Answer:
I think theres air that flows thru it
Explanation:
In 3 to 5 sentences explain the differences between chemical and physical changes
Answer:
a physical change in a substance doesn't actually change what the substance is. it remains the same. in a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
Explanation:
Answer:
The difference between chemical and physical changes is that a chemical change happens whenever there is a change in the molecule of a substance. Chemical changes always make a new substance and could never go back to how it was before. In a chemical change, the energy causes the atoms to break free of their molecules and form different molecules.
A physical change never forms a new substance, for example, if you cut an apple in half it will still be an apple because it did not form a new substance or it does not have mold or anything on it that will not be able to change back to what it was before. The type of physical changes is texture, shape, temperature, and a change in the state of matter.
So the difference between them is that a chemical change can never go to what it was before but a physical change can.
What is created by the flow of electric current?
A.) a battery
B.) an electric field
C.) a magnetic field
D.) a resistor
what is the meaning of life? why are we here? what is the goal
Answer:
you are the one who gives meaning to your life, do what u want to do. try new things and just enjoy the good things that you alreadyknow u like. you shouldn't look at life as a competition or as a task that needs something to be done, just do whatever u want
Waldo gets stopped by the police, and the police officer tells Waldo that she caught him on radar doing 50 miles per hour in a 40 miles per hour zone.
Waldo responds, " I was traveling 50 miles per hour. I sat at home for 1 hour and then drove for 1 hour before you stopped me. I traveled 50 miles total in that second hour. So, my speed was 25 miles per hour. That's well under the speed limit."
Waldo is wrong, per speeding laws, and does receive a speeding ticket. Explain how Waldo came up with a speed of 25 miles per hour in multiple sentences.
Answer:
He calculated his average speed.
Explanation:
Waldo calculated an average of his speed in 2 hours rather than his speed whilst driving which means instead of doing 50/1 hour = 50 mph, he did 50/2hours which is how he got 25 mph. Hope this helps!
Which part of the water cycle is released by trees?
Answer:
mark me as brainliest plsss !! :)
Explanation:
transpiration
Forests are a critical cog in the global water cycle: Trees pull water from the ground and release it into the atmosphere as vapor through pores in their leaves in a process called transpiration, which can drive temperatures and rainfall across the globe.
As the total resistance is reduced in a simple electrical circuit, the current flow will _____.
A. increase
B decrease
As resistance is increased, the current flow will decrease. Therefore, as the resistance is reduced, the current flow will increase.
Ice and water in a glass are at the same temperature. What other similarities or differences are there between the water and the ice?
A. All of the particles will have the same potential energy, but the particles in the ice will have more kinetic energy.
B.All of the particles will have the same kinetic energy, but the particles in the ice will have more potential energy.
C.All of the particles will have the same potential energy, but the particles in the water will have more kinetic energy.
D.All of the particles will have the same kinetic energy, but the particles in the water will have more potential energy
Answer:
C
Explanation: ITS C!!! HOPEFULLY, THIS HELPS!!! :)
"Ice and water in glass are at the same temperature. What other similarities or differences are there between the water and the ice? All of the particles will have the same potential energy, but the particles in the water will have more kinetic energy."
Answer: C
Explanation: if wrong let me know pls
If 'P' represents white color flowers and 'p' represents purple color flowers, and you cross a PP plant with a pp plant, what will be the genotype of the offspring?
A compass contains a magnet. The magnet responds to Earth’s magnetic field. The magnet’s north pole points north from most locations on Earth. Based on what you learned about magnetic force, make three predictions. Predict the approximate size of Earth’s magnetic field and the approximate location of its North and South Poles. Give a reason for each prediction.
If you use a website to help get the info you must use a .edu or .gov website and list it in your answer
Answer:
First Prediction: I predict that in the Southern Hemisphere, the needle of the compass will point south rather than north as the magnetic pull from the southern pole is greater than the northern pole there.
Second Prediction: I predict that moving a magnet around a compass will cause the needle to point to the closer magnet rather than a pole of the earth as the magnetic pull of the magnet is stronger than the magnetic pull of the closest pole of the Earth.
Third Prediction: I predict that the size of Earth’s magnetic pull is on all of the Earth. This is because the compass will— as long as it is not impacted by another magnetic force— always point toward the nearest magnetic pole. Furthermore, I predict that Earth’s North and South Poles are at the top and the bottom of the Earth, as the compass will always point north or south.
A bottle of water is taken out of a refrigerator and put on a kitchen table. As the bottle of water warms up, what happens to the particles in the water?
A.The average space between particles decreases.
B.The average kinetic energy of the particles increases.
C.The average potential energy of the particles decreases.
D.The average temperature of the particles increases.
Answer: D
Explanation:
I think it is D if i am wrong sorry
If your apparatus were to be dropped from a mile above the ground, describe the forces acting upon your apparatus as it fell. How would those forces change from the moment before the drop, until just before your apparatus hits the ground.
Answer:
An accelerometer is a tool that measures proper acceleration.[1] Proper acceleration is the acceleration (the rate of change of velocity) of a body in its own instantaneous rest frame;[2] this is different from coordinate acceleration, which is acceleration in a fixed coordinate system. For example, an accelerometer at rest on the surface of the Earth will measure an acceleration due to Earth's gravity, straight upwards[3] (by definition) of g ≈ 9.81 m/s2. By contrast, accelerometers in free fall (falling toward the center of the Earth at a rate of about 9.81 m/s2) will measure zero.
Accelerometers have many uses in industry and science. Highly sensitive accelerometers are used in inertial navigation systems for aircraft and missiles. Vibration in rotating machines is monitored by accelerometers. They are used in tablet computers and digital cameras so that images on screens are always displayed upright. In unmanned aerial vehicles, accelerometers help to stabilise flight.
When two or more accelerometers are coordinated with one another, they can measure differences in proper acceleration, particularly gravity, over their separation in space—that is, the gradient of the gravitational field. Gravity gradiometry is useful because absolute gravity is a weak effect and depends on the local density of the Earth, which is quite variable.
Single- and multi-axis accelerometers can detect both the magnitude and the direction of the proper acceleration, as a vector quantity, and can be used to sense orientation (because the direction of weight changes), coordinate acceleration, vibration, shock, and falling in a resistive medium (a case in which the proper acceleration changes, increasing from zero). Micromachined microelectromechanical systems (MEMS) accelerometers are increasingly present in portable electronic devices and video-game controllers, to detect changes in the positions of these devices.
Explanation:
hope this helps !!!!
New seafloor material is formed at places in Earth’s crust where –
A Rock is broken into pieces as tectonic plates push against one another
B One tectonic plate slides beneath another and is forced downward
C Lava flow from volcanic eruptions builds up over many thousands of years
D Magma rises into the spaces where tectonic plates pull away from one another
Answer:
D, I think.
Explanation:
I had a quiz in Plate Tectonics and there was 2 questions that are related to this, but not the exact question.
Which material rises from cracks in oceanic crust
-molten rock
Which is the first step in the seafloor spreading process?
-a crack forms in oceanic crust.
those are all right btw, so you can decide if the answer I told you is right or not.
Answer:
D.
Explanation:
Give the other person brainliest he has a good explanation.
Lab Report: Reaction Rates and Temperature
In this activity, you will complete a virtual experiment to determine how the temperature of water affects the time it takes for antacid tablets to dissolve.
Pre-lab Questions
1. How does an increase in concentration affect a chemical reaction?
2. When temperature increases, what happens to the molecules in a chemical reaction?
3. How do we measure the average kinetic motion of molecules in a solution?
Hypothesis Before you begin your lab, write a hypothesis that reflects how you think temperature of the water will affect the reaction rates. Record your hypothesis as an “if, then” statement.
Variables
This experiment tests how the temperature of water affects the time it takes for antacid tablets to dissolve.
1. What is the independent variable?
2. What is the dependent variable?
Materials
Note that you may choose to conduct this lab with the materials listed below (follow all lab safety procedures) or by watching the experiment video in the lesson.
• 4 antacid tablets
• 2 clear cups labeled Hot and Cold
• Water
• Timing device
Procedure
• Observe the experiment in the virtual lab window. (Or, if you choose to perform this experiment yourself, follow the same procedures shown in the video.)
