Which describes how chemical changes are different from physical changes?
Select one: a. Chemical changes can be measured, but physical changes cannot. b. Chemical changes involve the formation of a new substance. c. Chemical changes release energy, but physical changes absorb energy. d. Chemical changes cannot be caused by oxygen.
Answers
Answer:
B. Chemical changes involve the formation of a new substance.
Explanation:
They can both release energy, both can be measured, and chemical changes can be caused by oxygen, so I believe it would be B.
Related Questions
Compare and contrast intensive and extensive physical properties, and give 3 examples of each.
Answers
Answer:
Intensive properties do not depend on the quantity of matter. Examples include density, state of matter, and temperature. Extensive properties do depend on sample size. Examples include volume, mass, and size.Intensive properties do not depend on the quantity of matter. Examples include density, state of matter, and temperature. Extensive properties do depend on sample size. Examples include volume, mass, and size.
Explanation:
1. In Physics, we distinguish between wave motion and particle motion Wave motion
refers to the movement of a wave-like pattern from one location on the medium to
another. When you view a water wave moving along the surface of water, you are
observing wave motion. There is a very obvious movement of a collection of crests and
troughs along the water surface. In the Simple Wave Simulator, there is a collection of
crests and troughs moving through a rope this is wave motion. But there are also three
points on the rope that are colored red. When you observe the motion of these points.
you are observing particle motion - the motion of particles of the rope. Describe the
motion of these particles.
Answers
Answer:
Look at explanation
Explanation:
One of the easier ways to define wave motion is the continuous movement of particles. When we have a rope for example and whip it, the first particle bumps into the second one then into the third and so on and so forth until the end of the rope. Particles can only move up and down or left and right and the vibration caused by each particle is what sets off the wave motion.
Earth's orbit is an ellipse. Which of the following ellipses most closely resembles the exact shape of Earth's orbit, as seen from directly above the North Pole?
Answers
Earth is revolving around the sun in an elliptical orbit, with sun as one of its focus. So, the correct shape is A.
What is Newton's law of gravity ?Newton's law of gravity states that, every body in the universe attract each other with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Here,
Earth is revolving around the sun in an elliptical orbit, with sun as its focus.
According to Kepler's law of orbits, every planet moves in an elliptical orbit with sun as one of its focus.
From, Newton's law of gravity and Kepler's law of orbital motion, we can say that the earth is moving in an elliptical orbit because, the earth is experiencing gravitational force of attraction due to the sun at the centre and also due to the other planets revolving in the solar system.
Due to the overall gravitational force, the earth will have to adjust the orbital motion in order to attain stability. As a result, the orbit of earth will have a distortion from its circular shape, forming an elliptical shape for orbit, which is a stable shape.
Hence,
Earth is revolving around the sun in an elliptical orbit, with sun as one of its focus. So, the correct shape is D
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If two forces act on an object in the same direction, the net
force is equal to the
of the two forces.
Answers
Answer:
yes, the net force is equally two forces sorry I am just try this question about
Explanation:
l don't knowAnswer:
sum
Explanation:
If two forces act on an object in the same direction, the net force is equal to the sum of the two forces.
Which effect is created when two sound waves that are close in pitch
interact?
O A. Echoes
O B. Loudness
C. Beats
O D. Intensity
Answers
Answer:
C. Beats
Explanation:
When waves are interfering with each other, the sound is louder in some places and softer in others. As a result, we hear pulses or beats in the sound.
Answer:
beats
Explanation:
got it right
SCIENCE:
In 2-3 complete sentences, explain how a satellite goes into orbit remains in orbit in your own words.
Use the "RAP" method to answer this question:
Restate the question
Answer the question
Prove your answer citing textual evidence from the course.
Don't forget to proofread your answer.
Answers
Answer:
A satellite goes into orbit by getting a ride with a rocket or the Space Shuttle. Gravitational pull and the velocity of the satellite help it remain in orbit.
Explanation:
source: NASA (National Aeronautics and Space Administration)
You are riding a bicycle home from school. You average 5 meters per second and you are headed south.
What motion can you determine from this data? Select all that apply.
A
Velocity
B
Acceleration
Distance
Speed
Answers
Velocity measures the speed of an object in a particular direction. It is a vector quantity. It depends on the magnitude and the direction.
How are Volocity and Acceleration related?
Answers
Answer:
Velocity is the rate of change of position with respect to time, whereas acceleration is the rate of change of velocity. Both are vector quantities (and so also have a specified direction), but the units of velocity are meters per second while the units of acceleration are meters per second squared.
Explanation:
THANK YOU!
Hope this helps.
REALLY NEED HELP, 3 QUESTIONS 20 POINTS. ONLY ANSWER IF YOU KNOW THE CORRECT ANSWER. DO NOT ANSWER WITH "I DON'T KNOW, SORRY" JUST FOR THE BRAINLY POINTS. Thanks very much, have a great day. ( I Will report you if you answer with "I don't know, sorry"
1) A spring with a natural height of 60 mm is compressed by a 300 g mass to a new height of 54 mm.
Find the spring constant in SI units.
Find the height of the spring if the 300 g mass were replaced by a 400 g mass
2) A spring is stretched by 2m with a force of 100 N. Calculate its spring constant.
3) You have just bought an innerspring mattress that contains coil springs in a rectangular array 20 coils wide and 40 coils long. You estimate that when you lie on the mattress, your weight is supported by about 200 springs (about one-fourth of the total number of springs in the mattress). You observe that the springs compress
about 2.0 cm when you lie on the mattress. Assuming that your weight of 600 N is supported equally by 200 springs, find the force constant of each spring.
Answers
Answer:
1. a. -490N/m
b. -653.333N/m
2. -50N/m
3. (i don't know this one but i hope the rest is helpful)
Dean Potter is known for slacklinging across a 615 meter deep ravine in Yosemite National Park with no safety gear. If his mass is 67 kg, how much potential energy did he have?
Answers
Explanation:
the gravitational potential energy applies.
the formula :
PE = m×g×h
mass × gravitational acceleration × height
in our case
PE = 67 kg × 9.81 m/s² × 615 m = 404,221.05 J
Soil classification is partially determined by the presence of organic material, such as humus. Which would have more humus—a desert or a forest—and why? Check all that apply.
a forest because it has more trees to provide plant litter
a desert because it has soil with a larger particle size
a forest because it has more animals to mix the soil
a forest because the trees prevent rain from reaching the soil
a desert because the dry air decomposes plant litter
Answers
a desert because it has soil with a larger particle size. Hence option B is correct. Hence option B is correct.
What is Dessert ?Dessert is the final course of a meal. The dish includes sweet snacks like sweets and sometimes a beverage like dessert wine or liqueur. There is no tradition of a dessert course to finish a dinner in several regions of the world, such as Greece and West Africa, and in most parts of China.
Desserts include biscuits, cakes, cookies, custards, gelatins, ice creams, pastries, pies, puddings, macaroons, sweet soups, tarts, and fruit salad. Fruit is also typically seen in dessert courses due to its inherent sweetness. Desserts are made in certain cultures by sweetening savoury dishes. In the 18th and 19th centuries, when refined sugar and wheat were widely available and ostentation and artifice were desired, the dessert course achieved its pinnacle in the feasts of the European courts. Numerous creams, tarts, fruits, cakes, pastries, puddings, jellies, and meringues were given on tables decorated with flowers and architectural fancies made of sugar and pastry.
Hence option B is correct.
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Answer: The answers are a & c.
Explanation: I just did it
Plzz zzzzz help meeeee
In what way is this not a good model of how igneous rock forms?
Answers
Answer:
That's a great model
Explanation:
igneous rock is formed from magma
a women runs 1 kilometers (1000 meters) with a force 210, and an output power of 500. how long does it take her to run 2 kilometers (2000 meters)?
Answers
Explanation:
woman runs a kilometer using a force of 210 N and a power output of 500 W. How long in minutes does it take this woman to complete 1 kilometer?
How many basic locomotor skills are there?
Answers
Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula
KE = one half.mv2, where m is the mass and v is the speed (velocity). Assume that the speed of the soda bottle falling from a height of
0.8 m will be 4 m/s, and use this speed for each calculation.
Record your calculations in Table A of your Student Guide.
When the mass of the bottle is 0.125 kg, the KE is
kg m2/s2.
When the mass of the bottle is 0.250 kg, the KE is
kg m2/s2.
When the mass of the bottle is 0.375 kg, the KE is
kg m2/s2.
When the mass of the bottle is 0.500 kg, the KE is
kg m2/s2.
Answers
1. The kinetic energy of the bottle is 1 Kg.m²/s²
2. The kinetic energy of the bottle is 2 Kg.m²/s²
3. The kinetic energy of the bottle is 3 Kg.m²/s²
4. The kinetic energy of the bottle is 40 Kg.m²/s²
How do I determine the kinetic energy?The kinetic energy can be obtain as illustrated below:
1. For mass 0.125 Kg
Mass (m) = 0.125 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.125 × 4²
Kinetic energy = 1 Kg.m²/s²
2. For mass 0.250 Kg
Mass (m) = 0.250 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.250 × 4²
Kinetic energy = 2 Kg.m²/s²
3. For mass 0.375 Kg
Mass (m) = 0.375 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.375 × 4²
Kinetic energy = 3 Kg.m²/s²
4. For mass 0.500 Kg
Mass (m) = 0.500 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.500 × 4²
Kinetic energy = 40 Kg.m²/s²
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The change in kinetic energies are 1 \(kg m^{2}/s^{2}\), 2 \(kg m^{2}/s^{2}\), 3 \(kg m^{2}/s^{2}\), and 4 \(kg m^{2}/s^{2}\) respectively as the mass of the bottle is changed as 0.125kg, 0.250kg, 0.375kg, and 0.500kg.
Given the velocity v=4m/s.
KE=\(1/2 mv^{2}\)
Here KE represents the Kinetic energy of the bottle, m represents the mass of the bottle which is varying time to time, and v represents the velocity of the bottle which is constant over time.
For the first case:
Given mass m=0.125kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.125)*(4)²
=1 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.125kg is 1 kg m²/s².
For the second case:
Given mass m=0.250kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.250)*(4)²
=2 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.250kg is 2 kg m²/s².
For the third case:
Given mass m=0.375kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.375)*(4)²
=3 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.375kg is 3 kg m²/s².
For the final case:
Given mass m=0.500kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.500)*(4)²
=4 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.500kg is 4 kg m²/s².
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Please select the word from the list that best fits the definition
Gives a pictorial indication of how far and fast an object has moved
a. speed
b. velocity
c. frame of reference
Answers
Answer: the answer is C
Explanation:
hope it helps friend :)
The Ancient Roman economy did not make use of
A: barter
B: trade
C: coins
D: paper money
Answers
Answer:
D paper money. The ancient Romans did not use any paper money instead their currency was coins.
All of the other ones mentioned were used in Ancient Rome.
Ken wants to jump and have some fun too! Barbie loans Ken her bungee cord. Is this a good idea? Explain with evidence and reasoning. (barbie bungee jump lab)
Answers
Answer:To ensure a safe and thrilling jump you will determine the relationship between the jump height and the
number of rubber bands used to make the bungee cord. You must allow your Barbie doll to come as
close to the floor as possible without sustaining any injuries or fatalities.
Explanation:
Kanye or dababy? Explain your answer.
Answers
Answer:
Khalid
Explanation: Because he is better
It’s 11:53pm right now and I have just this assignment left to do for this class, I need this assignment done so I don’t fail this class, can I get some help please, I will literally give you brainliest if I get full and correct answers I just need to finish this now and I’m exhuasted, watching the video for it would just make me too tired to stay awke thank you
Answers
Answer:
Explanation:
1 matter
2 the chain / air pressure
3 gravity
4 in the cup
5 inertia
6 pushed or pulled
7 rest
8 motion
9 mass
10 reaction
11 b
12 a
13 grams
14 listen to the song
2. Gravity
3. Gravity
7. rest
8. motion
9. Mass times acceleration
11. A
12. B
13. Grams
14. Connected
That’s all I got sorry
Please can someone help me need help with these 5 questions!! and QUICK!
