I really need help on this question, i cant figure out how to answer it, i really need help, everything is due tmrw, pls help
Answers
Answer:
ok
Explanation:
Related Questions
A 65 kg bungee jumper jumps off of a bridge. At an instant when they are 50 m above the ground, they are falling at a speed of 40 m/s, and the elastic in their bungee cord
(k = 650 N / m) is stretched by a distance of 2.0 m. What is the total mechanical energy of the bungee jumper at this instant ?
a. 1300 J
b. 52000 J
c. 31850 J
d. 85150 J
Answers
Answer:
the mechanical energy = a 1300J
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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The Structure of Atoms
1. What two sub-atomic particles are located in the nucleus of the atom?
2. What is the difference between the atomic number & the mass number of an element?
3. Where is the majority of the mass located in an atom?
Answers
Answer:
1. protons and neutrons
2. the atomic number states the number of protons present and the mass number says the total number of protons and neutrons
3. nucleus
Explanation:
Use the data in the table to explain how you could determine the volume of the block.
Answers
To find the volume of the block, subtract the initial water volume from the final water volume, convert the change in water volume to cubic centimeters, and consider it as the volume of the block.
To find the volume of the block using the measurements provided.
1. Calculate the change in water volume:
The initial water volume is given as 62.3 mL, and the final water volume is given as 89.5 mL. To determine the change in water volume, we subtract the initial volume from the final volume: 89.5 mL - 62.3 mL = 27.2 mL. This value represents the increase in water volume caused by placing the block in the graduated cylinder.
2. Convert the change in water volume to cubic centimeters:
Since 1 mL is equivalent to 1 cubic centimeter (cc), we can directly convert the change in water volume from milliliters to cubic centimeters. In this case, the change in water volume is 27.2 mL, which is also equal to 27.2 cc.
3. Determine the volume of the block:
When the block is placed in the graduated cylinder, it displaces some amount of water, resulting in an increase in water volume. By measuring this increase in volume, we can determine the volume of the block itself. In this case, the change in water volume of 27.2 cc represents the volume of the block.
By following these steps, we can find the volume of the block based on the provided measurements.
Therefore, By deducting the initial water volume from the final water volume and converting the difference in water volume to cubic centimeters, the block's volume can be calculated. the volume of the block is 27.2 cc.
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•Then I should :calculate the time of the block to fall
Which effect is created when two sound waves that are close in pitch
interact?
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
which option do you think could cause near sightedness?
a) the eye lens doesn't refract light
b)the eye lens is concave
c)the eyeball is too long
D)the retina cells aren't reactive to light
Answers
Answer:A
Explanation:because it doesn’t refract light so you can’t see close
Answer:
A) the eye lens doesn't refract light
Explanation: because the eye doesn’t refract, or bend, light properly to focus on the retina. Makes eyesight appear blurry and distorted.
Which options identify functions that cells carry out to support life?
(Select all that apply.)
1. avoid burning food molecules to save energy
2. remove waste materials
3. fight foreign cells or harmful molecules
4. burn food molecules to produce energy
Answers
When you drop something, first of all it accelerates.
The faster it falls, the bigger the force of ______ that acts on it.
choose from the list to complete the sentence:
friction gravity air pressure
note: apparently the answer is friction but it doesn't make sense to me so please explain.
Answers
The faster an object is going, the more resistance there will be. An example of this would be if you're running the faster you run, the more air is going against you.
I hope this helps!
The graph shows the motion of a car. Which segment shows that the car is slowing down? A, B, C, or D Graph:
Answers
C segment of the graph shows that the car is slowing down.
What is velocity?The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.
In the given graph, Velocity of varying with time. When the car is slowing down, the slope of the graph is negative in this region.
According to figure: segment C and segment E has negative slope. Hence, according to the option: C segment of the graph shows that the car is slowing down.
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A __ is the starting point from which you describe an objects velocity
Answers
Answer: Reference point
Explanation: A reference point is a starting point
Explanation: The reference point is the starting position.
A spaceship fires a movement thruster, releasing gases at high pressure.
