HI! I NEED HELP ASAP!!
Why are electromagnets used in metal scrap yards?
A.They are temporary magnets, so they can be turned on and off.
B. They are very powerful permanent magnets.
C. They are weak permanent magnets.
D. They are temporary magnets, so eventually the metal just falls off.
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Answer:
The answer is A. They are temporary magnets, so they can be turned on or off.
Explanation:
An Electromagnet consist of a soft ion core in a current carrying solenoid that is wound in opposite direction round the two arms of a bar.
They are temporary magnets and they loose their magnetic property the moment they are turned off.
Answer:
A. They are temporary magnets, so they can be turned on or off.
Explanation:
Related Questions
Huan wants to enter the science fair at his school. He has a list of ideas for his project. Which questions could be answered through scientific investigation? Check all that apply. Does pressure have an effect on the solubility of a substance? Which physicist was the smartest? Is the information on the periodic table difficult to understand? Which brand of soap is the best for cleaning grease off of dishes? Which laboratory experiment is the most fun to perform?
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Explain what happens as the heart grows bigger.
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Initially, the heart may grow bigger as a compensatory mechanism to try to keep up with increased demands for blood and oxygen. For example, if a person engages in regular exercise, their heart may enlarge to accommodate the increased demand for blood and oxygen to the muscles.
However, if the heart continues to grow over time, it can become less efficient at pumping blood and may develop structural abnormalities that increase the risk of heart failure, arrhythmias, and other complications.
In some cases, cardiac hypertrophy may be reversible if the underlying cause is treated, such as by managing high blood pressure or heart disease. However, if left untreated, hypertrophy can lead to irreversible damage to the heart muscle and may require more aggressive interventions, such as medication, surgery, or other medical procedures to manage the condition.
What type of circuit is this in the picture? (Lesson 4.07)
A: Parallel
B: Open
C: Ac
D: Series
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Answer: hope this helps ♡
A: Parallel
Explanation:
It's a parallel circuit because it has two or more paths for the electricity to flow through (the paths are parallel).
Answer:
A
Explanation:
You left some papers on a picnic table in the park on a windy, sunny day. When you returned, the papers were scattered all over the park. What can you conclude about the flow of energy in this situation?
The heat energy from the sun was transformed to sound energy, which moved the papers.
The heat energy from the sun was transformed into kinetic energy, which moved the papers.
The mechanical energy in the wind was transferred to the papers, which caused the papers to move.
The mechanical energy in the wind was transferred to the table, which caused it to shake and move the papers.
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Answer: Option c
Explanation: Wind has kinetic energy to move objects from their places. It is vastly used across the world for the production of electricity.
By turning the kinetic energy of moving air into electrical, the wind is used to generate power. Wind drives the rotor blades of contemporary wind turbines, which transform kinetic energy into rotational energy. A shaft transmits this rotational energy to the generator, which generates electrical energy. More than a century ago, the first wind turbines appeared. After the electric generator was developed in the 1830s, engineers began experimenting with harnessing wind power to create electricity. However, modern wind power is thought to have been invented in Denmark, where horizontal-axis wind turbines were built in 1891 and a 22.8-meter wind turbine started operating in 1897. Wind power generation occurred in the United Kingdom and the United States in 1887 and 1888.
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Practice Activity:
.
In this experiment, the team will need to set up three different cups and label them as A,
B, and C. All three cups will get the same amount of water added to them. In order to
see how kinetic energy is transferred, the team needs to measure the initial
temperatures of each cup and record that in the data table, and then add different
amounts of ice to cups B and C. The mass of each amount of ice will be recorded in the
data table. After each ice cube melts, the team will record the temperature of the water
in each cup.
o The change in temperature will tell the team how much kinetic energy was
transferred from the water to the ice.
Think about how one can work effectively in a team to set the experiment up.
gather data, and analyze the data.
o
Mass Ice Added
Initial
Temperature
Final
Temperature
Cup A (Control)
Cup B
Cup С
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Answer:
What are we are trying to answer?
Explanation:
Answer:
where is the question so that i can do my best ???
Explanation:
a scientists collects a core sample from 60 km deep in earth what will she most likley observe plz help taking a test
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Answer:
Explanation:
A scientist collects a core sample from 60 km deep in Earth. Which characteristic will she most likely observe in this sample? C. The sample mainly consists of ...
Which would be the most reliable source for information about the toxicity of an industrial chemical?
a webpage on the internet with no sources listed
a brochure by a company that produces the chemical
a scientific journal article that is peer–reviewed
an opinion expressed by a chemistry professor
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pleeaseeee helllp A geologist finds a large rock containing a fern fossil. This kind of fern grew on land in hot, moist climates.
What does this tell the geologist about the area at the time the rock was formed?
The area was covered by an ocean.
The area was muddy and wet.
The area was hot and tropical.
The area was snowy and cold.
Answers
Answer: The area was hot and tropical.
