Answer:
c = 0.064 j/g.°C
Explanation:
Given data:
Mass of metal = 100 g
Initial temperature of metal = 250°C
Volume of water = 400 mL
Initial temperature of water = 15°C
Final temperature = 15.9°C
Heat capacity of metal = ?
Solution:
First of all we will calculate the heat lost by metal into water.
ΔT= 15.9°C - 15°C
ΔT= 0.9 °C
q = mcΔT
q = 400 g× 4.184 j/g.°C × 0.9 °C
q = 1506.24 j
Specific heat capacity of meta;
ΔT = 15.9°C - 250°C
ΔT = -234.1 °C
q = mcΔT
-1506.24 j = 100 g× c × -234.1 °C
(negative sign with q value indicate heat is lost by metal)
-1506.24 j = -23410 g.°C × c
c = -1506.24 j /-23410 g.°C
c = 0.064 j/g.°C
If the somatic cells of a dog contain 78 chromosomes, then after mitosis the new somatic cells would contain_____ chromosomes.
What type of bond is being formed in this polymerization reaction to link two amino acids together?
What does the sodium-potassium pump keep at a high concentration outside of the cell?
A. potassium
B. sodium
Answer:
B. sodium
Explanation:
2 potassium ions are moved inside the cell and 3 sodium ions are moved out. So there is more sodium on the outside of the cell.
Which of the following is made of cells?
Which of the following is made of cells A:rock B:snowflake. C:rain drop. D:leaf
Which structures are found in both prokaryotic and eukaryotic cells?
Cell membrane and cytoplasm/ cytosol
Cell membrane and nucleus
Cytosol/ cytoplasm and chloroplasts
Nucleus and mitochondria
Answer:
cell membrane and cytoplasm/cytosol
Explanation:
in an atomic model that includes a nucleus, positive charge is
Answer: The options are not given, here are the options.
a. located in the space outside the nucleus.
b. spread evenly throughout an atom. c. concentrated at multiple sites in an atom.
d. concentrated in the center of an atom.
The correct option is D.
concentrated in the center of an atom.
Explanation:
In an atomic model, the atomic particles has the nucleus which is located at the center of the particle. This nucleus contain positive charge which is called proton at the center and the neutrons(no charge). The electrons is located out side the particle she'll or nucleus and atomic particles become neutral because the number of protons is equal to the number of electrons which is negatively charge orbiting outside the nucleus.
what animals can be used to replace human parts?
cattle
sheep
goat
pig
Answer:
Pig
Explanation:
Pig valves are already used successfully in heart transplants. Human-to-human organ transplantation has only been around since the 1950s, and scientists have been working on animal-to-human transplants for almost that long. In the '60s, Keith Reemtsma experimented with transplanting chimpanzee kidneys into humans.
Answer:
Pig
Explanation:
This process is called Xenotransplantation. The animal organ, probably from a pig or baboon could be genetically altered with human genes to trick a patient's immune system into accepting it as a part of its own body. (Wikipedia)
Nucleotide are composed of phosphate group, a sugar , and a nitrogenous base. DNA is made up of long strands of nucleotide. which part if the above molecule can differ between nucleotide?
A- The Sugar
B- The Phosphate Group
C- The Nitrogenous Base
D- The Sugar and Phosphate Group
Answer:
C
Explanation:
The nitrogenous base can change
Will award 80 points
Gametes contain ______ copy/copies of each gene.
Two
Four
One
Thee
Answer:
one
There may be many possible alleles for any gene, but a diploid cell or animal contains only two alleles of each gene or two copies of a single allele; a haploid gamete contains one copy of each gene, so only one allele.
HELP MEEEEE PLEASEEE ASAPPPPP
how can a small change in energy use make a significant difference in CO2 emissions
Answer:
⬇️
Explanation:
small changes in energy use like switching to water & wind based systems can reduce carbon pollution and create a better energy creating source.
help pls lot of points
Answer:
I had to attach my response, as Brainly wrongly marked it as profane. I hope this helps!
correctly describe pH of a solution?