What are the forces in the force pair for this example?
a) the force the gasses apply to the ship
the force the ship applies to the gasses
b) the force the gasses apply to space
the force the ship applies to the gasses
c) the force the gasses apply to space
the force the ship applies to gasses
d) the force the gasses apply to the ship
the force the ship applies to space
Answers
please help me with these two questions... thanks
Answers
20) B because heating it transfers thermal energy and passing a current transfers electrical energy. I think that shining a light for long enough may heat the block up so it could be D but I’m not sure if that’s what it’s asking
Please Help Me!!!!!!
Answers
Answer:
C: Electrical to chemical
the electricity turns into chemical energy to light the candle.
what is the answer i need answers now
Answers
Answer:
listening ,communication ,resolution
Explanation:
How will the total energy change as the car moves from point A to B to C? Assume that none of the energy is lost as friction or heat energy.
A The total energy will increase as the kinetic changes to potential and back again.
B Kinetic energy will change into potential energy and back again, but the total energy will stay the same.
C The total energy will decrease because the potential energy will change into kinetic energy.
D The total energy will decrease since it is losing potential energy at point E.
Answers
Answer:c
Explanation: i am on study island and had that
You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very heavy rock into the back of a truck. The truck bed is 3 feet off the ground. Your father pulls out a 5-foot plank and begins to set up a ramp. At the same time, you (who know about mechanical advantage!) have found a plank that is 8 feet long, and you show it to your father.
Which plank will give you the most mechanical advantage? Calculate the MA for each plank.
Answers
Plank that is 8 feet long will give more mechanical advantage than 5-foot plank .
What is mechanical advantage?The force amplified by utilizing a tool, mechanical device, or machine system is known as mechanical advantage.
mechanical advantage of a ramp = the length of the slope/ the height of the ramp.
Height = 3 feet ( fixed).
Hence, plank that is 8 feet long will give more mechanical advantage than 5-foot plank because the length of the slope is greater in the case of plank that is 8 feet long.
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Answer is 8 ft so that it is easier to move
Q1. Think up some examples of your own.
Write four more sentences, one
for each of the words 'push', 'pull', 'stretch' and 'turn'.
answer as a 7th grader, i need all answers.
Answers
Answer:
Explanation:
u deserve brainliest
2.I pulled the door open
3.I stretched the shirt
4.I turned around
Please help.
I need to explain the electromagnetic spectrum to fifth graders.
Answers
Answer:
Explanation:
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.
The electromagnetic spectrum covers electromagnetic waves with frequencies ranging from below one hertz to above 1025 hertz, corresponding to wavelengths from thousands of kilometers down to a fraction of the size of an atomic nucleus. This frequency range is divided into separate bands, and the electromagnetic waves within each frequency band are called by different names; beginning at the low frequency (long wavelength) end of the spectrum these are: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays at the high-frequency (short wavelength) end. The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications. There is no known limit for long and short wavelengths. Extreme ultraviolet, soft X-rays, hard X-rays and gamma rays are classified as ionizing radiation because their photons have enough energy to ionize atoms, causing chemical reactions. Exposure to ionizing radiation can be a health hazard, causing radiation sickness, DNA damage and cancer. Radiation of visible light and longer wavelengths are classified as nonionizing radiation because they have insufficient energy to cause these effects.
Throughout most of the electromagnetic spectrum, spectroscopy can be used to separate waves of different frequencies, producing a spectrum of the constituent frequencies. Spectroscopy is used to study the interactions of electromagnetic waves with matter.[4]
Here are a few examples of the types of energy found in the electromagnetic spectrum:
Radio Waves - Radio waves are the longest type of energy in the electromagnetic spectrum. They are used to send signals for things like TV and radio shows.
Microwaves - Microwaves are shorter than radio waves and are used for things like cooking food in a microwave oven and sending signals for cell phones.
Infrared - Infrared is the type of energy that makes you feel warm when you are in the sun. It's also used to control your TV remote.
Visible Light - This is the type of energy that you can see! It includes all the colors of the rainbow - red, orange, yellow, green, blue, indigo, and violet.
Ultraviolet - Ultraviolet is the type of energy that makes your skin tan. It's also what makes a black light glow.
X-rays - X-rays are a type of energy that can go through your skin and show what's inside your body. Doctors use x-rays to see broken bones.
Gamma Rays - Gamma rays are the shortest type of energy in the electromagnetic spectrum. They are very powerful and are used in medicine to treat cancer.
So, that's the electromagnetic spectrum in a nutshell! It's a range of different types of energy that we use every day in many different ways.
