Claim: Sound is not matter. Which piece of evidence supports this claim?
Sound is made of atoms and has a specific density.
Sound is created when molecules vibrate in a medium,
Sound takes up space and can be weighed on a scale.
Sound does not have mass or volume, it is a form of energy.
Answer:
Sound Energy is a form of Mechanical Energy
How do heatwaves show physical and chemical changes
Answer:
An example of heatwaves showing physical and chemical change is with a burning candle, when a candle burns, there is both a physical and chemical reaction.
The physical change is quite obvious and in fact, it can be seen. When the candle burns, the wax slowly melts and the candle gets smaller and smaller. This wax, as can be seen, will drip onto the candle and stick to it. When this wax forms back into a solid and stays on the candle, that is another physical change that can occur.
The chemical reaction can be a little less obvious. The first is that the heat produced by the candle consumes both the oxygen around it, as well as the fuels coming from the flame. This will then lead to carbon dioxide emissions produced by the flame, which by the way should never be inhaled. This is the chemical change that takes place in the reaction.
How much work does Bobby perform in pushing a 35 N crate a distance
of 4 meters?
Answer:
Here's the answer pretty thang = 140 N
Explanation:
List Known Values-
35N
4M
Formula-
W=FJ
Substitution-
W= 3.5N (4m)
Answer & Units-
140 N
Bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.
What is work?The work is something which need energy to be done it can be any physical or chemical energy that can be calculated with the help of Newton law.
Work is calculated by multiplying the force required for the work by the amount of movement of substance or object.
W = F × d here, W = work
F = force
d = distance
Substituting the value in the formula,
W = 35 × 4
W = 140 joules
Newton-meter is the same thing as a joule so the unit is joules.
Therefore, bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.
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what do carbon dioxide and global temperatures do together?
Answer:
When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down
Explanation:
Answer: when the carbon dioxide concentration goes up the temperature goes up. when it goes down the temperature goes down
Explanation:
The boiling point of a liquid is the temperature at which its ____________ _____________ is equal to ____________ ____________.(atmospheric pressure, vapor pressure
Answer:
vapor pressure, atmospheric pressure
Explanation:
the boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.
(I'm not too sure if this is right but I think it is)
What is the ratio of oxygen to carbon dioxide? 2 C2H6+7 O2=6 H2O+4CO2
Answer:
7:4
Explanation:
The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 4 and oygen is 7.
How many moles of magnesium are required to react with 2.0 mol of hydrochloric acid? The equation for this reaction is Mg + 2HCl → MgCl2 + H2.
Answer:
1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.
Explanation:
The balanced reaction is:
Mg + 2 HCl → MgCl₂ + H₂
The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products. That is, the law of conservation of mass implies that the sum total of charges before and after the chemical reaction remains constant.
The relationships between the quantities of reactants consumed and products formed depend directly on this conservation law, and therefore can be determined by an equation that describes them. This equality is called the stoichiometric equation.
In this case, by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), you have:
Mg: 1 moleHCl: 2 molesMgCl₂: 1 moleH₂: 1 moleThen, 1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.
Answer:
1 mole of magnesium, Mg
Explanation:
The balanced equation for the reaction is given below:
Mg + 2HCl —> MgCl₂ + H₂
From the balanced equation above,
We can see clearly that 1 mole of Mg requires 2 moles of HCl.
Thus, 1 mole of magnesium, Mg is needed for the reaction.
write importance of magnesium metal
Answer:
can be used in fireworks, flares and sparklers
Explanation:
as it burns in air it ignites with bright light
what element is solid at room temperature shiny malleable and a good conductor of heat
Answer:
I believe that it would be copper because copper is all of those things.
Explanation:
A company that is concerned about the environment wants to encourage the use of their fuel cell cars, so they are putting
together information to help sell the cars. They want to be sure their material is accurate. Which piece of information is
true about fuel cell cars?
O Fuel cell cars are cheaper to buy. Fuel cell cars reduce use of non-renewable fossil fuels
Fuel cell cars are more powerful than gasoline-powered vehicles.
Fuel cell cars allow for the safe storage of hydrogen gas at filling stations.
Answer:
B. Fuel cell cars reduce use of non-renewable fossil fuels
Explanation:
Select ALL that apply.
What factors affect wave height?
Lesson 2.14
Fetch
Strength of wind
Direction of the wind
Duration of wind
The factors affect wave height is the duration of the wind
Answer:
all answers are correct
Fetch
Strength of wind
Direction of the wind
Duration of wind
Explanation:
i took the quiz hope this helps!
someone who is good at chemistry please help me
Write a word equation and a formula equation for each chemical reactions
A) Solid calcium reacts with chlorine gas to produce solid calcium chloride.
B) Nitrogen gas reacts with solid Iodine to produce nitrogen triiodide gas.
Extra points if anyone can help me with those 2
Answer:
Blank 1 - Microscope
Blank 2 - Cell Theory
Explanation:
Answer:
microscope. and cell theory
Explanation:
with the invention of the microscope. scientists were able to create cell theory
If a 60-g object has a volume of 30cm3 what is its density
Answer:
2 g/cm3
Explanation:
Density is a measure of a substance's mass over its volume.
d = m/v
Therefore d = 60g/30cm3 = 2 g/cm3
Pls help i have no clue what the right answers are
Which element is the first element in group 13 of the periodic table of elements?
Answer:
Boron
Explanation:
Answer:
Boron
Explanation:
Boron is the first element of Group 13 and is the only metalloid of the group. Its chemical symbol is B, and it has an atomic number of 5. Boron has the electron configuration [He] 2s 2 2p 1 and prefers an oxidation state of +3. Boron has no natural elemental form; it forms compounds which are abundant in the Earth's crust.
2 spaceships are in deep space. The distance between the centers of mass of the two spaceships is 300 m, and the force between them is 5.51×10^-7N. If one spaceship has a mass of 24,000 kg, what is the mass of the other spaceship?
Answer:
Mass of the second spaceship is 3.10 × 10⁴ kg 0r 31000 kg
Explanation:
From Newton's law of universal gravitation, the force of attraction , F, between two bodies is directly proportional to the product of their masses and inversely proportional to the square root of the distance between them.
F = Gm₁m₂/d²
m₁ = 24000 kg
m₂ = ?
d = 300 m
F = 5.51 × 10⁻⁷ N
Gravitational constant, G = 6.67 × 10⁻¹¹ N.m²/kg²
Making m₂ subject of the formula : m₂ = F × d² / G × m₁
m₂ = 5.51 x 10⁻⁷ × 300 × 300 / 6.67 × 10⁻¹¹ × 24000
m₂ = 3.1 × 10⁴ kg
Therefore, Mass of the second spaceship is 31000 kg
A balloon takes up 625 L at 0°C. If it is heated to 80°C, what will its new volume be?
Answer:
Me gusta tu corte G
Explanation:
Photosynthesis is a process that can be performed by many autotrophic organisms within the ecosystem. Without photosynthetic organisms, the food chain would not be able to sustain the energetic needs of the ecosystem. Whic statement compares the energy transformations that occur in the ecosystem within photosynthetic organisms?
A Solar energy is converted to thermal energy, which increases food availability for the ecosystem.
B Solar energy is converted into chemical potential energy, which is found in the products like glucose.
C Chemical erlergy in carbon dioxide is converted into solar energy, which provides a mechanism to produce food for the ecosystem.
D Kinetic energy of the reactants is converted to potentia. energy in the products, which can be metabolized within the ecosystem.
Answer:
B.
Solar energy is converted into chemical potential energy, which is found in the products like glucose.
Explanation:
According to photosynthesis phenomena ,the statement which compares energy transformations in ecosystem within photosynthetic organisms is statement B.
What is photosynthesis?It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy through the process of cellular respiration.
Some of the energy which is converted is stored in molecules of carbohydrates like sugar and starches which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.
The process begins with proteins absorbing light energy which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.
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intrusive igneous rock forms when the cooling of magma takes place fast on the top of the Earth's surface. A. True B. False
Answer:
A
Explanation:
True igneous rock forms cooling of magma fast on the top
Answer:
The answer is A. True
Explanation:
What phase change occurs when a solid changes into a gas?
Answer:
Sublimation
Explanation:
Sublimation is the term used to describe when a solid "skips" the liquid phase and turns directly into a gas from solid form. Dry ice demonstrates sublimation when exposed to room temperature air.
A list of changes is shown.
Temperature decreases
Intermolecular bonds become weaker
Freezing
Intermolecular bonds become stronger
Evaporation
Temperature increases
Vibration of molecules slows down
Molecules vibrate faster
Which of the above changes would be accompanied by an increase of the kinetic energy of particles in a liquid?
A, B, C, and H
A, C, D, and G
B, E, F, and H
B, C, F, and G
Answer:
b,c,f,g
Explanation:
it makes the most sense plus i just took the test <3 good luck
With an increase in the kinetic energy of the solid molecule the intermolecular bonds become weaker, temperature increases, melting and molecules vibrating faster are changes.
What is the effect of the increased kinetic energy?Kinetic energy is the form of the energy that is present in an entity in motion. When the kinetic energy is increased then the temperature of the particles increases and leads to evaporation.
The increased kinetic energy weakens the intermolecular bonds of the liquid particles and the molecules of the particles start vibrating fast.
Therefore, option b. intermolecular bonds become weak, option e. evaporation, option f. temperature increases and option h. molecules vibrate faster are the changes.
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How are the four kinds of DNA nucleotides different from each other?
Answer:
The sugar in DNA is deoxyribose. ... Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. There are two groups of bases: Pyrimidines: Cytosine and Thymine each have a single six-member ring.
Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.
What are nucleotides ?Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the deoxyribonucleic acid and ribonucleic acid polymers, which are both crucial macromolecules for all kinds of life on Earth.
Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.
The quantity of phosphate residues that a nucleotide has determined its name. Adenosine triphosphate, for instance, is the name of a nucleotide that consists of an adenine base and three phosphate residues (ATP). Adenosine diphosphate would be the nucleotide if it has two phosphates (ADP).
Thus, Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA.
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Pls, Answer ASAP!!!! I have to turn in my HW in 20 mins!!
In the rocket fuel formulation for NASA, 325 grams of solid aluminum (Al) particles are heated with 211 grams of solid iron III oxide (Fe2O3). Show all work and units. Include significant figures in your final answer.
a) Write the balanced equation
b) Calculate the mass of iron produced from the reaction
c) Identify the limiting reagent
d) Determine the amount of excess reactant leftover
Show all work and units. Include significant figures in your final answer.
Answer:
B. Calculate the mass of iron produced from the reaction
Explanation:
Sana makatulong mark me as a brainliest
what are salt properties of matter?
Answer: Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Answer:
Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Explanation:
give the first answer brainliest, im just fixing thier spelling
WHAT IS THE CHEMICAL REACTION
Answer:
hi
Explanation:
Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.
-facts
What is electroluminescence? Give one example.
Answer:
electroluminescence is a production of light by the flow of electrons, as within certain crystals. An example is at most resataurants with a bright sign that either says open or closed.
Explanation:
How much energy is required to raise the temperature of 3 kg of iron from 20°
C to 25°C? Use the table below and this equation: Q = mcAT.
Answer:
The correct option is (c).
Explanation:
Given that,
Mass of iron, m = 3 kg = 3000 g
The temperature of ice increases from 20° C to 25°C.
The specific heat of iron is 0.45 J/g°C
We need to find the energy required to raise the temperature. The formula is given by :
[tex]Q=mc\Delta T\\\\Q=3000\times 0.45\times (25-20)\\\\Q=6750\ J[/tex]
So, 6750 J of energy is required to raise the temperature or iron.
3. Your friend's new car can go from 0 to 60 m/s in 7 sec. What is the acceleration?
Answer:
Initial velocity (u) = 0 m/s
Final velocity (v) = 60 m/s
Time (t) = 7 sec
Acceleration (a) = ?
a = (v-u)/t
a = (60-0)/7
a = 60/7
a = 8.57 m/s²
science question. Can you also tell me what weight has to do with the acceleration?