1. which of the following is a function of the nucleus?
stores DNA
stores sugars
builds proteins
packages proteins
2. which of the following statements about the nucleus is not true?
the nucleus stores the coded instructions for making the cell's proteins.
the nucleus usually contains a nucleolus region which where ribosome assembly begins.
the nucleus is the site of protein assembly.
the nucleus is surrounded by a nuclear envelope that lets materials in and out.
3. which organelle breaks down organelles that are no longer useful?
Golgi apparatus
lysosome
endoplasmic reticulum
mitochondrion
4. which of the following is a function of the cytoskeleton?
helps a cell keep its shape
contains DNA
surrounds the cell
helps make proteins
5. which of the following is a function of vacuoles in an animal cell?
convert energy
make proteins
store materials
break down molecules
pls help me! <3 :)
Answer:
1. Stores DNA
2. The nucleus is NOT the site of protein Assembly
3. Lysosome
4. Helps a cell keep its shape
5. Lysosomes store materials
Explanation:
what do you think is a way for geologist to locate ore bodies? justify your answer
Answer:
Explanation:
what do you think is a way for geologist to locate ore bodies? justify your answer
From my research, there is lots of information on how to extract ore, but I can't find any information on how these ore deposits are found in the first place, apart from 'looking for surface formations'. So, what kind of formations would exist for different types of ore? Are there any other ways of finding ore?
Two differences between hormones and the nervous system
Answer:
Hormones can be proteins, lipids or cholesterol-based molecules. Neurotransmitters are protein. The main difference between hormones and neurotransmitters is that Hormones are produced in the endocrine glands and released into the bloodstream where they find their movement targets at a distance from their origin. In contrast, Neurotransmitters are released into the synaptic space by a terminal of an excited presynaptic nerve cell and transmit a nerve signal to the neighboring postsynaptic nerve cell.
Explanation:
Answer:
the nervous system and endocrine system (hormones) is that the nervous system uses electrical impulses to send messages through neurons while endocrine glands use hormones to send messages to the target cells through the bloodstream.
All human body cells contain 46 chromosomes. However, sperm cells in men and egg cells in women have only 23 chromosomes. This is due to meiosis. How does meiosis accomplish the reduction in chromosomal number?
Answer:
Two cell divisions after DNA replication
Explanation:
After the DNA is replicated, the cell undergoes two rounds of meiosis to produce 4 cells, each wIth 23 chromosomes. This is how the cell goes from a diploid to a haploid state.
Why are certain constellations only visible during certain
times of the year?
Answer:
orion, big and little dipper and cancer.
Explanation:
Those are my thoughts I hope this helped.
what type of rock is this?
It's Sedimentary and the name of the rock is Conglomerate
Why is organic food better and healthy?
i am horrible at science. please help
breathing more deeply and frequently
Which is the role of restriction enzymes?
to isolate the selected gene
to cut DNA into fragments of different lengths
to move and separate the strands of DNA
to join the sticky ends of DNA fragments
Answer:
to cut DNA into fragments of different lengths
Explanation:
A restriction enzyme is a protein that recognizes a specific, short nucleotide sequence and cuts the DNA only at that specific site, which is known as restriction site or target sequence.
More than 400 restriction enzymes have been isolated from the bacteria that manufacture them. In live bacteria, restriction enzymes function to defend the cell against invading viral bacteriophages. Restrictions sites in the viral genome (a "happy accident" of nature, as far as the bacteria are concerned, since they don't appear to have any specific function in the virus) are cleaved by the bacterium's restriction enzymes, fragmenting and destroying the DNA of invading bacteriophages before it can incorporate into the host's genome and take over the cell.
A bacterium is immune to its own restriction enzymes, even if it has the target sequences ordinarily targeted by them. This is because the bacterial restriction sites are highly methylated, making them unrecognizable to the restriction enzyme.
Isn't evolution fantastic?
The correct answer is option C i.e. to cut DNA into fragments of different lengths.
what is restriction enzyme?A restriction enzyme is a bacterial protein that cleaves DNA sequences at sequence-specific places, resulting in DNA fragments with known sequences on both ends.
Certain laboratory processes, such as recombinant DNA technology and genetic engineering, require the use of restriction enzymes.
There are four different types of restriction enzymes: type I, II, III, and IV, which differ principally in structure, cleavage site, specificity, and cofactors.
Both restriction and methylase functions are carried out by a single big enzyme complex in Types I and III enzymes.
The restriction enzyme is independent of its methylase in the Type II system.
Several thousand type II restriction enzymes have been identified from a variety of bacterial species.
These enzymes recognize a few hundred distinct sequences, generally four to eight bases in length.
Type III restriction enzymes are a group of endonucleases that recognize a non-pallindromic sequence, comprising two inversely oriented sites.
Type IV restriction enzymes cleave only methylated DNA and show weak sequence specificity.
hence, the correct answer is option B.
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what does a cat eat
Answer:
meow mix
Explanation:
meow mix is a natural cat food mix for all breeds.
Which tectonic plate boundary caused the structure that is circled in the image?
Answer:
I'm guesssing it's B? I did this a very long time ago( two weeks ago)
Explanation:
Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges. While the process of forming these mountain ranges is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.
GIVING BRAINLIEST! THIS LESSON IS ON CIRCULATORY SYSTEMS
LOOK AT PICTURE! BE QUICK! <3
Answer:
1-Traveling is going from one place to another different place.
Circulating is going around the same place.
2- Abnormalities such as aneurisms or an arterial malformation, an abnormal malformation of the blood vessels or any internal injury.
Explanation:
Oklahoma saw 2 tornadoes, 57 lightning strikes, 9 inches of rain, and high winds every day this week.
Is this climate or weather????
Answer:
both at this point the temperature is gonna most likely be climate change and weather is going to be the raining the tornadoes and all tht other stuff you mentioned
Explanation:
How is static electricity created?
a. Two objects that are both positively charged repel each other and release
electric energy.
b. Two objects that are both negatively charged become attracted and create a
spark.
c.
Two highly conductive materials are placed within close proximity of one
another.
d. Friction between two objects causes a transfer of electrons from one object to
the other.
.
Answer:
d
Explanation:
So, when a person or any object has extra electrons, it creates a negative charge. These electrons thus get attracted to positive electrons (as opposite attracts) of another object or person and vice versa. The shock that we feel sometimes is the result of the quick movement of these electrons.
The rubbing of certain materials against one another can transfer negative charges, or electrons. For example, if you rub your shoe on the carpet, your body collects extra electrons.
Answer:
d. Friction between two objects causes a transfer of electrons from one object to the other.
Explanation:
If electrons are transferred by rubbing two objects together, the result of the friction is that one object becomes positively charged by losing electrons, and the other object becomes negatively charged by gaining them. This is known as static electricity.
Use the paragraph to answer the question. A team of biologists has been investigating fireflies to determine the cause of their declining population. Habitat loss is the most likely factor in the decline of the bioluminescent bug. Light pollution also plays a role. Excessive light disrupts the insect’s mating ritual. Write one to two sentences giving an example of technical language in this paragraph and explaining how it affects the overall meaning of the paragraph. (2 points)
Explanation:
Biologists have discovered that the reason behind the decline of fireflies is habitat loss, light pollution and excessive light; excessive light can disrupt the insects mating ritual.
are there more tissues or more organs in your body? explain your reasoning.
Answer:
More tissues.
Explanation:
Each organ is made up of several different types of tissue. Therefore, for every organ in the body, there are many more tissues.
Which word best describes the hot, weak, inner part of the upper mantle, which can flow?
lithosphere
asthenosphere
crust
core
Answer:
asthenosphere
Explanation:
3. How does oxygen cross into the cell?
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
The oxygen cross into the cell as water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion has been one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
What is osmosis?
Osmosis has been the process in which molecules of the solvent pass via a semipermeable membrane from a lower concentrations to higher concentration or from less concentrated solution to high concentrated solution. In the process of the osmosis movement of the water takes place.
There are mainly three types of the osmosis and these are hypertonic, hypotonic, and isotonic. The process of osmosis has been passive transport as water moves from low solute concentration to high solute concentration.
Osmosis has been also known as diffusion of water or solvent via a membrane which allows only selective substance to go across the channel. The process of osmosis does not require ATP because it is a passive process.
Therefore, The oxygen cross into the cell as water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion has been one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
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