Which of the statements about half-life are true?
(Select all that apply.)
A radioactive element's half-life decreases when the pressure upon it decreases.
A radioactive element's half-life stays the same when its temperature changes.
A radioactive element's half-life increases when its temperature increases.
A radioactive element's half-life decreases when the pressure upon it increases.
A radioactive element's half-life increases when its temperature decreases.
A radioactive element's half-life stays the same when the pressure upon it changes.
Answers
The statements which are true about half-life are given below:
A radioactive element's half-life stays the same when its temperature changes.A radioactive element's half-life stays the same when the pressure upon it changes.Thus, the correct options are B and F.
What is Half-life?The half-life of any radioactive element may be defined as the time taken for the radioactivity of a specified isotope to drop to half of its original value.
The above statement is true about the half-life of any radioactive element because the half-life of any substance does not depend on pressure, temperature, and concentration.
Therefore, it is well described above.
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Related Questions
CAN SOMEONE HELPP?????????
Answers
Answer:
ok I don't know if my ur office is not good at all but can you tell me these things
FILL IN THE BLANK. the___nervous system controls the skeletal muscles. sympathetic somatic parasympathetic autonomic afferent
Answers
The somatic nervous system is a component of the peripheral nervous system associated with the voluntary control of the body movements via the use of skeletal muscles.
What is nervous system?The somatic nervous system manages the movement of skeletal muscles. The motor cortex is the origin of conscious movement control (both premotor and primary motor cortex).
The somatic nervous system regulates voluntary movements, sends and receives sensory information, and participates in reflex actions independently of the central nervous system (CNS), allowing for extremely rapid reflex occurrence. Additionally, they have a history of accurately forecasting crucial life events like schooling and health.
The paraventricular nucleus is the primary hypothalamic region for the central regulation of the autonomic nervous system, which is controlled by the hypothalamus.
Skeletal muscle innervation and other voluntary activities are controlled by the somatic nervous system.
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If you burn wood in a fireplace, which type of energy resource are you using?
Answers
Answer:
Potential energy
Explanation:
Batteries, biomass, petroleum, natural gas, and coal are examples of chemical energy. Chemical energy is converted to thermal energy when people burn wood in a fireplace or burn gasoline in a car's engine.
Answer: Potential energy
Explanation:
Describe What changes do you see in the limb structure of the three animals above?
Answers
Answer:
The limb bones are similar across these species because they share a common ancestor.
Explanation:
The limb bones are similar across these species because they share a common ancestor BEST explains this common skeletal structure.
The three similar bone structures; humerus, ulna and radius that is found in the arm or forelimb of humans, horses, goats, and mice are known as homologous structures. These structures are found in different organisms and because of their similarity suggest that the organisms have evolved from a common ancestor. The structures are usually similar in form but they may not necessarily have the same function in the organisms.
1 Which of the following is a Eukaryotic cell?
A Bacteria
B Virus
C Animal/Plant Cell
D All of the above.
Answers
Answer:
a
Explanation:
Edgar and Alice both have blonde hair, which is a recessive trait. But their first child has brown hair. What is the most likely explanation
Answers
The most likely explanation for Edgar and Alice having a child with brown hair is that one or both of them carry a dominant allele for brown hair.
In this case, the most likely explanation is that one or both of the parents, Edgar and Alice, carry a dominant allele for brown hair. Hair color is determined by multiple genes, and the inheritance of hair color can be more complex than a simple dominant-recessive pattern.
It is possible that Edgar and Alice both carry a copy of the dominant allele for brown hair, which overrides the expression of the recessive allele for blonde hair.To have a child with brown hair, the child must inherit a dominant allele from at least one of the parents. Even if both parents have blonde hair, they can still carry the dominant allele for brown hair.When the child inherits a dominant allele from one parent and a recessive allele from the other, the dominant allele will determine the hair color, resulting in brown hair.It's important to note that other factors, such as genetic variations and interactions between different genes, can also influence hair color inheritance.
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Summarize the results of your experiments.
a. Riker Simpson had sample #12 which is
likely:
b. Jan Leavenworth had sample #6 which is
likely:
c. Fiona Folsom had sample #24 which is likely:
d. Quentin Stone had sample #13 which is
likely:
Answers
Answer:
Riker Simpson had sample #12 which is likely: gypsum
Jan Leavenworth had sample #6 which is likely: calcite
Fiona Folsom had sample #24 which is likely: diamond
Quentin Stone had sample #13 which is likely: halite
Explanation:
How many calories are required to heat 10 mL of water from 25 C to 35 C
Answers
Answer:
\(Q = 5,46,000\) joules
Explanation:
As we know
\(Q = mc \Delta T\\\)
Q is the Heat Energy
M is the mass of the substance releasing /absorbing heat
C is the specific heat capacity \(= 4200\) Joules per kilogram per degree
\(\Delta T\) is the change in temperature
Substituting the given values, we get
\(Q = 13 * 4200 * (35-25)\\\)
\(Q = 5,46,000\) joules
Which algae are considered as ancestors of land plants?
O Brown algaeO Red algaeO Green algaeO Blue-green algae
Answers
Land plants are thought to have descended from brown and green algae species.
The two most well-known types of green algae are chlamydomonas and spirogyra.
Brown algae: Laminaria and Fucus are both multicellular algae that are under the Phaeophyceae subclass, which also includes many different types of seaweed.
The brown algae are another name for this group of algae. The most prevalent pigment in them is chlorophylla.
The majority of brown algae are marine organisms that are crucial for providing food and habitat for marine life.
Around the world, there are 1,500–2,000 different types of brown algae. Ascophyllum nodosum, for example, is a species of brown algae that is both important for research and for commerce.
The majority of them contain the pigment fucoxanthin, which gives them various shades of greenish-brown. Bryophyta is the name for brown algae.
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what will happen if the relative humidity is 100 percent, and the temperature begins falling?
Answers
Answer:
It will start to rain.
Explanation:
I really need help pls! This is the question...
A sample of iron has dimensions of 2 cm x 4 cm x 6 cm and a mass of 100g. What is the density of the sample?
Answers
PLS HELP !!! DUE TONIGHT AT MIDNIGHT
Answers
Before designing a solution to protect an estuary, the conservation group should gather the following two pieces of information: Ecological Characteristics, and Threat Assessment.
1. Ecological Characteristics: The conservation group needs to understand the specific ecological characteristics of the estuary.
This includes information such as the biodiversity present, the types of habitats within the estuary, and the species that rely on the estuary for their survival.
2. Threat Assessment: It is crucial for the conservation group to assess the specific threats that the estuary is facing. This includes evaluating the extent and impact of invasive species.
The existing human structures or activities that are affecting the estuary, the level of pollution and its sources, and the potential consequences of climate change on the estuary's ecosystem.
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cross-fostering experiments with norway rat pups showed that in their response to stress,a) environment was the critical factor, not genetics.b) genetics was the only important factor.c) both genetics and the environment played a clear role.d) cross-fostered pups resembled their biological mothers more than their foster mothers
Answers
The correct answer is c) Cross-fostering studies with Norway rat pups demonstrated that both genetics and environment clearly influenced how the rats responded to stress.
Norway rat offspring used in cross-fostering studies have demonstrated that both heredity and surroundings affect how well they respond to stress.
Researchers were able to differentiate between hereditary and environmental variables that affect behavior in these studies because the moms who reared the rat offspring were genetically unconnected to them.
These studies' findings indicate that rodent behavior, including its stress reaction, can be significantly influenced by both heredity and environment. This indicates that a complicated interplay between environmental and genetic factors influences the formation of stress reactions.
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The fruiting body found above ground in fungi is called the
A. cap.
B. hyphae.
C. mycelium.
Answers
Answer:
fruiting body is called cap
The mycelium is the fruiting body found above ground in fungi.
The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp (fungal fruiting body) that supports a spore-bearing surface, the hymenium.
A hypha is a long, branching, filamentous structure of a fungus, oomycete, or actinobacterium. In most fungi, hyphae are the main mode of vegetative growth, and are collectively called a mycelium.
A mycelium is a network of fungal threads or hyphae. Mycelia often grow underground but can also thrive in other places such as rotting tree trunks. A single spore can develop into a mycelium. The fruiting bodies of fungi, such as mushrooms, can sprout from a mycelium.
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Select the parts that make up the backbone of the DNA molecule. Select the TWO answers that are correct. a. sugar b.glycine c.nucleoside d.phosphate e.nitrogenous base
Answers
The backbone of the DNA molecule is composed of sugar and phosphate groups. These components are connected by phosphodiester bonds, which alternate to form a long chain.
The correct answers to the question “Select the parts that make up the backbone of the DNA molecule” are a. Sugar and d. Phosphate. Sugar (deoxyribose) and phosphate molecules are the two primary components of the DNA backbone. The sugar and phosphate molecules alternate to form the long chain that makes up the backbone. The nitrogenous base, which is bonded to the sugar, extends away from the backbone and pairs with its complementary base on the opposite strand to form the DNA molecule's double helix structure. Nucleoside is a combination of a sugar molecule (ribose or deoxyribose) and a nitrogenous base. These components are used to create nucleotides. Glycine is an amino acid, which is a component of proteins, not DNA. The nitrogenous base is bonded to the sugar and extends away from the backbone, as mentioned above. However, it is not a component of the backbone itself, so it is not a correct answer to this question.
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Which religion placed emphasis on the worship of the emperor and was the official state religion of Japan?
1. Daoism
2. Shintoism
3. Buddhism
4. Hinduism
Answers
Help me out with this question
Answers
Answer:
the answer is B, hope this helps
Explanation:
explain what happens when a lipid ligand reaches a target cell and how the lipid ligand acts out a cellular response
Answers
when lipid ligand binds to the receptors, some conformational changes takes place which leads to responses.
This lipid ligand binding leads to signal transduction
lipid soluble hormones when diffuse through membrane they bind with receptors which is there in cytoplasm. the lipid receptor complex will now binds with gene this process is direct gene activation.
eg, steroid hormones
mrna is generated it enter cytoplasm and makes the protein.
lipid insoluble these do not bind directly to cell wall as they are insoluble therefore they bind to the secondary messenger which then bins to DNA the mrna is formed which leads to formation of proteins.
eg , peptide hormones
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1. What is a pendulum?
Answers
what do structures B and C have in common?
Answers
Which of these is an example of soil degradation?
A. A drought kills all the plants in an area, leaving bare land.
B. Fertilizers provide too many nutrients to crops.
C. Garbage is buried so the land can be reclaimed later.
D. Containers designed to store pollutants leak.
Answers
A. Soil deterioration occurs when a drought kills all of the vegetation in a region, resulting in barren ground. Soil degradation refers to a decrease in soil quality caused by processes such as erosion, compaction, salinization, acidity, and pollution.
Drought may cause soil degradation by lowering organic matter in the soil and causing erosion. This can lead to decreased soil fertility, water retention capacity, and biodiversity.
A lack of plants can also reduce the soil's ability to absorb and retain carbon, resulting in additional deterioration. Fertilizers are a good source enhancers and they help in growth of the crops by providing then the suitable type of nutritional growth and fulfilling deficiency.
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What did Dr. Goldberger do to provide evidence of the relationship between pellagra and nutrition?
Answers
Answer:
Dr. Goldberger began by seeing what would happen if he fed orphans a more complete diet (fresh vegetables, meat, and milk).
kuru is a neurodegenerative disease that was endemic to the fore people of papua new guinea. it was spread through the ritual practice of consuming the brains of deceased relatives. kuru is caused by a misfolded protein that causes normally folded brain proteins to change their conformation. infectious protein particles such as this are known as which of the following?
Answers
Kuru is a neurodegenerative disease that was endemic to the fore people of papua new guinea. Kuru is caused by a misfolded protein that causes normally folded brain proteins to change their conformation. Infectious protein particles such as this are known as prions.
What are Prions?This is referred to as a misfolded protein that can transmit its misfolded shape onto normal variants of the same protein.
They are responsible for causing diseases in animals and humans by triggering normally healthy proteins in the brain to fold abnormally which depicts Kuru and is the reason why prion was chosen as the correct choice.
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All of the following statements concerning cellular respiration are true EXCEPT:
a. In the citric acid cycle, two molecules of CO2 and one molecule of FADH2 are produced for each acetyl-CoA that
enters the cycle.
b. ATP is converted to ADP during two of the reactions of glycolysis.
c. When aerobes respire anaerobically, they may build up an oxygen debt that may be paid eventually by intake of oxygen.
d. The metabolic breakdown of glucose yields more energy during fermentation than during aerobic respiration
Answers
The metabolic breakdown of glucose yields more energy during fermentation than during aerobic respiration is FALSE.
Cellular respiration is a process of energy conversion in which food molecules are broken down to release energy, and this process occurs in both autotrophs and heterotrophs.
In autotrophs, the food molecules synthesized during photosynthesis are broken down to release energy; while in heterotrophs, the food molecules consumed from the environment are broken down to release energy. During cellular respiration, a series of oxidation-reduction reactions take place, which release energy from food molecules in the form of ATP.
There are three main steps in cellular respiration: Glycolysis, the Krebs cycle, and the Electron transport chain. All of the given statements concerning cellular respiration are true except for option d. The metabolic breakdown of glucose yields more energy during fermentation than during aerobic respiration, which is false.
Fermentation only yields 2 ATP molecules per molecule of glucose, while aerobic respiration yields 36-38 ATP molecules per molecule of glucose, so fermentation yields less energy than aerobic respiration.
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how to figure the scale diameter of a planet
Answers
Answer:
Planet diameter = 2p × (distance to the planet) × (planet's angular size in degrees)/360°. Planet volume = (p/6) × (planet diameter)3. Density = mass/volume.
Explanation:
how to find hybridization of an element
Answers
The hybridization of an element can be determined by looking at the number of electron pairs that are located in its outer shell.
To find the hybridization of an element, you need to follow the steps below:
Determine the total number of valence electrons in the molecule or ion.Draw the Lewis structure of the molecule or ion.Count the number of electron groups (lone pairs and bonds) around the central atom.Use the number of electron groups to determine the hybridization.Use the following guide to count the number of electron groups:
0 electron pairs = s-orbital hybridization 1 electron pair = p-orbital hybridization 2 electron pairs = sp-orbital hybridization 3 electron pairs = sp2-orbital hybridization 4 electron pairs = sp3-orbital hybridizationFor example, if an element has two electron pairs, its hybridization would be sp.
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1. Identify the input and output
for an washing machine.
2. Identify the organ-system components, and the input
and output, and describe the operation of the biological control
system consisting a hum
Answers
Inputs for a washing machine:
- Electricity to power the motor, drum, pump and other components
- Water from the water supply
- Detergent and fabric softener added by the user
- User settings for the wash program (hot/cold, water level, spin speed etc)
Outputs from a washing machine:
- Clean clothes
- Wastewater drained out
- Some noise from the motor and drum spinning
The organ-system components of the biological control system for a human are:
Inputs:
- Sensory inputs from eyes, ears, skin, tongue etc which provide information about external environment and internal body states
Components:
- Nervous system (brain, spinal cord, nerves) which processes input and coordinates responses
- Endocrine system (glands) which secretes hormones to regulate processes
Outputs:
The system provides:
- Muscle movements and actions as output responses
- Gland secretions like tears, sweat and saliva as outputs
- Physiological changes in heartbeat, breathing and digestion as outputs
The overall operation is that inputs are detected, processed by the brain and nervous system, which then coordinate output responses via muscles, glands and organs to maintain homeostasis and adapt to the environment. The endocrine system assists the nervous system by secreting hormones that induce slower but longer-term responses.
When water is turned on in a shower, the shower curtain moves towards the water. This has to do with surface tension. capillary action. pressure of a moving fluid. heat capacity. none of these
Answers
When water is turned on in a shower, the shower curtain moves towards the water due to the pressure of a moving fluid.
The water coming out of the showerhead has kinetic energy and exerts a force on the air in front of it. This creates an area of lower pressure immediately in front of the water stream. The higher atmospheric pressure outside the shower pushes the shower curtain towards the lower pressure area, causing it to move towards the water. This phenomenon is known as the Bernoulli's principle, which states that as the velocity of a fluid increases, the pressure within the fluid decreases. It is not related to surface tension, capillary action, or heat capacity.
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Complete Question
When water is turned on in a shower, the shower curtain moves towards the water.
This has to do with surface tension.
capillary action.
pressure of a moving fluid.
heat capacity.
none of these
What’s wrong with it
Answers
Answer: It looks pretty good to me.
Explanation:
Which animal eat the men
Answers
carnivores are those animals who feed on other flesh for its survival
they include :
lions, tigers, leopards, polar bears, crocodiles
hope this helps u out and Mark the brainliest