Explanation:
Justin and Oscar each hit a baseball with a bat. The baseballs have the same mass, but the ball Justin hits has a greater acceleration. What might be the reason for the greater acceleration of Justin's baseball?
Answers
The acceleration is different in both cases because, the force applied is different. Acceleration is force divided by mass of the object. Thus, Justin had greater force than Oscar.
What is force ?Force is an external agent acting on body to change its motion or deform it. There are various kinds of forces such as frictional force, gravitational force, nuclear force etc.
According to Newton's second law of motion, the force acting on an object is the product of its mass and acceleration.
Thus, F = ma
Hence, as the force increases the body is accelerated more.
With the same mass for the two balls, the force used to hit it was different and thus, the acceleration differs in both cases. Therefore, Justin has the greater force.
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Which factor can increase both potential energy and kinetic energy of an object?
Increase in speed
Increase in mass
Decrease in temperature
Decrease in height from the ground
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What is an ecosystem? Group of answer choices An ecosystem is all different populations of animals in an area. An ecosystem is a community of plants and animals and their physical surroundings. An ecosystem is a single example of a particular species of plant or animal. An ecosystem is all the organisms of a particular kind of species and their surroundings.
Answers
Answer: An ecosystem is a community of plants and animals and their physical surroundings
Explanation: An ecosystem is a geographic area where plants, animals, and other organisms as well as weather and landscape work together to form a bubble of life. Ecosystems contain biotic and abiotic factors both. Biotic factors include plants, animals, and other organism
Answer: An ecosystem is a community of plants and animals and their physical surroundings.
Explanation: Ecosystem plays an essential role for the existence of living organisms in the planet Earth. A balanced ecosystem is attained as a result of various reasons it includes the live ratio of diverse varieties of organisms in a particular ecosystem, necessary physical, biological, and chemical conditions that promotes the living of organisms, and the balanced atmosphere attained as the result of temperature, wind, and humidity.
As all the above mentioned properties are necessary for maintaining a sustainable ecosystem, it is clearly understood that an ecosystem is a community of plants and animals and their physical surroundings.
4 Jilly and Fran are camping. They cover their bottle of milk with a wet cloth.
How does the wet cloth help to keep the milk cool? Tick one box.
A by conduction
B by convection
C by infrared radiation
D by evaporation
PLEASE HELP ITS ERGENT FOR A TEST
Answers
Answer:
HEY THERE!!
Explanation:
the answer to your question is option:
D by cooling evaporation
HOPE THIS HELPED HAVE A GREAT DAY AND GOOD LUCK ON YOUR EXAMS WISHING YOU THE BEST!! <33
Which automobile is faster a chevrolet or a ford? Also explain pls
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The half-life of sodium-24 is 15 minutes. What was the original mass of Na-24 if 5.0 g remains after 1 hour?
20 g
40g
80g
100g
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40g remains after an hour.
answer
40g
A __ is the starting point from which you describe an objects velocity
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Answer: Reference point
Explanation: A reference point is a starting point
Explanation: The reference point is the starting position.
How much is the mass of aluminum with a volume of 1 m3 less than the mass of lead of the same volume?
Answers
Answer: the masses:mA=mFe or ρA1VA1=ρFeVFethen use the volume of a sphere. By substitution. The answer is (2.70∗103kg/m37.86∗103kg/m3)(2.00cm)3=23.3cm3
Explanation: you must go from left to right when solving substitutuing the first side then dividing
Please help!
Does the hand crank generator system have energy?
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This is a science question
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The air currents across the continents would determine the distribution of the air.
What are air currents?Air currents across the continents are primarily driven by temperature differences and the rotation of the Earth. The warm air near the equator rises and flows towards the poles, while the cooler air near the poles sinks and flows towards the equator.
This creates large-scale circulation patterns known as Hadley cells, Ferrell cells, and Polar cells. These cells are responsible for the trade winds, westerlies, and easterlies, respectively. Additionally, there are also local winds caused by differences in terrain, such as sea breezes and valley breezes.
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How does energy from the Sun heat up an object?
a. when sunlight strikes an object, that sunlight is reflected. this reflection causes the particles of the object to move slower.
b. when sunlight strikes an object, some of the energy from the sunlight is absorbed by the object. this energy causes the particles of the object to move slower.
c. when sunlight strikes an object, some of the energy from the sunlight is absorbed by the object. this energy causes the particles of the object to move faster.
d. when sunlight strikes an object, that sunlight is reflected. this reflection causes the particles of the object to move faster.
Answers
Answer:
C
Explanation:
When sunlight hits an object, some of the energy is absorbed. This energy cause the particles to move faster, which increases the temperature of the object.
Which object is the largest?
asteroids
moons
comets
meteoroids
Answers
Answer:
Asteroids
Explanation:
Answer:
Moons
Explanation:
Let's say Laura wants to learn more about six-foot (1.8-meter) tubeworms. She would find the most information by __________.
A.Reading about metals in her science book
B.Looking at a picture of a hydrothermal vent
C.Reading a book about creatures in the ocean
D.Looking at pictures of animals in a nearby zoo
Answers
i think the answer is C because tube worms live in the ocean.
Explanation:
tube worms live in the ocean
Which of these is an example of acceleration?
A. A bicyclist turning around a corner.
B. A car traveling south with its cruise control set.
C. A bus traveling north at 25m/s
D. A helicopter waiting to take off.
Answers
Answer: A
Explanation:
Answer:
B IS THE ANSWER
Explanation:
Can you guys please help me out and it would me great if you could explain it too!!
Answers
2. 8N
3. The first box has a net force of 10N
The second box has a net force of 12n
Meaning the the second box has a greater net force
A heavy box is dropped from the roof of a small building and is traveling to the ground. Which claim about the forces acting on the box must be true?
Choose 1 answer:
A. There are no forces on the box.
B. There is no net force on the box.
C. There is a net force on the box.
D. There is not enough information.
Answers
Answer:
C. There is a net force on the box.
Explanation:
If the box was stationary, sitting on the roof, the correct answer choice would be A. In this scenario, the box is fallign downward, meaning that there is a net force pushing the box downward.
Answer:
C: there is a net force on the box
If Mohamed kicks the ball a speed of 30 meters per second a distance of 120m, how fast (time) will the reach the goal?
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Answer:
4 seconds
Explanation:
30+30+30+30=120
that is 4 30s so that is the anwser
What two gases in the atmosphere do animals and plants need to breathe and grow?
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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.
List three evidences that show that the Bible is the Word of God.
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Answer:1.God tells us that He is the Author (2 Peter 1:20-21 Open in Logos Bible Software (if available) & 2 Timothy 3:15-17 Open in Logos Bible Software (if available))
1.The Old Testament and New Testament Authors understood they were writing the Word of God. Common Old Testament phrase – “Thus saith the Lord”. The Apostle Peter confirmed the Apostle Paul’s writings as Scripture (2 Peter 3:16)
3.Its Historical Accuracy – as verified by archeology, which has never contradicted the Bible, but only confirms and silences its critics.
Explanation:
Answer:
Many people question who the author of the Bible is and wonder if the Bible is really the Word of God. I want to give you five reasons to affirm that the Bible is God's Word.
The Word of God: Evidence that Scripture is Divine
First, I believe the Bible is the Word of God because of its scientific accuracy. The Truth of the Word of God tells us that God “hangeth the earth upon nothing” (Job 26:7). How did Job know that the earth hung in space before the age of modern astronomy and space travel? The Holy Spirit told him. The scientists of Isaiah’s day didn’t know the topography of the earth, but Isaiah said, “It is [God] that sitteth upon the circle of the earth” (Isaiah 40:22). The word for “circle” here means a globe or sphere. How did Isaiah know that God says upon the circle of the earth? By divine inspiration.
Secondly, the Bible is affirmed through historical accuracy. Do you remember the story about the handwriting on the wall that is found in the fifth chapter of Daniel? Belshazzar hosted a feast with a thousand of his lords and ladies. Suddenly, a gruesome hand appeared out of nowhere and began to write on a wall. The king was disturbed and asked for someone to interpret the writing. Daniel was found and gave the interpretation. After the interpretation, “Then commanded Belshazzar, and they clothed Daniel with scarlet, and put a chain of gold about his neck, and made a proclamation concerning him, that he should be the third ruler in the kingdom.” (Daniel 5:29). Basing their opinion on Babylonian records, the historians claim this never happened. According to the records, the last king of Babylon was not Belshazzar, but a man named Nabonidas. And so, they said, the Bible is in error. There wasn’t a record of a king named Belshazzar. Well, the spades of archeologists continued to do their work. In 1853, an inscription was found on a cornerstone of a temple built by Nabonidas, to the god Ur, which read: “May I, Nabonidas, king of Babylon, not sin against thee. And may reverence for thee dwell in the heart of Belshazzar, my first-born favorite son.” From other inscriptions, it was learned that Belshazzar and Nabonidas were co-regents. Nabonidas traveled while Belshazzar stayed home to run the kingdom. Now that we know that Belshazzar and Nabonidas were co-regents, it makes sense that Belshazzar would say that Daniel would be the third ruler. What a marvelous nugget of truth tucked away in the Word of God!
Explanation:
Please help! It has to deal with Newton's 3rd law! 30 points! and if right brainliest!
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Answer:
Newton's Third Law
His third law states that for every action (force) in nature there is an equal and opposite reaction
Explanation:
i have used it before but i dont know what it means WTH DOES AI MEAN
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Answer:
It stands for Artificial Intelligence
Explanation:
variables that affect the amount of current flowing in a circuit
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Answer:
In a closed electric circuit, resistance of the components and the voltage of a power source are affecting the electric current.