What is created by the flow of electric current?
A.) a battery
B.) an electric field
C.) a magnetic field
D.) a resistor
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!
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!
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
What type of machine converts electrical energy to mechanical energy using magnetism?
A. boiler
B. generator
C. motor
D. turbine
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.
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
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
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?
Answer the question below
Answer:
The last one
Explanation:
A instinct is a sudden trigger than dont be needed to improve on.
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.
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:
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
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
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
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