Many dinosaur bones are radioactive. Because of this, they are usually painted over with lead paint. Postulate A reason for why some of these very old fossils would have a radioactive signal and where it might be coming from?
Plants perform photosynthesis and respiration. Dead plants are broken down and become part of the soil. Which of the following matter do plants help to cycle through ecosystems? Select one:
a. carbon only
b. carbon, oxygen, and nitrogen only
c. carbon and oxygen only d. carbon, oxygen, nitrogen, and water
Final answer:
The correct answer is "carbon, oxygen, nitrogen, and water". Plants are essential in cycling carbon, oxygen, nitrogen, and water through ecosystems via processes like photosynthesis, respiration, transpiration, and interactions with nitrogen-fixing bacteria.
Explanation:
Plants play a crucial role in cycling matter through ecosystems by participating in several biogeochemical cycles. During the photosynthesis process, they absorb carbon dioxide from the atmosphere and release oxygen, which is essential for the survival of most living organisms. Meanwhile, respiration in plants, animals, and decomposers returns carbon dioxide to the atmosphere. Plants are also involved in the water cycle through transpiration, and in the nitrogen cycle, through nitrogen-fixing bacteria that reside in the roots of certain plants like legumes. Therefore, plants help to cycle carbon, oxygen, nitrogen, and water through ecosystems.
Which is the Lewis structure of H3PO4
Derrick just got home from playing soccer on a muddy field. He is curious how different brands of laundry detergent compare in removing mud from clothes, so he sets up an experiment. In one laundry load, he puts his muddy socks with Brand A detergent. In the next load, he puts his muddy jersey with Brand B detergent. In the final load, he puts his muddy shorts with Brand C detergent. Afterward, he noticed that the jersey came out the cleanest. He concludes that Brand B is the best detergent for removing mud from clothes. Is his conclusion valid? A. No; Derrick was biased toward Brand B. B. No; there were too many variables in the experiment. C. No; there were too many controls in the experiment. D. Yes; the experiment was set up correctly.
When both the speed and direction of an object’s motion is known, what else is known?
the distance the object has traveled
the velocity of the object
the acceleration of the object
the average speed of the object
the correct answer the velocity of the object i will edit more just have to find me notes
PLEASE HELP!!
As a 15.1-gram sample of a metal absorbs 48.75 J of heat, its temperature increases 25.0K. What is the specific heat capacity of the metal?
A) 0.129 J/gK B) 1.95 J/gK C) 3.23 J/gK D) 7.74 J/gK
As a 15.1-gram sample of a metal absorbs 48.75 J of heat, its temperature increases 25.0K. [tex]0.129 \frac{\mathrm{J}}{\mathrm{g} \mathrm{K}}[/tex] is the specific heat capacity of the metal
Answer: Option A
Explanation:
Specific heat term explains the amount of heat needs to be added with unit mass in order to increase the temperature by a degree Celsius. Its formula is given by,
[tex]Q=m \times c \times \Delta T[/tex]
Where,
[tex]\Delta T=\text { final } T-\text {initial} T=25.0 \mathrm{K}[/tex]
[tex]Q \text { is the heat energy in Joules }=48.75 \text { Joules }[/tex]
[tex]c \text { is the specific heat capacity }[/tex]
[tex]m \text { is the mass of the metal }[/tex]
Plugging in the values
[tex]c=\frac{Q}{m \times \Delta T}=\frac{48.75 \mathrm{J}}{15.1 \mathrm{g} \times 25.0 \mathrm{K}}=\frac{48.75 \mathrm{J}}{377.5 \mathrm{g} \mathrm{K}}=0.129 \frac{\mathrm{J}}{\mathrm{g} \mathrm{K}}(\text { Answer })[/tex]
A (n) blank is a movement or trembling of the ground that is caused by a sudden release of energy when rocks move along a fault. Plz helpppp
Radio stations identify themselves by their position on the radio dial such as 90.1 and 93.3. This number is based on the number of waves or cycles that pass a fixed point in a specific unit of time. To which property of a wave does this identification number refer? A. loudness B. amplitude C. wavelength D. frequency
which is a scientific claim? At least 75 percent of the class will pass the physical science test today because they studied more than two hours for it. According to the star of the number-one teen TV show, crushed rosemary and olive oil spread over pimples will draw out the bacteria and prevent scarring. Plants fertilized once per week with Super Plant Food Formula have been shown in testing to produce twice as much fruit as plants that are not. Placing half-filled one-gallon jugs of water out on the lawn prevents moles from occupying the space underground.
