Answer:
Half-Life is the time for a substance (U-235 in this case) to decay to 1/2 its original mass.
Since the problem is asking for the time for U-235 to decay to 1/2 its original mass (100 grams to 50 grams) then the decay time is 1 half-life, or 700 million years.
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Answer:
A stone artifact that formed 700 million years ago
Explanation:
By the details it is said that Uranium-235 was 700 million years old, so it would make sense for it to be stone since it is stone like.
What makes up the highest percentage of soil composition?
A.) Mineral matter
B.) Water
C.) Air
D.) Organic matter
Answer:
D
Explanation:
^
The one that makes up the highest percentage of soil composition is mineral matter. The correct option is A.
What is soil composition?In soil science, a soil type is a taxonomic unit. A distinct soil type is formed by all soils that share a specific set of well-defined properties.
Soil type is a technical term for soil classification, which is the science of systematic categorization of soils. Every soil on the planet belongs to a specific soil type.
The composition of the soil is an important aspect of nutrient management. Soil water is what readily provides nutrients for plant uptake, whereas soil minerals and organic matter hold and store nutrients.
A typical soil contains about 45% mineral matter, 5% organic matter, 20-30% water, and 20-30% air. These percentages are, at best, broad strokes.
Thus, the correct option is A.
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URGENT!!
In addition to water, which of the following substances are polar?
A. Oil
B. Sharpie Marker
C. Butter
D. Nail Polish
E. Sugar
Answer:
Sugar
Explanation:
Sugar is the only polar substance here
Answer:
E: sugar
Explanation:
Fats and oils are nonpolar so its not oils or butter.
Most inedible or permanent inks like sharpie are nonpolar so its not sharpies.
Nail polish has a number of ingredients one is resin, which is nonpolar. The answer is sugar.
describe the condition where lactase is not available pls uwu
Answer:
Lactose intolerance
Explanation:
Lactose intolerance occurs when your small intestine doesn't produce enough of an enzyme (lactase) to digest milk sugar (lactose)
3. What temperature and density changes occur in a fluid or gas material that cause convection to occur?
Answer:
There is an increase in density and a corresponding increase in the temperature of the fluid
Explanation:
The temperature and density changes occur in a fluid or gas material that cause convection to occur include increase in density and a corresponding increase in the temperature of the fluid.
This is because convection involves the movement of fluids from a hotter area to a colder area and hot fluids usually have a lower density.
Cell Questions part 2!
Will give brainlist
Answer:
12 is b
Explanation: ribosoms combine amino acids
1. how many chambers does the human heart have?
2. what close the valves in the heart and why should they do this?
3. what do we call a pulse?
4. describe blood capillaries
Your heart has four separate chambers that pump blood, two on the right side and two on the left.
2. When the ventricle relaxes, the aortic valve closes to prevent blood from flowing back into the ventricle. When the aortic valve is not working properly, it can interfere with blood flow and cause the heart to strain to send blood to the rest of the body.
3. In medicine, a person's pulse is a pressure wave caused by the expansion of the arteries as a result of the circulation of blood pumped by the heart.
4. Capillaries are tiny vessels that branch out from arterioles to form networks around body cells.
Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them.
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What change in volume is expected to result in a faster rate of diffusion ?
Answer:
When the cell increases in size, the volume increases faster than the surface area, because volume is cubed where surface area is squared. When there is more volume and less surface area, diffusion takes longer and is less effective
Explanation:
Hope this could help- Good luck ^w
What happens to a newly created
mountain as a result of weathering and erosion?
Answer:
Recent research has led to important new insights into how these most ... Mountains are created and shaped, it appears, not only by the movements of the ... uplift to a gradual slide into "old age" caused by slow but persistent erosion. ... Convergence of tectonic plates generally occurs in one of two ways.
Explanation:
Answer:
it desolves
Explanation:
i dont really knoe (=
What function are stomach cells adapted for
Answer:
The stomach is J-shaped and it can expand to temporarily store food. Partial digestion of the food takes place here. The churning action of the stomach muscles physically breaks down the food. The stomach releases acids and enzymes for the chemical breakdown of food.