• Record the time for each trial of the experiment.
Data
Data table: Record the length of time for each trial.
Trial
Time for tablet to dissolve in hot water
Time for tablet to dissolve in cold water
1
2
Graph
Create and include a graph to show the results from the trials. You may use the Create A Graph tool located in the course toolkit for help creating a graph.
Post-Lab Questions
1. Review your data. Did your experiment support your hypothesis? Support your answer with data from your experiment.
2. How did the temperature affect the time it took for the antacid tablet to dissolve?
3. What evidence indicates that a chemical reaction took place?
4. Predict what would happen if the same experiment was conducted with different amounts of water.
Answer:
3. How do we measure the average kinetic motion of molecules in a solution?Hypothesis Before you begin your lab, write a hypothesis that reflects how you think temperature of the water will affect the reaction rates. Record your hypothesis as an “if, then” statement.VariablesThis experiment tests how the tempe
Explanation:
Answer: Look at the PDF I attached. Hope this helps!
50 points if you help me
Answer:
X-precipitation
Y(plants)-photosynthesis
Y(animals)-respiration
W-evaporation
Explanation:
25 points. Pls, hurry, What happens to the energy of a wave if the amplitude of the wave is doubled?
Second question: How does the frequency of a wave relate to the energy of the wave?
Compare and contrast electric conductors and electric insulators. Give an example of each.
Answer:
conductor:-
A substance that allows heat to pass through them is known as a conductor.
Example:-All the metals, water, etc.
Insulator:-
A substance that does not allows heat to pass through them is known as an insulator.
Example:-All the nonmetals etc.
Explanation:
Bananas are curved because they grow towards the sun. Is this true?
Answer:
YES
Explanation:
The reason for this particular growth pattern followed by bananas is that the very first bananas were grown in a rain forest. Rain forests experience extremely less sunlight. Hence, to balance itself, the plant started growing towards the sunlight. This helped the plants to receive maximum possible sunlight.
An air conditioner has a power rating of 3000 W and is used daily. Its electrical
consumption is 120 kWh for one week.
(a) Calculate, in hours, the average duration for which the air conditioner is used daily
Answer:
5.714 hours / day
Explanation:
Calculate the hours used in that week
120000 / 3000 = 120 / 3 = 40 hours a week
Calculate the amount it is used in one day
40 / 7 = 5.71428571 hours or 5.714 hours/day
Answer:
5.714 hours / day
Explanation:
The simple answer
A student rolls a 3-kilogram ball down the same ramp used in Setup 2. The speed of the ball after 2 seconds was 4 meters per second. The student concludes that the kinetic energy of the 3-kilogram ball is identical to the 1-kilogram ball after it has rolled down the ramp for 2 seconds.
Explain whether the student’s conclusion is correct or incorrect. Use evidence from the investigation to support your answer.
Answer:
The conclusion is incorrect, according to the text.
Explanation:
the small small that is 1 kilogram must go more fast,because begin with more kinetic energy, and can roll more faster by it's light weight, the 3 kilogram ball must be more late for roll down, because have more potential energy than kenetic energy, so in conclusion the light ball go more fast and have more kenetic energy that the heavy ball.
please help :)
explain how changes made to an electrical system may result in electrical hazards
Answer the question below
Answer:
The last one
Explanation:
A instinct is a sudden trigger than dont be needed to improve on.
What type of machine converts electrical energy to mechanical energy using magnetism?
A. boiler
B. generator
C. motor
D. turbine
Describe the overall pattern of change in average global temperatures from 1860 to 2000.
Answer: According to the graph, we can actually say that: The global surface temperature average was significantly lower during the period from 1860 to 2000.
What is temperature?
Temperature is actually known as the physical quantity which is usually used to express the degree of hotness and coldness of a matter. It is used to show the thermal energy that matter possesses.
We can see from the graph that the global surface temperature average was significantly lower during the period from 1860 to 2000.
Explanation:
The graph actually demonstrates that the average worldwide surface temperature was substantially lower between 1860 and 2000.
What is global temperature?In reality, the temperature is a physical measurement that is typically used to represent how hot or cold a substance is. The thermal energy that matter possesses is demonstrated by using it.
The main cause of Earth's warming is the presence of additional greenhouse gases in our atmosphere. Methane and other greenhouse gases like carbon dioxide (CO2) trap heat from the Sun in the Earth's atmosphere. It is typical for our atmosphere to have certain greenhouse gases.
The graph shows that between 1860 and 2000, the average worldwide surface temperature was much lower.
Thus, the graph actually shows that between 1860 and 2000, the average global surface temperature was significantly lower.
To learn more about global temperature, refer to the link:
https://brainly.com/question/10283285
#SPJ2
Lab Report: Reaction Rates and Temperature
In this activity, you will complete a virtual experiment to determine how the temperature of water affects the time it takes for antacid tablets to dissolve.
Pre-lab Questions
1. How does an increase in concentration affect a chemical reaction?
2. When temperature increases, what happens to the molecules in a chemical reaction?
3. How do we measure the average kinetic motion of molecules in a solution?
Hypothesis Before you begin your lab, write a hypothesis that reflects how you think temperature of the water will affect the reaction rates. Record your hypothesis as an “if, then” statement.
Variables
This experiment tests how the temperature of water affects the time it takes for antacid tablets to dissolve.
1. What is the independent variable?
2. What is the dependent variable?
Materials
Note that you may choose to conduct this lab with the materials listed below (follow all lab safety procedures) or by watching the experiment video in the lesson.
• 4 antacid tablets
• 2 clear cups labeled Hot and Cold
• Water
• Timing device
Procedure
• Observe the experiment in the virtual lab window. (Or, if you choose to perform this experiment yourself, follow the same procedures shown in the video.)
• Record the time for each trial of the experiment.
Data
Data table: Record the length of time for each trial.
Trial
Time for tablet to dissolve in hot water
Time for tablet to dissolve in cold water
1
2
Graph
Create and include a graph to show the results from the trials. You may use the Create A Graph tool located in the course toolkit for help creating a graph.
Post-Lab Questions
1. Review your data. Did your experiment support your hypothesis? Support your answer with data from your experiment.
2. How did the temperature affect the time it took for the antacid tablet to dissolve?
3. What evidence indicates that a chemical reaction took place?
4. Predict what would happen if the same experiment was conducted with different amounts of water.
Answer: 1. Increasing the concentrations of reactants in a chemical reaction would affect a reaction positively by increasing the number of collisions within a particular period which in turn increases the rate of reaction.
2. The molecules gains energy,which enable them to move faster and collide with the right energy for a reaction to take place.
3. The average kinetic motion of molecules in a solution can be measured by measuring the temperature. Temperature is a measure of the average kinetic energy of molecules in a solution.
Explanation: A experts answer
why do we "call it a day" when it's the end of the day/ night time?
Answer:
Explanation:
We call it “a day”, beucase the day is over.
Answer:
Hello, I'm here to help :D
The Explanation:
The original phrase was call it half a day, first recorded in 1838, which reffered to leaving one's place of employment before the work day was over.
The first recorded use of call it a day was in 1919, and of call it a night in 1938
Bye! - Lilo
Why can't ppl's parent's just accept you for who you are??
Answer:
is this a physics questions???
and i didnt get u btw
he primary coil in a transformer has 250 turns; the secondary coil has 500. Which is correct?
a. This is a step-down transformer.
b. The voltage in the secondary coil will be higher than in the primary.
c. The power in the secondary coil is greater.
d. The power in the primary coil is greater.
Answer:
b
Explanation:
hope its help po #carry onlearning
How does the diaphragm remove air from the lungs?
When the diaphragm pulls downward, it increases the volume of the lungs, pushing air out.
When the diaphragm pulls downward, it decreases the volume of the lungs, pushing air out.
When the diaphragm pushes upward, it increases the volume of the lungs, pushing air out.
When the diaphragm pushes upward, it decreases the volume of the lungs, pushing air out.
Answer:
d) When the diaphragm pushes upward, it decreases the volume of the lungs, pushing air out.
Explanation:
the relaxed diaphragm muscle is dome-shaped, the contracted muscle is horizontal.
can someone help me please :)
Answer:
water chichet and flea
Explanation:
i dont know how to spell sorry