How do we know there has not been an increase in the number of earthquakes? Officials from the U.S. Geological Survey, the government agency that keeps track of earthquakes, point to statistics. On average, there have been no more earthquakes so far in 2010 than there were in previous years.
What Happens During Earthquakes?
In reality, it's not the number of quakes that has gained our attention, but the devastating impact quakes can have. Earthquakes are very natural—it's inevitable that they'll happen because of the way the planet works. The earth's surface is made up of tectonic plates that fit together like puzzle pieces and are always moving past each other. When two of the plates' edges get caught, stress builds up at the fault line—the crack between the plates. When the plates are finally able to break free of each other, the stress is released, and an earthquake occurs. Earthquakes of varying strengths happen every day, usually at fault lines. Some of these quakes have a high magnitude, while others are relatively weak. But it's often where an earthquake takes place that determines whether it will be something that goes largely unnoticed, or a disaster that affects thousands of people.
What Is Changing?
In the past, earthquakes were not as much of a problem because Earth's population was smaller, and cities were less populated.
"Look at some of the big [earthquakes] recently," said Debarati Guha-Sapir of the World Health Organization. Guha-Sapir cited some earthquakes that took place in areas where the population had increased in recent years, making the quakes more serious. "Had the Izmit or Bhuj quakes [of 1999 and 2001] happened 30 years ago, the events would have been relatively insignificant, as the [populations] of these cities were a third of what [they were when the earthquakes happened]. Increasing population density makes a small event into a big one."
Some of the earthquakes that took place in early 2010 occurred in highly populated areas, as well. More people are moving into megacities that happen to be built on fault lines—and many cities are on fault lines. Of the 130 cities with more than one million people, more than half are in earthquake zones, making them more prone to earthquakes.
In many of these cities, officials have drawn up laws requiring that buildings be designed and constructed to endure earthquakes. But some cities, particularly those in developing countries, lack the resources to do this. There, people are rapidly putting up substandard buildings that can't withstand the force of the shaking earth. For example, the Haiti earthquake took place near the nation's crowded capital. There was a great deal of destruction because there were "too many people crammed into a city that wasn't meant to have that many people and have an earthquake," said University of Miami geologist Tim Dixon.
Another reason quakes seem worse is that we're paying more attention. Everyone noticed when the Haiti earthquake was quickly followed by the Chile earthquake. Many people watched the news and the Internet for updates on these disasters, unable to believe that they were seeing two major earthquakes in such a short period of time. But eventually, the earth will have a period when earthquakes are minor or in unpopulated areas. Then people won't notice quite so much anymore.
"People are paying attention to the violent planet we've always lived in," said Dennis Mileti, a seismic researcher. "Come back [at a time when] there have been no [noticeable] earthquakes, [and] most people will have forgotten [about them] again."
According to the article, what is one reason why it seems as if the world is experiencing more earthquakes than usual?
Answers
Answer: because there has not been one in years
Explanation: there was not on now 2023, 2022, 2021, 2020, and 2019
Answer:
The number of earthquakes has not increased because earthquakes didn't happen in the USA for a while.
Explanation:
If the pressure inside a balloon was 15 Pa and the volume was 120 ml, what is the volume if the pressure increases to 400 ml? Plz answer quickly
Answers
Answer: If the total pressure in the container is 20. atm, what is the pressure exerted by ... converting standard atm pressure to pa. 1. ... If the volume of the gas increases to 120 mL, what is the new pressure? ... If the volume of 2.00 moles CO2 is 500 mL, how many moles of CO2 have a volume of 400 mL under the same conditions?
Explanation: does this help you any? tell me if it does or not.
50 Pa
Explanation:
Please see the picture attached!
I hope this helps! Please comment if you have any questions.
Place the parts of the human circulatory system in order from highest to lowest degree of internal organization.
→ → →
Answers
Answer: The human circulatory system can be arranged from the highest to the lowest degree of internal organization as follows: Heart, Blood Vessels, Arteries, Veins, and Capillaries.
Explanation: The human circulatory system can be arranged from the highest to the lowest degree of internal organization as follows:
Heart: The heart is a vital organ responsible for pumping oxygenated blood to the body and deoxygenated blood to the lungs. It consists of chambers (atria and ventricles) and valves that regulate blood flow.
Blood Vessels: Blood vessels form a network of tubes that transport blood throughout the body. They can be classified into three types: arteries, veins, and capillaries.
Arteries: Arteries are thick-walled blood vessels that carry oxygenated blood away from the heart to various parts of the body.
Veins: Veins are blood vessels that transport deoxygenated blood from the body back to the heart. They have thinner walls compared to arteries and contain valves to prevent backflow.
Capillaries: Capillaries are tiny, thin-walled blood vessels that connect arteries and veins. They facilitate the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues.
Please note that this arrangement is based on the internal organization of the circulatory system, with consideration given to the hierarchical structure and function of each component.
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Answer:
Cell, tissue, organ and organ system
Explanation:
The correct order from the lowest to the highest degree of internal organization is the following Cell, tissue, organ, and organ system then at last whole body. It is because the cells are produced in order to form the tissues in the body and in order for an organ to be produced tissues are essential and are formed and in order for a system.
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
PLEASE HELPPPPPP
Write a paragraph to describe the similarities and differences between the four main protists focused on: euglena, amoeba, paramecium, and volvox.
Answers
Euglena, amoeba, paramecium, and volvox are all protists, which are a diverse group of single-celled organisms. All four protists are unicellular and can be found in aquatic environments. One similarity between these protists is that they all have the ability to move, whether it be through cilia, flagella, or pseudopodia. However, there are also differences between these protists. Euglena has both chloroplasts and a flagellum, which allows it to carry out photosynthesis and move through water. Amoeba, on the other hand, moves through the use of pseudopodia and can change its shape. Paramecium is a ciliate and uses its cilia to move and capture food. Volvox is a colonial organism, made up of many individual cells that work together to move and reproduce. Overall, these four protists have different characteristics and abilities, but all are considered protists and share certain similarities.
Mechanical energy is the sum of kinetic and potential energy in an object. It is energy in an object due to its motion, position, or both. How does the total mechanical energy respond as kinetic energy and potential energy change? Why?
Answers
In pea plants, the allele for round peas, R, is dominant over the allele for wrinkled peas, r. What is the phenotype of a pea plant with genotype Rr? **Make a punnet square for help**
A) Wrinkled
B) Slightly wrinkled
C) Some round and some wrinkled
D) Round
Answers
Answer: D) Round
Explanation:
Phenotype is what the plant looks like, so with a genotype of Rr, the plant would be round. R (round) is dominant over r (wrinkled). The plant is heterozygous round.
You can't do a Punnett square because you don't know the genotypes of the parent plants.
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.
1.What is a non example of constant?
2.What is an example of constant?
Answers
Answer:
1. A non example of a constant in physics is a value that changes. For example, the temperature of Hong Kong, let's say, is not a constant, since it changes and does not stay at the same value. It gets higher in the summer and lower in the winter.
2. An example of a constant in physics would be the gravitational acceleration of the Earth. Since the Earth's mass' changes is negligible when compared with the overall mass of the Earth (unless something big happens, of course, like a meteor or asteroid), the gravitational acceleration on Earth is largely unchanged, even constant from our viewpoint.
Explanation:
Hope this helped!
Answer:
a science experiment, the controlled or constant variable is a variable that does not change. For example, in an experiment to test the effect of different lights on plants, other factors that affect plant growth and health, such as soil quality and watering, would need to remain constant. a dependant variable(opposite)would be the properties of the plants themselves, which the scientist is observing in relation to the changing light. These properties might include the plants' color, height and general health of the plant
hope this helped
BRAINLIEST+10PTS: does ozone absorb just harmful UV rays? Or just a random portion of UV?
Answers
Answer:As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ozone, water vapour, oxygen and carbon dioxide. UVA is not filtered as significantly by the atmosphere. Is there a connection between ozone depletion and UV radiation? Ozone is a particularly effective absorber of UV radiation.
Explanation:
I had old notes
Answer:
The ozone layer absorbs a random portion of UV rays.
Explanation:
The ozone layer absorbs a random portion of UV rays because the only way UV rays could be harmful to your skin is if there is too much of it. All UV rays are bad, but the only reason you get harmed from them is if you absorb an excessive amount of them.
need help fast!!!! plz
Answers
How is the frequency of a wave measured?
a. the number of complete back and forth vibrations of a particle of the object per unit of time
b. how loud the sound is
c. how many animals can hear the sound
d. how high do the sound waves go