I need it done REALLLLLYYYYY soon!! (more like now but-)
(20 points for the answer to all of them)
Answers
Answer:
10. dependent as a change has occurred which has affected something else which is measurable.
11. dependent as a change is made to the environment this is why some species cannot live there as they have adapted to the climate.
12. Dependent due to change occurring it has resulted in the population decreasing which is measurable.
13. Dependent as the animal's and plants' survival is reliant on the environment.
14. Dependant as the plants require sunlight for photosynthies
Answer:
All are dependent
Explanation:
In which state is the best known source of petrified wood located? A Arizona B Alaska C California D Colorado
Answers
Answer:
Arizona.
Explanation:
Petrified Forest National Park is an American national park in Navajo and Apache counties in northeastern Arizona. Named for its large deposits of petrified wood, the park covers about 346 square miles (900 square kilometers), encompassing semi-desert shrub steppe as well as highly eroded and colorful badlands.
What is the formula of acceleration?
Answers
Pay attention to what happens to the things around you as you go about your day. Describe THREE examples of Newton’s third law in action (use different ones from those described in the lesson). In your examples describe the action and the equal and opposite reaction. Must be at least three full sentences and include examples
Answers
Answer:
Examples of Newton's third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air. Engineers apply Newton's third law when designing rockets and other projectile devices. Two other examples are: As a professor paces in front of a whiteboard, he exerts a force backward on the floor. A car accelerates forward because the ground pushes forward on the drive wheels, in reaction to the drive wheels pushing backward on the ground.
Explanation:
What property is both physical and extensive?
Answers
Answer:
Mark me brainliest （⌒▽⌒）（⌒▽⌒）Explanation:
Physical properties: Matter has mass and volume, as demonstrated by this concrete block. You can observe its mass by feeling how heavy it is when you try to pick it up; you can observe its volume by looking at it and noticing its size. Mass and volume are both examples of extensive physical properties.The work input = _____.
F i ÷ d i
F o ÷ d o
F o × d o
F i × d i
Answers
The work input = Fi × di
How to solve for work input?To solve for work input, you need to know the force acting on an object and the distance it moves in the direction of the force. Work input is defined as the product of force and distance, given by the formula:
Work Input = Force × Distance × cosθ
Where θ is the angle between the force vector and the direction of motion. If the force is applied in the direction of motion, then θ = 0 and cosθ = 1, so the formula simplifies to:
Work Input = Force × Distance
For example, if you are pushing a box with a force of 50 newtons over a distance of 10 meters, the work input would be:
Work Input = 50 N × 10 m × cos(0°) = 500 Joules
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Answer: F i × d i
Explanation:
Please help me with this question: What do space probes do in space? Please explain your answer with 5 sentences or more.
Answers
Answer:
Explanation:A space probe is an unpiloted, unmanned device sent to explore space and gather scientific information. A space probe is launched from Earth with a set of scientific instruments and tools used to study the atmosphere and composition of space and other planets, moons, or celestial bodies.
Help with physics homework
Answers
A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material? A. Is the material malleable or ductile? B. Does the material feel hard to the touch? C. Will the material float in water? D. Does the material feel rough or smooth?
Answers
Answer: A.) Is the material malleable or ductile.
Explanation: It the material is malleable, then it wouldn’t be a metal due to it changing shape.
The question that will best help the student classify the material is, Option A. Is the material malleable or ductile
A malleable material is one in which a thin sheet can be easily formed by hammering. Gold is the most malleable metal. In contrast, ductility is the ability of a solid material to deform under tensile stress.
Metallic Elements are Malleable and ductile and Conduct heat and electricity Nonmetallic elements are Brittle, hard or soft and Poor conductors of electricity.Learn more:
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Foliation occurs when minerals are flattened by heat and pressure. this results in a layered or banded texture. What type of rock do you think is foliated?
Answers
Visible silicate minerals split into dark and light bands or lineations in a metamorphic foliation known as gneissic banding. Typically coarse and frequently folded, these grains. Gneiss is the name for a rock with this texture.
Some kinds of metamorphic rocks -- granite gneiss and biotite schist are two examples -- are strongly banded or foliated. (Foliated means the parallel arrangement of certain mineral grains that gives the rock a striped appearance.)