Explanation:
NASA scientists have discovered a new planet which is approximately the same size as Earth but the mass is half as much as Earth’s. How would the weight of an astronaut on this new planet compare to his weight on Earth?
Answer:
Weight will decrease
Explanation:
1kg=10N
1/2kg=10/2N
0.5kg=5N
the astronauts weight will be reduced to half of it
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What process in prophase 1 causes DNA to switch
places on separate chromosomes?
Explanation:
Recombination Occurs During the Prolonged Prophase of Meiosis I. Prophase I is the longest and arguably most important segment of meiosis, because recombination occurs during this interval. For many years, cytologists have divided prophase I into multiple segments, based upon the appearance of the meiotic chromosomes.
Hope this helps!
Every population is part of a ___?
Help plz!! I'll mark brainliest!
Answer:
In statistics, a population is the entire pool from which a statistical sample is drawn. A population may refer to an entire group of people, objects, events, hospital visits, or measurements. A population can thus be said to be an aggregate observation of subjects grouped together by a common feature.
is Fat around organs
structure of cell membranes
protection
chemical messenger
Answer:
protection
Explanation:
The "fat" around the organs is called the "visceral adipose tissue." Its primary function is to "protect" the organs it encloses from injury. It also keeps the person warm especially when exposed to cold environments. Besides this, it also serves as a storage area for your calories in the body. Fat is not completely harmful as most people think.
This is the reason why it is not good to lose so much weight or become too skinny because losing some fat may be harmful to your organ's protection and heat regulation.
who is 27tb2926 and why is the person so hard to find
Answer:
I honestly have no clue. Sorry
Explanation:
A glacier advanced 12 feet during a 16-day period in January. The same glacier advanced 18 feet during a 24-day period in February.
Are the ratios of feet to days proportional for these two periods of time?
Drag and drop to correctly complete the statement.
Answer:
3 feet : 4 days
Explanation:
Ratio of feet to days in January: Ratio of feet to days in February:
12 feet to 16 days 18 feet to 24 days
Now let us reduce both to the lowest terms and compare;
Divide by 4 Divide by 6
3 feet : 4 days 3 feet : 4 days
For both time periods, the ratio of feet to days are the same.
Answer:
proportional
Explanation:
I took the test
What is meant by the term carbon footprint?
Answer:
Ah so you're in a predicament
Explanation:
Its A man
As many as 30 thousand ____ _______ become entangled in lost or discarded fishing nets or cargo straps each year.
Answer:
As many as 30 thousand fur seals become entangled in lost or discarded fishing nets or cargo straps each year.
Explanation:
Human activities cause many damages to marine mammals in general. One of these activities is fishery. The nests are intercepting the migratory routes of animals or are floating free in the sea after being discarded. They are extremely strong, so whenever animals get stuck on them, they might carry them for months or years, affecting their diving, foraging, feeding, and reproductive behavior. These nets might hurt the animals´ skin, producing a wound that will probably get infected.
A few years ago, at least 50,000 northern fur seals died per year after getting stuck in fishing nets. The populations of these animals decreased sharply, affecting their reproductive and growth rates. In the present, due to the decrease in their population size, the number of dead animals is around 30,000 per year. This reduction in death is only because there are much fewer animals every year.
What important role does fire play in a grassland biome?
Fire naturally occurs in a grassland ecosystem and it helps the environment stay healthy and strong. I promotes richer soil as well as gets rid of excess leaves scattered around. After a fire, grassland ecosystems can grow again and be better than they were before.
Answer: Fire is a natural part of the grassland ecosystem and helps maintain its health and vigor. It warms up the soil and reduces the leaf litter that accumulates each year, allowing sunlight to penetrate. ... After a fire, blackened fields quickly revive with new, green grasses and abundant, showy wildflowers. So, fire is important because it helps things grow better... sorry if i am incorrect...
hope this helps.. stay safe and have a great day!!! :D
Explain why it is important for progesterone to be released after ovulation. [3]
Answer:
Progesterone is the hormone released after ovulation. It is required to prepare the uterus to receive an embryo, should conception have occurred and having adequate levels after ovulation is essential in this process.
Explanation:
Look at the frames from Iqbal. Ghullah says, "You know what will happen to you if you leave your work!" Iqbal ignores his owner How does the author achieve his purpose of highlighting Iqbal’s bravery in these frames? by showing Iqbal helping others escape the factory owner by showing the factory owner making a deal with Iqbal’s family by showing the factory owner making a threat directed at Iqbal
Answer:
C-by showing the factory owner making a threat directed at Iqbal
Explanation:
The answer is C in Edge :)
Use the first letter of each term to match it to the correct statement
Options - Tulip, Crocus, Forcing,Daffodil,Stratification
16)_____causing the flower to bloom out of season
17)_____must be planted in pot with flat side facing out
18)_____must be planted in pot with half the bulb exposed
19)_____imitates the winter season by using refrigeration
20)___must be planted in pot covered with one inch of soil
HELPPPPPP
Answer:
16.) Forcing
17.) Crocus
18.) daffodil
19.) stratification
20.) tulip
Explanation:
Under what conditions can aerobic respiration be used as a means to generate the ATP needed to carry out cellular processes? (4 points)
Oxygen is absent; electron transport chain is not used.
Oxygen is absent; electron transport chain is used.
Oxygen is present; electron transport chain is not used.
oxygen is present; election transport chain is used,
Answer: oxygen is present; electron transport chain is used
Explanation:
Scientists count the number of organisms in the tallgrass prairie. Which trophic level would you
expect to contain the smallest number of organisms?
A. Producers
B. Primary consumers
C. Secondary consumers
D. Tertiary consumers
Scientists count the number of organisms in the tallgrass prairie. The trophic level would you expect to contain the smallest number of organisms is Tertiary consumers. Thus, option D is correct.
Who are known as producers?The organisms that are capable of making their food like plants are called producers. The organisms that feed on the producers are known as primary consumers. The primary consumers include all kinds of insects, caterpillars, termites, etc.
Tussock larvae would be a primary consumer. The organisms that feed on the primary consumers are termed as Secondary consumers. In this example, the birds are eating the primary consumer i.e tussock larvae, hence birds would be the secondary consumers.
Therefore, Scientists count the number of organisms in the tallgrass prairie. The trophic level would you expect to contain the smallest number of organisms is Tertiary consumers. Thus, option D is correct.
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Is there a link between the errors in mitosis and schizophrenia? helppppp pleaase
Answer:
sorry there is not link
Easy 15 points! Please put an explanation
How many atoms of oxygen are left after synthesizing oxygen molecules?
Answer:
Explanation:
2.
Both primary and secondary succession start by producing soil. True False
Answer:
True
Explanation:
Answer: false
Explanation:
Label the part of the cell membrane
Answer:
head molecule, a phosphate molecule, a glycerol and two fatty acid chain
Answer:
molecule, a phosphate molecule, a glycerol and two fatty acid chain
Explanation:
Identity the following
structure indicated
by the arrow
A Anticodon
B Amino Acid
C tRNA
D. Codon
Answer: Amino acid
Explanation:
Will give brainest!!!!
What part of the brain controls the activity level in the body that makes us excited during a competition?
a) The pheromones
b) The adrenal glands
c) The reticular formation
d) The pituitary gland
Answer:
adrenal glands
Explanation:
they produce adrenaline
facts about precipitation maybe like 2???
Answer:
1. In meteorology, precipitation is any product of the condensation of atmospheric water vapour that falls under gravity.
2. The main forms of precipitation include drizzle, rain, sleet, snow, graupel and hail.
3. Precipitation occurs when a portion of the atmosphere becomes saturated with water vapor, so that the water condenses and "precipitates".
Explanation: