Which equation expresses the conservation of mechanical energy in a system where the only forms of mechanical energy are kinetic energy and elastic potential energy?
a.
1/2mvi2 + mghi = 1/2mvf2 + mghf
b.
1/2mvi2 + mghi + 1/2kxi2 = 1/2mvf2 + mghf + 1/2kxf2
c.
1/2mvi2 + 1/2kxi2 = 1/2mvf2 + 1/2kxf2
d.
mei = mef
c it hink this because im geuss
can someone please tell me how to calculate the initial kinetic energy
In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2
What do sunspots, solar prominences, and solar flares all have in common?.
If carrots have 80j of energy how much energy will a rabbi get from eating the carrot
Answer:
8
Explanation:
According to the 10% law of energy transfer,
only about 10% of energy will be transferred to
the successive level from the previous trophic
level. Therefore according to this law carrot will
have the highest energy level as it is present at
the lowest trophic level.
Then it will transfer 10% of its consumed energy
to the rabbit and then snakes will get 10%
energy of rabbit after consuming it. Therefore if
the energy amount is given it can be calculated
by dividing it by 10 for upper trophic level.
So if a rabbit receives 80 calories of energy
from eating carrots it will pass only 8
(80/10=8) calory of energy on to a snake.
Therefore the correct answer is 8 calories
We can see the object due to
Answer:
we can see object due to reflection of light.
During which phase of the moon can a lunar eclipse happen?.
When the curvature radius of a converging lens is increased, the size of the image _(blank)_.
A. is magnified
B. is reduced
C. stays the same
When the curvature radius of a converging lens is increased, the size of the image is reduced.
What is radius of curvature ?“The radius of curvature is the radius of sphere formed by the convex or concave mirror.” It is also equal to the distance between the pole and centre of curvature.” The sign convention for focal length and radius of curvature is the same.
What is converging lens?“Converging lenses are lenses which converge the light rays coming towards them, whereas diverging lenses are lenses which diverge the rays coming towards them.” A converging lens have positive focal length.
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Which of the following statements is true for both solar energy and wind energy? (1 point)
O Energy collection equipment can be installed in agricultural areas without affecting crop production
O Power from this energy source can easily be integrated into existing power grid systems.
O Energy is able to be collected both day and night.
O Power generation using this energy source does not contribute to water pollution
The statement that is true for both solar energy and wind energy is that power generation using this energy source does not contribute to water pollution.
What is solar and wind energy?Solar energy is the energy in the form of electromagnetic radiation emitted from the Sun while wind energy is the energy generated from from moving currents of the wind using wind turbines.
Solar and wind energies are both renewable sources of energy i.e. they cannot be exhausted.
However, the generation of power from both solar and wind sources does not pollute water.
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This type of soil is found in warm, humid climates. question 5 options: pedocal laterite pedalfer humus
Answer:
Laterite would be your answer.
Explanation:
I hope this helps!
Laterite is the type of soil is found in warm, humid climates.
What is laterite soil?Laterite is rich in iron and aluminum soil and rock type that is thought to have originated in hot, humid tropical climates. Nearly all laterites are of rusty-red hue, because of significant iron oxide concentration.
They form as a result of intense and extended erosion of the underneath rock material, which occurs most often when there are high temperatures and significant rainfall, with alternate wet and dry intervals.
Tropical weather is a long-term chemical weathering process that results in a wide range of soil thickness. Laterite is the type of soil is found in warm, humid climates.
Hence laterite is the correct option.
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Can someone help me, I'll give you brainliest!!! (For Dark Paradox)
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
What Daryl said is correct and the relationship among them is a causation than a correlation, because we know that high pitched sound wave has more frequency than that of low pitched sound wave. and we also know that if the medium is same then velocity of wave is same* so if there is high pitched sound wave, it has shorter wavelength and if there's low pitched sound wave it has longer wavelength. since there's an inverse relationship between wavelength and frequency.
I hope it was easy to understand, let me know if you have doubts ~
Which of the following is NOT a chemical change/reaction?
Question 3 options:
2 liquids are combined, and a solid precipitate is formed
phase/state change (solid, liquid, gas)
production of gas bubbles
rusting metal
Answer:
rusting metal I think hehe
If the temperature of water in which the sound wave travels
decreases from 90°C to 50°C, then what will happen to the
velocity of the wave?
till
The sound wave travels faster at higher temperatures and slower at lower temperatures.
What will happen to the velocity of the wave if the temperature decreases?At a lower temperature, particles of the medium are moving more slowly as compared to higher temperature. Due to lower temperature, longer time is required to transfer the energy of the sound waves.
So we can conclude that sound travels faster at higher temperatures and slower at lower temperatures.
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Answer:
It will travel slower
Explanation:
As an ambulance siren passes and moves away from you, the sound waves'
frequency __________
and their amplitude ________
A. increases,
decreases
B. increases,
increases
C. decreases,
increases
D. decreases,
decreases
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
Amplitude and frequency are two properties of sound waves that decreases as distance from source decrease.
Therefore, as the ambulance moves away,
frequency - decreasesamplitude - decreasesSo, correct choice is D
You catch a 219 g ball moving at 6.1 m/s. If you catch the ball in a time period of
0.138 s what is the magnitude of the average force you must supply to the ball to
stop the ball?
Answer in units of Newtons (N)
Answer:
The magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.
Explanation:
Let's think Newton's 2nd Law: F = ma.
We are given the mass of the ball: 219 g ⇒ .219 kg.
We are given the initial velocity, time, and final velocity of the ball ∴ we can solve for acceleration.
We are trying to find the force needed to stop the ball.
Let's find the acceleration of the ball first.
We have the initial velocity of the ball, 6.1 m/s.We have the time it would hypothetically take the ball to stop, .138 s.We have the final velocity of the ball, 0 m/s (since we are trying to stop the ball).Now, we can plug these known values into this kinematic equation and solve for acceleration, a.
v = v₀ + at 0 = 6.1 + a(.138) -6.1 = .138a a = 44.2029 m/s²Substitute acceleration and mass into F = ma and solve for the force.
F = (.219)(44.2029) F = 9.68 NThe magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.
During anomalous expansion of water ,heat transfer is limited to conduction and radiation only ,explain.
Heat transfer is limited to conduction and radiation only in anomalous expansion of water simply because of the temperature at which the expansion occurs and density
What is anomalous expansion of water?Anomalous expansion of water is a property of water in which water expands instead of contracting.
Anomalous expansion of water makes water less dense. The major effect of this anomalous expansion it will still remain less dense and at the surface of water.Interestingly, this expansion occurs when it is cooled from 4°C to 0°C.Learn more about properties of water:
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If these cranes make the work being done ten times easier, what is the mechanical advantage?
A. cannot be determined
B. ten
how did the intensity of a sound wave change if the distance from the source is decreased by a factor of 2?
Answer:
If it is increased by a factor of 2 then it would be decreased by a factor of 4.
Explanation:
I hope you have a great day!
Anygays-
VOTING BRAINLIEST FOR ANYONE WHO ANSWERS RIGHT!!
PLS HELP
Answer:
B
Explanation:
-1 e so the atomic number should increase so,
B. Np
At what temperature are Celsius and Fahrenheit equal?
Answer:
Celsius and Fahrenheit are the same at
— 40 degree since the scales converge.
Celsius and Kelvins become equal at
high temperature as the difference of
273.15 between them gets lost in the
noise. 0 degree Celsius is equal to 32
degrees Fahrenheit.
Kinetic energy is proportional to?
v2
work
v
a
Hi! Look below
KE=1/2mv²Hence
[tex]\\ \rm\Rrightarrow KE\propto m[/tex]
[tex]\\ \rm\Rrightarrow KE\propto v^2[/tex]
Option A
Answer:
A. V²
Explanation:
The kinetic energy of a body is the energy by virtue of its motion.
[tex]k.e = \frac{1}{2 }m v {}^{2} [/tex]
Where V is the velocity
and m is the mass
1/2 is the constant term. So we can write as
K.Eαm and K.E.αv²
Starting in 2009, astronomers have been discovering really cool objects out there (cool here meaning low-temperature, as well as really interesting), which they have called Y dwarfs. What distinguishes these brown dwarfs from others that astronomers have discovered
These brown dwarfs can be distinguished from other star-like objects because they exhibit absorption lines from the ammonia molecule in the spectra.
What are brown dwarfs?Brown dwarfs are star-like (small) objects in the external space that exhibit very low cold temperatures.
Brown dwarfs are not only small stars but also huge gaseous planets such as Saturn and Jupiter.
In consequence, brown dwarfs are a wide category that includes both planets and star-like objects.
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How many electrons do most atoms seek to have in their outermost shell, causing covalent bonds to form? 1 3 4 8
Answer:
8
Explanation:
It is because the outermost energy level carries a maximum of 8 electrons
8 electrons do most atoms seek to have in their outermost shell, causing covalent bonds to form
What is a covalent bond?The interatomic bond is formed when two atoms share an electron pair. The electrical attraction of their nuclei for the identical electrons causes the binding.
When the total energy of the bound atoms is lower than that of widely spaced atoms, a covalent bond is formed.
When an atom's outermost electron shell is full, it is the most stable and least reactive. The octet rule states that most key biological elements require eight electrons in their outermost shell to be stable.
Hence 8 electrons do most atoms seek to have in their outermost shell, causing covalent bonds to form
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What is your understanding of Electricity? Describe how electricity works, circuits, how does it move, what is moving? Where does electricity come from?
Delusions of grandeur is the false belief that __________. a. one is being manipulated b. emphasizes self-importance c. emphasizes self-manipulation d. one is being harassed
The delusion of grandeur is a false belief that emphasizes self-importance. Option b is correct.
What are delusions?Delusions are characterized as persistent, erroneous beliefs that contradict reality. A person in a delusional condition is unable to let go of their convictions, despite opposing facts.
Misinterpretation of circumstances frequently reinforces delusions. Many illusions are accompanied by some degree of paranoia.
One of the most prevalent is delusions of grandeur. It's when you imagine you have more power, riches, intelligence, or other great qualities than you actually do.
The delusion of grandeur is a false belief that emphasizes self-importance.
Hence option b is correct.
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Answer:
B. emphasizes self-importance
Explanation:
got it right on edge 2022
The form of energy transfer that takes place in a house heated by forced air is
primarily
(A) convection.
(C) radiation.
(B) conduction.
(D) work.
(A) convection
would be your anwser
An object orbiting the sun in an ellipse can be said to be:.
Answer:
always accelerating
Explanation:
Answer:
B. Always accelerating
Explanation:
I recently did a review with an identical flashcard!
positively charged center of an atom
Answer:
the nucleus
Explanation
A solid cylindrical disk has a radius of 0.15 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 50-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 110 rad/s2. What is the mass of the disk?
Answer:
Torque = I α = 1/2 M R^2 α where α is the angular acceleration
Torque = F R where F is applied to a distance R from center
F R = 1/2 M R^2 α
M = 2 F / (R α) = 2 * 50 / (.15 * 110) = 6.06 kg
A tank contains compressed air at 5 ATM. What is the pressure in pascals?
Answer:
1 atm = 1.01E5 nt/m^2 = 1.01E5 pascals
5.05E5 nt/m^2 = 5.05E5 pascals
1 pascal = 1 nt/m^2
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an airplane's speed at the time of landing is 90 m/s. ten seconds later it had a speed of 30 m/s. what was the acceleration of the airplane?
Answer:
-6 m/s^2
Explanation:
30 - 90 = -60
-60 / 10 = -6
If acceleration was constant, it will be -6 m/s^2