Why doesn't peppermint improve your reaction?
Peppermint also has the ability to improve athletic performance as well as helping to improve reaction times.
Overall, peppermint can improve your mental awareness but, no, it does not actually make you smarter.
How much heat is lost when 350g of iron cools from 54.1 to 22.4oC? (The specific heat of iron is 0.450 J/g oC)
There is an old story about a king and his crown. The king hired a goldsmith to make him a crown a pure gold. After the king received the crown, he started to worry that the goldsmith might have cheated him. He thought maybe the goldsmith didn't use pure gold, maybe he used a mix of metals to save money. The king asked a man named Archimedes to figure out if the crown was pure gold or not. Archimedes reasoned that the density of a lump of gold and a crown of pure gold would be the same. How could he prove if that crown was pure gold without melting or otherwise destroying the crown?
Who can use scientific inquiry and what does it involve?
Answer:
Sample Response: Scientific inquiry is the process used to ask and answer questions about the natural world. It can be used by anyone and involves asking a question, performing an investigation, collecting evidence, providing explanations, and communicating the results.
Explanation:
sample from Edge
what is humus?????????????
What is the difference between a simile and a metaphor?
How is a watershed related to a river system
Answer:
The stream mouth is where a waterway streams into a bigger waterway, for example, another stream, a lake, or a sea. A watershed limit, likewise called a seepage isolate, marks the external most point of confinement of a watershed. A watershed is a tract of land depleted by a waterway and its tributaries.
A watershed, or a drainage basin, captures all the water from rain or snow fall, and directs it into a river or stream. A river system includes a main river and its tributaries. Together, the watershed and the river system form part of the hydrologic cycle, where a watershed feeds the river system, contributing to the overall flow of water on the earth's surface.
Explanation:A watershed is closely related to a river system as they are both integral parts of the hydrological cycle. A watershed, also known as a drainage basin, refers to an area of land where all of the water that falls as precipitation either drains off into the same place, typically a river, lake, or ocean. It captures the rainfall and snow melt and directs it into a single point, say a river or a stream.
On the other hand, a river system includes a river channel along with its tributaries (smaller streams or rivers that flow into the main river). The river system serves as the main transportation route of the water from the watershed. So, a watershed feeds a river system and together they contribute to the overall flow of water on earth's surface. For instance, the Amazon River system is fed by multiple small and large watersheds covering a large area of South America.
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Can you please answer 11-20 thanks
Pressure tells how much force is on an area.
12. The pressure exerted by Earth's atmosphere is air pressure.
13. The density of an object is its mass divided by its volume.
14. A(An) hydraulic device uses fluid to transmit a force.
15. The flow of smoke up a chimney is partly explained by Bernoulli's principle.
True or False questions
16. Water pressure increases as depth increases. True
17. Air pressure is measured using a barometer. True
18. The buoyant force acts in a downward direction. False
19. The buoyant force on an object is equal to the weight of the fluid the object displaces. True
20. Archimedes' principle explains how an airplane flies. False
What is the gravityThe buoyant force is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. It is caused by the difference in pressure between the top and bottom of the object. The pressure at the bottom of the object is greater than the pressure at the top because there is more fluid above it pushing down.
The magnitude of the buoyant force is equal to the weight of the fluid displaced by the object. This is known as Archimedes' principle. For example, if you place a ball in a cup of water, the buoyant force on the ball will be equal to the weight of the water that the ball displaces.
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see text below
Completion
Read each word in the box. In each sentence below, fill in the correct word or words. Not all words will be used.
mass
Bernoulli's principle
force
air pressure
gravity
hydraulic device
11. Pressure tells how much ---is on an area.
12. The pressure exerted by Earth's atmosphere is -----------
13. The density of an object is its ------------divided by its volume.
14. A(An) ----------uses fluid to transmit a force.
15. The flow of smoke up a chimney is partly explained by -----
True or False
If a statement is true, write true. If it is false, write false.
16. Water pressure increases as depth increases.
17. Air pressure is measured using a barometer. 18. The buoyant force acts in a downward direction.
19. The buoyant force on an object is equal to the weight of the fluid the object displaces.
20. Archimedes' principle explains how an airplane flies.
Which material is the most dense?
Number 10 plz :D tysm!!!
What is The temperature at which a substance changes from a liquid to a gas
A person who is interested in the brain and its functions might pursue a career in
A) endocrinology
B) gene therapy
C) neuroscience
D) sports medicine
Answer:
Explanat C nutro sience srry i f i did not help
At 685 mmHg pressure and 50°C, a gas has a volume of 5.35 L. If the volume of the container decreases to 1.25 L, what is the amount of the pressure change?
Answer:
The amount of the pressure change is 2,246.8 mmHg.
Explanation:
In order to determine change in pressure we have to find the pressure of the gas when it occupied 1.25 L of volume.
So,to calculate the new pressure, we use the equation given by Boyle's law.
This law states that pressure is directly proportional to the volume of the gas at constant temperature.
The equation given by this law is:
[tex]P_1V_1=P_2V_2[/tex] (at constant temperature)
where,
[tex]P_1\text{ and }V_1[/tex] are initial pressure and volume.
[tex]P_2\text{ and }V_2[/tex] are final pressure and volume.
We are given:
[tex]P_1=685 mmHg\\V_1=5.35 L\\P_2=?\\V_2=1.25 L[/tex]
Putting values in above equation, we get:
[tex]685 mmHg\times 5.35 L=P_2\times 1.25 L[/tex]
[tex]P_2=\frac{685 mmHg\times 5.35 L}{1.25 L}=2931.8 mmHg[/tex]
The amount of the pressure change = [tex]P_2-P_1[/tex]
[tex]P_1-P_2=2931.8 mmHg-685 mmHg=2,246.8 mmHg[/tex]
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH–] is 1 x 10–11 mol/L. Is this solution acididc, basic, or neutral? Show your work. (3 points)
Which of the following is true about an atom of iron and an atom of copper?
1 They have different masses.
2 Both have the same properties.
3 They have an equal number of protons.
4 Both have different types of sub-atomic particles.
OPTION 1 AND 4.
Iron and copper atoms differ in their atomic mass and the number of their sub-atomic particles. They do not exhibit the same properties or share an equal number of protons.
Explanation:The question is asking about the key differences between an atom of iron and an atom of copper. Here are the correct observations:
They have different masses. The atomic mass of iron is 55.845 while the atomic mass of copper is 63.546.Both have different types of sub-atomic particles. Although iron and copper have the same types of sub-atomic particles (protons, neutrons, and electrons), the number of these particles in each atom is different. Iron has 26 protons while copper has 29 protons.However, it's incorrect to say that both atoms have the same properties or have an equal number of protons as each atom's properties and number of protons are dictated by its atomic number and arrangement of electrons.
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Why might a rubber raft burst if it is left in the sun on a summer day?
Answer: This is because of increase in air pressure inside the rubber raft.
Explanation:
According to Gay-Lussac's Law: 'The pressure of the gas at constant volume is directly proportional to the temperature in Kelvins'.
[tex]Pressure\propto Temperature[/tex](at constant Volume)
or [tex]\frac{Pressure}{Temperature}=constant[/tex]
So, when we left rubber raft in a sun on a summer day temperature of the air inside the rubber raft increases due to which pressure of an air inside the rubber raft also increases. And by this increase in pressure rubber raft bursts.
Can you please answer 12 and 13 thanks
If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, what does that indicate? A. The gaseous outside of the sun contains oxygen. B. There is no oxygen in the sun. C. The sun burns its fuel using oxygen. D. The spectrum can be detected only by a radio telescope.
Answer:
the answer is A.
Explanation:
If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, this indicate that the gaseous outside of the sun contains oxygen.
What is spectrum?In physics, the term "spectrum" refers to the variation in light intensity with frequency or wavelength. A spectroscope is a device created for visual spectral observation, while a spectrograph is a device that captures or maps spectra.
Since all wavelengths are present, the spectrum of luminous solids is considered to be continuous. In contrast, the spectrum of burning gases is known as a line spectrum since it only emits a small number of wavelengths. If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, this indicate that the gaseous outside of the sun contains oxygen.
Therefore, the correct option is option A.
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The equation 24x2+25x−47ax−2=−8x−3−53ax−2 is true for all values of x≠2a, where a is a constant.
What is the value of a?
A) -16
B) -3
C) 3
D) 16
You observe heat, light, and sound released by a chemical reaction. This reaction is (2 points)
absorbing energy
consuming energy
exothermic
endothermic
hen car tires are on hot pavement for too long, the pressure inside will ___________ and the volume within the tire will _____________.