Answer:
27J
Explanation:
kinetic energy is1/2mv^2Why do fossil fuels such as crude oil contain varying amounts of nitrogen and sulfur? Pls help
Answer:
See explanation
Explanation:
Fossil fuels are formed from the remains of plants and animals that have been subjected to intense pressure during the carboniferous era. These plants and animal remains undergo the process of fossilization to yield the fossil fuels we have today such as crude oil.
Living organisms are composed of elements which include nitrogen and sulphur. Since these fuels originated from dead organisms, they also contain these elements found in living organisms.
Hence, fossil fuels such as; coal, crude oil, and natural gas contain 0.05%-0.5% sulfur and 0.5%-2.1% nitrogen.
Gas in a balloon occupies 3.3 liters. What volume will it occupy if the pressure is changed from 100 kPa to 90.0 kPa, if the temperature is held constant?
Answer:
3.7 L
Explanation:
Initial volume (V₁) = 3.3 L
Initial pressure (P₁) = 100 KPa
Final pressure (P₂) = 90 KPa
Final volume (V₂) =?
The final volume of the gas can be obtained by using the Boyle's law equation as follow:
P₁V₁ = P₂V₂
100 × 3.3 = 90 × V₂
330 = 90 × V₂
Divide both side by 90
V₂ = 330 / 90
V₂ = 3.7 L
Thus, the final volume of the gas is 3.7 L
Which of the following do not happen when an object is slowing down :
A. Is decelerating
B. Is constant
C. Has negative acceleration
D. Is decreasing its speed
How do we know if molecules have kinetic energy?
can someone help me with this? thanks
Answer:
1 mole of lithium is 7 grams. we know this from it's relative molecular mass.
if 1 mole is 7 grams then x moles is 0.56 grams
we can equate them by saying (1/x)=(7/0.56)
after cross multiplying, we get 7x=0.56, x will be equals to 0.56/7
x=0.08 grams
0.08 mole is your answer
Answer:
we have
1 mole of li =7g
now
5.6×10^-1g of li =1mole/7g×5.6×10^-1 g=0.08mole
What are resistors? please help
Answer:Resistor Basics
Resistors are electronic components which have a specific, never-changing electrical resistance. The resistor's resistance limits the flow of electrons through a circuit.
They are passive components, meaning they only consume power (and can't generate it). Resistors are usually added to circuits where they complement active components like op-amps, microcontrollers, and other integrated circuits. Commonly resistors are used to limit current, divide voltages, and pull-up I/O lines.
Resistor units
The electrical resistance of a resistor is measured in ohms. The symbol for an ohm is the greek capital-omega: Ω. The (somewhat roundabout) definition of 1Ω is the resistance between two points where 1 volt (1V) of applied potential energy will push 1 ampere (1A) of current.
As SI units go, larger or smaller values of ohms can be matched with a prefix like kilo-, mega-, or giga-, to make large values easier to read. It's very common to see resistors in the kilohm (kΩ) and megaohm (MΩ) range (much less common to see miliohm (mΩ) resistors). For example, a 4,700Ω resistor is equivalent to a 4.7kΩ resistor, and a 5,600,000Ω resistor can be written as 5,600kΩ or (more commonly as) 5.6MΩ.
Schematic symbol
All resistors have two terminals, one connection on each end of the resistor. When modeled on a schematic, a resistor will show up as one of these two symbols:
Resistor schematic symbols
Two common resistor schematic symbols. R1 is an American-style 1kΩ resistor, and R2 is an international-style 47kΩ resistor.
The terminals of the resistor are each of the lines extending from the squiggle (or rectangle). Those are what connect to the rest of the circuit.
The resistor circuit symbols are usually enhanced with both a resistance value and a name. The value, displayed in ohms, is obviously critical for both evaluating and actually constructing the circuit. The name of the resistor is usually an R preceding a number. Each resistor in a circuit should have a unique name/number. For example, here's a few resistors in action on a 555 timer circuit:
Answer: resistor is
Explanation:
A resistor controls the flow of the electrical current within a circuit. Resistors are made from materials like copper or carbon, which make it difficult for the electrical charges to flow through a circuit. The most common type of resistor is a carbon resistor, which is a general purpose resistor, best suited for lower-powered circuits.
What is the proper name for the common sunflower
Answer: Helianthus L. Sunflower
Explanation:
Answer: Helianthus L.
Explanation:
Students in Ms. King's science class are researching the history of the cell theory and will write a blog to show what they have learned. Which of the following is the best choice for the introductory sentence?
A scientific theory, like cell theory, does not change.
A hypothesis, such as one about cells, usually becomes a theory.
Scientific theories, like those written about cells, are not as important as scientific laws.
Scientific theories, such as cell theory, are based on well-supported observations of nature.
Answer:
A hypothesis, such as one about cells, usually becomes a theory.
Explanation:
Calculate the volume occupied by 2.00 moles of H2 at 300.0 Kand 1.25
atm
Answer:
39.4 Liters
Explanation:
Using the general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question;
P = 1.25atm
V = ?
T = 300K
n = 2.00mol
Using PV = nRT
V = nRT/P
V = (2 × 0.0821 × 300) ÷ 1.25
V = 49.26 ÷ 1.25
V = 39.41
V = 39.4 Liters
Analyzing models compare an atom’s structure to a ladder. Identify one way in which ladder is not a good model from the atom.
Answer:
Climbing a ladder assumes that you would touch/use each step only once. Electrons will take one layer that is empty first, and previous layers or "steps" will continue being filled with additional electrons only when every other layer is occupied by, at least, one electron.
Explanation:
A good analogy is what passengers in a bus do. Everyone tries to sit alone first and only when every pair of seats has a person already seated, people will use them as well, sitting next to each other.
The mass of an atom may be found by adding the
O protons and neutrons
O molecules
o electrons and protons
O atoms
Answer:
protons and neutrons
Explanation:
Which particles make up most of the mass of an atom?
i think Neuterons i am right
Answer:
I do not know srry
Explanation:
TICLA ruuis SLCLLICU 10115CI.
Question 3 (1 point)
Which option correctly ranks the states of matter from slowest to fastest particle
speed.
gas, liquid, solid
solid, liquid, gas
solid, gas, liquid
gas, solid, liquid
Please help!!! Will give brainlist
Identify the product of the hydrogenation of the following alkene: CH3 + H2 → A) OH B) CH3 CH3 C) Колата jo sono ue D)
What causes lava to not instantly melt ice sheets when it is poured onto it?
Answer:
Dry ice
Explanation:
Answer:
The lava doesn't melt through ice because the steam ice sits on top of a blanket of steam rather than on top of the ice itself. This means the friction between the lava and the ice is very low.
Explanation:
3. How does genetic variation allow humans to survive long-term? Which
type of reproduction is responsible for genetic variation?
Answer:
more genetic variation within a population usually enables more phenotypic variation.
Explanation:
Because natural selection acts directly only on phenotypes, Some new alleles increase an organism's ability to survive and reproduce, which then ensures the survival of the allele in the population.
Genetic variation lets the organisms survive long term as it increases the phenotypic and the genotypic variation. Genetic variation is due to the type of reproduction that involves two parents.
What is genetic variation?Genetic variation is the modification of the original genome of the organism by genetic recombination and mutation that can be beneficial in the survival and the natural selection process.
Reproduction involving two parents of the same species allow genetic variation as the process of independent assortment and crossing over of the chromosomes inherited from both creates species with different traits and genotype.
Therefore, the reproduction involving two parents results in genetic variation.
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Where is the potential energy to run the plant?
A 3
B
4
С
1
D
2
Answer: C
Explanation:
your well wisher
determine the velocity of a cart traveling at 135cm in 5.5s.
Answer: 0.245 m/s
Explanation:
So velocity = d/t or distance over time in this case m/s or meters per second. But BE CAREFUL you must remember to convert cm to m always so 135 cm= 1.35m and 1.35m/5.5s= 0.245m/s
Students report that the sky in their area has mostly cirrus clouds. What are most likely the weather conditions in the area?
rainy weather
dark, overcast (blocking the sunlight)
stormy weather
fair, pleasant weather
If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?
A.)0.0209 mol
B.)0.02 mol
C.)0.021 mol
D.)20.9 mol
The number of moles of solute in a solution is the product of the molarity and volume of the solution. The number of moles in 0.045 L of 0.465 M potassium bromide is 0.0209 mol. Hence, option A is correct.
What is molarity ?Molarity of a solution is the ratio of its number of moles of solute to the volume of solution in liters. Molarity is the most common term used to express the concentration of a solution.
Molarity is a colligative property thus depends on the amount of substance and it is temperature dependant.
molarity = no.of moles/ volume in L
Given that volume of the potassium bromide solution = 0.045 L
molarity = 0.465 M
then, number of moles of potassium bromide solute = molarity × volume
no.of moles = 0.465 M × 0.045 L = 0.0209 mol.
Therefore, there are 0.0209 moles of potassium bromide is present in the solution.
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Why does a DNA fingerprint require millions of copies of each DNA fragment
Answer:
Because it can identify a person.
A DNA fingerprint is a piece of DNA so distinct that it can prove a person's identity. These distinct areas can take on many different forms, but each form is unique to any one individual.
PCR allows the amplification of a single copy of DNA into millions of copies. However this technique requires that the DNA of interest already be of a known sequence in order to design primers that will specifically hybridize to the target DNA.
It is important as:
It's used as evidence in courts, to identify bodies, track down blood relatives, and to look for cures for disease.
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What happens when a chemical reaction reaches equilibrium
Which of the following describes wind direction?
Wind direction is reported by the direction from which it originates. For example, a north or northerly wind blows from the north to the south. Wind direction is usually reported in cardinal (or compass) direction, or in degrees.
An object was measured by a worker as 35.6 cm long, however, the manufacturer specifications list the length of the object at 35.0 cm. What is the percent error in the workers measurement?
How many copies of DNA do haploid cells have
Answer:
2 lol
Explanation:
The mass of an object is measured in grams or kilograms TRUE OR FALSE
Answer:
True
Explanation:
The bigger mass is measured in kilograms and smaller in grams
If the temperature of a chemical reaction was reduced, how could the reaction rate most likely be increased?
Group of answer choices
decrease the pressure acting on the system
add a chemical inhibitor
decrease the surface area of the reactants
increase the concentration of the reactants
Answer:
Increase the concentration of the reactants.
Explanation:
This question seems vague, but to put it simply, the reaction rate decreases with a decrease in temperature, so we need to find a way to increase the reaction rate again. When you lower temperature, the molecules are slower and collide less. So therefore, in other words, we need to find a way to increase the rate of collisions between molecules. When the temperature drops, if we increase the concentration of the reactants, we are able to increase the rate of collisions between molecules. As a result, reaction rate is increased once again.
If the temperature of a chemical change was reduced,the reaction rate could most likely be increased by increasing the concentration of the reactants.
What is a chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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what are some features of the deep sea vent ecosystem
(please help :) )!!!!!!!!!!!!!
Maybe this information is helpful:
The features of the ocean floor are not permanent, and are gradually changing over time due to the movement of tectonic plates. Most of the ocean floor features from close to where the plates are shifting either towards or away from each other. Marine ecosystems are found around parts of the ocean floor features, even the Mariana Trench, which is the deepest trench in the world.
What characteristics separate the class Insecta from other classes of the phylum Arachnida
Answer:
Three pairs of walking legs, wings, body divided into three segments, pair of sensory antennae.
Explanation: