Answer:
A bicycle.
Explanation:
A compound machine is a machine consisting of multiple simple machines.
A bicycle contains 3 simple machines. A lever, pulley, and wheel-and-axle.
all other choices are simple machines.
Hope this helps!
-MoCKEry
Answer:
I think its bicycle
Explanation:
When a spring is compressed, the energy changes from kinetic to potential. Which best describes what is causing this
change?
work
power
gravitational energy
chemical energy
Answer:
Work
Explanation:
The definition of work in physics is, the measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.
Therefore, the work that's been done causes a change in the overall energy of the system. It's what causes the change from potential to kinetic.
Work caused the energy change from kinetic to potential when the spring was compressed.
What is Work?
This is defined as measure of energy transfer which occurs when an object is moved as a result of an external force.
The spring was compressed which caused the movement and energy transfer thereby depicting work done and makes option A the correct choice.
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Which of the following best describes this image?
Answer:
B and D
High Accuracy
Low precision
Explanation:
Its attached below!
What is the proper way to start a fire?
-Gather small twigs and light them. Then gather larger sticks.
-Gather only kindling to start the fire. Then light your fire.
-Gather more firewood than you think you will use. Then light your fire.
-Gather only the firewood you think you will use. Then light your fire.
Please hurry marking brainliest
Answer:
Explanation:
STEP 1: Gather Your Tools. There's a bit more to building a great campfire than simply placing a few logs in a heap ... If your site has a fire ring, you'll probably have to push the ash and charcoal from ... (Remember, tinder is the really light, quick burning material.) 1. ... Then build a larger teepee of firewood over the kindling.
Besides air pollution, the student was concerns about water/ocean pollution. They heard many recent issues of too much plastic in the ocean and other pollutants in the water. The pie chart below provides data on the sources and amounts of different pollutants entering the oceans.
frist picture
The student read a news article that discussed the increase in amount of pollutants entering oceans and washing up on shores. The article included this image.
second picture
What is the concern with the increase in plastic waste in oceans? (Select 3 answer choices).
It is biodegradable so it eventually disintegrates/disappears.
It never fully goes away. It just breaks down into little pieces.
Plastic waste that is recycled, winds up in oceans.
Most fish usually eat plastic, and therefore this is overpopulating fish in the oceans.
Fish mistake plastic for prey and can die from it.
Marine species have been seen to become entangled in plastics.
Answer:
1. It never fully goes away. It just breaks down into little pieces.
2. Fish mistake plastic for prey and can die from it
3. Marine species have been seen to become entangled in plastics.
Explanation:
The question is asking about the concerns regarding the increase of plastic waste in the ocean so the harmful affects of plastic.
1. Like the Great garbage patch in the pacific which is twice the size of Texas, most plastics in the patch are microscopic level meaning plastic wouldn't disappear, but will be staying in the ocean.
2. Since plastic breaks down into little pieces, fishes might consider some plastic as food due to its small size and consume it. Due to plastic not disintegrating, it will be staying in the fishes body forever.
3. Plastics such as plastic packing band can become deadly on certain marine species. For one being sea lions. Sea lions don't have fingers but flippers, by being entangled with it at an early age, it would be deadly as they grow old due to their growing size. When a sea lion becomes an adult with plastic packing band, the Sea Lion is getting chocked with its size growing.
Light of wavelength 633nm passes through a single slit of width 1.50*10^-5 m. At what angle does the second interference minimum (m=2) occur? °
Answer: The second interference is minimum at angle 5 degree approximately
Explanation:
Given that the
Wavelength (λ) = 633nm
Width d = 1.5 × 10^-5m
n = 2
The wavelength (λ) of the light passing through a single slit is related to the angle Ø by
dsinØ = n(λ)
Substitutes all the parameters into the above formula
1.5×10^-5 × SinØ = 2 × 633 × 10^-9
Make SinØ the subject of formula
SinØ = 1.266×10^-6/1.5×10^-5
SinØ = 0.0844
Ø = Sin^-1( 0.0844 )
Ø = 4.84 degree.
The second interference is minimum at angle 5 degree approximately
Answer:
4.84
Explanation: (source) Trust Me Bro
An indicator does which one of the following in the presence of acids and
bases?
A. Conducts electricity
B. Combusts
C. Corrodes
D. Changes color
SUBMIT
Answer: d) changes color
Explanation:
What is the correct definition of pH?
how basic a solution is
the concentration of potassium ions in solution
how acidic a solution is
the concentration of hydrogen ions in solution
Answer:
here is your answer..
Explanation:
the concentration of hydrogen ions in solution
Hydrogen ion concentration in a solution is called pH so, option 'D' is the correct answer.
What is pH ?The concentration of hydrogen ions in a solution is measured by its pH, which is a measure of its acidity. Pure water splits into hydrogen and hydroxyl (OH-) ions in roughly equal amounts.
The word pH denotes the concentration of hydrogen ions in a solution, such as what percentage of a solution contains hydrogen ions. The pH scale ranges from 1 to 14, with 1 being the most acidic and 14 being the most alkaline.
Find out more information about 'alkaline'.
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i will give you 55 points to write me a letter about stopping pollution
Answer:
Pollution is a really big problem in our planet and it must be stopped immediately. It must be stopped before our planet goes extinct. There are three main reasons, in my opinion, why pollution should be stopped. We can’t keep living in some of the conditions our planet is on because of us and what we do to it.
The first reason why we should stop pollution is that pollution is destroying the environment we live in. Power stations produce nearly 10 billion tons of carbon dioxide per year. Carbon dioxide is a big contribution for pollution. Carbon dioxide affects our climate in many different ways. The way it works is that basically certain 'greenhouse gases' can't escape from our atmosphere because they get trapped. CO2 is what plants need to create oxygen. But when there is too much carbon dioxide being admitted into our environment from burning fossil fuels, cars etc, and we are cutting down trees for paper, it is imbalanced. Pollution is the introduction of harmful contaminants into an environment that causes instability, disorder, harm or discomfort to living organisms and ecosystems.In 1987, the U.S. released 1.2 million tons of toxic chemicals into our atmosphere, 670,000 tons into our soil, and 250,000 tons into our water. 40% of America’s rivers and 46% of America’s lakes are too polluted for fishing, swimming, or aquatic life. This shows that water pollution, air pollution, and ground pollution are common
The second reason why we should stop pollution is that it also affects us humans. Pollution also affects human life and that is a big problem. According to the US-EPA, emissions from power plants contribute to over 2,800 lung cancer deaths and 38,200 heart attacks annually in the US. The risk of cancer from breathing diesel gas is about ten times more than ingesting all other toxic air pollutants combined, with diesel emissions contributing to over 70% of the cancer risk from air pollution in the USA. both developing and developed nations, fossil fuel consumption- mostly by industry, vehicles and power plants, releases air pollutants such as particulate matter, sulfur dioxide, nitrogen dioxide, and ground-level ozone. According to the World Health Organization, indoor air pollution from the burning of coal or biomass fuels like wood jeopardizes perhaps half of humanity. Air pollution causes 2 million deaths per year, mostly from heart disease and respiratory disorders like infections and lung cancer.
The third reason why we should stop pollution is that if we do, we can live longer on this planet. If we dont stop pollution and global warming, something really bad will happen to every. Our existance, humans, won’t be over if we do the right thing if we all help the environment. Modern humans have been on Earth for 200,000 years and in those years, humans have destroyed the planet so quick. We can live longer and extend our existance on this planet so that our children’s children’s can live in a planet without worries.
In conclusion, pollution must be stopped immediately and once in for all. This is our only home and we must protect it and take care of it as much as we can. pollution must be stopped before we ruin our planet. We can live anywhere else, therefore we must try to save it.
HOPE THIS HELPS :)
Which of the following is the most likely global climate change?
a. a decrease in the overall temperature of the Earth
b. an increase in the overall temperature of the Earth
an increase in the number of cold climates
no change to global climate
C.
d.
Please select the best answer from the choices provided
OA
OB
OC
OD
Answer:
b. an increase in the overall temperature of the Earth
Explanation:
Answer:
Ban increase in the overall temperature of the Earth
Explanation:
I took the edg test
A group of students have decided that the amount of electricity used by the school should be reduced. The students want to develop a plan to solve this problem. What should the group do first? Select one: a. determine what materials should be used to implement the plan b. conduct research on energy conservation to form the plan c. improve the design of the plan d. test the validity of the plan
Here the group should do first is that improve the design of the plan so that the problem should be solved.
What is electricity?
Electricity refers to the physical phenomena that should be connected with the presence and the motion of the matter that contain the electric charge property. It is related to the magnetism, also it should be the part of the electromagnetism.
Therefore, we can conclude that Here the group should do first is that improve the design of the plan so that the problem should be solved.
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you may slip if you step on a banana peel similarly you may find difficulty to walk on a slippery or a wet floor
Answer:
yes you do slip
Explanation:
You are walking down the hallway and your mean little brother sticks his foot out to trip you. You don't notice and land- SPLAT! - sprawled out on the floor.
Based on the laws of motion, why did you fall?
3rd Law: Action- brother sticks out his foot. Reaction- you fall.
2nd Law: You weigh more than your little brother, so you had more acceleration.
4th Law: Little brothers are always mean.
1st Law: Your body was an object in motion and stayed in motion. Since the force stopped only your feet, the rest of your body kept going and fell.
Answer:
Answer is D. 1st law
Explanation:
because once an object is in motion it stays in motion until stoped by another force, in this case it would be your body hitting the floor
What’s the difference between the speed and velocity of an object?
A.) Speed accounts for the distance traveled and the direction, whereas velocity considers only the distance traveled per unit of time.
B.) Speed refers to the distance an object travels per unit of time only, whereas velocity also indicates the direction of travel.
C.)
Speed refers to the distance an object travels over time, whereas velocity represents the speed only at a given moment.
D.) Speed refers to the distance the object travels only, whereas velocity accounts for the acceleration of the object.
Answer:
B)Speed refers to the distance an object travels per unit of time only, whereas velocity also indicates the direction of travel.
Correct Answer
EXPLANATION
While it's common to casually use the terms “speed” and “velocity” interchangeably, they don't mean the same thing. Speed refers to the distance traveled by a body in any direction in a unit of time. Velocity is the distance traveled by a body in a particular direction in a unit of time.
The difference between the speed and velocity of an object is: Speed refers to the distance an object travels per unit of time only, whereas velocity also indicates the direction of travel. Hence, option (B) is correct.
What are speed and velocity?Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.
The pace at which an object's position changes in relation to a frame of reference and time is what is meant by velocity. Although it may appear sophisticated, velocity is just the act of moving quickly in one direction. Since it is a vector quantity, the definition of velocity requires both magnitude (speed) and direction.
Its SI equivalent is the meter per second (ms⁻¹). A body is considered to be accelerating if its velocity changes, either in magnitude or direction.
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It takes 63 W to power a ceiling fan. The energy output of the fan is 50 W. Calculate the efficiency of the fan. Round your answer to the nearest percentage. %
Answer: 79% on edg
Explanation:
Answer:
79%
Explanation:
on edg
The main cause of weather is?
Answer: Weather on Earth is caused by heat from the sun and movement of the air. All weather happens in the lower layer of Earth's atmosphere, which is a layer of gases surrounding Earth. The sun's heat warms the air in this layer to different temperature levels in different places. ... This movement of air is what we call wind.
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Explanation:
Answer:weather is caused by the heat and the movement of air.
Explanation:
I googled it
What does this graph show about the acceleration of the moving object? the acceleration is constant the object is not accelerating the acceleration is decreasing the acceleration is increasing
Answer:
The acceleration is constant
Explanation:
Answer:
The acceleration is constant
Explanation:
A ball is released from the top of a hill. How fast is the
ball going when it reaches the base of the hill?
Approximate g as 10 m/s2 and round the answer to the
nearest tenth.
m/s
h = 2 m
h = 0.5 m
Answer:
The answer to the question asked is 5.477m/s and 5.5m/s if you round up.
The position of a charge in an electric field gives it _____electric
Answer:
The space surrounding a charged object is affected by the presence of the charge; an electric field is established in that space. A charged object creates an electric field - an alteration of the space or field in the region that surrounds it. Other charges in that field would feel the unusual alteration of the space.
Explanation:
The unit of charge is.....
Teslas
O volts
joules
coulombs
Answer:
Coulomb
Explanation:
The unit of charge is coulomb. Electric current is defined as the electric charge per unit time. It can be written as :
[tex]I=\dfrac{q}{t}\\\\q=I\times t[/tex]
So, the correct option is (D) "coulomb".
What is the mass of an object that has a density of 3.2 g/cm3 and a volume
of 5.5 cm3? (The density of an object has the equation d =m/v.)
Answer:
The mass of an object is 17.6 grams.
Explanation:
We have,
Density of the object is 3.2 g/cm³.
Volume of the object is 5.5 cm³
It is required to find the mass of the object. The density of the object is given by the mass acting per unit its volume. It is given by :
[tex]\rho =\dfrac{m}{V}[/tex]
m is the mass of an object
[tex]m=\rho \times V\\\\m=3.2\ g/cm^3 \times 5.5\ cm^3\\\\m=17.6\ g[/tex]
So, the mass of an object is 17.6 grams.
Which of the following is correct scientific notation for the value 0.000537
meters?
A. 0.537 x 10-3
B. 5.37 x 10-4
C. 537 x 10-8
D. 53.70 x 103
Answer:
[tex]5.37\times 10^{-4}\ m[/tex]
Explanation:
Scientific notation is used to express a number in the form of [tex]a\times 10^b[/tex]. Here, a is real number and b is integer.
The given number is 0.000537 m
To express it in scientific notation, we must understand that there are 6 numbers after decimal. There are 3 zeroes before 537.
