moon appearance is relatively base on the positioning of Sun - Earth - Moon
What is the nature of Moon ?A moon is an opaque object. It does not give or illuminate light on its own, It reflects light from from the sun to the earth. The appearances of moon are;
waxing crescentwaxing gibbouswaning crescentwaning gibbousIn this activity, if you modeled the Sun–Earth–Moon system and you remove one object from this system model, would the model still explain the changes to the Moon’s appearance?
The answer is capital NO.
The reason is simply because the moon appearance is relatively base on the positioning of Sun - Earth - Moon relationship. That is, the moon appearances of waxing crescent, waxing gibbous, waning crescent and waning gibbous, all depend on the position of the Sun, Moon and the earth.
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It’s 11:53pm right now and I have just this assignment left to do for this class, I need this assignment done so I don’t fail this class, can I get some help please, I will literally give you brainliest if I get full and correct answers I just need to finish this now and I’m exhuasted, watching the video for it would just make me too tired to stay awke thank you
Answers
Answer:
Explanation:
1 matter
2 the chain / air pressure
3 gravity
4 in the cup
5 inertia
6 pushed or pulled
7 rest
8 motion
9 mass
10 reaction
11 b
12 a
13 grams
14 listen to the song
2. Gravity
3. Gravity
7. rest
8. motion
9. Mass times acceleration
11. A
12. B
13. Grams
14. Connected
That’s all I got sorry
Four rivers have the same volume of water flow over time but fall from different heights to power hydroelectric dams. Which dam would provide the most hydroelectric power?(1 point)
Responses
dam D: fall height of 100 feet
dam D: fall height of 100 feet
dam C: fall height of 135 feet
dam C: fall height of 135 feet
dam A: fall height of 175 feet
dam A: fall height of 175 feet
dam B: fall height of 75 feet
dam B: fall height of 75 feet
Answers
Answer:dam D: fall height of 100 feet
dam D: fall height of 100 feet
dam C: fall height of 135 feet
dam C: fall height of 135 feet
dam A: fall height of 175 feet
dam A: fall height of 175 feet
dam B: fall height of 75 feet
dam B: fall height of 75 feet
Explanation:
Four rivers have the same volume of water flow over time but fall from different heights to power hydroelectric dams. The dam would provide the most hydroelectric power that have maximum height that is 175 feet.
What is hydroelectric power?Using the rise or fall of water, hydroelectric power is generated. For instance, a large, swiftly running river has a lot of moving energy that generates enough water pressure to turn a turbine's blades and power an electric generator. The same water pressure can be produced by letting water fall from a tremendous height. To create water pressure, we store water and raise it to tremendous heights using dams. Dams are among the largest man-made constructions ever constructed.
Power = Water Flow Rate × Acceleration Due to Gravity × Reservoir Height × Coefficient of Efficiency
So if we increase the height than power increases. Maximum height have maximum power.
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Edward deposited $10,000 into a savings account 5 years ago. The simple interest rate is 3%. How much money did earn in interest?
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Answer:
Explanation:
Newton's law of gravitational force states that force of gravity is inversely proportional to the distance in between two bodies.
So As an object moves away from the center of the earth, the force of gravity DECREASES.
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Answer:
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What two gases in the atmosphere do animals and plants need to breathe and grow?
Answers
Answer: Explanation:
Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.
help me pls ill give brainliest thingyy
Answers
Which effect is created when two sound waves that are close in pitch
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O A. Echoes
O B. Loudness
C. Beats
O D. Intensity
Answers
Answer:
C. Beats
Explanation:
When waves are interfering with each other, the sound is louder in some places and softer in others. As a result, we hear pulses or beats in the sound.
Answer:
beats
Explanation:
got it right
how does a free fall drop ride work with newtons 3rd law?
Answers
Answer:
A falling object is in free fall when the only force acting on the force is gravity.
Explanation:
Because the only force acting on you is gravity, the scale no longer is pushing your cart up. Or in other words - your no longer pushing down onto the scale.
25 POINTS! Q1) A cinder block is pulled 0.50 meters to the right in 3 seconds. What is the block's average speed to the nearest hundredth of a meter per second (m/s)?
Q2) A skateboarder starts at the top of a halfpipe ramp, skates through the middle, and up the other side. Match the following to describe what is happening at each of the three points in the skater's movement.
Middle
End
Beginning
1.
Maximum kinetic energy
2.
Potential and kinetic energy is equal
3.
Maximum potential energy
Answers
The average speed of the blocks are 0.36 m/S.
Explanation:
Average speed is defined as the ratio of distance covered per unit time. So if it is said that blocks are pulled to 0.9 m in the right side. This means the blocks cover a distance of 0.9 m from the origin and that distance is covered in 2.5 s. Thus, the average speed can be calculated from the change in speed
with respect to time. As at time t = 0, the speed is
also zero, and at time t = 2.5 s, the speed will be
Speed =
0.9 = 0.36
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
1.maximum kinetic energy minimum GPE
2.GPE is equal to kinetic energy
3 this time there will be maximum GPE
What is an ecosystem? Group of answer choices An ecosystem is all different populations of animals in an area. An ecosystem is a community of plants and animals and their physical surroundings. An ecosystem is a single example of a particular species of plant or animal. An ecosystem is all the organisms of a particular kind of species and their surroundings.
Answers
Answer: An ecosystem is a community of plants and animals and their physical surroundings
Explanation: An ecosystem is a geographic area where plants, animals, and other organisms as well as weather and landscape work together to form a bubble of life. Ecosystems contain biotic and abiotic factors both. Biotic factors include plants, animals, and other organism
Answer: An ecosystem is a community of plants and animals and their physical surroundings.
Explanation: Ecosystem plays an essential role for the existence of living organisms in the planet Earth. A balanced ecosystem is attained as a result of various reasons it includes the live ratio of diverse varieties of organisms in a particular ecosystem, necessary physical, biological, and chemical conditions that promotes the living of organisms, and the balanced atmosphere attained as the result of temperature, wind, and humidity.
As all the above mentioned properties are necessary for maintaining a sustainable ecosystem, it is clearly understood that an ecosystem is a community of plants and animals and their physical surroundings.
do footballers get paid even though they do not win a match?
Answers
Answer:
However, in general, football players are paid whether they are paid or not. However, it is clear that if they are not on the field, they will not get a win, a goal or more.
Answer:
no
Explanation:
they shouldn't get paid unless they win
Please select the word from the list that best fits the definition
Gives a pictorial indication of how far and fast an object has moved
a. speed
b. velocity
c. frame of reference
Answers
Answer: the answer is C
Explanation:
hope it helps friend :)
1. Element S and i have the same of valence electron
2. element Cl and i have the same of valence electron
3.element Cu and i have the same number of energy level
4. Element He and i have similar chemical properties
5. Element Na and i have similar chemical properties
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Answer:
Explanation:
asd
WILL RATE BRAINLIEST!!!
When you use electricity in your home,
which resources are powering it?
Research the energy resources used
to power your state’s electrical grid
(that’s what supplies your home with
electricity). In the space below or on
a separate sheet of paper, create an
informative handout to provide to the
people of your state.
Include the following information in your handout:
• Which state do you live in?
• What is the population of your state?
• What percent of the electricity in your state comes from
nonrenewable resources?
• What percent of the electricity in your state comes from
renewable resources?
• What percent of the electricity in your state comes from
nuclear energy?
• Which renewable resource is used the most in your state?
• What is an interesting fact about energy usage in your
state?
I live in United Arab Emarates/Dubai
Answers
Powering Your Home: Understanding Energy Resources in Dubai, United Arab Emirates
Dubai, one of the seven emirates of the United Arab Emirates, is a rapidly growing city with a population of over 3.3 million people. With the increase in population and development, the demand for electricity has also risen significantly. Have you ever wondered where the electricity that powers your home comes from? In this handout, we will provide you with information about the energy resources used to power the electrical grid in Dubai.
Nonrenewable Resources:
Dubai relies heavily on nonrenewable resources such as natural gas and oil to generate electricity. As per Dubai Electricity and Water Authority (DEWA), in 2020, 94% of the electricity generated in Dubai came from natural gas and 6% from coal.
Renewable Resources:
Dubai has been working to diversify its energy mix by investing in renewable resources. According to DEWA, 6% of Dubai's electricity in 2020 was generated from renewable sources, such as solar and waste-to-energy. DEWA has set a target to increase the share of renewable energy in Dubai's energy mix to 75% by 2050.
Nuclear Energy:
Dubai is also investing in nuclear energy to diversify its energy mix. The first nuclear power plant in the UAE, the Barakah Nuclear Energy Plant, started operations in 2020. It is expected to generate 5.6 GW of electricity and will contribute to reducing carbon emissions.
Most Used Renewable Resource:
Dubai has the world's largest single-site solar energy project, the Mohammed bin Rashid Al Maktoum Solar Park. It is a key component of Dubai's clean energy strategy, and its capacity is expected to reach 5 GW by 2030. The solar park uses photovoltaic solar panels to convert sunlight into electricity.
Interesting Fact:
Dubai is home to the world's tallest building, the Burj Khalifa, which has been designed to be energy-efficient. It uses a combination of technologies such as a high-performance glass facade, an efficient air-conditioning system, and a double-decker elevator system that reduces energy consumption by 20%.
Conclusion:
Dubai's energy mix is currently dominated by nonrenewable resources, with natural gas being the primary source of electricity generation. However, the city is making significant strides to increase the share of renewable energy and diversify its energy mix. By investing in nuclear energy and the Mohammed bin Rashid Al Maktoum Solar Park, Dubai is working towards achieving its goal of becoming a sustainable city and reducing its carbon footprint.
Answer: Windmills and solar panels
Explanation: It is used by solar energy from energy and friction with the atmosphere and CO2