Answer:it’s c :)
Explanation:
Answer:
the electric force decreases because the distance has an indirect relationship to the force
Explanation:
At what point in a waterfall, do the drops of water contain the most gravitational potential energy?
Answer:
The water above receives energy as it falls down the short waterfall. This energy was stored as potential energy in the gravitational field of the Earth and came out of storage as the water dropped. This energy which came out of the gravitational field ended up being expressed as the kinetic energy of the water. That is, the water gains kinetic energy as it drops. An ounce of water is going faster when it hits the bottom of the waterfall than it was when it went over the top of the waterfall
Explanation:
The drops of water contain the most gravitational potential energy at the top before they start falling.
At the top of the waterfall
GravitationAt the top of the waterfall, the water drops have the most gravitational potential energy before they start falling as the water at the peak of the waterfall is higher in the Earth's gravitational field and has gravitational potential energy. The potential energy is converted to kinetic energy when it falls. As a result, energy is not created; it was always there, stored as potential energy.
Potential energy is energy that is stored and is determined by the relative positions of various pieces of a system. Kinetic energy is the energy that an item or particle has as a result of its movement.
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What is the velocity of a wave that has a frequency of 400 Hz and a wavelength of 0.5 meters?
Answer:
4.2
Explanation:
A solar flare is a very high energy event on the surface of the sun. Which wavelength is best to observe such an event?
- visible light
-microwaves
-xray
-infrared
Any two differences between SI units and derived units
help me...
Answer:
SI unit
1) SI unit does not depend on other.
2) they have their own identity.
Derived unit
1) They depend upon other or fundamental unit.
2) they don't have their own identity.
A steady increase in global temperature has been recorded between 1900 and today. Before concluding that this rise in temperature is the result of the increased burning of fossil fuels since that sametime, which of the following questions would have to be answered? *
A. What is the CO2 content in one metric ton of fossil fuels?
B. Which gases are released when burning fossil fuels?
C. What, if any, temperature rise was occurring prior to 1900?
D. None of these
Answer:
C is correct
Explanation:
A TV draws 0.867 A of current when connected to a 122 V outlet. It’s resistance is 140.71.
A.)How many electrons pass through the TV per minute?
B.)How much electrical energy does the TV convert to other forms of energy
per minute?
Answer:
Explanation:
current measures charge flowing per second .
A current of .867 A means charge of .867 coulomb is flowing per second
charge flowing per minute = .867 x 60
= 52.02 coulomb
one electrons carries a charge of 1.6 x 10⁻¹⁹ Coulomb
So no of charge flowing per minute
= 52.02 / 1.6 x 10⁻¹⁹
= 32.5 x 10¹⁹ .
B )
electrical energy consumed per minute
= V X I X t , V is volt , I is current and t is time .
= 122 x .867 x 60
= 6346.44 J .
An electric field around two charged objects is shown.
Two spheres next to each other. Vectors perpendicular to each surface spread out and go to the other charge. The vectors are from the charge on the left, labeled X, and to the other charge, labeled Y. The vectors on the opposite sides of the charges are not bent.
What are the charges of objects X and Y?
Answer: D
X: positive
Y: negative
Explanation:
It's either A or D and I chose A and got it wrong.
Answer:
D) Y and Z are opposite charges, but their identities cannot be determined.
Explanation:
i got it right
When a current flows through a light bulb, it emits 30 J light energy in 2 seconds, What is the power of the bulb?
The power of the light bulb is 15 watts.
What is power ?Power in physics is defined as the rate of energy per unit time or in other words the work done by any electrical appliance per unit time. Power is expressed as -
P = E/T where E is Energy and T is the time period.
How to calculate the value of power in the question ?Given that the light bulb emits 30 J light energy in 2 seconds.
We have E = 30J and T = 2 seconds.
Therefore power(P) = Energy(E) / Time(T)
∴ P = 30 / 2 = 15 watts
Thus the power of the light bulb is 15 watts.
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Which two gases in the atmosphere are essential to life on Earth? *
Nitrogen and Helium
Oxygen and Carbon Dioxide
Neon and Argon
Hydrogen and Helium
Answer:
Explanation:
Oxygen and carbon dioxide
How much net force is needed to accelerate a 3 kilogram skateboard at 5 m/s2 this last on is a exponent use this formula net force = mass x acceleration Will MARK BRAINLLIEST
Answer:
15 N
Explanation:
ASAP PLEASE!!
When tectonic plates are strained to the point that they can no longer bend, which of the following is most likely to occur?
A. Earthquake
B. Volcanic Eruption
C. Convection Current
D. Ocean Basin Formation
In a landfill, old biodegradable materials are breaking down while at the same time, new trash is being added daily. Which statement describes the relationship between a landfill and the mass of the Earth?
A.) The mass of the Earth increases and decreases depending on the amount of trash added to the landfill.
B.) The mass of the Earth decreases due to materials breaking down in the landfill.
C.) The mass of the Earth increases due to trash being added to the landfill.
D.) The mass of the Earth remains the same regardless of the amount of trash in the landfill.
Answer:
Ok, first, what is trash?
Trash can be different things, like organic stuff (remains of fruit or wood) or not-organic (like plastic)
Naturally, those things come from Earth, meaning that that:
The fruit is on Earth.
Someone eats the fruit
the rest is trowed in the trash
the trash is returned to some location on the Earth.
So the mass of the fruit is always in the Earth, this means that the mass of the Earth does not change by this process.
Now in the process of materials breaking down, those materials are being "absorbed" by the land, so the mass remains on the planet, this process also does not change the mass of the Earth.
D.) The mass of the Earth remains the same regardless of the amount of trash in the landfill.
When a ball is tossed upward, along the way
A. the amount of kinetic energy and the amount of potential energy change
B. all of its energy is lost to friction with the air, and both kinetic and potential energy are zero at the highest point of travel.
C. its potential energy decreases and reaches zero at the highest point of travel D. its total energy increases and is at a maximum at the highest point of travel
Answer:
A
Explanation:
going upward, kinetic energy decrease and potential energy increase
Answer:
A
Explanation:
As a ball is thrown into the sky, potential energy increases and kinetic energy decreases. But, the mechanical energy ( that is the sum of the potential and kinetic energy) remains the same....
When an atom in a reactant loses electrons, what happens to its oxidation number?
A. Its oxidation number decreases
B. Its oxidation number doubles.
C.Its oxidation number increases.
D.Its oxidation number increases by one.
E. Its oxidation number stays the same.
ASAP if you answer right I will mark brainiest....
Answer: *The inner planet that has two moons is Mars * the only planet in the Solar System with clockwise rotation is Venus * The surface of Mercury is covered with ancient magma ( which is similar to the spews of volcanoes on Earth as well) * The planet that is closest to Earth is Mercury * Venus has more volcanoes than any other planet * Earth's moon formed when a(n) can sometimes be called the Big Splash or can be called the Theia impact (Luna the moon formed from the ejecta of the collision between the Proto- Earth and Mars sized planet) * Mars is called the red planet because it's soil contains the element iron oxide ( which is the compound that gives blood and rust hue)
Explanation: Hope this helped :)
Somebody can tell me what answers it is?
Answer:
D
Explanation:
The color you see is the color the object reflectes. The rest of the color are absorbed by that object.
Which electromagnetic radiation can be seen with the human eye?
ultraviolet rays and visible light
infrared rays, visible light, and ultraviolet rays
visible light
visible light and X-rays
Answer:
Visible light
Explanation:
Answer:
C visible light
Explanation:
Which of these forces pull or push upward, and which pull or push downward? Explain.
Answer:
A force is a push or pull that acts upon an object as a result of that objects interactions
Explanation:
3. If you increase the distance between
two objects, the gravitational force
between the two objects
A)increases
B)decreases
Answer:
B
Explanation:
height of the image formed by a lens is-2cm.0what is the nature of the image?
Answer:
As the height is negative , image is inverted. This means it is inverted and real
A flowerpot that has a mass of 1.5 kg is sitting on a windowsill 30 meters from the ground. Is the energy of the flowerpot potential of kinetic?
How much energy does the flowerpot have?
Answer:
Potential energy
441 joules
Explanation:
The flower pot is not moving so it does not have kinetic energy. Anything that is still and a distance from the ground does have potential energy.
Amount of energy: p=mggh
p=1.5(9.8)(30)=441 joules
The flower pot's energy is measured in potential energy since it is remaining stationary and the energy is stored, the flowerpot is not moving about so it is not kinetic energy.
The formula for potential energy is:
GPE = mgh
The m stands more mass, the g stands for gravitational energy (9.8m/s^2) and the h stands for height.
Our values for the following terms are:
M = 1.5kg
G = 9.8m/s^2
H = 30 meters
Now, we can plug it into our formula to solve for the amount of potential energy.
GPE = 1.5(9.8)(30)
First, let's multiply the gravitational energy and the height.
30 x 9.8 = 294
Then, multiply the mass by the result.
1.5 x 294 = 441
Therefore, the potential energy of the flowerpot is 441J.
discharge occurs when oppositely charged objects get close enough for the air between them to become electrically charged.
Answer:
It does both. Once they get close enough the air does start to get charged, but then they eventually discharge when they touch.
Explanation:
(05.03 MC)
The color of four stars is shown in the table below.
Color of Stars
Star Color
W Yellow
X White
Y Blue
Z Orange
What is the correct order of the surface temperature of the stars, starting from the highest to the lowest?
Group of answer choices
Y, Z, W, X
X, W, Z, Y
Y, X, W, Z
Z, W, X, Y
Answer:
C is correct
Explanation:
The order of the surface temperature of the stars, starting from the highest to the lowest is Y > X > W > Z.
What is Wien's displacement law ?Wien's displacement law states that, the black-body radiation curve for different temperatures will have different peaks of wavelengths and the wavelength is inversely proportional to the surface temperature.
Here,
According to Wien's displacement law,
The wavelength of the star is inversely proportional to its surface temperature.
λ [tex]\alpha[/tex] 1/T
where T is the surface temperature.
Therefore, the star with lowest wavelength will have the highest surface temperature.
Consider the wavelengths of each stars given,
The increasing order of their wavelengths can be written as,
λ(Orange) > λ(Yellow) > λ(White) > λ(Blue)
Therefore the increasing order of their surface temperatures will be,
T(Blue) > T(White) > T(Yellow) > T(Orange)
Hence,
The order of the surface temperature of the stars, starting from the highest to the lowest is Y > X > W > Z.
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A flowerpot that has a mass of 1.5 kg is sitting on a windowsill 30 meters from the ground. Is the energy of the flowerpot potential of kinetic?
How much energy does the flowerpot have?
Answer:
It is Potential and corresponding to
90
J
.
Explanation:
Potential Energy is energy stored in the system and ready (potentially) to be changed into, say, Kinetic Energy through movement.
The general expression for Gravitational Potential Energy is:
U=mgh
where:
mg is the weight; h is the height relative to a certain reference level (the ground in this case) choosen to have zero Potential Energy.
With your data we get:
U=3⋅30=90J
Which equation is balanced?
H2+ O2 + H2O + O2
H2+ O2 + H2O
2H2 + O2 + 2H2O
4H2 + O2 + H2O +O
Answer:
2H2+O2➡️2H2O is balanced. I think.
how does force do positive work on an object?
Answer:
It can do work on an object by moving it or changing it.
Explanation:
Brainliest?
Answer:
If you push on an object, thats positive work but if you pull on the object, thats negative work
Explanation:
A 100 kg bag of sand has a weight on 100 N. When dropped its acceleration is what?
Answer:
The acceleration of the bag of sand is [tex]1\ m/s^2[/tex].
Explanation:
We have,
Mass of a bag of sand is 100 kg
Weight of the bag of sand is 100 N
It is required to find the acceleration of the bag when it is dropped. The weight of an object is given by :
[tex]F =ma[/tex]
When it is dropped, a = g
[tex]g=\dfrac{F}{m}\\\\g=\dfrac{100}{100}\\\\g=1\ m/s^2[/tex]
So, the acceleration of the bag of sand is [tex]1\ m/s^2[/tex].
Who is this and why is she in my album??? lol help
Dinesh wants to launch a package over the garden wall to his friend on the other side. His plan is to set up a see-saw, put the package on one end and jump on the other end. Dinesh determines that he will land on the board with a force of 1,127 newtons, and the package weighs 322 newtons. The board he is going to use for the see-saw is 9 meters long. How close to the end of the board should Dinesh put the fulcrum?
Answer:
Dinesh should put the fulcrum 2 m from himself and 7 m from the package.
Explanation:
Let the fulcrum be x meters from Dinesh's end.
The sum of clockwise moment must balance the sum of anti-clockwise moment.
Taking a moment about the fulcrum
(Force exerted by Dinesh) × (Distance of Dinesh from the fulcrum) = (Weight of the package) × (Distance of the package from the fulcrum)
Force exerted by Dinesh = 1127 N
Distance of Dinesh from the fulcrum = x m
Weight of the package = 322 N
Distance of the package from the fulcrum = (9 - x) m
1127 × x = 322 (9 - x)
1127x = 2,898 - 322x
1127x + 322x = 2,898
1449x = 2898
x = (2898/1449) = 2 m
Hence, Dinesh should put the fulcrum 2 m from himself and 7 m from the package.
Hope this Helps!!!
The force of the collisions of gas particles with other particles
of matter is known as
Answer:
Kinetic molecular
Explanation:
