HDSJDHAJ SOMEONE HELP ME IM ABOUT TO FAIL MY SCIENCE CLASS
The characteristics of two methods of heat transfer are listed below:
Method A: Does not transfer heat through solids and requires a medium for heat transfer
Method B: Requires a material medium and transfers heat from the hot end to the cold end of a solid
Which statement is correct?
Answers
Answer:
Method A is radiation and Method B is convection.
Explanation:
hope this helps!
Pls mark as brainliest :)
B is convetion
Related Questions
Which statement best describes how increased predators affect the organisms in an area?
There will be fewer prey for other predators.
There will be more prey for all predators.
There will be reduced space for other predators.
There will be a lack of water for all predators.
Answers
The first one.
There will be fewer prey for other predators
Relate two factors that can limit the accuracy and precision of measurements.
Answers
Hope this helps
Temperature, humidity, pressure, gravity, altitude, vibration, stress, strain, and illumination are among the variables.
What are precision and accuracy?
Accuracy is the capacity of an instrument to measure the precise value. In other words, it refers to how closely the measured value resembles a reference or genuine value. Small readings can be taken to increase accuracy. The calculation's inaccuracy is decreased by the little reading.
The precision of a material is defined as the degree to which two or more measurements agree with one another. It is incredibly precise but not always accurate to measure something if you weigh it five times and get 3.2 kg each time. Accuracy is not necessary for precision.
The degree to which a measurement is accurate in relation to its real value. The degree to which the same results are produced by repeated measurements under the same circumstances is known as precision.
Therefore, temperature, humidity, pressure, gravity, altitude, vibration, stress, strain, and illumination are among the variables.
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In an electrical wire, if instead of copper, plastic wire is used. Would it conduct electricity?Justify your answer.
Answers
Answer:
No, a plastic wire would not conduct electricity. This is because plastic is an insulator that does not allow electric current to flow through it. In a wire, electrical conductivity is provided by the movement of charged particles - typically, electrons. Copper is an excellent conductor of electricity because it has a high number of free electrons that are not bound to atoms and can move through the wire very easily. However, in a plastic wire, the tightly bound electrons of its atoms do not allow for the free flow of charges, thus preventing the passage of electric current.
⚠️ILL MARK BRAINLIEST!⚠️
What is the speed of light? If light travels 31% slower in fiber optic line, how fast does light travel through the line?
Answers
help pls i will give brainlest
Answers
Answer: its 5ft tall and 12 inches
Explanation:
Please draw a diagram of how a magnetic field works around a magnet. Please label.
Answers
Mark me Brainly
Which statement is NOT true regarding natural vs. synthetic materials?
A) An example of a natural material is sand.
B) An example of a synthetic material is nylon.
C) Synthetic materials are made from natural resources.
D) Synthetic materials only have a negative impact on society.
Answers
Answer:
Option C
Explanation:
Answer:
Option C
Explanation:
Calculate: What is the population density of the flamingos in the pond below?
Group of answer choices
20 flamingos per square meter
0.4 flamingos per square meter
2.5 flamingos per square meter
20 flamingos per 6 square meters
Answers
Answer: Not known
Explanation: There is not enough details to solve this question.
What would happen to the gravity between two objects if the mass of one object decreased?
1. gravity would increase
2.gravity would decrease
3. wouldn't change
PLz help
Answers
What is the kinetic energy of the 2 kg ball just before it hits the ground, travelling 28 meters per second?
Use this formula: KE=0.5mv²
Kinetic Energy (KE) is measured in Joules (J)
Mass (m) is measured in kilograms (kg)
Velocity (v) is measured in meters per second (m/s)
A) KE = 0.5 x 28 x (2)2 = 556 J
B) KE = 0.5 x 2 x 28 x 2 = 56 J
C) KE = 0.5 x 2 x (28)2 = 784 J
D) KE = 28 x 2 x (0.5)2 = 14 J
Answers
Answer:
The correct answer is C) KE = 0.5 x 2 x (28)2 = 784 J.
This is because the kinetic energy of an object is equal to one half times the mass multiplied by velocity squared.
In this case, the mass of the ball is 2 kg and the velocity is 28 m/s, so the equation would be KE = 0.5 x 2 x (28)2 = 784 J.
Answer:
KE = 784 J
Explanation:
ke= 0.5x2kgx28m/s
What was one was one important impact of Supreme Court's ruling in Bush v. Gore
Answers
Answer: the answer is b or c
Explanation:
I took it
Hello, could you help me to answer this question. Thank you very much, it would save me!
Answer the question, "Why is it best to put subscripts next to the symbols in the density and solubility formulas?"
Answers
The number of atoms of each kind is indicated by a subscript following the atom. If there is only one atom, no number is written. If there is more than one atom of a specific kind, the number is written as a subscript following the atom.
Winds, ocean currents, storms, and hurricanes all begin with the _____ heating of the Earth by the Sun.
gravitational
even
magnetic
uneven
Answers
Answer:
Gravitational
Explanation:
I pretty sure it's Gravitational correct me if I'm wrong.
It is uneven because the Earth rotates around the sun. During its rotation, some parts of the earth don't receive sunlight so the heating is uneven
What type of person studies and collects data on the weather?
Answers
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objectives(s):
In your own words, what is the purpose of this lab?
Hypothesis:
In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.
Data:
Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.
Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One
Moon Two
Planet One
Planet Two
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?
Answers
What could cause the weather to change suddenly like this: It was a calm and cloudy spring day in this Utah town. Suddenly the clouds grew dark and heavy, and a storm covered the town in a blanket of snow
Answers
Answer:
heres the answer: Daily changes in the weather are due to winds and storms. Seasonal changes are due to the Earth revolving around the sun, differences in temperature create a restless movement of air and water in great swirling currents to distribute heat energy from the Sun across the planet.
Explanation:
if this is wrong i am genuinely sorry.
Human obtain electricity through fossil fuel, nuclear, solar, geothermal, wind, biomass, and hydroelectric power.
For at least two of these, explain ways that using this resource could pollute freshwater.
Answers
For fossil fuel: Oil spills and leaks during extraction or transport can pollute water sources.
For nuclear power: An uncontrolled nuclear reaction can result in widespread a contamination of water.
On the following periodic table of elements, what do these colors represent?
blue - -Nonmetals
red- -Metals
yellow- -Metalloids
Answers
Answer:
blues are nonmetals (gas)
yellows are metalloids (liquids)
reds are metals (solids)
Explanation:
good luck, hope this helped <3
What causes change to ecosystems and when changes to the living or nonliving things occur, what is the impact on the populations of that ecosystem?
(please write 2-3 sentences)
Answers
Answer:
Important direct drivers include habitat change, climate change, invasive species, overexploitation, and pollution. Most of the direct drivers of degradation in ecosystems and biodiversity currently remain constant or are growing in intensity in most ecosystems
Explanation:
Important direct drivers include habitat change, climate change, invasive species, overexploitation, and pollution. Most of the direct drivers of degradation in ecosystems and biodiversity currently remain constant or are growing in intensity in most ecosystems
Respiration occurs in humans when an egg cell from a female combines with a sperm cell from a male. True or false?
true
false
Answers
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Respiration occurs in humans when an egg cell from a female combines with a sperm cell from a male. True or false?\( \huge \bold \pink{Answer}\)
FalseAnswer:
im pretty sure its false, i think its Fertilisation that occurs
Explanation:
Drag each label to the correct location. Match the climate zones to their relative temperature levels. (coldest zonehottest zonemoderate temperature zone)
Answers
Answer:
Polar Zones - Coldest Temperature
Temperate Zones - Moderate Temperature
Tropical Zones - Hottest Temperature
Explanation:
The closer you are to the Equator, the hotter it gets, as the sun hits the middle of the Earth the most. At the poles, the sun hits it there the least, so it is the coldest. In between, we would have a mild between hot and cold.
*Remember that the Earth is at a tilt, and that is why we have seasons and why the Equator is so hot and the Poles are so cold.
Answer:
I answered the question on edmentum and that person was correct.
Explanation:
The polar zone is the coldest because the Sun’s rays hit this part of Earth at a wide angle, causing their energy to be spread thinly over a large surface area.
The topical zone is the hottest because the Sun’s rays hit this part of Earth nearly straight on, focusing the heat on a small surface area.
The temperate zone experiences moderate temperatures because the Sun’s rays hit this zone at an angle that concentrates the heat on a surface area that is smaller than on the polar zone and larger than on the tropical zone.
Characteristics of Analog and Digital Signals
There are two types of electronic signals: analog and digital. Both signals transmit information and data, but they work in different ways.
A waveform is a visual form of a signal. It tells about the shape and characteristics of a signal in the form of a wave.
Compare and contrast the analog and digital waveforms shown. How are the waveforms similar? How do they differ? What characteristics of each wave can you identify from its waveform?
Answers
The waveforms of analog and digital signals are similar in that they both exhibit changes over time, and they can both be represented graphically as waveforms.
However, the waveforms of analog and digital signals differ in several ways. Analog signals have a continuous range of values, which means that the waveform can take on any value within a certain range. This results in a smooth and continuous waveform, with no discernible steps or levels.
Digital signals, on the other hand, have a limited set of discrete values. These values are typically represented as binary numbers (0s and 1s), and the waveform consists of a series of distinct voltage levels or pulses that represent these numbers.
Some characteristics of analog waveforms that can be identified from their waveform include amplitude (the height of the wave), frequency (the number of cycles per second), and phase (the relationship between the wave and a reference point).
Similarly, digital waveforms can be characterized by their pulse width (the duration of the pulse), pulse amplitude (the voltage level of the pulse), and the timing of the pulses relative to a clock signal.
In summary, analog signals are continuous and can take on any value within a range, while digital signals are discrete and represent data as a sequence of numbers. The waveforms of these signals can be similar in appearance, but they differ in their characteristics and the way they represent and transmit information
ayo. answer this. pls & ty.
Improvements in technology over centuries enabled scientists to develop the cell theory. Rearrange the events below into the correct order. Place the oldest event at the top and the most recent event at the bottom.
Answers
British scientist Robert Hooke made the discovery of the cell in 1665. Under his custom-built microscope, he examined cells in a cork slice and discovered compartments that resembled honeycombs. He named them “cells.” Thus, option C is correct.
What scientist little idea about structure of an organism?In 1665, a British scientist by the title of Robert Hooke gave these minuscule units of life the name “cell.” One of the first scientists to examine living creatures under a microscope was Hooke. Hooke was able to make a significant discovery despite the weak microscopes of his day.
Our understanding of this realm of life dates back to the late 17th century, when Dutch scientist Antonie Van Leeuwenhoek, regarded as the father of microbiology, discovered single-celled organisms similar to them in still fresh water.
Therefore, scientist had little idea about the structure of an organism.
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A leaf on a tree stars moving when the wind blows on it how is this an example of newton's first
A. the wind exerts a force on the leaf causing its motion to change
B the wind exerts no net force on the leaf because it is not a push or pulls
C. the leaf stops moving even though the wind continues to blow
Answers
Sometimes fossils can be found in sedimentary rocks. Which statement best explains why?
Answers
Answer: ITS A
Explanation: HOPE THIS HELPS
help me with these questions pls thanks :)
Answers
Answer:
1. 2 valence electrons 2. 1 valence electron
Explanation:
valence shell is the elctrons present on the outer most shell
2. 1 valence electron
3. 8 valence electrons
Valence electrons are the ones on the very outside ring. Hope this helps!
Why do scientists use spiral tubes instead of straight ones?
Answers
Answer:
Heat and mass transfer of a LiBr/water absorption heat pump system (AHP) was experimentally studied during working a heating-up mode. The examination was performed for a single spiral tube, which was simulated for heat transfer tubes in an absorber. The inside and outside of the tube were subjected to a film flow of the absorption liquid and exposed to the atmosphere, respectively. The maximum temperature of the absorption liquid was observed not at the entrance but in the region a little downward from the entrance in the tube. The steam absorption rate and/or heat generation rate in the liquid film are not constant along the tube. Hence the average convective heat transfer coefficient between the liquid film flowing down and the inside wall of the tube was determined based on a logarithmic mean temperature difference between the tube surface temperature and the film temperature at the maximum temperature location and the bottom. The film heat and mass transfer coefficients rose with increasing Reynolds number of the liquid film stream.
How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)
a. The atom’s volume increases.
b. The atom’s mass increases.
c. The atom becomes positively charged.
d. The atom becomes negatively charged.
Answers
c. The atom becomes positively charged
if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom
This substance attaches to oxygen and carbon dioxide gas in the blood.
Answers
Answer:
If given a choice between blood cells, hemoglobin, plasma, platelets, the correct answer would be hemoglobin. Otherwise, the correct answer is hemoglobin.
The eye symbol represents Which hazards
Answers
Answer:
This one should be REALLY easy for everybody to know but the answer is anything that can pose a hazard to your eyes
Explanation:
Answer:cyclone
Explanation: