Answer:
Explanation:
first find popotential energy
M.E=P.E+ K.E
K.E=1/2MV^2
K.E=1/2×72×261
K.E=9396
168=9396+P.E
P.e=-9228
How does an object get its potential energy, give an example?
Answer:
example would be a rock sitting on a cliff
Explanation:
when work is done on object energy is transferred to the object and it gains gravitational potential energy.
The sum of the kinetic and potential energies of a system of objects is conserved: Group of answer choices only when no external force acts on the objects only when the objects move along closed paths only when the work done by the resultant external force is zero none of the above
The sum of the kinetic and potential energies of a system of objects is conserved only when no external force acts on the objects.
Conservation of mechanical energyThe principle of conservation of mechanical energy states that the total mechanical energy of an isolated system (absence of external force) is always constant.
M.A = P.E + K.E
where;
P.E is potential energy
K.E is kinetic energy
Thus, the sum of the kinetic and potential energies of a system of objects is conserved only when no external force acts on the objects.
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The radius of the earth is 6.37 x 10ºm How fast in meters per second is a tree on the equator moving because of the earth's rotation? How fast is a polar bear at the north
pole?
Answer:
yea what the other guy said
Select all that are true about halogens: Very reactive Nonr-reactive Period 3 Nonmetals Group 7A
The following are true about Halogens.
They are very reactive, They are non metals,They belong to group 7A They are in period 3What are Halogens?Halogens refer to non metallic elements that are found on group 7A of the periodic table and period 3. Examples of Halogens are chlorine, flourine, iodine, bromine, astatine and so on.
Some of the characteristics of Halogens are;
They form acids when they combined with hydrogen.They are very reactive.They are all fairly toxic.They combine with metals to form salts.They have seven valence electrons in their outer shell.They are electronegative.Therefore, The following are true about Halogens.
They are very reactive, They are non metals, They belong to group 7A They are in period 3.Learn more about Halogens from the link below.
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A positive charge of 0.00033 C is 25 m from a negative charge of 0.00017 C. What is the force of one of the charges due to the other charge in units of Newtons
The electrostatic force between the two charges is attractive force and the magnitude of this electrostatic force is 0.808 N.
Electrostatic force between the two chargesThe electrostatic force between the two charges is calculated by applying Coulombs' law as follows;
F = kq₁q₂/r²
where;
k is Coulomb's constantq₁ and q₂ are first and second charge respectivelyr is the distance of separationF = (9 x 10⁹ x 0.00033 x 0.00017)/(25²)
F = 0.808 N
Thus, the force of one of the charges due to the other charge is 0.808 N.
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Calculate the kinetic energy of a 4 kg object moving at 10 m/s.
Answer:
1/2 * 10 kg) * 5 m/s2. or 125 Joules
Explanation:
A 3 x 10^-6 C charge is 5m away from a -2x 10^-6 C charge A. Attractive because one is positive the other one is negative B. Determine the magnitude of the electrostatic force acting between them.
Answer:
0.0021576N
Explanation:
F=(k)(q1q2/r^2)
F=(8.99×10^9)(3×10^-6)(2×10^-6)/(5^2)
F=0.0021576N
How is a feeling of harmonic tension and forward motion created in the exposition of a sonata form
We can confirm that the feeling of harmonic tension and forward motion can be created in the sonata through the use of the conflict of tonalities between the themes.
What is harmonic tension?Harmonic tension is a musical term to describe "tension" generated by conflicting chords and chord progressions. This adds a level of depth and atmosphere to the performance and can be achieved through the method described above.
Therefore, we can confirm that the feeling of harmonic tension and forward motion can be created in the sonata through the use of the conflict of tonalities between the themes.
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A __________ is an abnormal crackling, rattling, or bubbling sound heard on auscultation of the chest.
A __rales ________ is an abnormal crackling, rattling, or bubbling sound heard on auscultation of the chest.
What are rales ?
Rales are an abnormal sound heard accompanying the normal respiratory sounds on auscultation of the chest
Rales heard over the lung bases are a sign of of heart failure that is of at least moderate severity. With acute pulmonary edema, rales are frequently accompanied by wheezing and expectoration of frothy, blood-tinged sputum.
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#SPJ2
When conducting scientific research, appropriate methods must be used to find information that is reliable and valid. Angela was assigned a research project about human body systems for her anatomy course. She would like to focus on the immune system, and more specifically, the effects of HIV on the immune system. Which of the following options would be the best way for her to conduct an online search about her topic? a. Type in "human body systems" HIV b. Type in "immune system" human c. Type in "HIV immune system" d. Type in "human immune system" HIV effects.
Answer:
Letter C. type in "human immune system" HIV effects
Explanation:
because she was focusing on the immune system and the effects of HIV in the human body system project
Answer:
its d
Explanation:
What happened to North American coastal waters when the great white shark population decreased?
The oyster population increased.
O The clam population increased.
The ray population increased.
The scallop population increased.
Answer:
The Ray Population Increases
Explanation:
This happens because the great white eats bigger animals
A person uses a match to light charcoal in a grill. Which statement describes
a chemical property of the charcoal?
A. It has a high boiling point.
B. It is an electrical insulator,
C. It has a high temperature
Answer:
It is flammable.
Explanation:
what is magnitude ?..
:(
Answer:
A Magnitude is simply a quantitative number while intensity gives us the idea of impact.
Explanation:
Hope this helps
someone please answer this ill give you brainliest and your getting 100 points.
Volcanism .
Mountain is found over the earth not inside (It has some parts inside but not much) .So mountain building is of no use.Seismic waves are formed by plate techtonics.Its of nno use.Finally the internal area of earth is filled with magma ,so volcanism is more requiredcan someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
Pacific and Australia
Explanation:
Convergent boundary is the area where two plates collide.
Means the direction of arrows should be opposite and towards each other .
Answer:
Pacific and Australian
Explanation:
Convergent boundaries are where two plates come together. Either tall mountains are formed on land or deep trenches in the ocean. There are deep ocean trenches where the Pacific and Australian plate converge.
A 2.0 kg melon is balanced on a circus performer's head. An archer shoots a 50.0 g arrow at the melon with a speed of 30 m/s. The arrow passes through the melon and emerges with a speed of 18 m/s. Find the speed of the melon as it flies off the performer's head.
The speed of the melon as it flies off the performer's head is 0.3 m/s
Law of conservation of momentum?The law of conservation of momentum states that for a system of colliding bodies, the total momentum before the collision is equal to the total momentum after the collision, provided there is no net external force acting on the bodies.
To find the speed of the melon, we use the formula from the law of conservation of momentum.
Formula:
mu+m'u' = mv+m'v'............ EquationWhere:
m = mass of the melonu = initial velocity of the melonm' = mass of the arrowu' = initial velocity of the arrowv = final velocity of the melonv' = final velocity of the arrow.From the question,
Given:
m = 2 kgm' = 50 g = 0.05 kgu = 0 m/s (at rest)u' = 30 m/sv' = 18 m/s.Substitute these values into equation 1
(2×0)+(0.05×30) = (0.05×18)+(2×v)0+1.5 = 0.9+2v2v = 1.5-0.92v = 0.6v = 0.3 m/s.Hence, The speed of the melon as it flies off the performer's head is 0.3 m/s.
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If the volume of a container of gas remains constant, what will happen to the pressure of a gas if you increase the temperature?
Answer:
This example of the effect of volume on the pressure of a given amount of a confined gas is true in general. Decreasing the volume of a contained gas will increase its pressure, and increasing its volume will decrease its pressure.
Explanation:
Hope it helps
Hold a pencil at arm's length. Focus on it with one eye and then the other. Note that the apparent position of your pencil shifts with respect to the background. Now hold your pencil closer to your face and repeat. The apparent position of your pencil shifts even more. This effect is known as the
Based on what we know, we can confirm that this effect is often referred to as the Parallax effect.
What is the Parallax Effect?This effect explains the differences that we see when performing this experiment with the pencil. It attempts to explain the difference in the apparent position that we see when viewing the pencil from differing lines of sight. This has to do with the change in the angle we are viewing from when we switch eyes.
Therefore, we can confirm that this effect is often referred to as the Parallax effect.
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batteries are used to power flashlights the energy stored in batteries is converted to light energy given off by flashlights what happens to the energy as it changes form? A) all of the energy is transformed into light energy. B) some of the energy transforms to thermal energy C) half of the energy is transformed to thermal energy. D) half of the energy is transformed to light energy.
Answer:
some of the energy is transformed to thermal energy
Answer:
some of the energy transforms to thermal energy
Explanation:
2. Which of the following is not an effect of tides?
A. Fishermen use tides to maximize fishing and time fishing trips.
B. Energy from the moving water can be used in hydroelectric dams.
C. Tides can be used to predict weather events.
D. Tides help keep the oceans clean and provide animals with nutrients.
Answer:
D. Tides help keep the oceans clean and provide animals with nutrients.
Explanation:
A. I have gone fishing and used tides to maximize time in my trips
B. Tides are incoming water, so yes, dams can use them to create power
C. Tides can be plugged into the water cycle and used to predict weather events
D. If tides kept the ocean clean, why is it still dirty? Animals don't rely on tides to get nutrients
What happens in
this circuit after the
current leaves the
battery?
A. It goes through all three lights and back to the battery.
B. It goes through all three lights and stops.
C. It goes through the wire and stops.
Answer:
The current is basically the intensity of the electrons over a period of time, in a way.
So, if electrons are leaving the battery to carry charge, they must come back to the battery eventually :).
Your answer is A, it goes back to the battery
Which of the following is true?
The shorter the wavelength + the higher the frequency= the higher the energy
The longer the wavelength + the lower the frequency= the lower the energy
Both A and B are correct.
can someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
Point number 3.
Explanation:
Volcanism can be studied to found out evidence of the internal structure of the Earth.
Answer:
Volcanism
Explanation:
Volcanism refers to study about the creation of volcanos.We know the earth's inner side is filled of magma which gets out through volcanos.So volcanism should be learnthelppppppppppppp, 15 pts
Answer:
You answer is C. A hamburger on the grill
What is Conduction?
Conduction is the transfer of heat through DIRECT CONTACT.
How can I tell the difference between Conduction, Convection, and Radiation?
To know how to find the difference, you must first now what each type of heat transfer is.
Conduction-the transfer of heat through DIRECT CONTACT.
Radiation-The transfer of heat without direct contact, energy
Convection-Heat rising and cold sinking
Just think about these definitions everytime you see a question like this!
1.what would happen if hypothetically i travelled more than the speed of light?
2.why are most objects in the universe roundish
3.why do the laws of physics on macro level differ from those on the quantum level.
4.How do light travel in space if there is no medium?
if the momentum of the erth is used to catapult space missions towards other planets, does it mean that if there was a humongous planet, its momentum could catapult me to a larger range ?
5.whats beyond the observable universe?
6.why cant we use gravity of an object in space and create an artificial atmosphere. how could that be done?
If you have more questions you can tell me in comments.
Answer:
Explanation:
I'm assuming these are personal questions? Because a few of your questions are incorrect. I'll do my best to explain the ones I do know.
1.) Nobody actually knows what would happen if you travel faster than light. Einstein showed this was impossible due to it requiring an "infinite" amount of energy. My personal belief is that time itself stops existing. Your guess is as good as mine, nobody really knows.
2.) Most objects in the universe are round mostly because of gravity and density. All objects in the universe strive for minimum energy states. A sphere has a minimum gravitational potential than other geometry.
3.) Again, this is another one where nobody knows "why." On the macroscopic, there is classical mechanics. Then once you go into the microscopic world, you enter the realm of quantum mechanics. It's not that the "laws" are different. There is still conservation of momentum and such. Its just that they're expressed differently.
4.) The explanation for this is most likely due to light being composed of particles, photons. Sound cant travel if there is no medium, because sound is purely a wave. There is no such thing as a sound particle, at least not a physical one. You can think of light as traveling photons carrying energy. That's the particle interpretation of light.
Space missions do not use the Earth's momentum to catapult things in space. Each mass in the universe creates a corresponding gravitational field. So, planets create gravitational fields. The current theory of gravity is Einstein's theory of General Relativity, which states that energy and momentum curve spacetime. Special relativity proved the energy/mass equivalence. General relativity predicts that spacetime will curve around large masses. You can think of planets bending spacetime like a bowling ball in the center of a trampoline. This process in reality is 3-D and not 2-D like the trampoline analogy. But, the entire process of "catapulting" is using these gravitational "wells" of spacetime to minimize fuel and travel time.
5.) We don't know what beyond the observable universe. From the Big Bang, the universe only existed for about 13 billion years. So, light only traveled for 13 billion years long. We cant see passed the observable universe if the light hasn't even reached us yet. The reason the size of the observable universe is larger than 13 billion light years, is because we predict the universe is expanding faster than the speed of light. Special relativity demands that mass cannot go faster than the light, but it never restricted spacetime itself.
6.) Planets use gravity to keep their atmosphere. We could theoretically place a massive object on a planet and increase the gravitational field. But that is really impractical. We can't "create" gravity because we dont know if gravity is a particle. We only think of it at the moment as a non-physical wave, a ripple in spacetime. I have personal thought experiments in how we could terraform a planet, and create atmospheres. But that goes into electromagnetism, and not gravity.
A projectile is fired from an airless world with a speed Vescape. What is the total energy (Etot=KE−GMm/r) of the projectile?
Answer:
Etot= Zero
Explanation:
The total energy would be zero because the total potential energy and total kinetic energy would be zero
a ball of mass 16 kg on the end of a string is spun at a constant speed of 2 m/s in a horizontal circle with a radius of 1m. What is the work done by the centripetal force during one complete revolution
The work done by the centripetal force during om complete revolution is 401.92 J.
Centripetal force is a force that acts on a body undergoing a circular motion and is directed towards the center of the circle in which the body is moving.
To Calculate the work done by the centripetal force during one complete revolution, we use the formula below.
Formula:
W = (mv²/r)2πrW = 2πmv²................... Equation 1Where:
W = Work done by the centripetal forcem = mass of the ballv = velocity of the ballπ = pieFrom the question,
Given:
m = 16 kgv = 2 m/sπ = 3.14Substitute these values into equation 1
W = 2×3.14×16×2²W = 401.92 JHence, The work done by the centripetal force during om complete revolution is 401.92 J.
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2. Summarize how the force of gravity
factors into at least three processes in
the formation of stars. SC.8.E.5.4
help me with Physics. please
On Saturn, the acceleration due to gravity is 11.08 m/s². On Venus, the acceleration due to gravity is 8.87 m/s². For an alien traveling to both planets, which answer is true?
A. On Venus, the alien would have less mass because the gravity is lower on Venus than on Earth.
B. On Venus, the alien would have more mass because the gravity is lower on Venus than on Earth.
C. On Saturn, the alien would weigh than on Earth because the gravity is higher on Saturn than on Earth.
D. On Saturn, the alien would weight less than on Earth because the gravity is higher on Saturn than on Earth.
Considering the difference between mass and weight, On Saturn, the alien would weigh higher than on Earth because the gravity is higher on Saturn than on Earth.
Difference between mass and weightMass is the amount of matter that a body contains. That is, mass is a measure of the amount of matter that the body possesses.
Weight is the action exerted by the force of gravity on the body; that is, it is a measure of the force that is caused on said body by the gravitational field. The weight is calculated by:
P= m×g
where
P = weight, in Newtons (N)m = mass, in kilograms (kg)g = gravitational constant, in (m/s²)The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.
Statement correctConsidering the difference between mass and weight, the definition of weight, and that gravity on Earth has a value of 9.8 m/s², the correct answer is option C.) On Saturn, the alien would weigh higher than on Earth because the gravity is higher on Saturn than on Earth.
This can be seen in the expression for the weight calculation. Since the mass is the same both on Earth and on Saturn, if the gravity of the latter is greater, the product of mass with gravity must be greater.
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It is best to say that efficient plumbing _______. a. reduces water pollution by using less water b. reduces water pollution by using cleaner water c. increases water pollution by using more water d. reduces water pollution by using dirty water please select the best answer from the choices provided a b c d
It is best to say that efficient plumbing reduces water pollution by using less water. Option a is correct.
What is plumbing?Plumbing is a water conveyance system that transports water for a variety of uses. It transports water from one location to another via pipes, valves, and tubes.
It has the ability to transport water from a large reservoir to several areas. It is required for agricultural irrigation, domestic cleanliness, and the provision of potable drinking water.
Filters are often used in plumbing systems to remove pollutants from the water. An effective plumbing system lowers water pollution by using less water
Since it allows for adequate flow of water for usage and can automatically close or turn up as needed, preventing the loss of clean water and therefore preventing pollution.
It guarantees that clean water is used in a sustainable manner. efficient plumbing reduces water pollution by using less water.
Hence option a is correct.
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Answer:
B
Explanation: