Which of the following is the best evidence that work has been done on or by an object?
Answers
The change in the energy of an object is the best evidence that work has been done on or by an object. Thus, the correct option is A.
What is Work done?
Work is done on an object or by an object whenever a force is applied on the object that moves it over a certain distance or change the energy of the object. This movement is a result of energy change.
We can calculate the energy transferred to an object, or the work done, by simply using the formula where we multiply the force by the distance moved in the direction of the force applied.
Therefore, Energy transferred = work done = force × distance moved in the direction of the force.
W = f × d
Therefore, the correct option is A.
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Related Questions
The spring in a toy rocket launcher has a spring constant of 13 N/m. How far must you compress the spring to cause it to exert a force of 2.5 N?
Answers
Answer:
Distance, x = 0.19 meters
Explanation:
It is given that,
Spring constant of the toy rocket, k = 13 N/m
Force applied on the spring, F = 2.5 N
We have to find the spring constant of the spring. It can be calculated using Hooke's law as :
F = - kx
[tex]x=\dfrac{F}{k}[/tex]
[tex]x=\dfrac{2.5\ N}{13\ N/m}[/tex]
x = 0.19 meters
Hence, the spring must be compress to cause it to exert a force of 2.5 N.
A ski lift carries people along a 220-meter cable up the side of a mountain. Riders are lifted a total of 110 meters in elevation. What is the idea mechanical advantage of the ski lift?
Answers
The Ideal Mechanical Advantage (IMA) of the ski lift is 2. It is calculated by dividing the total length of the lift cable by the total change in elevation.
Explanation:The question is asking about the Ideal Mechanical Advantage (IMA) of a ski lift. The IMA is determined by the ratio of the distance over which the input force is applied to the distance over which the output force is applied.
In the case of a ski lift, the input force is applied over the entire length of the cable, while the output force is applied over the change in elevation. Therefore, the IMA of the ski lift would be the total length of the cable (220 meters) divided by the total change in elevation (110 meters), giving an IMA of 2.
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An embryo created by male-female reproduction has traits from _____.
A.the male only
B.the female only
C.both the male and the female
Please help I will mark as most brainliest
Answers
Hope this helped!
PLEASE PLEASE HELPP
Which of the following describes how the Mid-Atlantic Ridge formed on Earth at a divergent plate boundary?
Plates moved in closer
Plates slid past each other
Plates moved with each other in the same direction
Plates moved apart
Answers
The part of the element that defines it is the element's number of ____.
Please answer quickly!
Answers
Read the scientific question below.
"Do fertilizers make plants grow faster?"
What is a likely hypothesis for the question?
Yes, fertilizers make plants grow faster.
No, water and sunlight make the plants grow faster.
If we fertilize a plant, then its height increases faster.
If we add fertilizers to the soil, then there will be nutrients in the soil.
Answers
A likely hypothesis to the question "Do fertilizers make plants grow faster?" is: If we fertilize a plant, then its height increases faster.
A hypothesis is a supposition made from data that is the basis for an investigation. The hypothesis formulates the central question of the investigation in an affirmative way. In this case, the affirmation that is the most similar to the question is If we fertilize a plant, then its height increases faster.
Also, a hypothesis should be written in a way that it can be proved through an experiment. In this case, an experiment can be designed from the hypothesis, measuring the height of the plants when adding fertilizer and when not, to test the hypothesis. This is called falsifiability.
Have a nice day!
Answer:
It is c:if we fertilize a plant, then its height increases faster.
Explanation:
Got it right on the test
In the food web shown above, which of the following organisms can be classified as a tertiary consumer?
A.
puffin
B.
jellyfish
C.
krill
D.
eiders
link:https://app106.studyisland.com/pics/200922foodweb.jpg
Answers
Here is your answer:
The proper answer to this question is option A "puffin".
Your answer is A.
If you need anymore help feel free to ask me!
Hope this helps!
a bat experts a 120 N force on a 0.134 kg baseball for 0.04 seconds. what impolse is excerted on the bat
Answers
[tex]I = F \Delta t[/tex]
In our problem, we have a force of 120 N: F=120 N, applied to the baseball for a time of [tex]\Delta t=0.04 s[/tex]. Therefore the impulse is
[tex]I=F \Delta t = (120 N)(0.04 s)=4.8 Ns[/tex]
Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from air through a diamond.
Answers
Hope I helped!
~Mathlete12321
With the density given, the thing that'll happen to the light ray is that the diamond would act like a prism, or the light would break up and disappear.
What is density?Density simply means the degree of compactness of a substance. It's the degree of consistency meaured.
Diamonds are a very dense material. The thing that would happen to the light ray if you projected it from air through a diamond is that the light will disappear.
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A spaceship orbiting earth flies to the moon. How is the gravitational force pulling on the spaceship related to the distance that the spaceship is from the earth? As the distance from the earth decreases, the gravitational pull on the spaceship would decrease. The gravitational pull of the earth is constant and therefore the gravitational pull on would not change. There is no gravity on the moon and therefore only the earth will exert gravitational force on the spaceship. As the distance from the earth increases, the gravitational pull on the spaceship would decrease.
Answers
In fact, the gravitational force (attractive) exerted by the Earth on the spaceship is given by
[tex]F=G \frac{Mm}{d^2} [/tex]
where G is the gravitational constant, M the Earth's mass, m the mass of the spaceship and d the distance of the spaceship from the Earth. As we can see from the formula, as the distance d between the spaceship and the Earth increases, the gravitational force F decreases, so answer D) is the correct one.
According to the Academic Honesty Policy, plagiarism is ______.
Answers
The metric unit of measurement for force is the _____.
pound
Newton
foot-pound
Newton-meter
Answers
The power of imagination helps a scientist to propose valid scientific explanations about the solar system use biased methods to answer questions about the solar system pose questions about the solar system which are not reasonable create theories about the solar system which are not acceptable
Answers
The power of imagination is integral to proposing scientific theories, particularly in the study of the solar system; however, these theories must be tested against experimental data to be accepted. Kepler's imaginative approach led to the formulation of laws that underpin our understanding of planetary motion, highlighting the scientific method's reliance on creativity tempered by empirical validation.
The power of imagination plays a crucial role in the scientific method, especially when it comes to understanding the solar system. Scientists use their creativity to construct theoretical models of how the universe could function and then perform experiments to see which models hold. For example, the work of Johann Kepler, who proposed the laws of planetary motion, showcases how imaginative concepts can lead to significant scientific advancements. While Kepler's models were initially based on mystical ideas, they eventually contributed to our modern understanding of celestial dynamics. Thus, the imaginative component of science allows for the proposal of new and sometimes revolutionary theories, but ultimately, it's through experimentation and data that these theories are validated or refuted.
Science thrives on new ideas and is always ready to assess the validity of different models and theories through careful experimentation. As new data come to light, scientists continuously refine their theories to reflect the most accurate understanding of the natural world. This process illustrates the dynamic and adaptive nature of scientific inquiry, which values empirical evidence overall.
In a pulley setup that has a moving pulley, __________.
A.) you have to pull the string a greater distance, but the force needed to lift the mass is cut in half
B.)you have to pull the string a greater distance, and it takes more work to lift the mass
C.) you don't have to pull very much to lift the mass
D.)your work doubles because the pulley moves
Answers
Thus the same amount of work is required to lift the same load the same distance between pulley setups with or without a moving pulley.
Kip shoots a basketball from the three-point line and wins the game for his team. Which of the following is the reaction force? Kip's arm moving, the basketball moving into the basket, or winning the game?
Answers
Answer:
the basketball moving into the basket is the correct answer
Explanation:
From inside to out, describe the components of an atom. What makes one element's atoms differ from another element's atoms?
Answers
How do atoms differ from eachother?- their atoms might have different elections, neutrons, and/ or protons inside of it. Plus the location of the elections might be different too.
Answer:
This is the answer bro
Explanation:
Normally, the number of electrons is equal to the number of protons, which makes atoms electrically neutral. The number of protons in an atom is the defining feature of an atom. It's what makes one element different from another. The number of protons in an atom is called its atomic number.
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the small wobble in the orbit of Neptune helped astronomers discover Pluto. this suggests that this wobble was MOST LIKELY caused by A) fusion B) gravity C) friction D) magnetic attraction
Answers
The small wobble in the orbit of Neptune helped astronomers discover Pluto. This suggests that this wobble was MOST LIKELY caused by
A) fusion. x
B) gravity. correct
C) friction. x
D) magnetic attraction. x
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A car has a mass of 1000 kg and is moving with a velocity of 10 meters/second. What is the momentum of the car?
Answers
1000*10= 10,000
The momentum of the car is 10,000
Which is an action that can cause an object to move or change its state of motion
Answers
FORCE is the answer
:P
Which of the following astronomical bodies or collection of astronomical bodies is likely to be a part of the others listed?
Milky Way
Solar system
Sun
Universe
I just don't understand the question and if you do please explain. If it had to be one, I'd pick sun.
Answers
Explanation:
Sun is the only star in our solar system, and planets orbit around it. Our solar system is the part of Milky way (located in one of the outer bands of the Milky way), and the Milky way is the part of the Universe (Universe is made up of billions of galaxies, and Milky way is one of those galaxies). Hence, in the given options, the Sun is the part of all of the other options given.
Answer:
SUNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
The waves that have shorter wavelengths than visible light are: (check all that apply)
Radio Stations
Ultraviolet Waves
Gamma Rays
Microwaves
Answers
Gamma rays
------------------
The waves that have shorter wavelengths than visible light are gamma rays and UV rays. Microwaves and radio waves are longer waves than visible light.
What is electromagnetic spectrum ?The electromagnetic spectrum is the arrangement of waves in the order increasing frequency or decreasing wavelength. The order of the spectra starts from radio waves, microwaves, infrared, visible light, ultraviolet, x -rays and gamma rays.
The visible light that we can see is in between IR and UV rays. Hence, visible light has a frequency greater than IR rays but shorter than IR. Similarly visible light is longer than UV- rays but less frequency than UV rays.
Gamma rays are the most energetic and shorter waves in the electromagnetic spectrum with smaller wavelength and greater frequency. Hence, options b and c are correct.
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In this lab, you will use a magnet and a simple circuit to examine the concepts of electricity and magnetism. Think about how these ideas can be shown experimentally. In the space below, write a scientific question to address by doing this experiment.
Answers
Sample Response: How can magnetic and electric fields be demonstrated?
Electromagnetism is defined as the branch of physics, in which interaction between electric and magnetic fields is studied.
In the presence of a magnetic field, the electrons move and produce an electric current. The experiment in which electromagnetism can be shown in the making of an electromagnet.
The electromagnet is a type of magnet, in which a magnetic field is generated due to the presence of electric current.
The experiment in which magnet and simple circuit can examine the concepts of electricity and magnets is making of an electromagnet.
To perform the experiment, the things required are:
copper wire, battery, iron nail, and other small magnetic things.
Steps for conducting the experiments include:
The copper wire should be wrapped around the iron nail. The one end of the wire should be loose. The wire should form the coil-like structure on the nail. The plastic coating of the wire from the loose ends should be removed. The uncoated wires should be attached to the different terminals of the battery. Now, the iron nail should be placed near the small magnetic objects. Thus, the magnetic objects will be attracted to the iron nail, explaining the phenomenon of the electromagnetism. In the presence of electric fields, the iron nail can be treated as an electromagnet.Question:
How does the electric field propagate through the magnetic field?
Therefore, electromagnets are the classic demonstration of electric and magnetic fields working together.
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during sublimation particles in a solid room deodorizer move directly into the air as a gas how does the movement of the deodorizer particles change? the particles ___.
A) move fast enough that the attraction between particles is overcome completely
B) Lose enough energy that the movement completely stops
C) Move slowly enough that strong attractions form, pulling the particles together
D) Are only able to slip and slide past each other
Answers
Answer: Option (A) is the correct answer.
Explanation:
Sublimation is a process in which molecules of a solid substance are converted directly into gaseous phase without undergoing liquid phase.
This is because solid particles absorb the heat from their surroundings due to which bond between the molecules are broken down. As a result, molecules gain kinetic energy and they move rapidly into the atmosphere.
Thus, we can conclude that in the given situation the particles move fast enough that the attraction between particles is overcome completely.
a plane takes off at 34 m/s if it accelerates from rest and takes 7.2 seconds to lift off find the acceleration
Answers
Which stars have the lowest absolute brightness?
Supergiants
Giants
Yellow stars
Dwarfs
Answers
Answer:
DWARFS
Explanation:
Answer:
Dwarfs
Explanation:
I got it right on my test :)
Hope this helped!~
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These four surfaces are opaque; that is they reflect or absorb certain rays of light determine the color
Of each surface based on the diagrams
Answers
Similarly, in the second figure, the surface absorbs all colors except for blue, and so the surface will appear blue to our eyes.
In the third figure, the surface absorbs all colors, so it will appear black to our eyes (because no colors are reflected, and black=absence of colors).
In the fourth figure, all colors are reflected: this means the surface will appear white to our eyes (white= sum of all colors).
Which of the following explains how heat flow within Earth changes its surface?
Molten material moves in one direction, moving the plates in the opposite direction
Molten material moves in one direction, moving the plates in the same direction
Cyclical movement of molten material moves plates in different directions
Cyclical movement of molten material moves all plates in one direction
Answers
These continuous convection currents cause the crustal plates to converge, diverge or slide past each other in opposite directions.
Answer:
C
Explanation:
just trust me
What is an atom? what are electrons,protons,and neutrons?
Answers
The formula for calculating work is ___.
force divided by distance
force multiplied by distance
power divided by time
distance multiplied by time
Answers
Formula for calculating work = Force × distance
Work done = Force applied on the object × distance travelled by it.
Hope it helps...!!!
The formula for calculating work is force multiplied by distance; that is the second option, as work is a measure of the energy transferred to or from an object and is calculated by multiplying the force with distance.
What is the work done by an object?Work is a physical concept that describes the energy transferred when a force is applied to an object and is caused to move a certain distance and work is said to be done which can be positive, negative, or zero, depending on the direction and magnitude of the force. The formula expresses the fact that the amount of work done on an object depends on both the magnitude of the force applied and the distance, and is written as W = F x d.
Hence, the formula for calculating work is force multiplied by distance; that is the second option.
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Which magnetic property best describes a magnet’s ability to act at a distance?