Answer:
Physical and chemical changes are different because one deals with changes to ones shape or form, while chemical is changing one substance to another.
Explanation:
A example of a physical change would be cutting a block of wood into a cube of would, its physical change changes from a block to a cube. A chemical change is changing the substance into another substance so for example, burning that cube of wood in a fire. The fire is burning the wood into ash meaning it's no longer wood but ash.
Hope this helps.
Define exothermic reaction.
Define endothermic reaction.
Answer:
An exothermic reaction is a chemical reaction that releases heat energy to the surroundings. This means that the overall energy of the products is lower than the overall energy of the reactants, resulting in a net release of energy in the form of heat. This can be observed as an increase in temperature of the surroundings or an increase in the motion of the reactant particles, as they absorb the energy that is released. Examples of exothermic reactions include combustion, oxidation, and many biochemical reactions.
Explanation:
What is a real world application of understanding the difference between prokaryotic cells and eukaryotic cells?
Being able to identify them with your naked eye
Differentiating between animal and human cells.
Understanding the treatments casued by different infections.
Being able to identify bacterias habitat.
Answer:
FIRST ONE
Explanation:
Need this asap ill mark brainliest On the Internet, many authors post opinion articles on scientific topics. What are the benefits and drawbacks of these opinion articles in regard to scientific discussion?
Answer:
A benefit of the opinion of a scientific author is that you can see others points of view on a subject. A drawback is that they are using an opinion and most likely not stating unbiased facts.
Explanation:
Hope this helps
Answer:
Highlights:
*Researchers in the sciences do not see access to the scientific literature as an especially important problem.
*Authors consider factors such as journal reputation and the absence of publication fees when deciding where to submit their work. In contrast, free access is not a significant factor in their submission decisions.
Implications:
*While open access has the potential to expand the authorship and readership of the scientific literature, that potential has not yet been realized.
*Librarians who encourage scientists to publish in open access journals should be aware of the authors' priorities and perspectives. Authors in the sciences tend to focus on citation impact, reputation, and accessibility to a specialized readership—not breadth of readership, copyright, or access status.
*Journal publishers that charge publication fees may want to consider alternative sources of revenue. Authors' resistance to publication fees is a major barrier to greater participation in open access initiatives.
Explanation:
The diagram shows a generator powered by a water turbine. Based on the diagram, what type of energy transformation takes place in the generator?
A
Mechanical energy is transformed into electrical energy.
B
Chemical energy is transformed into kinetic energy.
C
Electrical energy is transformed into potential energy.
D
Electrical energy is transformed into chemical energy.
The transformation takes place in the generator is mechanical energy is transformed into electrical energy. Hence option A is correct.
What is energy transformation?Energy transformation is defined as the conversion of energy from one form to another. The passage of energy from one place to another is known as energy transfer. When energy transforms, it goes from one type to another.
Hydroelectricity is a type of renewable energy that produces electricity by harnessing the force of moving water. Mechanical energy is transformed into electrical energy in a generator. Most generators create alternating current as their source of electricity. A generator spins when a turbine's blades rotate due to falling water, converting the mechanical energy of the spinning turbine into electrical energy.
Thus, the transformation takes place in the generator is mechanical energy is transformed into electrical energy. Hence option A is correct.
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✿
All substances taking part in a certain interaction are shown below:
Carbonate = Calcium Oxide + Carbon Dioxide
Calcium Oxide equals: 112 G
Carbon Dioxide equals: 88 G
Which of the following is the correct estimate of the amount of calcium carbonate used in the interaction?
A. Sum of 112 g and 88 g
B. Difference between 112 g and 88 g
C. Twice the sum of 112 g and 88 g
D. Twice the difference between 112 g and 88 g
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any help is much appreciated <3
will reward brainliest to the correct answer (•◡•) !
Answer:The Law of Conservation of Mass simply states that the total amount of mass should not change in a chemical reaction that is isolated (no other objects can enter the reaction). The total mass of the reactants must be equal to the total mass of the products. Thus, the correct estimate of the amount of oxygen used in the interaction is the difference between 133 g and 29 g.
Explanation: I hope this helped!
How are strato volcanoes different from shield volcanoes?
Strato volcanoes are more explosive than shield volcanoes.
Strato volcanoes are only found by oceans and shield are not.
Shield volcanoes are always larger than strato volcanoes.
Shield volcanoes only produce ashes and strato volcanoes only produce lava.
Answer:
b
Explanation:
i got it right on USA Test prep
Whats the effect of this?
A wave enters a medium where its wave speed is slower.
Answer:
Wave speed, frequency and wavelength in refraction
Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.
Explanation:
havvee advvanncceed
Answer:
Waves. Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. Light is refracted when it crosses the interface from air into glass in which it moves more slowly.
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☆
Is mass conserved when 10 g of sodium hydroxide undergoes a chemical change during an interaction with 57 g of copper sulfate? Use complete sentences to support your answer by explaining how this can be demonstrated.
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please use complete sentences for the answer/an explanation, i'm confused on this questionn v( ‘.’ )v ...
Answer:Instead of “theory” scientists use the word hypothesis to describe a possible explanation for a scientific mystery. Theories in science are hypotheses that.
Explanation:
please help
with this question
What is convection?
a Transfer of heat through objects touching the source
b Transfer of heat through direct physical contact
c Transfer of heat through electromagnetic waves
d Transfer of heat through the movement of particles
Answer:
d transfer of heat through the movement of particles
The correct answer is option d: Transfer of heat through the movement of particles. Convection is a mode of heat transfer that occurs through the movement of particles.
Convection is the transfer of heat through the movement of particles in a fluid, such as a gas or liquid. Option (d) is the correct answer. Convection occurs when a temperature difference exists within the fluid, causing the hotter particles to become less dense and rise while the cooler particles sink. This movement creates a circulation pattern known as convection currents. Convection is a significant mechanism for heat transfer in various natural and man-made systems. For example, when a pot of water is heated on a stove, the bottom of the pot gets hot, causing the water near the bottom to heat up and expand. This hot water rises to the top, transferring heat to the surrounding cooler water. As a result, the water circulates in a convection current, leading to a more uniform distribution of heat. Convection is also responsible for phenomena like ocean currents, atmospheric circulation, and even the formation of thunderstorms. It plays a crucial role in distributing heat within the Earth's atmosphere and oceans, impacting weather patterns and climate.
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can someone explain what these are used for our teacher never taught us about it
1st one so nonthing gets in your eyes
2nd one so nonthing gets on your shirt
3rd one is to wash your eyes when stuff gets in them
4th is when a fire breaks out and you use that to get rid of it
5th is for when someone is on fire you wave them with it
1. If the frequency of a wave increases from 2 Hz to 4 Hz without the wavelength changing, how will the wave speed change?
Answer:
Given expression: 6(2b-4). To find the value of 6(2b-4) at b= 5, we need to substitute the b=5 in the expression, we get….Therefore, the value of 6(2b-4) is 36, when b=5.
Explanation:
Given expression: 6(2b-4). To find the value of 6(2b-4) at b= 5, we need to substitute the b=5 in the expression, we get….Therefore, the value of 6(2b-4) is 36, when b=5.
When an object is moving on a surface with a lot of texture, how does this affect the amount of friction created?
The friction is stopped.
Less friction is created.
More friction is created.
The amount of friction is the same.
What happens in a landslide?
Water moves into an area where it does not belong.
Earth materials that are no longer held by friction move down a slope.
The upper region of a hill becomes built up by rocks.
Soil washes away into a stream.
(This is science)
In order for convection to transfer heat, particles need to
a circulate and move within a liquid or gas
b make contact with the heat source
c transmit electromagnetic waves
Calculate the mass of a liquid with a density of 4.7 g/mL and a volume of 15 mL. pls help me
Answer:0.31
Explanation:that the answer
Answer:
biraz naruto izle
Explanation:
What did you have to look at it in order to correctly measure the amount of water in the graduated cylinder?
Answer:
Water sticks to the walls of the graduated cylinder, but only on the sides and not the middle. When students look at the surface, the water level is not straight.
Explanation:
meninges
meniscus
measles
metatarsle
Whats the effect?
A wave enters a new medium perpendicular to the boundary between the two media.
Answer: A wave
Explanation:
Because it’s the one that’s cause the new medium to go between the two media.
Answer 1-8
(ANSWER THE WHOLE THING AND NOT JUST 1-2 QUESTIONS)
1. D
2. C
3. A
4. B
5. D
6. B
7. C
8. A
What type of spectrum is produced when electromagnetic radiation is emitted or absorbed as electrons change energy levels in an atom?
The type of spectrum is produced when electromagnetic radiation is emitted or absorbed as electrons change energy levels in an atom is hydrogen spectrum.
What is hydrogen spectrum?The hydrogen spectrum is given by the scientist Bohr and it consist of series name lyman, balmer, paschen, bracklet and p- fund as the electromagnetic radiations splits into this.
The lyman series is formed when electrons jumps from any hige energy level to n = 1 and will be same for balmer , pachen ,bracklet and p-fund are obtained when electrons jumps from any higher energy level to n = 2,3,4 and 5 respectively.
Therefore, type of spectrum is produced when electromagnetic radiation is emitted or absorbed as electrons change energy levels in an atom is hydrogen spectrum.
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What is the effect
A wave enters a new medium perpendicular to the boundary between the two media.
Answer:
something that is produced by an agency or cause; result; consequence: Exposure to the sun had the effect of toughening his skin. power to produce results; efficacy; force; influence: His protest had no effect.
Refraction is the change in direction of propagation of a wave when the wave passes from one medium into another, and changes its speed. Light waves are refracted when crossing the boundary from one transparent medium into another because the speed of light is different in different media.
Explanation:
hope the answer was helpful...
DUE SOON PLEASE HELP WILL MAKE FIRST ANSWER BRAINLIEST!!!
You have explored some interesting, informative, and amusing examples of models. Now it's time to get creative and make your own model. Here is the requirement checklist for your model:
-Model types can include drawings, diagrams, physical models, virtual simulations, or videos.
-Models must be created by you, not something selected from an online or outside source.
-Submit a presentation, picture, video, or screenshot of your model.
-Submit a one-paragraph summary describing the topic you chose, your model, what it represents, how you made it, and the specific science involved. It is important that you are using science terminology and are accurate.
Now that you know how to create and submit your model, you will need to choose a topic for your model. Choose one of the three topics listed below. Select each topic for an overview.
1- Conservation of Mass-Explore the law of conservation of mass. Model a physical or chemical change, and then demonstrate how mass is conserved before and after the change.
2- Atomic Theory-Explore the atomic theory of atoms. Create a model that represents the motion and intermolecular attractions of particles in solids, liquids, and gases.
3- Thermal Energy-Explore the effects of thermal energy. Model how adding or removing thermal energy affects motion in particles in a pure substance, such as water, or in a chemical reaction.
!!PLEASE CHOOSE ONE OF THE 3 ABOVE!!
Answer:
Choice 3
Explanation:
I think it would be the easiest
the difference between the three types of mechanical waves.
EASY How does the force of friction affect the motion of objects?
It causes the object to change direction.
It causes the object to create heat energy.
It causes the object to create kinetic energy.
It causes the object to slow down or stop.
Answer:
It causes the object to slow down or stop.
Explanation:
Friction is a unknown force pressing against another force slightly, making the moving object slow down.
general properties shared by all waves.
Answer:
All kinds of waves have the same fundamental properties of reflection, refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude.
How does changing the Amplitude affect the energy of the wave?
2. Record your observations about what happens to a wave when it reaches the boundary between two media.
the wave bounces back off the first media and returns to it origanal resting place
Explanation:
When a force is applied to an object, its _____, the object _________________________________________________________.
Subject = Science
2 QUESTIONS: ANSWER THIS with a proper answer plz. PLZ DO NOT ANSWER JUST FOR MY BRAINLY POINTS!!!!
15. For elements 1-36, there are two exceptions to the filling order as predicted from the periodic table. Draw the atomic orbital diagrams for the two exceptions and indicate how many unpaired electrons are present.
16. The elements Si, Ga, As, Ge, Al, Cd, S, and Se are all used in the manufacture of various semiconductor devices. Write the expected electron configuration for these atoms.
Answer:
Si hay algo que sucedió entre ustedes raro o un comportamiento que tuviste con esa persona o que te vio hacer asi como le pudieron decir algo de ti que no le gustara a tu amigo hace que se comporte raro contigo
Explanation:
Calculate the mass of a liquid with a density of 4.7 g/mL and a volume of 15 mL. help me plssssssssssssssssssssssssssssssssss
Answer:
70.5g
Explanation:
D=M/V
D=4.7 g/ml
V=15ml
plug into equation
4.7=m/15
multiply both sides by 15
m=70.5g
Answer:
70.5g/ml
Explanation:
density times volume