In scientific notation we can write it as :
[tex]5.37\times 10^{-4}\ m[/tex]
Therefore, this is the required answer.
Answer:
5.37×[tex]10^{-4}[/tex]
Explanation:
A P E X
How does the electric force between two charged objects on the charges of the objects
Answer:
If one charged object is positive, and the other charged object is negative, then the two objects will attract each other. If both objects are positive, the objects will repeal each other. If both objects are negative, the objects will also repeal each other.
1. define feed
2; the various classes of animal feed.
3; the sources of feed
4; the feeding tools
Answer:
1.Animal feed is food given to domestic animals in the course of animal husbandry
2.) Roughages B) Concentrates C) Feed supplements and Feed additives
3. Feed grains
4.pliers, vacuum lifters, magnetic lifters, and stock positioners
Explanation:
1.Animal feed is food given to domestic animals in the course of animal husbandry
2.) Roughages B) Concentrates C) Feed supplements and Feed additives
3. Feed grains
4.pliers, vacuum lifters, magnetic lifters, and stock positioners
Conclusions related to historical events are limited to subjective evaluation of the existing evidence because _____.
Answer: they can not be replicated or repeated.
Explanation:
A historical events are opened for more study and research. So, they can be repeated for more study but with reference to the documents written about that event in a manner in which others are permitted to.
Where as, the conclusions related to historical events are limited to the subjective evaluation based on the different outcomes draw as a result of individual findings.
If the average speed of a drag racing car is 0.069 miles second, how long would it take the car to complete a 1/4 mile (0.25 mile) straight track?
Answer: 3.6 seconds
Explanation:
The correct speed of the car is 0.069 miles per second.
Hi, to answer this question we have to apply the next formula:
Time = distance / speed rate
Replacing with the values given:
t = 0.25 m/ 0.069 mps =3.6 seconds
It would take the drag racing car 3.6 seconds to complete a ¼ mile straight track.
Feel free to ask for more if needed or if you did not understand something.
Help pls will mark right answer
Answer:
Less
Explanation:
Since acceleration is inversely propotional to mass keeping the force constant, hence more mass will accelerate less and vice versa.
If gravity is the only force present, what is the total mechanical energy of a
rock falling off a cliff at a time when its potential energy is 500 J and its
kinetic energy is 600 J?
A. 500 J
B. 100 J
C. 600 J
D. 1,100 J
Answer:
(D) is correct option.
Explanation:
At a particular time, the potential energy of a rock is 500 J and its kinetic energy is 600 J.
It is required to find the mechanical energy of the rock. Mechanical or total energy is the sum of kinetic and potential energy. So,
TE = K+ P
TE = 500 J + 600 J
TE = 1100 J
So, the total mechanical energy of a rock is 1100 J. Hence, the correct option is (D).
Answer:
1,100
Explanation:
two objects with the same mass will always have the same momentum true or false
Answer:
false
Explanation:
momentum = mass x velocity
a. Fill in the blanks in the following paragraph to correctly identify some
unique properties of water. (1 point)
Water is important to living things because it remains in the___state over a wide range of temperatures. Water in lakes and oceans does
not experience large temperature changes because liquid water has a
___specific heat, so it must absorb or release a lot of energy as its temperature changes. The
___forces between water
molecules cause water to form round droplets and cause water's high___.Water is also an important_____because it can
dissolve many different substances.
Answer:
1.) Liquid
2.) Low
3.) Molecular
4.) Surface tension
5.) Solvent
Explanation:
Water is important to living things because it remains in the LIQUID state over a wide range of temperatures. Water in lakes and oceans does
not experience large temperature changes because liquid water has a
LOW specific heat, so it must absorb or release a lot of energy as its temperature changes. The MOLECULAR forces between water
molecules cause water to form round droplets and cause water's high SURFACE TENSION. Water is also an important SOLVENT because it can
dissolve many different substances.
1.) Liquid
2.) Low
3.) Molecular
4.) Surace tension
5.) Solvent
The following information should be considered:
Water is important to living things because it remains in the LIQUID state over a wide range of temperatures. Water in lakes and oceans does not experience large temperature changes because liquid water has a LOW specific heat, so it must absorb or release a lot of energy as its temperature changes. The MOLECULAR forces between water molecules cause water to form round droplets and cause water's high SURFACE TENSION.Water is also an important SOLVENT because it can dissolve many different substances.Learn more: https://brainly.com/question/4804019?referrer=searchResults
Question 2 (1 point)
If an atom has 3 protons, 3 electrons and 2 neutrons, what is the atom's electrical
charge?
positive
negative
neutral
Answer:
neutral
Explanation:
3p - 3e = 0 and that leaves 2 neutrons so it will be neutral