To obtain the same resistance force, a greater force must be exerted in a machine of lower efficiency than in a machine
of higher efficiency
True
False
Answers
Answer: True.
Explanation:
A resistance force is also known as friction. And the efficiency of a machine is affected by friction.
A machine of lower efficiency has higher magnitude of friction than a machine of higher efficiency.
Therefore, To obtain the same resistance force, a greater force must be exerted in a machine of lower efficiency than in a machine of higher efficiency. This is true
Related Questions
Give one example when it might be important to know how much gravitational potential energy is stored by an object. Why is it important?
Answers
Answer:
A possible situation in knowing the gravitational potential energy of an object is to find it's maximum kinetic energy. It can be important if I would want to calculate the velocity the object will be having if the potential gravitational energy will be converted into kinetic by using the formula.
Which is this the correct variable for the equation "____= displacement divided by time"?
velocity
speed
acceleration
Answers
The correct variable for the equation is velocity = displacement divided by time .
The distance traveled divided by the time passed is the definition of an object's average speed. Average velocity can be calculated as the displacement divided by the time. Velocity is a vector quantity.The vector quantity velocity (v), denoted by the equation v = s/t, quantifies displacement (or change in position, s), over change in time (t).What is the connection between time and velocity displacement?Time and distance are both factors in velocity. The pace at which an object changes its position is known as its velocity. Displacement / Time = VelocityThe change in velocity divided by the change in time is the definition of acceleration.
Learn more about connection between time and velocity displacement
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Answer:velociy :)
Explanation:
Lab Report
Motion and Forces
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U4_ Lab_MotionAndForces_Alice_Jones.doc).
Introduction
What was the purpose purpose of the experiment?
The purpose of the experiment is to test the hypothesis.
What were the independent, dependent, and control variables in your investigation? Describe the variables for each part of the experiment.
Write a hypothesis based on observations and scientific principles.
Type your answer here:
Experimental Methods
What tools did you use to collect your data?
Questionnaires and observations.
Write your procedure. List each step so that another student could follow the procedure and repeat your experiment.
Type your answer here:
Data and Observations
Record your observations.
Type your answer here:
Conclusions
What conclusions can you draw about how the sum of forces acting on an object affect its motion? Write an evidence-based claim.
Type your answer here:
Which mass, A, B, or C, was the greatest? Use the observations from your experiment and your knowledge of Newton’s laws of motion to write an evidence-based claim.
Type your answer here:
Make a model that shows the forces acting on two blocks on a flat, frictionless surface:
A 1 N block at rest
A 1 N block with 2 N of force applied in one horizontal direction
Include arrows to represent the forces and labels to indicate the magnitude of each force. Use your model to compare and explain the motion of each block.
Type your answer here:
Answers
Answer's C
Explanation: The matter that surrounding this whole planet or time and frequencies the motion and forces that people can't determine unless made a hypothesis
Is this right?
Meryl is making a collage of pictures for her science class. On one-half of a piece of poster board, she is attaching pictures of the result of adding heat to materials. On the other side of the poster, she is attaching pictures of the result for removing heat from materials. Which of the following pictures should be placed on the side of heat being removed from the material?
a frozen popsicle
baked cupcakes
steam from a pot
melted candy bar
Answers
Answer: It's kind of a subjective question by saying Which of the following pictures should be placed on the side of heat being removed from the material?
Explanation: I'm not entirely sure about this but I would think that it would be baked cupcakes because they had to undergo heat to become "baked", so they are the result of heat.
(NO LINKS) A carpenter strikes a nail with a hammer, pushing it into wood.
What are the forces in the force pair for this example?
A. the force applied by the nail on the wood
the force applied by the hammer on the carpenter
B. the force applied by the nail on the wood
the force applied by the nail on the hammer
C. the force applied by the hammer on the nail
the force applied by the hammer on the carpenter
D. the force applied by the hammer on the nail
the force applied by the nail on the hammer
Answers
Answer:
The force applied by the hammer on the nail the force applied by the nail on the hammerWhat are the positive and negative effects of the mountain-climbing trade on the local environment and economy? 3-5 sentences, please thx
Answers
Which direction will a magnet point, if it is suspended in space by an astronaut? Please explain...
Answers
the gold bar and the gold nuggets both contain pure gold. how many types of atoms do these objects contain?
Answers
Answer:
it a 11 types
if atom that in gold
Explanation:
Pluto's orbit brings it inside the orbit of _____.
Neptune
Saturn
Venus
Uranus
Answers
Answer:
Pluto's orbit brings it inside the orbit of Neptune.
Pls can someone help
Answers
Answer:
ITS THE LAST ONE(4TH), I THINK
Explanation:
Answer:
The answer is Diagram 2(top right) and Diagram 4(bottom right)
Explanation:
In a magnet, the magnetic field will always move from North to South.
North will give out magnetic field and South will receive it.
IF YOU GET GOOD GRADES ON SCIENCE TESTS PLEASE HELP ME!!!!!
The student develop the model above ( its really below) . usually the model, identify two potential wave phenomena that occur and are the reason behind why the student can only hear the train in front of the apartment complex.
A. the train can be heard more easily in front of the apartment complex because of reflection and interference. as the sound comes from train, the sound waves reflect off of the complex and interfere with each other increasing amplitude of the wave to make it easier.
B.the train can not be heard ad easily in the park because of reflection and diffraction. the sound reflects off of the trees in the park and diffract between the tree, this causes the waves to bend too much to be heard.
C.the train can be heard more easily in front of the apartment complex because of diffraction and refraction. the sound waves diffract between the other buildings aiming them towards the apartment complex and then the sound refracts through the apartment complex which makes it more difficult to hear in the park.
D.the train can not be heard as easily in the park because of interference and reflection. the other buildings in front of the park cause interference of the sound waves from the train and the trees in the park cause reflection making it too hard to hear the train.
(please be 100% sure about your answer)
Answers
Answer:
it is 21
Explanation:
Now use the temperature change simulation to carry out your experiment. Record your data, as well as any necessary calculations, in the table. You can modify the table, if necessary, so it matches your experimental procedure.
Answers
Answer: Unable to answer.
Explanation: If you link the simulation, I can answer it for you.
What is it called when wavelengths spread out by passing through an object such as a prism?
A)dispersion
B)refraction
C)reflection
D)absorption
Answers
Your science teacher has provided the following materials to investigate the factors that affect the strength of electric and magnetic forces.
• large iron nail – 5 mm diameter
• 100 cm of thinly wrapped copper wire
• D battery
• electrical tape
• wire strip
• thumb tacks -assorted sizes
• paperclips – assorted sizes
Design an investigation you could carry out to determine the factors that affect the strength of electrical and magnetic forces.
Answers
The strength of the electric field can be estimated as force per electric charge, whereas the strength of a magnetic field depends on the force of electrons and velocity.
Whta is a magnetic field?A magnetic field can be defined as magnetic work exerted on electric charges that are in motion (movement).
Conversely, an electric field is an area where an electric current is applied and electron force can be estimated per Volts per Meter.
In conclusion, the strength of the electric field can be estimated as force per electric charge, whereas the strength of a magnetic field depends on the force of electrons and velocity.
Learn more about magnetic fields here:
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It’s 11:53pm right now and I have just this assignment left to do for this class, I need this assignment done so I don’t fail this class, can I get some help please, I will literally give you brainliest if I get full and correct answers I just need to finish this now and I’m exhuasted, watching the video for it would just make me too tired to stay awke thank you
Answers
Answer:
Explanation:
1 matter
2 the chain / air pressure
3 gravity
4 in the cup
5 inertia
6 pushed or pulled
7 rest
8 motion
9 mass
10 reaction
11 b
12 a
13 grams
14 listen to the song
2. Gravity
3. Gravity
7. rest
8. motion
9. Mass times acceleration
11. A
12. B
13. Grams
14. Connected
That’s all I got sorry
Please select the word from the list that best fits the definition
Gives a pictorial indication of how far and fast an object has moved
a. speed
b. velocity
c. frame of reference
Answers
Answer: the answer is C
Explanation:
hope it helps friend :)
Why is rock away from ocean ridges older? Is it because if the rocks are away from cracks in the crust, there is no way for any new rocks to form?
Answers
Answer:
the rocks are away from cracks in the crust
Explanation:
The new crust is pushed away from the Ocean Ridge in both directions as newer crust is formed. This is called sea floor spreading. The crust that makes up the sea floor starts to have time to accumulate a layer of sediments as it gets older and moves away from the Ocean Ridge.
Answer:
yea i think so
Explanation:
What two ways of thinking helped scientists to disprove the idea of supernatural forces?
Answers
Answer:
Answer in Explanation
Explanation:
ask questions to discover new information about natural phenomena. conduct inquiries (or ask questions) to discover what happened. make observations through scientific inquiry. make observations through surveillance.
Answer:ummm i am not to sure nvrm
Explanation:
How does the agricultural activity most likely affect the surface water of the area?
Answers
Answer:
Agriculture has been the cause of significant modification of landscapes throughout the world. Tillage of land changes the infiltration and runoff characteristics of the land surface, which affects recharge to ground water, delivery of water and sediment to surface-water bodies, and evapotranspiration.
Explanation:
PLZ HELP DUE TODAY ! ! ! ! A student built the following circuit from a diagram. What can the student do to make this a complete scientific investigation?
The student can complete the same experiment outside.
The student can try completing the experiment in the dark.
The student can use completely new materials and do a different experiment.
The student can change the size of the battery and see what happens.
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!
2+2 can someone plz tell me the pros and cons of ending life right here and now?
Brainliest if ur on my friends list!
Answers
Answer:
4
Explanation:
Well the cons are if you end your life rn then like you are kinda afk from life.. I dunno I'm a gamer so like if you die then there is no coming back u know.... ooooooooooooff I dunno what to say
And the pros are just don't do it, actual help is hard to find but like if you were to try and start over you could possibly also don't do that to who ever has to clean up the bloody mess. Coroners don't like getting hung bodies down and janitors don't like cleaning up blood. :) Find someone who loves you more than you do for yourself that will help a lot. Find a thing you like doing it helps too. Disappear for a day or two.
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
Write a report on waves. Some questions you might consider are: What makes a wave? Why are some waves small and some large? How are waves classified? Are there different kinds of waves? What happens when a wave meets the shore? Where in the world do you find the best waves for surfing?
Answers
Answer:
The waves have energy that wave back and forth because the waves are never still, they are always moving. There are different types of waves because sometimes (like a tsunami) the waves are affected by other things like the earth plates. Portugal is one of the best places to surf because they have waves that can reach up to 6 to 15 feet high!
Explanation:
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.
What do you have to do to become faster at running?
Answers
Answer: Get stronger. Strength is critical to running fast because the more force you can exert against the ground the faster you can run.
Apply your new strength. Being strong is important for sprinting, but the ability to apply it is even more important. Sprinters move in a horizontal direction.
Take longer steps more quickly. Today, the concept of exerting more force against the ground is very popular for improving speed. ...
Run fast to get fast. Of all the strategies described in this article, this is the most important and often the most overlooked.
Explanation:
Answer:
i sa train as much as possible
Explanation:
that's why im a track star
1. Was your hypothesis correct? Why or why not?
2. Use the experiment to explain what density is. How is it different from weight and mass?
3. Why do some objects with a greater mass float and some objects with less mass sink?
4. As a scientist, you have been tasked with building a boat. Your first prototype sinks. What can you do to make it float?
5. What did you learn from this lab?
Answers
Answer:
brueijrhrhejehrrujdueiie
Answer:
brody if a teacher sees this you are literally doomed lol u got ur name on one of the tabs
Explanation:
A truck accelerates on a highway from rest to 216 m/s in 10s. What is the magnitude of acceleration?
Answers
Explanation:
acceleration is the change in velocity per time taken
a = ∆v/t.
a = (216 - 0)/10
a = 216/10
a = 21.6m/s²
hen catching a football, your fingers should shape a
a W
b M
c Triangle
d Open circle
PLEASE ANSWER ASAP
Answers
Answer:
c.triangle
Explanation:
this is because I played football in be and the teacher told up it should be a triangle
1ST CORRECT ANSWER GETS BRAINLIEST ASAP
Will can jog/walk the mile in 12 minutes and 40 seconds. He is motivated to improve his time by 25%. When he succeeds with this fitness goal he will be able to run the mile in what length of time?
9 minutes and 30 seconds
9 minutes and 50 seconds
10 minutes and 20 seconds
10 minutes and 30 seconds
Answers
Answer:
9 minutes and 30 seconds